[AArch64] Fix invalid use of references to BuildMI.

This was found in GCC PR65773 (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65773).

We shouldn't be taking a reference to the temporary that BuildMI returns, we must copy it.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@235088 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/AArch64/AArch64InstrInfo.cpp b/lib/Target/AArch64/AArch64InstrInfo.cpp
index 8e0af2dd5161ab1d35053dc69700dccfea7d325c..db231c44ae4bc14c212f5c6785b579a429b62ceb 100644 (file)
--- a/lib/Target/AArch64/AArch64InstrInfo.cpp
+++ b/lib/Target/AArch64/AArch64InstrInfo.cpp
@@ -1526,7 +1526,7 @@ void AArch64InstrInfo::copyPhysRegTuple(
   }
 
   for (; SubReg != End; SubReg += Incr) {
-    const MachineInstrBuilder &MIB = BuildMI(MBB, I, DL, get(Opcode));
+    const MachineInstrBuilder MIB = BuildMI(MBB, I, DL, get(Opcode));
     AddSubReg(MIB, DestReg, Indices[SubReg], RegState::Define, TRI);
     AddSubReg(MIB, SrcReg, Indices[SubReg], 0, TRI);
     AddSubReg(MIB, SrcReg, Indices[SubReg], getKillRegState(KillSrc), TRI);
@@ -1904,7 +1904,7 @@ void AArch64InstrInfo::storeRegToStackSlot(
   }
   assert(Opc && "Unknown register class");
 
-  const MachineInstrBuilder &MI = BuildMI(MBB, MBBI, DL, get(Opc))
+  const MachineInstrBuilder MI = BuildMI(MBB, MBBI, DL, get(Opc))
                                       .addReg(SrcReg, getKillRegState(isKill))
                                       .addFrameIndex(FI);
 
@@ -2002,7 +2002,7 @@ void AArch64InstrInfo::loadRegFromStackSlot(
   }
   assert(Opc && "Unknown register class");
 
-  const MachineInstrBuilder &MI = BuildMI(MBB, MBBI, DL, get(Opc))
+  const MachineInstrBuilder MI = BuildMI(MBB, MBBI, DL, get(Opc))
                                       .addReg(DestReg, getDefRegState(true))
                                       .addFrameIndex(FI);
   if (Offset)