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Fix debug_value handling.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98224 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dale Johannesen 2010-03-11 02:10:24 +00:00
parent 1f3e445184
commit e68ea060c7
1 changed files with 6 additions and 2 deletions
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8
lib/CodeGen/MachineCSE.cpp
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@ -122,8 +122,12 @@ bool MachineCSE::isPhysDefTriviallyDead(unsigned Reg,
// Reached end of block, register is obviously dead. // Reached end of block, register is obviously dead.
return true; return true;
if (I->isDebugValue()) if (I->isDebugValue()) {
// These must not count against the limit.
++LookAheadLeft;
++I;
continue; continue;
}
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);
@ -188,7 +192,7 @@ static bool isCopy(const MachineInstr *MI, const TargetInstrInfo *TII) {
bool MachineCSE::isCSECandidate(MachineInstr *MI) { bool MachineCSE::isCSECandidate(MachineInstr *MI) {
if (MI->isLabel() || MI->isPHI() || MI->isImplicitDef() || if (MI->isLabel() || MI->isPHI() || MI->isImplicitDef() ||
MI->isKill() || MI->isInlineAsm()) MI->isKill() || MI->isInlineAsm() || MI->isDebugValue())
return false; return false;
// Ignore copies. // Ignore copies.