Add proper register aliases
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75999 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/SystemZ/SystemZInstrInfo.cpp b/lib/Target/SystemZ/SystemZInstrInfo.cpp
index c82aa0b..92418ac 100644
--- a/lib/Target/SystemZ/SystemZInstrInfo.cpp
+++ b/lib/Target/SystemZ/SystemZInstrInfo.cpp
@@ -149,8 +149,6 @@
SystemZInstrInfo::isMoveInstr(const MachineInstr& MI,
unsigned &SrcReg, unsigned &DstReg,
unsigned &SrcSubIdx, unsigned &DstSubIdx) const {
- SrcSubIdx = DstSubIdx = 0; // No sub-registers yet.
-
switch (MI.getOpcode()) {
default:
return false;
@@ -164,6 +162,8 @@
"invalid register-register move instruction");
SrcReg = MI.getOperand(1).getReg();
DstReg = MI.getOperand(0).getReg();
+ SrcSubIdx = MI.getOperand(1).getSubReg();
+ DstSubIdx = MI.getOperand(0).getSubReg();
return true;
}
}