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Revert r133607. This is causing failures in the Clang gccTestSuite.

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Specifically, gcc.c-torture/compile/pr21356.c.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133646 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chad Rosier 2011-06-22 21:13:23 +00:00
parent bbdffa9ab0
commit f78b5952c3
1 changed files with 3 additions and 3 deletions
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6
lib/CodeGen/TailDuplication.cpp
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@ -568,9 +568,9 @@ bool
TailDuplicatePass::isSimpleBB(MachineBasicBlock *TailBB) { TailDuplicatePass::isSimpleBB(MachineBasicBlock *TailBB) {
if (TailBB->succ_size() != 1) if (TailBB->succ_size() != 1)
return false; return false;
MachineBasicBlock::iterator I = TailBB->begin(); MachineBasicBlock::iterator I = TailBB->getFirstNonPHI();
MachineBasicBlock::iterator E = TailBB->end(); MachineBasicBlock::iterator E = TailBB->end();
while (I != E && I->isDebugValue()) while (I->isDebugValue() && I != E)
++I; ++I;
if (I == E) if (I == E)
return true; return true;
@ -712,7 +712,7 @@ TailDuplicatePass::TailDuplicate(MachineBasicBlock *TailBB, MachineFunction &MF,
DenseSet<unsigned> UsedByPhi; DenseSet<unsigned> UsedByPhi;
getRegsUsedByPHIs(*TailBB, &UsedByPhi); getRegsUsedByPHIs(*TailBB, &UsedByPhi);
if (isSimpleBB(TailBB)) if (0 && isSimpleBB(TailBB))
return duplicateSimpleBB(TailBB, TDBBs, UsedByPhi, Copies); return duplicateSimpleBB(TailBB, TDBBs, UsedByPhi, Copies);
// Iterate through all the unique predecessors and tail-duplicate this // Iterate through all the unique predecessors and tail-duplicate this