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Teach StackSlotColoring to update MachineMemOperands when 

changing the stack slots on an instruction, to keep them
consistent with the actual memory addresses.

llvm-svn: 60584
This commit is contained in:
Dan Gohman 2008-12-05 05:31:14 +00:00
parent c1dee225d0
commit 9bb56443a1
1 changed files with 20 additions and 3 deletions
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23
llvm/lib/CodeGen/StackSlotColoring.cpp
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@ -15,6 +15,7 @@
#include "llvm/CodeGen/Passes.h"
#include "llvm/CodeGen/LiveStackAnalysis.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/PseudoSourceValue.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Compiler.h"
#include "llvm/Support/Debug.h"
@ -225,10 +226,26 @@ bool StackSlotColoring::ColorSlots(MachineFunction &MF) {
int FI = MO.getIndex();
if (FI < 0)
continue;
FI = SlotMapping[FI];
if (FI == -1)
int NewFI = SlotMapping[FI];
if (NewFI == -1)
continue;
MO.setIndex(FI);
MO.setIndex(NewFI);
// Update the MachineMemOperand for the new memory location.
// FIXME: We need a better method of managing these too.
SmallVector<MachineMemOperand, 2> MMOs(MI.memoperands_begin(),
MI.memoperands_end());
MI.clearMemOperands(MF);
const Value *OldSV = PseudoSourceValue::getFixedStack(FI);
for (unsigned i = 0, e = MMOs.size(); i != e; ++i) {
if (MMOs[i].getValue() == OldSV) {
MachineMemOperand MMO(PseudoSourceValue::getFixedStack(NewFI),
MMOs[i].getFlags(), MMOs[i].getOffset(),
MMOs[i].getSize(), MMOs[i].getAlignment());
MI.addMemOperand(MF, MMO);
} else
MI.addMemOperand(MF, MMOs[i]);
}
}
}
}