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Code Issues Projects Releases Packages Wiki Activity Actions 11

GH-131729: Code-gen better liveness analysis (GH-131732)

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* Rename 'defined' attribute to 'in_local' to more accurately reflect how it is used

* Make death of variables explicit even for array variables.

* Convert in_memory from boolean to stack offset

* Don't apply liveness analysis to optimizer generated code

* Fix RETURN_VALUE in optimizer
This commit is contained in:
Mark Shannon 2025-03-26 15:21:35 +00:00 • committed by GitHub
parent b9ca438daa
commit 1b8bb1ed0c
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12 changed files with 344 additions and 399 deletions
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19
Tools/cases_generator/generators_common.py
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@ -248,6 +248,7 @@ class Emitter:
except Exception as ex:
ex.args = (ex.args[0] + str(tkn),)
raise
self._print_storage(storage)
return True
def kill_inputs(
@ -303,7 +304,7 @@ class Emitter:
f"'{live}' is still live", name)
var.kill()
break
if var.defined:
if var.in_local:
live = var.name
return True
@ -402,6 +403,7 @@ class Emitter:
self.out.emit(")")
def emit_save(self, storage: Storage) -> None:
storage.flush(self.out)
storage.save(self.out)
self._print_storage(storage)
@ -498,6 +500,9 @@ class Emitter:
else:
if PRINT_STACKS:
self.emit("/* Merge */\n")
self.out.emit(if_storage.as_comment())
self.out.emit("\n")
self.out.emit(else_storage.as_comment())
else_storage.merge(if_storage, self.out)
storage = else_storage
self._print_storage(storage)
@ -513,7 +518,7 @@ class Emitter:
reachable = True
except StackError as ex:
self._print_storage(if_storage)
raise analysis_error(ex.args[0], rbrace) # from None
raise analysis_error(ex.args[0], rbrace) from None
return reachable, rbrace, storage
def _emit_block(
@ -577,16 +582,16 @@ class Emitter:
if tkn in local_stores:
for var in storage.inputs:
if var.name == tkn.text:
if var.defined or var.in_memory:
if var.in_local or var.in_memory():
msg = f"Cannot assign to already defined input variable '{tkn.text}'"
raise analysis_error(msg, tkn)
var.defined = True
var.in_memory = False
var.in_local = True
var.memory_offset = None
break
for var in storage.outputs:
if var.name == tkn.text:
var.defined = True
var.in_memory = False
var.in_local = True
var.memory_offset = None
break
if tkn.text.startswith("DISPATCH"):
self._print_storage(storage)