Fix an obvious bug in isMoveInstr. It needs to return sub-register indices.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103157 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/ARM/ARMBaseInstrInfo.cpp b/lib/Target/ARM/ARMBaseInstrInfo.cpp
index 847ec1b..d886a1f 100644 (file)
--- a/lib/Target/ARM/ARMBaseInstrInfo.cpp
+++ b/lib/Target/ARM/ARMBaseInstrInfo.cpp
@@ -540,8 +540,6 @@ bool
 ARMBaseInstrInfo::isMoveInstr(const MachineInstr &MI,
                               unsigned &SrcReg, unsigned &DstReg,
                               unsigned& SrcSubIdx, unsigned& DstSubIdx) const {
-  SrcSubIdx = DstSubIdx = 0; // No sub-registers.
-
   switch (MI.getOpcode()) {
   default: break;
   case ARM::VMOVS:
@@ -551,6 +549,8 @@ ARMBaseInstrInfo::isMoveInstr(const MachineInstr &MI,
   case ARM::VMOVQQ : {
     SrcReg = MI.getOperand(1).getReg();
     DstReg = MI.getOperand(0).getReg();
+    SrcSubIdx = MI.getOperand(1).getSubReg();
+    DstSubIdx = MI.getOperand(0).getSubReg();
     return true;
   }
   case ARM::MOVr:
@@ -565,6 +565,8 @@ ARMBaseInstrInfo::isMoveInstr(const MachineInstr &MI,
            "Invalid ARM MOV instruction");
     SrcReg = MI.getOperand(1).getReg();
     DstReg = MI.getOperand(0).getReg();
+    SrcSubIdx = MI.getOperand(1).getSubReg();
+    DstSubIdx = MI.getOperand(0).getSubReg();
     return true;
   }
   }