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Fix another case where debug info interferes with

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an optimization.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@66288 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dale Johannesen 2009-03-06 21:08:33 +00:00
parent 2ee7f8381f
commit 3a56d14641
1 changed files with 6 additions and 2 deletions
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8
lib/Transforms/Utils/SimplifyCFG.cpp
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@ -385,7 +385,7 @@ static bool DominatesMergePoint(Value *V, BasicBlock *BB,
// only uses stuff defined outside of the condition. If so, hoist it out.
switch (I->getOpcode()) {
default: return false; // Cannot hoist this out safely.
case Instruction::Load:
case Instruction::Load: {
// We can hoist loads that are non-volatile and obviously cannot trap.
if (cast<LoadInst>(I)->isVolatile())
return false;
@ -397,9 +397,13 @@ static bool DominatesMergePoint(Value *V, BasicBlock *BB,
// Finally, we have to check to make sure there are no instructions
// before the load in its basic block, as we are going to hoist the loop
// out to its predecessor.
if (PBB->begin() != BasicBlock::iterator(I))
BasicBlock::iterator IP = PBB->begin();
while (isa<DbgInfoIntrinsic>(IP))
IP++;
if (IP != BasicBlock::iterator(I))
return false;
break;
}
case Instruction::Add:
case Instruction::Sub:
case Instruction::And: