diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/CodeGen/PHIElimination.cpp | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/lib/CodeGen/PHIElimination.cpp b/lib/CodeGen/PHIElimination.cpp index 4e2ed67..b50a008 100644 --- a/lib/CodeGen/PHIElimination.cpp +++ b/lib/CodeGen/PHIElimination.cpp @@ -97,7 +97,7 @@ bool PNE::runOnMachineFunction(MachineFunction &Fn) { E = ImpDefs.end(); I != E; ++I) { MachineInstr *DefMI = *I; unsigned DefReg = DefMI->getOperand(0).getReg(); - if (MRI->use_begin(DefReg) == MRI->use_end()) + if (MRI->use_empty(DefReg)) DefMI->eraseFromParent(); } @@ -127,8 +127,10 @@ bool PNE::EliminatePHINodes(MachineFunction &MF, MachineBasicBlock &MBB) { return true; } +/// isSourceDefinedByImplicitDef - Return true if all sources of the phi node +/// are implicit_def's. static bool isSourceDefinedByImplicitDef(const MachineInstr *MPhi, - const MachineRegisterInfo *MRI) { + const MachineRegisterInfo *MRI) { for (unsigned i = 1; i != MPhi->getNumOperands(); i += 2) { unsigned SrcReg = MPhi->getOperand(i).getReg(); const MachineInstr *DefMI = MRI->getVRegDef(SrcReg); @@ -229,7 +231,7 @@ void PNE::LowerAtomicPHINode(MachineBasicBlock &MBB, // Find a safe location to insert the copy, this may be the first terminator // in the block (or end()). MachineBasicBlock::iterator InsertPos = opBlock.getFirstTerminator(); - + // Insert the copy. TII->copyRegToReg(opBlock, InsertPos, IncomingReg, SrcReg, RC, RC); |