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dbg_value may end a block.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@99378 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng
2010-03-24 01:50:28 +00:00
parent b7ba5781e6
commit 2250425d6e
1 changed files with 4 additions and 4 deletions
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8
lib/CodeGen/MachineCSE.cpp
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@ -118,14 +118,14 @@ bool MachineCSE::isPhysDefTriviallyDead(unsigned Reg,
MachineBasicBlock::const_iterator E) { MachineBasicBlock::const_iterator E) {
unsigned LookAheadLeft = 5; unsigned LookAheadLeft = 5;
while (LookAheadLeft) { while (LookAheadLeft) {
// Skip over dbg_value's.
while (I != E && I->isDebugValue())
++I;
if (I == E) if (I == E)
// Reached end of block, register is obviously dead. // Reached end of block, register is obviously dead.
return true; return true;
// Skip over dbg_value's.
while (I->isDebugValue())
++I;
bool SeenDef = false; bool SeenDef = false;
for (unsigned i = 0, e = I->getNumOperands(); i != e; ++i) { for (unsigned i = 0, e = I->getNumOperands(); i != e; ++i) {
const MachineOperand &MO = I->getOperand(i); const MachineOperand &MO = I->getOperand(i);