Remove many calls to TII::isMoveInstr. Targets should be producing COPY anyway.

[oota-llvm.git] / lib / CodeGen / RegAllocFast.cpp

diff --git a/lib/CodeGen/RegAllocFast.cpp b/lib/CodeGen/RegAllocFast.cpp
index f44478e5dd0bf6ae3010965ddc26e7ca54524be2..6bfadf903ea8b998815046e901bc1af5121668d2 100644 (file)
--- a/lib/CodeGen/RegAllocFast.cpp
+++ b/lib/CodeGen/RegAllocFast.cpp
@@ -520,12 +520,9 @@ RAFast::defineVirtReg(MachineInstr *MI, unsigned OpNum,
     if ((!Hint || !TargetRegisterInfo::isPhysicalRegister(Hint)) &&
         MRI->hasOneNonDBGUse(VirtReg)) {
       const MachineInstr &UseMI = *MRI->use_nodbg_begin(VirtReg);
-      unsigned SrcReg, DstReg, SrcSubReg, DstSubReg;
       // It's a copy, use the destination register as a hint.
       if (UseMI.isCopyLike())
         Hint = UseMI.getOperand(0).getReg();
-      else if (TII->isMoveInstr(UseMI, SrcReg, DstReg, SrcSubReg, DstSubReg))
-        Hint = DstReg;
     }
     allocVirtReg(MI, *LRI, Hint);
   } else if (LR.LastUse) {
@@ -789,14 +786,13 @@ void RAFast::AllocateBasicBlock() {
     }
 
     // If this is a copy, we may be able to coalesce.
-    unsigned CopySrc, CopyDst, CopySrcSub, CopyDstSub;
+    unsigned CopySrc = 0, CopyDst = 0, CopySrcSub = 0, CopyDstSub = 0;
     if (MI->isCopy()) {
       CopyDst = MI->getOperand(0).getReg();
       CopySrc = MI->getOperand(1).getReg();
       CopyDstSub = MI->getOperand(0).getSubReg();
       CopySrcSub = MI->getOperand(1).getSubReg();
-    } else if (!TII->isMoveInstr(*MI, CopySrc, CopyDst, CopySrcSub, CopyDstSub))
-      CopySrc = CopyDst = 0;
+    }
 
     // Track registers used by instruction.
     UsedInInstr.reset();