[Hexagon] Copy subregisters in HexagonStoreWiden

When converting an instruction to the wider version, copy any
subregisters if the original operand has a subregister.

Patch by Brendon Cahoon.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@328333 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/Hexagon/HexagonStoreWidening.cpp b/lib/Target/Hexagon/HexagonStoreWidening.cpp
index 300f6de..8ed1dd6 100644 (file)
--- a/lib/Target/Hexagon/HexagonStoreWidening.cpp
+++ b/lib/Target/Hexagon/HexagonStoreWidening.cpp
@@ -433,10 +433,11 @@ bool HexagonStoreWidening::createWideStores(InstrGroup &OG, InstrGroup &NG,
     const MCInstrDesc &StD = TII->get(WOpc);
     MachineOperand &MR = FirstSt->getOperand(0);
     int64_t Off = FirstSt->getOperand(1).getImm();
-    MachineInstr *StI = BuildMI(*MF, DL, StD)
-                          .addReg(MR.getReg(), getKillRegState(MR.isKill()))
-                          .addImm(Off)
-                          .addImm(Val);
+    MachineInstr *StI =
+        BuildMI(*MF, DL, StD)
+            .addReg(MR.getReg(), getKillRegState(MR.isKill()), MR.getSubReg())
+            .addImm(Off)
+            .addImm(Val);
     StI->addMemOperand(*MF, NewM);
     NG.push_back(StI);
   } else {
@@ -455,10 +456,11 @@ bool HexagonStoreWidening::createWideStores(InstrGroup &OG, InstrGroup &NG,
     const MCInstrDesc &StD = TII->get(WOpc);
     MachineOperand &MR = FirstSt->getOperand(0);
     int64_t Off = FirstSt->getOperand(1).getImm();
-    MachineInstr *StI = BuildMI(*MF, DL, StD)
-                          .addReg(MR.getReg(), getKillRegState(MR.isKill()))
-                          .addImm(Off)
-                          .addReg(VReg, RegState::Kill);
+    MachineInstr *StI =
+        BuildMI(*MF, DL, StD)
+            .addReg(MR.getReg(), getKillRegState(MR.isKill()), MR.getSubReg())
+            .addImm(Off)
+            .addReg(VReg, RegState::Kill);
     StI->addMemOperand(*MF, NewM);
     NG.push_back(StI);
   }