- Change TargetInstrInfo::reMaterialize to pass in TargetRegisterInfo.

- If destination is a physical register and it has a subreg index, use the
  sub-register instead.
This fixes PR5423.

llvm-svn: 88745

1 files changed, 8 insertions, 1 deletions

diff --git a/llvm/lib/Target/ARM/ARMBaseInstrInfo.cpp b/llvm/lib/Target/ARM/ARMBaseInstrInfo.cpp
index 868d31dbe0e..7925101d5a9 100644
--- a/llvm/lib/Target/ARM/ARMBaseInstrInfo.cpp
+++ b/llvm/lib/Target/ARM/ARMBaseInstrInfo.cpp
@@ -921,8 +921,15 @@ void ARMBaseInstrInfo::
 reMaterialize(MachineBasicBlock &MBB,
               MachineBasicBlock::iterator I,
               unsigned DestReg, unsigned SubIdx,
-              const MachineInstr *Orig) const {
+              const MachineInstr *Orig,
+              const TargetRegisterInfo *TRI) const {
   DebugLoc dl = Orig->getDebugLoc();
+
+  if (SubIdx && TargetRegisterInfo::isPhysicalRegister(DestReg)) {
+    DestReg = TRI->getSubReg(DestReg, SubIdx);
+    SubIdx = 0;
+  }
+
   unsigned Opcode = Orig->getOpcode();
   switch (Opcode) {
   default: {