Allow target to place 2-address pass inserted copies in better spots. Thumb2 will use this to try to avoid breaking up IT blocks.

llvm-svn: 105745

1 files changed, 4 insertions, 12 deletions

diff --git a/llvm/lib/Target/ARM/Thumb2ITBlockPass.cpp b/llvm/lib/Target/ARM/Thumb2ITBlockPass.cpp
index fb33f887340..691444cdc02 100644
--- a/llvm/lib/Target/ARM/Thumb2ITBlockPass.cpp
+++ b/llvm/lib/Target/ARM/Thumb2ITBlockPass.cpp
@@ -61,15 +61,7 @@ static ARMCC::CondCodes getPredicate(const MachineInstr *MI, unsigned &PredReg){
   unsigned Opc = MI->getOpcode();
   if (Opc == ARM::tBcc || Opc == ARM::t2Bcc)
     return ARMCC::AL;
-
-  int PIdx = MI->findFirstPredOperandIdx();
-  if (PIdx == -1) {
-    PredReg = 0;
-    return ARMCC::AL;
-  }
-
-  PredReg = MI->getOperand(PIdx+1).getReg();
-  return (ARMCC::CondCodes)MI->getOperand(PIdx).getImm();
+  return llvm::getInstrPredicate(MI, PredReg);
 }
 
 bool
@@ -242,15 +234,15 @@ bool Thumb2ITBlockPass::InsertITBlock(MachineInstr *First, MachineInstr *Last) {
   // Insert a new block for consecutive predicated instructions.
   MachineFunction *MF = MBB->getParent();
   MachineBasicBlock *NewMBB = MF->CreateMachineBasicBlock(MBB->getBasicBlock());
-  MachineFunction::iterator Pos = MBB;
-  MF->insert(++Pos, NewMBB);
+  MachineFunction::iterator InsertPos = MBB;
+  MF->insert(++InsertPos, NewMBB);
 
   // Move all the successors of this block to the specified block.
   NewMBB->transferSuccessors(MBB);
 
   // Add an edge from CurMBB to NewMBB for the fall-through.
   MBB->addSuccessor(NewMBB);
-  NewMBB->splice(NewMBB->end(), MBB, ++MBBI, MBB->end());  
+  NewMBB->splice(NewMBB->end(), MBB, ++MBBI, MBB->end());
   return true;
 }