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StackColoring: don't clear an instruction's mem operand if the underlying

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object is a PseudoSourceValue and PseudoSourceValue::isConstant returns true (i.e.,
points to memory that has a constant value).



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181751 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Akira Hatanaka
2013-05-14 01:42:44 +00:00
parent 17a692e7f1
commit dd29df06fa
2 changed files with 44 additions and 0 deletions
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5
lib/CodeGen/StackColoring.cpp
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@ -42,6 +42,7 @@
#include "llvm/CodeGen/MachineMemOperand.h"
#include "llvm/CodeGen/MachineModuleInfo.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/CodeGen/PseudoSourceValue.h"
#include "llvm/CodeGen/SlotIndexes.h"
#include "llvm/DebugInfo.h"
#include "llvm/IR/Function.h"
@ -528,6 +529,10 @@ void StackColoring::remapInstructions(DenseMap<int, int> &SlotRemap) {
if (!V)
continue;
const PseudoSourceValue *PSV = dyn_cast<const PseudoSourceValue>(V);
if (PSV && PSV->isConstant(MFI))
continue;
// Climb up and find the original alloca.
V = GetUnderlyingObject(V);
// If we did not find one, or if the one that we found is not in our