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gh-87092: move assembler related code from compile.c to assemble.c (#103277)

This commit is contained in:
Irit Katriel 2023-04-11 11:15:09 +01:00 committed by GitHub
parent 78b763f630
commit 33822d037a
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
10 changed files with 853 additions and 751 deletions
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39
Include/internal/pycore_compile.h
View File

@ -33,6 +33,45 @@ extern int _PyAST_Optimize(
struct _arena *arena,
_PyASTOptimizeState *state);
typedef struct {
int i_opcode;
int i_oparg;
_PyCompilerSrcLocation i_loc;
} _PyCompilerInstruction;
typedef struct {
_PyCompilerInstruction *s_instrs;
int s_allocated;
int s_used;
int *s_labelmap; /* label id --> instr offset */
int s_labelmap_size;
int s_next_free_label; /* next free label id */
} _PyCompile_InstructionSequence;
typedef struct {
PyObject *u_name;
PyObject *u_qualname; /* dot-separated qualified name (lazy) */
/* The following fields are dicts that map objects to
the index of them in co_XXX. The index is used as
the argument for opcodes that refer to those collections.
*/
PyObject *u_consts; /* all constants */
PyObject *u_names; /* all names */
PyObject *u_varnames; /* local variables */
PyObject *u_cellvars; /* cell variables */
PyObject *u_freevars; /* free variables */
Py_ssize_t u_argcount; /* number of arguments for block */
Py_ssize_t u_posonlyargcount; /* number of positional only arguments for block */
Py_ssize_t u_kwonlyargcount; /* number of keyword only arguments for block */
int u_firstlineno; /* the first lineno of the block */
} _PyCompile_CodeUnitMetadata;
/* Utility for a number of growing arrays used in the compiler */
int _PyCompile_EnsureArrayLargeEnough(
int idx,

11
Include/internal/pycore_flowgraph.h
View File

@ -9,6 +9,7 @@ extern "C" {
#endif
#include "pycore_opcode_utils.h"
#include "pycore_compile.h"
static const _PyCompilerSrcLocation NO_LOCATION = {-1, -1, -1, -1};
@ -33,7 +34,8 @@ typedef struct {
typedef struct _PyCfgBasicblock_ {
/* Each basicblock in a compilation unit is linked via b_list in the
reverse order that the block are allocated. b_list points to the next
block, not to be confused with b_next, which is next by control flow. */
block in this list, not to be confused with b_next, which is next by
control flow. */
struct _PyCfgBasicblock_ *b_list;
/* The label of this block if it is a jump target, -1 otherwise */
_PyCfgJumpTargetLabel b_label;
@ -91,10 +93,9 @@ void _PyCfgBuilder_Fini(_PyCfgBuilder *g);
_PyCfgInstruction* _PyCfg_BasicblockLastInstr(const _PyCfgBasicblock *b);
int _PyCfg_OptimizeCodeUnit(_PyCfgBuilder *g, PyObject *consts, PyObject *const_cache,
int code_flags, int nlocals, int nparams);
int code_flags, int nlocals, int nparams, int firstlineno);
int _PyCfg_Stackdepth(_PyCfgBasicblock *entryblock, int code_flags);
void _PyCfg_ConvertExceptionHandlersToNops(_PyCfgBasicblock *entryblock);
int _PyCfg_ResolveLineNumbers(_PyCfgBuilder *g, int firstlineno);
int _PyCfg_ResolveJumps(_PyCfgBuilder *g);
int _PyCfg_InstrSize(_PyCfgInstruction *instruction);
@ -110,6 +111,10 @@ basicblock_nofallthrough(const _PyCfgBasicblock *b) {
#define BB_NO_FALLTHROUGH(B) (basicblock_nofallthrough(B))
#define BB_HAS_FALLTHROUGH(B) (!basicblock_nofallthrough(B))
PyCodeObject *
_PyAssemble_MakeCodeObject(_PyCompile_CodeUnitMetadata *u, PyObject *const_cache,
PyObject *consts, int maxdepth, _PyCfgBasicblock *entryblock,
int nlocalsplus, int code_flags, PyObject *filename);
#ifdef __cplusplus
}

3
Makefile.pre.in
View File

@ -369,17 +369,18 @@ PYTHON_OBJS= \
Python/Python-ast.o \
Python/Python-tokenize.o \
Python/asdl.o \
Python/assemble.o \
Python/ast.o \
Python/ast_opt.o \
Python/ast_unparse.o \
Python/bltinmodule.o \
Python/ceval.o \
Python/flowgraph.o \
Python/codecs.o \
Python/compile.o \
Python/context.o \
Python/dynamic_annotations.o \
Python/errors.o \
Python/flowgraph.o \
Python/frame.o \
Python/frozenmain.o \
Python/future.o \

3
PCbuild/_freeze_module.vcxproj
View File

@ -177,13 +177,13 @@
<ClCompile Include="..\PC\winreg.c" />
<ClCompile Include="..\Python\_warnings.c" />
<ClCompile Include="..\Python\asdl.c" />
<ClCompile Include="..\Python\assemble.c" />
<ClCompile Include="..\Python\ast.c" />
<ClCompile Include="..\Python\ast_opt.c" />
<ClCompile Include="..\Python\ast_unparse.c" />
<ClCompile Include="..\Python\bltinmodule.c" />
<ClCompile Include="..\Python\bootstrap_hash.c" />
<ClCompile Include="..\Python\ceval.c" />
<ClCompile Include="..\Python\flowgraph.c" />
<ClCompile Include="..\Python\codecs.c" />
<ClCompile Include="..\Python\compile.c" />
<ClCompile Include="..\Python\context.c" />
@ -192,6 +192,7 @@
<ClCompile Include="..\Python\dynload_win.c" />
<ClCompile Include="..\Python\errors.c" />
<ClCompile Include="..\Python\fileutils.c" />
<ClCompile Include="..\Python\flowgraph.c" />
<ClCompile Include="..\Python\formatter_unicode.c" />
<ClCompile Include="..\Python\frame.c" />
<ClCompile Include="..\Python\future.c" />

9
PCbuild/_freeze_module.vcxproj.filters
View File

@ -28,6 +28,9 @@
<ClCompile Include="..\Python\asdl.c">
<Filter>Source Files</Filter>
</ClCompile>
<ClCompile Include="..\Python\assemble.c">
<Filter>Source Files</Filter>
</ClCompile>
<ClCompile Include="..\Python\ast.c">
<Filter>Source Files</Filter>
</ClCompile>
@ -76,9 +79,6 @@
<ClCompile Include="..\Python\ceval.c">
<Filter>Source Files</Filter>
</ClCompile>
<ClCompile Include="..\Python\flowgraph.c">
<Filter>Source Files</Filter>
</ClCompile>
<ClCompile Include="..\Objects\classobject.c">
<Filter>Source Files</Filter>
</ClCompile>
@ -142,6 +142,9 @@
<ClCompile Include="..\Objects\floatobject.c">
<Filter>Source Files</Filter>
</ClCompile>
<ClCompile Include="..\Python\flowgraph.c">
<Filter>Source Files</Filter>
</ClCompile>
<ClCompile Include="..\Python\formatter_unicode.c">
<Filter>Source Files</Filter>
</ClCompile>

3
PCbuild/pythoncore.vcxproj
View File

@ -500,13 +500,13 @@
<ClCompile Include="..\Python\pyhash.c" />
<ClCompile Include="..\Python\_warnings.c" />
<ClCompile Include="..\Python\asdl.c" />
<ClCompile Include="..\Python\assemble.c" />
<ClCompile Include="..\Python\ast.c" />
<ClCompile Include="..\Python\ast_opt.c" />
<ClCompile Include="..\Python\ast_unparse.c" />
<ClCompile Include="..\Python\bltinmodule.c" />
<ClCompile Include="..\Python\bootstrap_hash.c" />
<ClCompile Include="..\Python\ceval.c" />
<ClCompile Include="..\Python\flowgraph.c" />
<ClCompile Include="..\Python\codecs.c" />
<ClCompile Include="..\Python\compile.c" />
<ClCompile Include="..\Python\context.c" />
@ -514,6 +514,7 @@
<ClCompile Include="..\Python\dynload_win.c" />
<ClCompile Include="..\Python\errors.c" />
<ClCompile Include="..\Python\fileutils.c" />
<ClCompile Include="..\Python\flowgraph.c" />
<ClCompile Include="..\Python\formatter_unicode.c" />
<ClCompile Include="..\Python\frame.c" />
<ClCompile Include="..\Python\frozen.c" />

9
PCbuild/pythoncore.vcxproj.filters
View File

@ -1094,6 +1094,9 @@
<ClCompile Include="..\Python\asdl.c">
<Filter>Python</Filter>
</ClCompile>
<ClCompile Include="..\Python\assemble.c">
<Filter>Python</Filter>
</ClCompile>
<ClCompile Include="..\Python\ast.c">
<Filter>Python</Filter>
</ClCompile>
@ -1109,9 +1112,6 @@
<ClCompile Include="..\Python\ceval.c">
<Filter>Python</Filter>
</ClCompile>
<ClCompile Include="..\Python\flowgraph.c">
<Filter>Python</Filter>
</ClCompile>
<ClCompile Include="..\Python\codecs.c">
<Filter>Python</Filter>
</ClCompile>
@ -1130,6 +1130,9 @@
<ClCompile Include="..\Python\fileutils.c">
<Filter>Python</Filter>
</ClCompile>
<ClCompile Include="..\Python\flowgraph.c">
<Filter>Python</Filter>
</ClCompile>
<ClCompile Include="..\Python\formatter_unicode.c">
<Filter>Python</Filter>
</ClCompile>

602
Python/assemble.c Normal file
View File

@ -0,0 +1,602 @@
#include <stdbool.h>
#include "Python.h"
#include "pycore_flowgraph.h"
#include "pycore_compile.h"
#include "pycore_pymem.h" // _PyMem_IsPtrFreed()
#include "pycore_code.h" // write_location_entry_start()
#define DEFAULT_CODE_SIZE 128
#define DEFAULT_LNOTAB_SIZE 16
#define DEFAULT_CNOTAB_SIZE 32
#undef SUCCESS
#undef ERROR
#define SUCCESS 0
#define ERROR -1
#define RETURN_IF_ERROR(X) \
if ((X) == -1) { \
return ERROR; \
}
typedef _PyCompilerSrcLocation location;
typedef _PyCfgInstruction cfg_instr;
typedef _PyCfgBasicblock basicblock;
static inline bool
same_location(location a, location b)
{
return a.lineno == b.lineno &&
a.end_lineno == b.end_lineno &&
a.col_offset == b.col_offset &&
a.end_col_offset == b.end_col_offset;
}
struct assembler {
PyObject *a_bytecode; /* bytes containing bytecode */
int a_offset; /* offset into bytecode */
PyObject *a_except_table; /* bytes containing exception table */
int a_except_table_off; /* offset into exception table */
/* Location Info */
int a_lineno; /* lineno of last emitted instruction */
PyObject* a_linetable; /* bytes containing location info */
int a_location_off; /* offset of last written location info frame */
};
static int
assemble_init(struct assembler *a, int firstlineno)
{
memset(a, 0, sizeof(struct assembler));
a->a_lineno = firstlineno;
a->a_linetable = NULL;
a->a_location_off = 0;
a->a_except_table = NULL;
a->a_bytecode = PyBytes_FromStringAndSize(NULL, DEFAULT_CODE_SIZE);
if (a->a_bytecode == NULL) {
goto error;
}
a->a_linetable = PyBytes_FromStringAndSize(NULL, DEFAULT_CNOTAB_SIZE);
if (a->a_linetable == NULL) {
goto error;
}
a->a_except_table = PyBytes_FromStringAndSize(NULL, DEFAULT_LNOTAB_SIZE);
if (a->a_except_table == NULL) {
goto error;
}
return SUCCESS;
error:
Py_XDECREF(a->a_bytecode);
Py_XDECREF(a->a_linetable);
Py_XDECREF(a->a_except_table);
return ERROR;
}
static void
assemble_free(struct assembler *a)
{
Py_XDECREF(a->a_bytecode);
Py_XDECREF(a->a_linetable);
Py_XDECREF(a->a_except_table);
}
static inline void
write_except_byte(struct assembler *a, int byte) {
unsigned char *p = (unsigned char *) PyBytes_AS_STRING(a->a_except_table);
p[a->a_except_table_off++] = byte;
}
#define CONTINUATION_BIT 64
static void
assemble_emit_exception_table_item(struct assembler *a, int value, int msb)
{
assert ((msb | 128) == 128);
assert(value >= 0 && value < (1 << 30));
if (value >= 1 << 24) {
write_except_byte(a, (value >> 24) | CONTINUATION_BIT | msb);
msb = 0;
}
if (value >= 1 << 18) {
write_except_byte(a, ((value >> 18)&0x3f) | CONTINUATION_BIT | msb);
msb = 0;
}
if (value >= 1 << 12) {
write_except_byte(a, ((value >> 12)&0x3f) | CONTINUATION_BIT | msb);
msb = 0;
}
if (value >= 1 << 6) {
write_except_byte(a, ((value >> 6)&0x3f) | CONTINUATION_BIT | msb);
msb = 0;
}
write_except_byte(a, (value&0x3f) | msb);
}
/* See Objects/exception_handling_notes.txt for details of layout */
#define MAX_SIZE_OF_ENTRY 20
static int
assemble_emit_exception_table_entry(struct assembler *a, int start, int end, basicblock *handler)
{
Py_ssize_t len = PyBytes_GET_SIZE(a->a_except_table);
if (a->a_except_table_off + MAX_SIZE_OF_ENTRY >= len) {
RETURN_IF_ERROR(_PyBytes_Resize(&a->a_except_table, len * 2));
}
int size = end-start;
assert(end > start);
int target = handler->b_offset;
int depth = handler->b_startdepth - 1;
if (handler->b_preserve_lasti) {
depth -= 1;
}
assert(depth >= 0);
int depth_lasti = (depth<<1) | handler->b_preserve_lasti;
assemble_emit_exception_table_item(a, start, (1<<7));
assemble_emit_exception_table_item(a, size, 0);
assemble_emit_exception_table_item(a, target, 0);
assemble_emit_exception_table_item(a, depth_lasti, 0);
return SUCCESS;
}
static int
assemble_exception_table(struct assembler *a, basicblock *entryblock)
{
basicblock *b;
int ioffset = 0;
basicblock *handler = NULL;
int start = -1;
for (b = entryblock; b != NULL; b = b->b_next) {
ioffset = b->b_offset;
for (int i = 0; i < b->b_iused; i++) {
cfg_instr *instr = &b->b_instr[i];
if (instr->i_except != handler) {
if (handler != NULL) {
RETURN_IF_ERROR(
assemble_emit_exception_table_entry(a, start, ioffset, handler));
}
start = ioffset;
handler = instr->i_except;
}
ioffset += _PyCfg_InstrSize(instr);
}
}
if (handler != NULL) {
RETURN_IF_ERROR(assemble_emit_exception_table_entry(a, start, ioffset, handler));
}
return SUCCESS;
}
/* Code location emitting code. See locations.md for a description of the format. */
#define MSB 0x80
static void
write_location_byte(struct assembler* a, int val)
{
PyBytes_AS_STRING(a->a_linetable)[a->a_location_off] = val&255;
a->a_location_off++;
}
static uint8_t *
location_pointer(struct assembler* a)
{
return (uint8_t *)PyBytes_AS_STRING(a->a_linetable) +
a->a_location_off;
}
static void
write_location_first_byte(struct assembler* a, int code, int length)
{
a->a_location_off += write_location_entry_start(
location_pointer(a), code, length);
}
static void
write_location_varint(struct assembler* a, unsigned int val)
{
uint8_t *ptr = location_pointer(a);
a->a_location_off += write_varint(ptr, val);
}
static void
write_location_signed_varint(struct assembler* a, int val)
{
uint8_t *ptr = location_pointer(a);
a->a_location_off += write_signed_varint(ptr, val);
}
static void
write_location_info_short_form(struct assembler* a, int length, int column, int end_column)
{
assert(length > 0 && length <= 8);
int column_low_bits = column & 7;
int column_group = column >> 3;
assert(column < 80);
assert(end_column >= column);
assert(end_column - column < 16);
write_location_first_byte(a, PY_CODE_LOCATION_INFO_SHORT0 + column_group, length);
write_location_byte(a, (column_low_bits << 4) | (end_column - column));
}
static void
write_location_info_oneline_form(struct assembler* a, int length, int line_delta, int column, int end_column)
{
assert(length > 0 && length <= 8);
assert(line_delta >= 0 && line_delta < 3);
assert(column < 128);
assert(end_column < 128);
write_location_first_byte(a, PY_CODE_LOCATION_INFO_ONE_LINE0 + line_delta, length);
write_location_byte(a, column);
write_location_byte(a, end_column);
}
static void
write_location_info_long_form(struct assembler* a, location loc, int length)
{
assert(length > 0 && length <= 8);
write_location_first_byte(a, PY_CODE_LOCATION_INFO_LONG, length);
write_location_signed_varint(a, loc.lineno - a->a_lineno);
assert(loc.end_lineno >= loc.lineno);
write_location_varint(a, loc.end_lineno - loc.lineno);
write_location_varint(a, loc.col_offset + 1);
write_location_varint(a, loc.end_col_offset + 1);
}
static void
write_location_info_none(struct assembler* a, int length)
{
write_location_first_byte(a, PY_CODE_LOCATION_INFO_NONE, length);
}
static void
write_location_info_no_column(struct assembler* a, int length, int line_delta)
{
write_location_first_byte(a, PY_CODE_LOCATION_INFO_NO_COLUMNS, length);
write_location_signed_varint(a, line_delta);
}
#define THEORETICAL_MAX_ENTRY_SIZE 25 /* 1 + 6 + 6 + 6 + 6 */
static int
write_location_info_entry(struct assembler* a, location loc, int isize)
{
Py_ssize_t len = PyBytes_GET_SIZE(a->a_linetable);
if (a->a_location_off + THEORETICAL_MAX_ENTRY_SIZE >= len) {
assert(len > THEORETICAL_MAX_ENTRY_SIZE);
RETURN_IF_ERROR(_PyBytes_Resize(&a->a_linetable, len*2));
}
if (loc.lineno < 0) {
write_location_info_none(a, isize);
return SUCCESS;
}
int line_delta = loc.lineno - a->a_lineno;
int column = loc.col_offset;
int end_column = loc.end_col_offset;
assert(column >= -1);
assert(end_column >= -1);
if (column < 0 || end_column < 0) {
if (loc.end_lineno == loc.lineno || loc.end_lineno == -1) {
write_location_info_no_column(a, isize, line_delta);
a->a_lineno = loc.lineno;
return SUCCESS;
}
}
else if (loc.end_lineno == loc.lineno) {
if (line_delta == 0 && column < 80 && end_column - column < 16 && end_column >= column) {
write_location_info_short_form(a, isize, column, end_column);
return SUCCESS;
}
if (line_delta >= 0 && line_delta < 3 && column < 128 && end_column < 128) {
write_location_info_oneline_form(a, isize, line_delta, column, end_column);
a->a_lineno = loc.lineno;
return SUCCESS;
}
}
write_location_info_long_form(a, loc, isize);
a->a_lineno = loc.lineno;
return SUCCESS;
}
static int
assemble_emit_location(struct assembler* a, location loc, int isize)
{
if (isize == 0) {
return SUCCESS;
}
while (isize > 8) {
RETURN_IF_ERROR(write_location_info_entry(a, loc, 8));
isize -= 8;
}
return write_location_info_entry(a, loc, isize);
}
static int
assemble_location_info(struct assembler *a, basicblock *entryblock, int firstlineno)
{
a->a_lineno = firstlineno;
location loc = NO_LOCATION;
int size = 0;
for (basicblock *b = entryblock; b != NULL; b = b->b_next) {
for (int j = 0; j < b->b_iused; j++) {
if (!same_location(loc, b->b_instr[j].i_loc)) {
RETURN_IF_ERROR(assemble_emit_location(a, loc, size));
loc = b->b_instr[j].i_loc;
size = 0;
}
size += _PyCfg_InstrSize(&b->b_instr[j]);
}
}
RETURN_IF_ERROR(assemble_emit_location(a, loc, size));
return SUCCESS;
}
static void
write_instr(_Py_CODEUNIT *codestr, cfg_instr *instruction, int ilen)
{
int opcode = instruction->i_opcode;
assert(!IS_PSEUDO_OPCODE(opcode));
int oparg = instruction->i_oparg;
assert(HAS_ARG(opcode) || oparg == 0);
int caches = _PyOpcode_Caches[opcode];
switch (ilen - caches) {
case 4:
codestr->op.code = EXTENDED_ARG;
codestr->op.arg = (oparg >> 24) & 0xFF;
codestr++;
/* fall through */
case 3:
codestr->op.code = EXTENDED_ARG;
codestr->op.arg = (oparg >> 16) & 0xFF;
codestr++;
/* fall through */
case 2:
codestr->op.code = EXTENDED_ARG;
codestr->op.arg = (oparg >> 8) & 0xFF;
codestr++;
/* fall through */
case 1:
codestr->op.code = opcode;
codestr->op.arg = oparg & 0xFF;
codestr++;
break;
default:
Py_UNREACHABLE();
}
while (caches--) {
codestr->op.code = CACHE;
codestr->op.arg = 0;
codestr++;
}
}
/* assemble_emit_instr()
Extend the bytecode with a new instruction.
Update lnotab if necessary.
*/
static int
assemble_emit_instr(struct assembler *a, cfg_instr *i)
{
Py_ssize_t len = PyBytes_GET_SIZE(a->a_bytecode);
_Py_CODEUNIT *code;
int size = _PyCfg_InstrSize(i);
if (a->a_offset + size >= len / (int)sizeof(_Py_CODEUNIT)) {
if (len > PY_SSIZE_T_MAX / 2) {
return ERROR;
}
RETURN_IF_ERROR(_PyBytes_Resize(&a->a_bytecode, len * 2));
}
code = (_Py_CODEUNIT *)PyBytes_AS_STRING(a->a_bytecode) + a->a_offset;
a->a_offset += size;
write_instr(code, i, size);
return SUCCESS;
}
static int
assemble_emit(struct assembler *a, basicblock *entryblock, int first_lineno,
PyObject *const_cache)
{
RETURN_IF_ERROR(assemble_init(a, first_lineno));
for (basicblock *b = entryblock; b != NULL; b = b->b_next) {
for (int j = 0; j < b->b_iused; j++) {
RETURN_IF_ERROR(assemble_emit_instr(a, &b->b_instr[j]));
}
}
RETURN_IF_ERROR(assemble_location_info(a, entryblock, a->a_lineno));
RETURN_IF_ERROR(assemble_exception_table(a, entryblock));
RETURN_IF_ERROR(_PyBytes_Resize(&a->a_except_table, a->a_except_table_off));
RETURN_IF_ERROR(_PyCompile_ConstCacheMergeOne(const_cache, &a->a_except_table));
RETURN_IF_ERROR(_PyBytes_Resize(&a->a_linetable, a->a_location_off));
RETURN_IF_ERROR(_PyCompile_ConstCacheMergeOne(const_cache, &a->a_linetable));
RETURN_IF_ERROR(_PyBytes_Resize(&a->a_bytecode, a->a_offset * sizeof(_Py_CODEUNIT)));
RETURN_IF_ERROR(_PyCompile_ConstCacheMergeOne(const_cache, &a->a_bytecode));
return SUCCESS;
}
static PyObject *
dict_keys_inorder(PyObject *dict, Py_ssize_t offset)
{
PyObject *tuple, *k, *v;
Py_ssize_t i, pos = 0, size = PyDict_GET_SIZE(dict);
tuple = PyTuple_New(size);
if (tuple == NULL)
return NULL;
while (PyDict_Next(dict, &pos, &k, &v)) {
i = PyLong_AS_LONG(v);
assert((i - offset) < size);
assert((i - offset) >= 0);
PyTuple_SET_ITEM(tuple, i - offset, Py_NewRef(k));
}
return tuple;
}
// This is in codeobject.c.
extern void _Py_set_localsplus_info(int, PyObject *, unsigned char,
PyObject *, PyObject *);
static void
compute_localsplus_info(_PyCompile_CodeUnitMetadata *umd, int nlocalsplus,
PyObject *names, PyObject *kinds)
{
PyObject *k, *v;
Py_ssize_t pos = 0;
while (PyDict_Next(umd->u_varnames, &pos, &k, &v)) {
int offset = (int)PyLong_AS_LONG(v);
assert(offset >= 0);
assert(offset < nlocalsplus);
// For now we do not distinguish arg kinds.
_PyLocals_Kind kind = CO_FAST_LOCAL;
if (PyDict_GetItem(umd->u_cellvars, k) != NULL) {
kind |= CO_FAST_CELL;
}
_Py_set_localsplus_info(offset, k, kind, names, kinds);
}
int nlocals = (int)PyDict_GET_SIZE(umd->u_varnames);
// This counter mirrors the fix done in fix_cell_offsets().
int numdropped = 0;
pos = 0;
while (PyDict_Next(umd->u_cellvars, &pos, &k, &v)) {
if (PyDict_GetItem(umd->u_varnames, k) != NULL) {
// Skip cells that are already covered by locals.
numdropped += 1;
continue;
}
int offset = (int)PyLong_AS_LONG(v);
assert(offset >= 0);
offset += nlocals - numdropped;
assert(offset < nlocalsplus);
_Py_set_localsplus_info(offset, k, CO_FAST_CELL, names, kinds);
}
pos = 0;
while (PyDict_Next(umd->u_freevars, &pos, &k, &v)) {
int offset = (int)PyLong_AS_LONG(v);
assert(offset >= 0);
offset += nlocals - numdropped;
assert(offset < nlocalsplus);
_Py_set_localsplus_info(offset, k, CO_FAST_FREE, names, kinds);
}
}
static PyCodeObject *
makecode(_PyCompile_CodeUnitMetadata *umd, struct assembler *a, PyObject *const_cache,
PyObject *constslist, int maxdepth, int nlocalsplus, int code_flags,
PyObject *filename)
{
PyCodeObject *co = NULL;
PyObject *names = NULL;
PyObject *consts = NULL;
PyObject *localsplusnames = NULL;
PyObject *localspluskinds = NULL;
names = dict_keys_inorder(umd->u_names, 0);
if (!names) {
goto error;
}
if (_PyCompile_ConstCacheMergeOne(const_cache, &names) < 0) {
goto error;
}
consts = PyList_AsTuple(constslist); /* PyCode_New requires a tuple */
if (consts == NULL) {
goto error;
}
if (_PyCompile_ConstCacheMergeOne(const_cache, &consts) < 0) {
goto error;
}
assert(umd->u_posonlyargcount < INT_MAX);
assert(umd->u_argcount < INT_MAX);
assert(umd->u_kwonlyargcount < INT_MAX);
int posonlyargcount = (int)umd->u_posonlyargcount;
int posorkwargcount = (int)umd->u_argcount;
assert(INT_MAX - posonlyargcount - posorkwargcount > 0);
int kwonlyargcount = (int)umd->u_kwonlyargcount;
localsplusnames = PyTuple_New(nlocalsplus);
if (localsplusnames == NULL) {
goto error;
}
localspluskinds = PyBytes_FromStringAndSize(NULL, nlocalsplus);
if (localspluskinds == NULL) {
goto error;
}
compute_localsplus_info(umd, nlocalsplus, localsplusnames, localspluskinds);
struct _PyCodeConstructor con = {
.filename = filename,
.name = umd->u_name,
.qualname = umd->u_qualname ? umd->u_qualname : umd->u_name,
.flags = code_flags,
.code = a->a_bytecode,
.firstlineno = umd->u_firstlineno,
.linetable = a->a_linetable,
.consts = consts,
.names = names,
.localsplusnames = localsplusnames,
.localspluskinds = localspluskinds,
.argcount = posonlyargcount + posorkwargcount,
.posonlyargcount = posonlyargcount,
.kwonlyargcount = kwonlyargcount,
.stacksize = maxdepth,
.exceptiontable = a->a_except_table,
};
if (_PyCode_Validate(&con) < 0) {
goto error;
}
if (_PyCompile_ConstCacheMergeOne(const_cache, &localsplusnames) < 0) {
goto error;
}
con.localsplusnames = localsplusnames;
co = _PyCode_New(&con);
if (co == NULL) {
goto error;
}
error:
Py_XDECREF(names);
Py_XDECREF(consts);
Py_XDECREF(localsplusnames);
Py_XDECREF(localspluskinds);
return co;
}
PyCodeObject *
_PyAssemble_MakeCodeObject(_PyCompile_CodeUnitMetadata *umd, PyObject *const_cache,
PyObject *consts, int maxdepth, basicblock *entryblock,
int nlocalsplus, int code_flags, PyObject *filename)
{
PyCodeObject *co = NULL;
struct assembler a;
int res = assemble_emit(&a, entryblock, umd->u_firstlineno, const_cache);
if (res == SUCCESS) {
co = makecode(umd, &a, const_cache, consts, maxdepth, nlocalsplus,
code_flags, filename);
}
assemble_free(&a);
return co;
}

877
Python/compile.c
View File

File diff suppressed because it is too large Load Diff

48
Python/flowgraph.c
View File

@ -1978,28 +1978,6 @@ push_cold_blocks_to_end(cfg_builder *g, int code_flags) {
return SUCCESS;
}
int
_PyCfg_OptimizeCodeUnit(cfg_builder *g, PyObject *consts, PyObject *const_cache,
int code_flags, int nlocals, int nparams)
{
assert(cfg_builder_check(g));
/** Preprocessing **/
/* Map labels to targets and mark exception handlers */
RETURN_IF_ERROR(translate_jump_labels_to_targets(g->g_entryblock));
RETURN_IF_ERROR(mark_except_handlers(g->g_entryblock));
RETURN_IF_ERROR(label_exception_targets(g->g_entryblock));
/** Optimization **/
RETURN_IF_ERROR(optimize_cfg(g, consts, const_cache));
RETURN_IF_ERROR(remove_unused_consts(g->g_entryblock, consts));
RETURN_IF_ERROR(
add_checks_for_loads_of_uninitialized_variables(
g->g_entryblock, nlocals, nparams));
RETURN_IF_ERROR(push_cold_blocks_to_end(g, code_flags));
return SUCCESS;
}
void
_PyCfg_ConvertExceptionHandlersToNops(basicblock *entryblock)
{
@ -2149,8 +2127,8 @@ guarantee_lineno_for_exits(basicblock *entryblock, int firstlineno) {
}
}
int
_PyCfg_ResolveLineNumbers(cfg_builder *g, int firstlineno)
static int
resolve_line_numbers(cfg_builder *g, int firstlineno)
{
RETURN_IF_ERROR(duplicate_exits_without_lineno(g));
propagate_line_numbers(g->g_entryblock);
@ -2158,3 +2136,25 @@ _PyCfg_ResolveLineNumbers(cfg_builder *g, int firstlineno)
return SUCCESS;
}
int
_PyCfg_OptimizeCodeUnit(cfg_builder *g, PyObject *consts, PyObject *const_cache,
int code_flags, int nlocals, int nparams, int firstlineno)
{
assert(cfg_builder_check(g));
/** Preprocessing **/
/* Map labels to targets and mark exception handlers */
RETURN_IF_ERROR(translate_jump_labels_to_targets(g->g_entryblock));
RETURN_IF_ERROR(mark_except_handlers(g->g_entryblock));
RETURN_IF_ERROR(label_exception_targets(g->g_entryblock));
/** Optimization **/
RETURN_IF_ERROR(optimize_cfg(g, consts, const_cache));
RETURN_IF_ERROR(remove_unused_consts(g->g_entryblock, consts));
RETURN_IF_ERROR(
add_checks_for_loads_of_uninitialized_variables(
g->g_entryblock, nlocals, nparams));
RETURN_IF_ERROR(push_cold_blocks_to_end(g, code_flags));
RETURN_IF_ERROR(resolve_line_numbers(g, firstlineno));
return SUCCESS;
}