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Add an assertion that the frame index is indeed inside the declared lifetime region.

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llvm-svn: 163495
This commit is contained in:
Nadav Rotem 2012-09-10 08:44:15 +00:00
parent 8442a2ec90
commit 917505e474
1 changed files with 16 additions and 0 deletions
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16
lib/CodeGen/StackColoring.cpp
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@ -454,6 +454,11 @@ void StackColoring::remapInstructions(DenseMap<int, int> &SlotRemap) {
for (BB = MF->begin(), BBE = MF->end(); BB != BBE; ++BB)
for (I = BB->begin(), IE = BB->end(); I != IE; ++I) {
// Skip lifetime markers. We'll remove them soon.
if (I->getOpcode() == TargetOpcode::LIFETIME_START ||
I->getOpcode() == TargetOpcode::LIFETIME_END)
continue;
// Update the MachineMemOperand to use the new alloca.
for (MachineInstr::mmo_iterator MM = I->memoperands_begin(),
E = I->memoperands_end(); MM != E; ++MM) {
@ -491,6 +496,17 @@ void StackColoring::remapInstructions(DenseMap<int, int> &SlotRemap) {
if (!SlotRemap.count(FromSlot))
continue;
// In a debug build, check that the instruction that we are check is
// inside its expected live range. If the instruction is not inside
// the calculated range then it means that the alloca usage moved
// outside of the lifetime markers.
#ifndef NDEBUG
SlotIndex Index = Indexes->getInstructionIndex(I);
LiveInterval* Interval = Intervals[FromSlot];
assert(Interval->find(Index) != Interval->end() &&
"Found instruction usage outside of live range.");
#endif
// Fix the machine instructions.
int ToSlot = SlotRemap[FromSlot];
MO.setIndex(ToSlot);