mirrors/cpython
1
0
Fork 0
mirror of https://github.com/python/cpython.git synced 2025-09-26 10:19:53 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 8

GH-116422: Tier2 hot/cold splitting (GH-116813)

Browse source 
Splits the "cold" path, deopts and exits, from the "hot" path, reducing the size of most jitted instructions, at the cost of slower exits.
This commit is contained in:
Mark Shannon 2024-03-26 09:35:11 +00:00 • committed by GitHub
parent 61599a48f5
commit bf82f77957
No known key found for this signature in database
GPG key ID: B5690EEEBB952194
21 changed files with 1662 additions and 1003 deletions
Download patch file Download diff file Expand all files Collapse all files

17
Tools/cases_generator/uop_metadata_generator.py
View file

@ -15,10 +15,10 @@ from generators_common import (
write_header,
cflags,
)
from stack import Stack
from cwriter import CWriter
from typing import TextIO
DEFAULT_OUTPUT = ROOT / "Include/internal/pycore_uop_metadata.h"
@ -26,6 +26,7 @@ def generate_names_and_flags(analysis: Analysis, out: CWriter) -> None:
out.emit("extern const uint16_t _PyUop_Flags[MAX_UOP_ID+1];\n")
out.emit("extern const uint8_t _PyUop_Replication[MAX_UOP_ID+1];\n")
out.emit("extern const char * const _PyOpcode_uop_name[MAX_UOP_ID+1];\n\n")
out.emit("extern int _PyUop_num_popped(int opcode, int oparg);\n\n")
out.emit("#ifdef NEED_OPCODE_METADATA\n")
out.emit("const uint16_t _PyUop_Flags[MAX_UOP_ID+1] = {\n")
for uop in analysis.uops.values():
@ -44,6 +45,20 @@ def generate_names_and_flags(analysis: Analysis, out: CWriter) -> None:
if uop.is_viable() and uop.properties.tier != 1:
out.emit(f'[{uop.name}] = "{uop.name}",\n')
out.emit("};\n")
out.emit("int _PyUop_num_popped(int opcode, int oparg)\n{\n")
out.emit("switch(opcode) {\n")
for uop in analysis.uops.values():
if uop.is_viable() and uop.properties.tier != 1:
stack = Stack()
for var in reversed(uop.stack.inputs):
stack.pop(var)
popped = (-stack.base_offset).to_c()
out.emit(f"case {uop.name}:\n")
out.emit(f" return {popped};\n")
out.emit("default:\n")
out.emit(" return -1;\n")
out.emit("}\n")
out.emit("}\n\n")
out.emit("#endif // NEED_OPCODE_METADATA\n\n")