diff options
Diffstat (limited to 'lib/CodeGen/PHIElimination.cpp')
| -rw-r--r-- | lib/CodeGen/PHIElimination.cpp | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/lib/CodeGen/PHIElimination.cpp b/lib/CodeGen/PHIElimination.cpp index dc799e8c27..1cbe798945 100644 --- a/lib/CodeGen/PHIElimination.cpp +++ b/lib/CodeGen/PHIElimination.cpp @@ -182,6 +182,10 @@ void llvm::PHIElimination::LowerAtomicPHINode( TII->copyRegToReg(MBB, AfterPHIsIt, DestReg, IncomingReg, RC, RC); } + // Record PHI def. + //assert(!hasPHIDef(DestReg) && "Vreg has multiple phi-defs?"); + //PHIDefs[DestReg] = &MBB; + // Update live variable information if there is any. LiveVariables *LV = getAnalysisIfAvailable<LiveVariables>(); if (LV) { @@ -223,6 +227,13 @@ void llvm::PHIElimination::LowerAtomicPHINode( assert(TargetRegisterInfo::isVirtualRegister(SrcReg) && "Machine PHI Operands must all be virtual registers!"); + // Get the MachineBasicBlock equivalent of the BasicBlock that is the source + // path the PHI. + MachineBasicBlock &opBlock = *MPhi->getOperand(i*2+2).getMBB(); + + // Record the kill. + //PHIKills[SrcReg].insert(&opBlock); + // If source is defined by an implicit def, there is no need to insert a // copy. MachineInstr *DefMI = MRI->getVRegDef(SrcReg); @@ -231,10 +242,6 @@ void llvm::PHIElimination::LowerAtomicPHINode( continue; } - // Get the MachineBasicBlock equivalent of the BasicBlock that is the source - // path the PHI. - MachineBasicBlock &opBlock = *MPhi->getOperand(i*2+2).getMBB(); - // Check to make sure we haven't already emitted the copy for this block. // This can happen because PHI nodes may have multiple entries for the same // basic block. |