[AArch64] When creating MRS instruction, make sure the destination register is

declared as a definition.

This fixes the machine verifier error for CodeGen/AArch64/nzcv-save.ll.

llvm-svn: 267185

diff --git a/llvm/lib/Target/AArch64/AArch64InstrInfo.cpp b/llvm/lib/Target/AArch64/AArch64InstrInfo.cpp
index b0574f2..eb0c578 100644 (file)
--- a/llvm/lib/Target/AArch64/AArch64InstrInfo.cpp
+++ b/llvm/lib/Target/AArch64/AArch64InstrInfo.cpp
@@ -2138,8 +2138,7 @@ void AArch64InstrInfo::copyPhysReg(MachineBasicBlock &MBB,
 
   if (SrcReg == AArch64::NZCV) {
     assert(AArch64::GPR64RegClass.contains(DestReg) && "Invalid NZCV copy");
-    BuildMI(MBB, I, DL, get(AArch64::MRS))
-      .addReg(DestReg)
+    BuildMI(MBB, I, DL, get(AArch64::MRS), DestReg)
       .addImm(AArch64SysReg::NZCV)
       .addReg(AArch64::NZCV, RegState::Implicit | getKillRegState(KillSrc));
     return;

diff --git a/llvm/test/CodeGen/AArch64/nzcv-save.ll b/llvm/test/CodeGen/AArch64/nzcv-save.ll
index f8f42ec..9329f39 100644 (file)
--- a/llvm/test/CodeGen/AArch64/nzcv-save.ll
+++ b/llvm/test/CodeGen/AArch64/nzcv-save.ll
@@ -1,4 +1,4 @@
-; RUN: llc -march=aarch64 < %s | FileCheck %s
+; RUN: llc -verify-machineinstrs -march=aarch64 < %s | FileCheck %s
 
 ; CHECK: mrs [[NZCV_SAVE:x[0-9]+]], NZCV
 ; CHECK: msr NZCV, [[NZCV_SAVE]]