diff options
| author | Dale Johannesen <dalej@apple.com> | 2010-03-11 02:10:24 +0000 |
|---|---|---|
| committer | Dale Johannesen <dalej@apple.com> | 2010-03-11 02:10:24 +0000 |
| commit | e68ea060c78356253d771e039747fbc06c623646 (patch) | |
| tree | 67b5e6fddb76412bba6c23997e94fa0029852912 /lib/CodeGen/MachineCSE.cpp | |
| parent | 1f3e445184e5ca2aa4295c2a77f2a4e0b957fea1 (diff) | |
Fix debug_value handling.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98224 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/MachineCSE.cpp')
| -rw-r--r-- | lib/CodeGen/MachineCSE.cpp | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/lib/CodeGen/MachineCSE.cpp b/lib/CodeGen/MachineCSE.cpp index ce95d8d05e..91d3635882 100644 --- a/lib/CodeGen/MachineCSE.cpp +++ b/lib/CodeGen/MachineCSE.cpp @@ -122,8 +122,12 @@ bool MachineCSE::isPhysDefTriviallyDead(unsigned Reg, // Reached end of block, register is obviously dead. return true; - if (I->isDebugValue()) + if (I->isDebugValue()) { + // These must not count against the limit. + ++LookAheadLeft; + ++I; continue; + } bool SeenDef = false; for (unsigned i = 0, e = I->getNumOperands(); i != e; ++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) { if (MI->isLabel() || MI->isPHI() || MI->isImplicitDef() || - MI->isKill() || MI->isInlineAsm()) + MI->isKill() || MI->isInlineAsm() || MI->isDebugValue()) return false; // Ignore copies. |