cpython-lru_cache-weakref: Python/peephole.c annotate

annotate Python/peephole.c @ 80661:94de77bd0b4b 2.7

Issue #16194: document imp.load_dynamic problems when read several extension modules from the same binary object file.

author	Andrew Svetlov <andrew.svetlov@gmail.com>
date	Thu, 29 Nov 2012 19:51:28 +0200
parents	9481e062fe26
children

rev	line source
40998 4e3481961fbb Fix embarrassing typo and fix constantification of None Raymond Hettinger <python@rcn.com> parents: 40116 diff changeset	1 /* Peephole optimizations for bytecode compiler. */
39600 5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	2
5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	3 #include "Python.h"
5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	4
5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	5 #include "Python-ast.h"
5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	6 #include "node.h"
5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	7 #include "pyarena.h"
5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	8 #include "ast.h"
5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	9 #include "code.h"
5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	10 #include "compile.h"
5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	11 #include "symtable.h"
5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	12 #include "opcode.h"
5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	13
5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	14 #define GETARG(arr, i) ((int)((arr[i+2]<<8) + arr[i+1]))
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	15 #define UNCONDITIONAL_JUMP(op) (op==JUMP_ABSOLUTE \|\| op==JUMP_FORWARD)
51920 ef8fe9088696 Backport r69961 to trunk, replacing JUMP_IF_{TRUE,FALSE} with Jeffrey Yasskin <jyasskin@gmail.com> parents: 47527 diff changeset	16 #define CONDITIONAL_JUMP(op) (op==POP_JUMP_IF_FALSE \|\| op==POP_JUMP_IF_TRUE \
61463 fd25030223b0 Untabify C files. Will watch buildbots. Antoine Pitrou <solipsis@pitrou.net> parents: 54972 diff changeset	17 \|\| op==JUMP_IF_FALSE_OR_POP \|\| op==JUMP_IF_TRUE_OR_POP)
51920 ef8fe9088696 Backport r69961 to trunk, replacing JUMP_IF_{TRUE,FALSE} with Jeffrey Yasskin <jyasskin@gmail.com> parents: 47527 diff changeset	18 #define ABSOLUTE_JUMP(op) (op==JUMP_ABSOLUTE \|\| op==CONTINUE_LOOP \
61463 fd25030223b0 Untabify C files. Will watch buildbots. Antoine Pitrou <solipsis@pitrou.net> parents: 54972 diff changeset	19 \|\| op==POP_JUMP_IF_FALSE \|\| op==POP_JUMP_IF_TRUE \
fd25030223b0 Untabify C files. Will watch buildbots. Antoine Pitrou <solipsis@pitrou.net> parents: 54972 diff changeset	20 \|\| op==JUMP_IF_FALSE_OR_POP \|\| op==JUMP_IF_TRUE_OR_POP)
51920 ef8fe9088696 Backport r69961 to trunk, replacing JUMP_IF_{TRUE,FALSE} with Jeffrey Yasskin <jyasskin@gmail.com> parents: 47527 diff changeset	21 #define JUMPS_ON_TRUE(op) (op==POP_JUMP_IF_TRUE \|\| op==JUMP_IF_TRUE_OR_POP)
39600 5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	22 #define GETJUMPTGT(arr, i) (GETARG(arr,i) + (ABSOLUTE_JUMP(arr[i]) ? 0 : i+3))
5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	23 #define SETARG(arr, i, val) arr[i+2] = val>>8; arr[i+1] = val & 255
5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	24 #define CODESIZE(op) (HAS_ARG(op) ? 3 : 1)
5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	25 #define ISBASICBLOCK(blocks, start, bytes) \
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	26 (blocks[start]==blocks[start+bytes-1])
39600 5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	27
5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	28 /* Replace LOAD_CONST c1. LOAD_CONST c2 ... LOAD_CONST cn BUILD_TUPLE n
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	29 with LOAD_CONST (c1, c2, ... cn).
39600 5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	30 The consts table must still be in list form so that the
5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	31 new constant (c1, c2, ... cn) can be appended.
5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	32 Called with codestr pointing to the first LOAD_CONST.
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	33 Bails out with no change if one or more of the LOAD_CONSTs is missing.
39600 5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	34 Also works for BUILD_LIST when followed by an "in" or "not in" test.
5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	35 */
5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	36 static int
46062 09adff3d6691 Try to fix a bunch of compiler warnings on Win64. Neal Norwitz <nnorwitz@gmail.com> parents: 45511 diff changeset	37 tuple_of_constants(unsigned char codestr, Py_ssize_t n, PyObject consts)
39600 5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	38 {
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	39 PyObject newconst, constant;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	40 Py_ssize_t i, arg, len_consts;
39600 5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	41
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	42 /* Pre-conditions */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	43 assert(PyList_CheckExact(consts));
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	44 assert(codestr[n3] == BUILD_TUPLE \|\| codestr[n3] == BUILD_LIST);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	45 assert(GETARG(codestr, (n*3)) == n);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	46 for (i=0 ; i<n ; i++)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	47 assert(codestr[i*3] == LOAD_CONST);
39600 5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	48
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	49 /* Buildup new tuple of constants */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	50 newconst = PyTuple_New(n);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	51 if (newconst == NULL)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	52 return 0;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	53 len_consts = PyList_GET_SIZE(consts);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	54 for (i=0 ; i<n ; i++) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	55 arg = GETARG(codestr, (i*3));
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	56 assert(arg < len_consts);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	57 constant = PyList_GET_ITEM(consts, arg);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	58 Py_INCREF(constant);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	59 PyTuple_SET_ITEM(newconst, i, constant);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	60 }
39600 5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	61
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	62 /* Append folded constant onto consts */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	63 if (PyList_Append(consts, newconst)) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	64 Py_DECREF(newconst);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	65 return 0;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	66 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	67 Py_DECREF(newconst);
39600 5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	68
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	69 /* Write NOPs over old LOAD_CONSTS and
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	70 add a new LOAD_CONST newconst on top of the BUILD_TUPLE n */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	71 memset(codestr, NOP, n*3);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	72 codestr[n*3] = LOAD_CONST;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	73 SETARG(codestr, (n*3), len_consts);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	74 return 1;
39600 5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	75 }
5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	76
5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	77 /* Replace LOAD_CONST c1. LOAD_CONST c2 BINOP
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	78 with LOAD_CONST binop(c1,c2)
39600 5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	79 The consts table must still be in list form so that the
5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	80 new constant can be appended.
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	81 Called with codestr pointing to the first LOAD_CONST.
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	82 Abandons the transformation if the folding fails (i.e. 1+'a').
39600 5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	83 If the new constant is a sequence, only folds when the size
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	84 is below a threshold value. That keeps pyc files from
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	85 becoming large in the presence of code like: (None,)*1000.
39600 5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	86 */
5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	87 static int
5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	88 fold_binops_on_constants(unsigned char codestr, PyObject consts)
5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	89 {
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	90 PyObject newconst, v, *w;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	91 Py_ssize_t len_consts, size;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	92 int opcode;
39600 5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	93
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	94 /* Pre-conditions */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	95 assert(PyList_CheckExact(consts));
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	96 assert(codestr[0] == LOAD_CONST);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	97 assert(codestr[3] == LOAD_CONST);
39600 5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	98
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	99 /* Create new constant */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	100 v = PyList_GET_ITEM(consts, GETARG(codestr, 0));
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	101 w = PyList_GET_ITEM(consts, GETARG(codestr, 3));
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	102 opcode = codestr[6];
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	103 switch (opcode) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	104 case BINARY_POWER:
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	105 newconst = PyNumber_Power(v, w, Py_None);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	106 break;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	107 case BINARY_MULTIPLY:
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	108 newconst = PyNumber_Multiply(v, w);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	109 break;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	110 case BINARY_DIVIDE:
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	111 /* Cannot fold this operation statically since
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	112 the result can depend on the run-time presence
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	113 of the -Qnew flag */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	114 return 0;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	115 case BINARY_TRUE_DIVIDE:
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	116 newconst = PyNumber_TrueDivide(v, w);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	117 break;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	118 case BINARY_FLOOR_DIVIDE:
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	119 newconst = PyNumber_FloorDivide(v, w);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	120 break;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	121 case BINARY_MODULO:
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	122 newconst = PyNumber_Remainder(v, w);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	123 break;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	124 case BINARY_ADD:
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	125 newconst = PyNumber_Add(v, w);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	126 break;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	127 case BINARY_SUBTRACT:
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	128 newconst = PyNumber_Subtract(v, w);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	129 break;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	130 case BINARY_SUBSCR:
80248 9481e062fe26 #5057: the peepholer no longer optimizes subscription on unicode literals (e.g. u"foo"[0]) in order to produce compatible pyc files between narrow and wide builds. Ezio Melotti <ezio.melotti@gmail.com> parents: 78210 diff changeset	131 /* #5057: if v is unicode, there might be differences between
9481e062fe26 #5057: the peepholer no longer optimizes subscription on unicode literals (e.g. u"foo"[0]) in order to produce compatible pyc files between narrow and wide builds. Ezio Melotti <ezio.melotti@gmail.com> parents: 78210 diff changeset	132 wide and narrow builds in cases like '\U00012345'[0] or
9481e062fe26 #5057: the peepholer no longer optimizes subscription on unicode literals (e.g. u"foo"[0]) in order to produce compatible pyc files between narrow and wide builds. Ezio Melotti <ezio.melotti@gmail.com> parents: 78210 diff changeset	133 '\U00012345abcdef'[3], so it's better to skip the optimization
9481e062fe26 #5057: the peepholer no longer optimizes subscription on unicode literals (e.g. u"foo"[0]) in order to produce compatible pyc files between narrow and wide builds. Ezio Melotti <ezio.melotti@gmail.com> parents: 78210 diff changeset	134 in order to produce compatible pycs.
9481e062fe26 #5057: the peepholer no longer optimizes subscription on unicode literals (e.g. u"foo"[0]) in order to produce compatible pyc files between narrow and wide builds. Ezio Melotti <ezio.melotti@gmail.com> parents: 78210 diff changeset	135 */
9481e062fe26 #5057: the peepholer no longer optimizes subscription on unicode literals (e.g. u"foo"[0]) in order to produce compatible pyc files between narrow and wide builds. Ezio Melotti <ezio.melotti@gmail.com> parents: 78210 diff changeset	136 if (PyUnicode_Check(v))
9481e062fe26 #5057: the peepholer no longer optimizes subscription on unicode literals (e.g. u"foo"[0]) in order to produce compatible pyc files between narrow and wide builds. Ezio Melotti <ezio.melotti@gmail.com> parents: 78210 diff changeset	137 return 0;
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	138 newconst = PyObject_GetItem(v, w);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	139 break;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	140 case BINARY_LSHIFT:
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	141 newconst = PyNumber_Lshift(v, w);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	142 break;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	143 case BINARY_RSHIFT:
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	144 newconst = PyNumber_Rshift(v, w);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	145 break;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	146 case BINARY_AND:
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	147 newconst = PyNumber_And(v, w);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	148 break;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	149 case BINARY_XOR:
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	150 newconst = PyNumber_Xor(v, w);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	151 break;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	152 case BINARY_OR:
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	153 newconst = PyNumber_Or(v, w);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	154 break;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	155 default:
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	156 /* Called with an unknown opcode */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	157 PyErr_Format(PyExc_SystemError,
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	158 "unexpected binary operation %d on a constant",
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	159 opcode);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	160 return 0;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	161 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	162 if (newconst == NULL) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	163 PyErr_Clear();
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	164 return 0;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	165 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	166 size = PyObject_Size(newconst);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	167 if (size == -1)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	168 PyErr_Clear();
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	169 else if (size > 20) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	170 Py_DECREF(newconst);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	171 return 0;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	172 }
39600 5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	173
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	174 /* Append folded constant into consts table */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	175 len_consts = PyList_GET_SIZE(consts);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	176 if (PyList_Append(consts, newconst)) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	177 Py_DECREF(newconst);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	178 return 0;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	179 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	180 Py_DECREF(newconst);
39600 5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	181
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	182 /* Write NOP NOP NOP NOP LOAD_CONST newconst */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	183 memset(codestr, NOP, 4);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	184 codestr[4] = LOAD_CONST;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	185 SETARG(codestr, 4, len_consts);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	186 return 1;
39600 5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	187 }
5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	188
5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	189 static int
5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	190 fold_unaryops_on_constants(unsigned char codestr, PyObject consts)
5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	191 {
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	192 PyObject newconst=NULL, v;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	193 Py_ssize_t len_consts;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	194 int opcode;
39600 5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	195
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	196 /* Pre-conditions */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	197 assert(PyList_CheckExact(consts));
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	198 assert(codestr[0] == LOAD_CONST);
39600 5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	199
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	200 /* Create new constant */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	201 v = PyList_GET_ITEM(consts, GETARG(codestr, 0));
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	202 opcode = codestr[3];
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	203 switch (opcode) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	204 case UNARY_NEGATIVE:
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	205 /* Preserve the sign of -0.0 */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	206 if (PyObject_IsTrue(v) == 1)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	207 newconst = PyNumber_Negative(v);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	208 break;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	209 case UNARY_CONVERT:
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	210 newconst = PyObject_Repr(v);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	211 break;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	212 case UNARY_INVERT:
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	213 newconst = PyNumber_Invert(v);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	214 break;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	215 default:
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	216 /* Called with an unknown opcode */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	217 PyErr_Format(PyExc_SystemError,
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	218 "unexpected unary operation %d on a constant",
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	219 opcode);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	220 return 0;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	221 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	222 if (newconst == NULL) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	223 PyErr_Clear();
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	224 return 0;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	225 }
39600 5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	226
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	227 /* Append folded constant into consts table */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	228 len_consts = PyList_GET_SIZE(consts);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	229 if (PyList_Append(consts, newconst)) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	230 Py_DECREF(newconst);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	231 return 0;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	232 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	233 Py_DECREF(newconst);
39600 5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	234
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	235 /* Write NOP LOAD_CONST newconst */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	236 codestr[0] = NOP;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	237 codestr[1] = LOAD_CONST;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	238 SETARG(codestr, 1, len_consts);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	239 return 1;
39600 5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	240 }
5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	241
5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	242 static unsigned int *
46062 09adff3d6691 Try to fix a bunch of compiler warnings on Win64. Neal Norwitz <nnorwitz@gmail.com> parents: 45511 diff changeset	243 markblocks(unsigned char *code, Py_ssize_t len)
39600 5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	244 {
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	245 unsigned int blocks = (unsigned int )PyMem_Malloc(len*sizeof(int));
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	246 int i,j, opcode, blockcnt = 0;
39600 5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	247
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	248 if (blocks == NULL) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	249 PyErr_NoMemory();
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	250 return NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	251 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	252 memset(blocks, 0, len*sizeof(int));
39600 5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	253
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	254 /* Mark labels in the first pass */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	255 for (i=0 ; i<len ; i+=CODESIZE(opcode)) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	256 opcode = code[i];
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	257 switch (opcode) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	258 case FOR_ITER:
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	259 case JUMP_FORWARD:
61463 fd25030223b0 Untabify C files. Will watch buildbots. Antoine Pitrou <solipsis@pitrou.net> parents: 54972 diff changeset	260 case JUMP_IF_FALSE_OR_POP:
fd25030223b0 Untabify C files. Will watch buildbots. Antoine Pitrou <solipsis@pitrou.net> parents: 54972 diff changeset	261 case JUMP_IF_TRUE_OR_POP:
fd25030223b0 Untabify C files. Will watch buildbots. Antoine Pitrou <solipsis@pitrou.net> parents: 54972 diff changeset	262 case POP_JUMP_IF_FALSE:
fd25030223b0 Untabify C files. Will watch buildbots. Antoine Pitrou <solipsis@pitrou.net> parents: 54972 diff changeset	263 case POP_JUMP_IF_TRUE:
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	264 case JUMP_ABSOLUTE:
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	265 case CONTINUE_LOOP:
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	266 case SETUP_LOOP:
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	267 case SETUP_EXCEPT:
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	268 case SETUP_FINALLY:
61463 fd25030223b0 Untabify C files. Will watch buildbots. Antoine Pitrou <solipsis@pitrou.net> parents: 54972 diff changeset	269 case SETUP_WITH:
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	270 j = GETJUMPTGT(code, i);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	271 blocks[j] = 1;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	272 break;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	273 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	274 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	275 /* Build block numbers in the second pass */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	276 for (i=0 ; i<len ; i++) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	277 blockcnt += blocks[i]; /* increment blockcnt over labels */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	278 blocks[i] = blockcnt;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	279 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	280 return blocks;
39600 5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	281 }
5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	282
5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	283 /* Perform basic peephole optimizations to components of a code object.
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	284 The consts object should still be in list form to allow new constants
39600 5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	285 to be appended.
5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	286
5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	287 To keep the optimizer simple, it bails out (does nothing) for code
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	288 containing extended arguments or that has a length over 32,700. That
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	289 allows us to avoid overflow and sign issues. Likewise, it bails when
39600 5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	290 the lineno table has complex encoding for gaps >= 255.
5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	291
5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	292 Optimizations are restricted to simple transformations occuring within a
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	293 single basic block. All transformations keep the code size the same or
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	294 smaller. For those that reduce size, the gaps are initially filled with
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	295 NOPs. Later those NOPs are removed and the jump addresses retargeted in
39600 5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	296 a single pass. Line numbering is adjusted accordingly. */
5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	297
5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	298 PyObject *
5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	299 PyCode_Optimize(PyObject code, PyObject consts, PyObject *names,
5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	300 PyObject *lineno_obj)
5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	301 {
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	302 Py_ssize_t i, j, codelen;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	303 int nops, h, adj;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	304 int tgt, tgttgt, opcode;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	305 unsigned char *codestr = NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	306 unsigned char *lineno;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	307 int *addrmap = NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	308 int new_line, cum_orig_line, last_line, tabsiz;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	309 int cumlc=0, lastlc=0; /* Count runs of consecutive LOAD_CONSTs */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	310 unsigned int *blocks = NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	311 char *name;
39600 5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	312
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	313 /* Bail out if an exception is set */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	314 if (PyErr_Occurred())
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	315 goto exitError;
39600 5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	316
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	317 /* Bypass optimization when the lineno table is too complex */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	318 assert(PyString_Check(lineno_obj));
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	319 lineno = (unsigned char*)PyString_AS_STRING(lineno_obj);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	320 tabsiz = PyString_GET_SIZE(lineno_obj);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	321 if (memchr(lineno, 255, tabsiz) != NULL)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	322 goto exitUnchanged;
39600 5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	323
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	324 /* Avoid situations where jump retargeting could overflow */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	325 assert(PyString_Check(code));
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	326 codelen = PyString_GET_SIZE(code);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	327 if (codelen > 32700)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	328 goto exitUnchanged;
39600 5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	329
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	330 /* Make a modifiable copy of the code string */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	331 codestr = (unsigned char *)PyMem_Malloc(codelen);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	332 if (codestr == NULL)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	333 goto exitError;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	334 codestr = (unsigned char *)memcpy(codestr,
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	335 PyString_AS_STRING(code), codelen);
39600 5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	336
78210 15db88f6321d Fix whitespace Raymond Hettinger <python@rcn.com> parents: 77072 diff changeset	337 /* Verify that RETURN_VALUE terminates the codestring. This allows
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	338 the various transformation patterns to look ahead several
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	339 instructions without additional checks to make sure they are not
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	340 looking beyond the end of the code string.
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	341 */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	342 if (codestr[codelen-1] != RETURN_VALUE)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	343 goto exitUnchanged;
39600 5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	344
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	345 /* Mapping to new jump targets after NOPs are removed */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	346 addrmap = (int )PyMem_Malloc(codelen sizeof(int));
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	347 if (addrmap == NULL)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	348 goto exitError;
39600 5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	349
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	350 blocks = markblocks(codestr, codelen);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	351 if (blocks == NULL)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	352 goto exitError;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	353 assert(PyList_Check(consts));
39600 5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	354
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	355 for (i=0 ; i<codelen ; i += CODESIZE(codestr[i])) {
61463 fd25030223b0 Untabify C files. Will watch buildbots. Antoine Pitrou <solipsis@pitrou.net> parents: 54972 diff changeset	356 reoptimize_current:
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	357 opcode = codestr[i];
39600 5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	358
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	359 lastlc = cumlc;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	360 cumlc = 0;
39600 5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	361
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	362 switch (opcode) {
61463 fd25030223b0 Untabify C files. Will watch buildbots. Antoine Pitrou <solipsis@pitrou.net> parents: 54972 diff changeset	363 /* Replace UNARY_NOT POP_JUMP_IF_FALSE
fd25030223b0 Untabify C files. Will watch buildbots. Antoine Pitrou <solipsis@pitrou.net> parents: 54972 diff changeset	364 with POP_JUMP_IF_TRUE */
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	365 case UNARY_NOT:
61463 fd25030223b0 Untabify C files. Will watch buildbots. Antoine Pitrou <solipsis@pitrou.net> parents: 54972 diff changeset	366 if (codestr[i+1] != POP_JUMP_IF_FALSE
fd25030223b0 Untabify C files. Will watch buildbots. Antoine Pitrou <solipsis@pitrou.net> parents: 54972 diff changeset	367 \|\| !ISBASICBLOCK(blocks,i,4))
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	368 continue;
61463 fd25030223b0 Untabify C files. Will watch buildbots. Antoine Pitrou <solipsis@pitrou.net> parents: 54972 diff changeset	369 j = GETARG(codestr, i+1);
fd25030223b0 Untabify C files. Will watch buildbots. Antoine Pitrou <solipsis@pitrou.net> parents: 54972 diff changeset	370 codestr[i] = POP_JUMP_IF_TRUE;
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	371 SETARG(codestr, i, j);
61463 fd25030223b0 Untabify C files. Will watch buildbots. Antoine Pitrou <solipsis@pitrou.net> parents: 54972 diff changeset	372 codestr[i+3] = NOP;
fd25030223b0 Untabify C files. Will watch buildbots. Antoine Pitrou <solipsis@pitrou.net> parents: 54972 diff changeset	373 goto reoptimize_current;
39600 5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	374
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	375 /* not a is b --> a is not b
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	376 not a in b --> a not in b
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	377 not a is not b --> a is b
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	378 not a not in b --> a in b
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	379 */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	380 case COMPARE_OP:
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	381 j = GETARG(codestr, i);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	382 if (j < 6 \|\| j > 9 \|\|
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	383 codestr[i+3] != UNARY_NOT \|\|
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	384 !ISBASICBLOCK(blocks,i,4))
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	385 continue;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	386 SETARG(codestr, i, (j^1));
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	387 codestr[i+3] = NOP;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	388 break;
39600 5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	389
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	390 /* Replace LOAD_GLOBAL/LOAD_NAME None
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	391 with LOAD_CONST None */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	392 case LOAD_NAME:
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	393 case LOAD_GLOBAL:
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	394 j = GETARG(codestr, i);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	395 name = PyString_AsString(PyTuple_GET_ITEM(names, j));
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	396 if (name == NULL \|\| strcmp(name, "None") != 0)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	397 continue;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	398 for (j=0 ; j < PyList_GET_SIZE(consts) ; j++) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	399 if (PyList_GET_ITEM(consts, j) == Py_None)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	400 break;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	401 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	402 if (j == PyList_GET_SIZE(consts)) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	403 if (PyList_Append(consts, Py_None) == -1)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	404 goto exitError;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	405 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	406 assert(PyList_GET_ITEM(consts, j) == Py_None);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	407 codestr[i] = LOAD_CONST;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	408 SETARG(codestr, i, j);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	409 cumlc = lastlc + 1;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	410 break;
39600 5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	411
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	412 /* Skip over LOAD_CONST trueconst
61463 fd25030223b0 Untabify C files. Will watch buildbots. Antoine Pitrou <solipsis@pitrou.net> parents: 54972 diff changeset	413 POP_JUMP_IF_FALSE xx. This improves
fd25030223b0 Untabify C files. Will watch buildbots. Antoine Pitrou <solipsis@pitrou.net> parents: 54972 diff changeset	414 "while 1" performance. */
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	415 case LOAD_CONST:
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	416 cumlc = lastlc + 1;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	417 j = GETARG(codestr, i);
61463 fd25030223b0 Untabify C files. Will watch buildbots. Antoine Pitrou <solipsis@pitrou.net> parents: 54972 diff changeset	418 if (codestr[i+3] != POP_JUMP_IF_FALSE \|\|
fd25030223b0 Untabify C files. Will watch buildbots. Antoine Pitrou <solipsis@pitrou.net> parents: 54972 diff changeset	419 !ISBASICBLOCK(blocks,i,6) \|\|
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	420 !PyObject_IsTrue(PyList_GET_ITEM(consts, j)))
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	421 continue;
61463 fd25030223b0 Untabify C files. Will watch buildbots. Antoine Pitrou <solipsis@pitrou.net> parents: 54972 diff changeset	422 memset(codestr+i, NOP, 6);
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	423 cumlc = 0;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	424 break;
39600 5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	425
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	426 /* Try to fold tuples of constants (includes a case for lists
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	427 which are only used for "in" and "not in" tests).
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	428 Skip over BUILD_SEQN 1 UNPACK_SEQN 1.
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	429 Replace BUILD_SEQN 2 UNPACK_SEQN 2 with ROT2.
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	430 Replace BUILD_SEQN 3 UNPACK_SEQN 3 with ROT3 ROT2. */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	431 case BUILD_TUPLE:
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	432 case BUILD_LIST:
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	433 j = GETARG(codestr, i);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	434 h = i - 3 * j;
78210 15db88f6321d Fix whitespace Raymond Hettinger <python@rcn.com> parents: 77072 diff changeset	435 if (h >= 0 &&
15db88f6321d Fix whitespace Raymond Hettinger <python@rcn.com> parents: 77072 diff changeset	436 j <= lastlc &&
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	437 ((opcode == BUILD_TUPLE &&
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	438 ISBASICBLOCK(blocks, h, 3*(j+1))) \|\|
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	439 (opcode == BUILD_LIST &&
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	440 codestr[i+3]==COMPARE_OP &&
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	441 ISBASICBLOCK(blocks, h, 3*(j+2)) &&
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	442 (GETARG(codestr,i+3)==6 \|\|
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	443 GETARG(codestr,i+3)==7))) &&
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	444 tuple_of_constants(&codestr[h], j, consts)) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	445 assert(codestr[i] == LOAD_CONST);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	446 cumlc = 1;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	447 break;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	448 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	449 if (codestr[i+3] != UNPACK_SEQUENCE \|\|
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	450 !ISBASICBLOCK(blocks,i,6) \|\|
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	451 j != GETARG(codestr, i+3))
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	452 continue;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	453 if (j == 1) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	454 memset(codestr+i, NOP, 6);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	455 } else if (j == 2) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	456 codestr[i] = ROT_TWO;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	457 memset(codestr+i+1, NOP, 5);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	458 } else if (j == 3) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	459 codestr[i] = ROT_THREE;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	460 codestr[i+1] = ROT_TWO;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	461 memset(codestr+i+2, NOP, 4);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	462 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	463 break;
39600 5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	464
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	465 /* Fold binary ops on constants.
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	466 LOAD_CONST c1 LOAD_CONST c2 BINOP --> LOAD_CONST binop(c1,c2) */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	467 case BINARY_POWER:
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	468 case BINARY_MULTIPLY:
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	469 case BINARY_TRUE_DIVIDE:
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	470 case BINARY_FLOOR_DIVIDE:
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	471 case BINARY_MODULO:
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	472 case BINARY_ADD:
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	473 case BINARY_SUBTRACT:
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	474 case BINARY_SUBSCR:
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	475 case BINARY_LSHIFT:
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	476 case BINARY_RSHIFT:
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	477 case BINARY_AND:
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	478 case BINARY_XOR:
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	479 case BINARY_OR:
78210 15db88f6321d Fix whitespace Raymond Hettinger <python@rcn.com> parents: 77072 diff changeset	480 if (lastlc >= 2 &&
15db88f6321d Fix whitespace Raymond Hettinger <python@rcn.com> parents: 77072 diff changeset	481 ISBASICBLOCK(blocks, i-6, 7) &&
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	482 fold_binops_on_constants(&codestr[i-6], consts)) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	483 i -= 2;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	484 assert(codestr[i] == LOAD_CONST);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	485 cumlc = 1;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	486 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	487 break;
39600 5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	488
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	489 /* Fold unary ops on constants.
78210 15db88f6321d Fix whitespace Raymond Hettinger <python@rcn.com> parents: 77072 diff changeset	490 LOAD_CONST c1 UNARY_OP --> LOAD_CONST unary_op(c) */
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	491 case UNARY_NEGATIVE:
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	492 case UNARY_CONVERT:
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	493 case UNARY_INVERT:
78210 15db88f6321d Fix whitespace Raymond Hettinger <python@rcn.com> parents: 77072 diff changeset	494 if (lastlc >= 1 &&
15db88f6321d Fix whitespace Raymond Hettinger <python@rcn.com> parents: 77072 diff changeset	495 ISBASICBLOCK(blocks, i-3, 4) &&
15db88f6321d Fix whitespace Raymond Hettinger <python@rcn.com> parents: 77072 diff changeset	496 fold_unaryops_on_constants(&codestr[i-3], consts)) {
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	497 i -= 2;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	498 assert(codestr[i] == LOAD_CONST);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	499 cumlc = 1;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	500 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	501 break;
39600 5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	502
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	503 /* Simplify conditional jump to conditional jump where the
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	504 result of the first test implies the success of a similar
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	505 test or the failure of the opposite test.
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	506 Arises in code like:
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	507 "if a and b:"
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	508 "if a or b:"
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	509 "a and b or c"
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	510 "(a and b) and c"
61463 fd25030223b0 Untabify C files. Will watch buildbots. Antoine Pitrou <solipsis@pitrou.net> parents: 54972 diff changeset	511 x:JUMP_IF_FALSE_OR_POP y y:JUMP_IF_FALSE_OR_POP z
fd25030223b0 Untabify C files. Will watch buildbots. Antoine Pitrou <solipsis@pitrou.net> parents: 54972 diff changeset	512 --> x:JUMP_IF_FALSE_OR_POP z
fd25030223b0 Untabify C files. Will watch buildbots. Antoine Pitrou <solipsis@pitrou.net> parents: 54972 diff changeset	513 x:JUMP_IF_FALSE_OR_POP y y:JUMP_IF_TRUE_OR_POP z
fd25030223b0 Untabify C files. Will watch buildbots. Antoine Pitrou <solipsis@pitrou.net> parents: 54972 diff changeset	514 --> x:POP_JUMP_IF_FALSE y+3
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	515 where y+3 is the instruction following the second test.
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	516 */
61463 fd25030223b0 Untabify C files. Will watch buildbots. Antoine Pitrou <solipsis@pitrou.net> parents: 54972 diff changeset	517 case JUMP_IF_FALSE_OR_POP:
fd25030223b0 Untabify C files. Will watch buildbots. Antoine Pitrou <solipsis@pitrou.net> parents: 54972 diff changeset	518 case JUMP_IF_TRUE_OR_POP:
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	519 tgt = GETJUMPTGT(codestr, i);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	520 j = codestr[tgt];
61463 fd25030223b0 Untabify C files. Will watch buildbots. Antoine Pitrou <solipsis@pitrou.net> parents: 54972 diff changeset	521 if (CONDITIONAL_JUMP(j)) {
78210 15db88f6321d Fix whitespace Raymond Hettinger <python@rcn.com> parents: 77072 diff changeset	522 /* NOTE: all possible jumps here are absolute! */
61463 fd25030223b0 Untabify C files. Will watch buildbots. Antoine Pitrou <solipsis@pitrou.net> parents: 54972 diff changeset	523 if (JUMPS_ON_TRUE(j) == JUMPS_ON_TRUE(opcode)) {
fd25030223b0 Untabify C files. Will watch buildbots. Antoine Pitrou <solipsis@pitrou.net> parents: 54972 diff changeset	524 /* The second jump will be
fd25030223b0 Untabify C files. Will watch buildbots. Antoine Pitrou <solipsis@pitrou.net> parents: 54972 diff changeset	525 taken iff the first is. */
fd25030223b0 Untabify C files. Will watch buildbots. Antoine Pitrou <solipsis@pitrou.net> parents: 54972 diff changeset	526 tgttgt = GETJUMPTGT(codestr, tgt);
fd25030223b0 Untabify C files. Will watch buildbots. Antoine Pitrou <solipsis@pitrou.net> parents: 54972 diff changeset	527 /* The current opcode inherits
fd25030223b0 Untabify C files. Will watch buildbots. Antoine Pitrou <solipsis@pitrou.net> parents: 54972 diff changeset	528 its target's stack behaviour */
fd25030223b0 Untabify C files. Will watch buildbots. Antoine Pitrou <solipsis@pitrou.net> parents: 54972 diff changeset	529 codestr[i] = j;
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	530 SETARG(codestr, i, tgttgt);
61463 fd25030223b0 Untabify C files. Will watch buildbots. Antoine Pitrou <solipsis@pitrou.net> parents: 54972 diff changeset	531 goto reoptimize_current;
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	532 } else {
78210 15db88f6321d Fix whitespace Raymond Hettinger <python@rcn.com> parents: 77072 diff changeset	533 /* The second jump is not taken if the first is (so
15db88f6321d Fix whitespace Raymond Hettinger <python@rcn.com> parents: 77072 diff changeset	534 jump past it), and all conditional jumps pop their
15db88f6321d Fix whitespace Raymond Hettinger <python@rcn.com> parents: 77072 diff changeset	535 argument when they're not taken (so change the
15db88f6321d Fix whitespace Raymond Hettinger <python@rcn.com> parents: 77072 diff changeset	536 first jump to pop its argument when it's taken). */
61463 fd25030223b0 Untabify C files. Will watch buildbots. Antoine Pitrou <solipsis@pitrou.net> parents: 54972 diff changeset	537 if (JUMPS_ON_TRUE(opcode))
fd25030223b0 Untabify C files. Will watch buildbots. Antoine Pitrou <solipsis@pitrou.net> parents: 54972 diff changeset	538 codestr[i] = POP_JUMP_IF_TRUE;
fd25030223b0 Untabify C files. Will watch buildbots. Antoine Pitrou <solipsis@pitrou.net> parents: 54972 diff changeset	539 else
fd25030223b0 Untabify C files. Will watch buildbots. Antoine Pitrou <solipsis@pitrou.net> parents: 54972 diff changeset	540 codestr[i] = POP_JUMP_IF_FALSE;
fd25030223b0 Untabify C files. Will watch buildbots. Antoine Pitrou <solipsis@pitrou.net> parents: 54972 diff changeset	541 SETARG(codestr, i, (tgt + 3));
fd25030223b0 Untabify C files. Will watch buildbots. Antoine Pitrou <solipsis@pitrou.net> parents: 54972 diff changeset	542 goto reoptimize_current;
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	543 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	544 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	545 /* Intentional fallthrough */
39600 5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	546
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	547 /* Replace jumps to unconditional jumps */
61463 fd25030223b0 Untabify C files. Will watch buildbots. Antoine Pitrou <solipsis@pitrou.net> parents: 54972 diff changeset	548 case POP_JUMP_IF_FALSE:
fd25030223b0 Untabify C files. Will watch buildbots. Antoine Pitrou <solipsis@pitrou.net> parents: 54972 diff changeset	549 case POP_JUMP_IF_TRUE:
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	550 case FOR_ITER:
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	551 case JUMP_FORWARD:
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	552 case JUMP_ABSOLUTE:
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	553 case CONTINUE_LOOP:
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	554 case SETUP_LOOP:
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	555 case SETUP_EXCEPT:
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	556 case SETUP_FINALLY:
61463 fd25030223b0 Untabify C files. Will watch buildbots. Antoine Pitrou <solipsis@pitrou.net> parents: 54972 diff changeset	557 case SETUP_WITH:
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	558 tgt = GETJUMPTGT(codestr, i);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	559 /* Replace JUMP_* to a RETURN into just a RETURN */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	560 if (UNCONDITIONAL_JUMP(opcode) &&
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	561 codestr[tgt] == RETURN_VALUE) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	562 codestr[i] = RETURN_VALUE;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	563 memset(codestr+i+1, NOP, 2);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	564 continue;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	565 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	566 if (!UNCONDITIONAL_JUMP(codestr[tgt]))
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	567 continue;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	568 tgttgt = GETJUMPTGT(codestr, tgt);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	569 if (opcode == JUMP_FORWARD) /* JMP_ABS can go backwards */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	570 opcode = JUMP_ABSOLUTE;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	571 if (!ABSOLUTE_JUMP(opcode))
78210 15db88f6321d Fix whitespace Raymond Hettinger <python@rcn.com> parents: 77072 diff changeset	572 tgttgt -= i + 3; /* Calc relative jump addr */
15db88f6321d Fix whitespace Raymond Hettinger <python@rcn.com> parents: 77072 diff changeset	573 if (tgttgt < 0) /* No backward relative jumps */
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	574 continue;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	575 codestr[i] = opcode;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	576 SETARG(codestr, i, tgttgt);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	577 break;
39600 5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	578
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	579 case EXTENDED_ARG:
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	580 goto exitUnchanged;
39600 5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	581
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	582 /* Replace RETURN LOAD_CONST None RETURN with just RETURN */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	583 /* Remove unreachable JUMPs after RETURN */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	584 case RETURN_VALUE:
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	585 if (i+4 >= codelen)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	586 continue;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	587 if (codestr[i+4] == RETURN_VALUE &&
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	588 ISBASICBLOCK(blocks,i,5))
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	589 memset(codestr+i+1, NOP, 4);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	590 else if (UNCONDITIONAL_JUMP(codestr[i+1]) &&
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	591 ISBASICBLOCK(blocks,i,4))
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	592 memset(codestr+i+1, NOP, 3);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	593 break;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	594 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	595 }
39600 5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	596
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	597 /* Fixup linenotab */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	598 for (i=0, nops=0 ; i<codelen ; i += CODESIZE(codestr[i])) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	599 addrmap[i] = i - nops;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	600 if (codestr[i] == NOP)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	601 nops++;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	602 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	603 cum_orig_line = 0;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	604 last_line = 0;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	605 for (i=0 ; i < tabsiz ; i+=2) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	606 cum_orig_line += lineno[i];
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	607 new_line = addrmap[cum_orig_line];
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	608 assert (new_line - last_line < 255);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	609 lineno[i] =((unsigned char)(new_line - last_line));
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	610 last_line = new_line;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	611 }
39600 5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	612
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	613 /* Remove NOPs and fixup jump targets */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	614 for (i=0, h=0 ; i<codelen ; ) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	615 opcode = codestr[i];
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	616 switch (opcode) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	617 case NOP:
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	618 i++;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	619 continue;
39600 5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	620
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	621 case JUMP_ABSOLUTE:
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	622 case CONTINUE_LOOP:
61463 fd25030223b0 Untabify C files. Will watch buildbots. Antoine Pitrou <solipsis@pitrou.net> parents: 54972 diff changeset	623 case POP_JUMP_IF_FALSE:
fd25030223b0 Untabify C files. Will watch buildbots. Antoine Pitrou <solipsis@pitrou.net> parents: 54972 diff changeset	624 case POP_JUMP_IF_TRUE:
fd25030223b0 Untabify C files. Will watch buildbots. Antoine Pitrou <solipsis@pitrou.net> parents: 54972 diff changeset	625 case JUMP_IF_FALSE_OR_POP:
fd25030223b0 Untabify C files. Will watch buildbots. Antoine Pitrou <solipsis@pitrou.net> parents: 54972 diff changeset	626 case JUMP_IF_TRUE_OR_POP:
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	627 j = addrmap[GETARG(codestr, i)];
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	628 SETARG(codestr, i, j);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	629 break;
39600 5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	630
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	631 case FOR_ITER:
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	632 case JUMP_FORWARD:
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	633 case SETUP_LOOP:
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	634 case SETUP_EXCEPT:
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	635 case SETUP_FINALLY:
61463 fd25030223b0 Untabify C files. Will watch buildbots. Antoine Pitrou <solipsis@pitrou.net> parents: 54972 diff changeset	636 case SETUP_WITH:
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	637 j = addrmap[GETARG(codestr, i) + i + 3] - addrmap[i] - 3;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	638 SETARG(codestr, i, j);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	639 break;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	640 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	641 adj = CODESIZE(opcode);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	642 while (adj--)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	643 codestr[h++] = codestr[i++];
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	644 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	645 assert(h + nops == codelen);
39600 5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	646
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	647 code = PyString_FromStringAndSize((char *)codestr, h);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	648 PyMem_Free(addrmap);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	649 PyMem_Free(codestr);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	650 PyMem_Free(blocks);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	651 return code;
39600 5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	652
56830 97d7cd365dd5 Merged revisions 73206,73232,73299,73683,74020,74185,74544,74643,74647,74817,74838-74839,74865,74946,75402,75459,75604,75696 via svnmerge from Georg Brandl <georg@python.org> parents: 47527 diff changeset	653 exitError:
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	654 code = NULL;
56830 97d7cd365dd5 Merged revisions 73206,73232,73299,73683,74020,74185,74544,74643,74647,74817,74838-74839,74865,74946,75402,75459,75604,75696 via svnmerge from Georg Brandl <georg@python.org> parents: 47527 diff changeset	655
39600 5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	656 exitUnchanged:
61465 e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	657 if (blocks != NULL)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	658 PyMem_Free(blocks);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	659 if (addrmap != NULL)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	660 PyMem_Free(addrmap);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	661 if (codestr != NULL)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	662 PyMem_Free(codestr);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	663 Py_XINCREF(code);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from Antoine Pitrou <solipsis@pitrou.net> parents: 56830 diff changeset	664 return code;
39600 5e143944770b Move peephole optimizer to separate file. Jeremy Hylton <jeremy@alum.mit.edu> parents: diff changeset	665 }

Mercurial > cpython-lru_cache-weakref

annotate Python/peephole.c @ 80661:94de77bd0b4b 2.7