Change TargetInstrInfo::isMoveInstr to return source and destination sub-register indices as well.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@62600 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/RegAllocPBQP.cpp b/lib/CodeGen/RegAllocPBQP.cpp
index 40f7570..dfee8cf9b 100644
--- a/lib/CodeGen/RegAllocPBQP.cpp
+++ b/lib/CodeGen/RegAllocPBQP.cpp
@@ -359,10 +359,10 @@
          iItr != iEnd; ++iItr) {
 
       const MachineInstr *instr = &*iItr;
-      unsigned srcReg, dstReg;
+      unsigned srcReg, dstReg, srcSubReg, dstSubReg;
 
       // If this isn't a copy then continue to the next instruction.
-      if (!tii->isMoveInstr(*instr, srcReg, dstReg))
+      if (!tii->isMoveInstr(*instr, srcReg, dstReg, srcSubReg, dstSubReg))
         continue;
 
       // If the registers are already the same our job is nice and easy.