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Avoid spilling stack slots... to stack slots.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23478 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2005-09-27 21:33:12 +00:00
parent f4e6c3a69b
commit 4531371960
1 changed files with 6 additions and 0 deletions
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6
lib/Transforms/Utils/LowerInvoke.cpp
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@ -334,6 +334,12 @@ splitLiveRangesLiveAcrossInvokes(std::vector<InvokeInst*> &Invokes) {
cast<Instruction>(Inst->use_back())->getParent() == BB &&
!isa<PHINode>(Inst->use_back())) continue;
// If this is an alloca in the entry block, it's not a real register
// value.
if (AllocaInst *AI = dyn_cast<AllocaInst>(Inst))
if (isa<ConstantInt>(AI->getArraySize()) && BB == F->begin())
continue;
// Avoid iterator invalidation by copying users to a temporary vector.
std::vector<Instruction*> Users;
for (Value::use_iterator UI = Inst->use_begin(), E = Inst->use_end();