[all-commits] [llvm/llvm-project] eaab1b: [StackColoring] Remap FixedStackPseudoSourceValue ...
Fangrui Song via All-commits
all-commits at lists.llvm.org
Sun Jan 19 22:54:08 PST 2020
Branch: refs/heads/master
Home: https://github.com/llvm/llvm-project
Commit: eaab1bf21e1d6803fd217fe6052537fc33b06837
https://github.com/llvm/llvm-project/commit/eaab1bf21e1d6803fd217fe6052537fc33b06837
Author: Fangrui Song <i at maskray.me>
Date: 2020-01-19 (Sun, 19 Jan 2020)
Changed paths:
M llvm/include/llvm/CodeGen/PseudoSourceValue.h
M llvm/lib/CodeGen/StackColoring.cpp
A llvm/test/CodeGen/PowerPC/stack-coloring-vararg.mir
Log Message:
-----------
[StackColoring] Remap FixedStackPseudoSourceValue frame index referenced by MachineMemOperand
StackColoring::remapInstructions() remaps MachineOperand frame index (e.g. %stack.1 -> %stack.0)
but does not remap FixedStackPseudoSourceValue frame index (e.g. store 4 into %stack.1.ap2.i.i)
referenced by MachineMemoryOperand.
This can cause an assertion failure when LiveDebugValues references a dead stack object.
It is difficult to craft a test case. -g, va_copy and stack-coloring are required.
I can only reproduce it on ppc32.
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