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Fix a debug info dependency in jump threading.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67064 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dale Johannesen 2009-03-17 00:38:24 +00:00
parent 89a66a96fe
commit 6b23339502
1 changed files with 5 additions and 2 deletions
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7
lib/Transforms/Scalar/JumpThreading.cpp
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@ -432,10 +432,13 @@ bool JumpThreading::ProcessSwitchOnDuplicateCond(BasicBlock *PredBB,
// If DESTBB *just* contains the switch, then we can forward edges from PREDBB
// directly to their destination. This does not introduce *any* code size
// growth.
// growth. Skip debug info first.
BasicBlock::iterator BBI = DestBB->begin();
while (isa<DbgInfoIntrinsic>(BBI))
BBI++;
// FIXME: Thread if it just contains a PHI.
if (isa<SwitchInst>(DestBB->begin())) {
if (isa<SwitchInst>(BBI)) {
bool MadeChange = false;
// Ignore the default edge for now.
for (unsigned i = 1, e = DestSI->getNumSuccessors(); i != e; ++i) {