Remove predicates when changing an add into an unpredicable mov.

Since the mov is executed unconditionally, make sure that the add didn't have
any predicate.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93909 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 7 insertions, 3 deletions

diff --git a/lib/Target/ARM/Thumb2InstrInfo.cpp b/lib/Target/ARM/Thumb2InstrInfo.cpp
index f4a8c27..387edaf 100644
--- a/lib/Target/ARM/Thumb2InstrInfo.cpp
+++ b/lib/Target/ARM/Thumb2InstrInfo.cpp
@@ -329,12 +329,16 @@ bool llvm::rewriteT2FrameIndex(MachineInstr &MI, unsigned FrameRegIdx,
     Offset += MI.getOperand(FrameRegIdx+1).getImm();
 
     bool isSP = FrameReg == ARM::SP;
-    if (Offset == 0) {
+    unsigned PredReg;
+    if (Offset == 0 && getInstrPredicate(&MI, PredReg) == ARMCC::AL) {
       // Turn it into a move.
       MI.setDesc(TII.get(ARM::tMOVgpr2gpr));
       MI.getOperand(FrameRegIdx).ChangeToRegister(FrameReg, false);
-      MI.RemoveOperand(FrameRegIdx+1);
-      Offset = 0;
+      // Remove offset and remaining explicit predicate operands.
+      do MI.RemoveOperand(FrameRegIdx+1);
+      while (MI.getNumOperands() > FrameRegIdx+1 &&
+             (!MI.getOperand(FrameRegIdx+1).isReg() ||
+              !MI.getOperand(FrameRegIdx+1).isImm()));
       return true;
     }