Fix the buildbot failure introduced by r351404

EXPENSIVE_CHECKS buildbots are failing due to r351404.

Add x1 as live in to the funclet basic block for SEH funclets, as well as
-verify-machineinstrs to the test case that triggered the failure.

llvm-svn: 351472

llvm/lib/Target/AArch64/AArch64FrameLowering.cpp

@@ -929,9 +929,11 @@ void AArch64FrameLowering::emitPrologue(MachineFunction &MF,
     // directly, and is not retrieved from X1.
     if (F.hasPersonalityFn()) {
       EHPersonality Per = classifyEHPersonality(F.getPersonalityFn());
-      if (isAsynchronousEHPersonality(Per))
+      if (isAsynchronousEHPersonality(Per)) {
         BuildMI(MBB, MBBI, DL, TII->get(TargetOpcode::COPY), AArch64::FP)
             .addReg(AArch64::X1).setMIFlag(MachineInstr::FrameSetup);
+        MBB.addLiveIn(AArch64::X1);
+      }
     }
 
     return;

llvm/test/CodeGen/AArch64/seh_funclet_x1.ll

@@ -1,4 +1,4 @@
-; RUN: llc -o - %s -mtriple=aarch64-windows | FileCheck %s
+; RUN: llc -o - %s -verify-machineinstrs -mtriple=aarch64-windows | FileCheck %s
 
 ; Windows runtime passes the establisher frame as the second argument to the
 ; termination handler.  Check that we copy it into fp.