mirrors/cpython
1
0
Fork 0
mirror of https://github.com/python/cpython.git synced 2025-07-08 03:45:36 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 8

GH-111646: Simplify optimizer, by compacting uops when making executor. (GH-111647)

Browse source
This commit is contained in:
Mark Shannon 2023-11-06 11:28:52 +00:00 • committed by GitHub
parent c8faa3568a
commit d78c872e0d
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
2 changed files with 119 additions and 117 deletions
Download patch file Download diff file Expand all files Collapse all files

35
Python/optimizer_analysis.c
View file

@ -13,13 +13,42 @@
#include "pycore_optimizer.h"
static void
remove_unneeded_uops(_PyUOpInstruction *buffer, int buffer_size)
{
// Note that we don't enter stubs, those SET_IPs are needed.
int last_set_ip = -1;
bool need_ip = true;
for (int pc = 0; pc < buffer_size; pc++) {
int opcode = buffer[pc].opcode;
if (opcode == _SET_IP) {
if (!need_ip && last_set_ip >= 0) {
buffer[last_set_ip].opcode = NOP;
}
need_ip = false;
last_set_ip = pc;
}
else if (opcode == _JUMP_TO_TOP || opcode == _EXIT_TRACE) {
break;
}
else {
// If opcode has ERROR or DEOPT, set need_ip to true
if (_PyOpcode_opcode_metadata[opcode].flags & (HAS_ERROR_FLAG | HAS_DEOPT_FLAG) || opcode == _PUSH_FRAME) {
need_ip = true;
}
}
}
}
int
_Py_uop_analyze_and_optimize(
PyCodeObject *co,
_PyUOpInstruction *trace,
int trace_len,
_PyUOpInstruction *buffer,
int buffer_size,
int curr_stacklen
)
{
return trace_len;
remove_unneeded_uops(buffer, buffer_size);
return 0;
}