Create a isFullCopy predicate.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134189 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 4 insertions, 5 deletions

diff --git a/include/llvm/CodeGen/MachineInstr.h b/include/llvm/CodeGen/MachineInstr.h
index 07a14cf0c1..788d149c86 100644
--- a/include/llvm/CodeGen/MachineInstr.h
+++ b/include/llvm/CodeGen/MachineInstr.h
@@ -278,6 +278,9 @@ public:
   bool isCopy() const {
     return getOpcode() == TargetOpcode::COPY;
   }
+  bool isFullCopy() const {
+    return isCopy() && !getOperand(0).getSubReg() && !getOperand(1).getSubReg();
+  }
 
   /// isCopyLike - Return true if the instruction behaves like a copy.
   /// This does not include native copy instructions.
diff --git a/lib/CodeGen/InlineSpiller.cpp b/lib/CodeGen/InlineSpiller.cpp
index 19ae333115..0273891d69 100644
--- a/lib/CodeGen/InlineSpiller.cpp
+++ b/lib/CodeGen/InlineSpiller.cpp
@@ -180,11 +180,7 @@ Spiller *createInlineSpiller(MachineFunctionPass &pass,
 /// isFullCopyOf - If MI is a COPY to or from Reg, return the other register,
 /// otherwise return 0.
 static unsigned isFullCopyOf(const MachineInstr *MI, unsigned Reg) {
-  if (!MI->isCopy())
-    return 0;
-  if (MI->getOperand(0).getSubReg() != 0)
-    return 0;
-  if (MI->getOperand(1).getSubReg() != 0)
+  if (!MI->isFullCopy())
     return 0;
   if (MI->getOperand(0).getReg() == Reg)
       return MI->getOperand(1).getReg();