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GH-128914: Remove conditional stack effects from bytecodes.c and the code generators (GH-128918)

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Mark Shannon 2025-01-20 17:09:23 +00:00 • committed by GitHub
parent 0a6412f9cc
commit ab61d3f430
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GPG key ID: B5690EEEBB952194
44 changed files with 1460 additions and 1679 deletions
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31
Tools/cases_generator/stack.py
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@ -24,17 +24,7 @@ def maybe_parenthesize(sym: str) -> str:
def var_size(var: StackItem) -> str:
if var.condition:
# Special case simplifications
if var.condition == "0":
return "0"
elif var.condition == "1":
return var.get_size()
elif var.condition == "oparg & 1" and not var.size:
return f"({var.condition})"
else:
return f"(({var.condition}) ? {var.get_size()} : 0)"
elif var.size:
if var.size:
return var.size
else:
return "1"
@ -90,10 +80,6 @@ class Local:
def name(self) -> str:
return self.item.name
@property
def condition(self) -> str | None:
return self.item.condition
def is_array(self) -> bool:
return self.item.is_array()
@ -274,16 +260,7 @@ class Stack:
self.defined.add(var.name)
cast = f"({var.type})" if (not indirect and var.type) else ""
bits = ".bits" if cast and self.extract_bits else ""
assign = f"{var.name} = {cast}{indirect}stack_pointer[{self.base_offset.to_c()}]{bits};"
if var.condition:
if var.condition == "1":
assign = f"{assign}\n"
elif var.condition == "0":
return "", Local.unused(var)
else:
assign = f"if ({var.condition}) {{ {assign} }}\n"
else:
assign = f"{assign}\n"
assign = f"{var.name} = {cast}{indirect}stack_pointer[{self.base_offset.to_c()}]{bits};\n"
return assign, Local.from_memory(var)
def push(self, var: Local) -> None:
@ -303,10 +280,6 @@ class Stack:
) -> None:
cast = f"({cast_type})" if var.type else ""
bits = ".bits" if cast and extract_bits else ""
if var.condition == "0":
return
if var.condition and var.condition != "1":
out.emit(f"if ({var.condition}) ")
out.emit(f"stack_pointer[{base_offset.to_c()}]{bits} = {cast}{var.name};\n")
def _adjust_stack_pointer(self, out: CWriter, number: str) -> None: