[X86] Make sure startproc/endproc are paired

We used different conditions to determine if we should emit startproc vs
endproc.  Use the same condition to ensure that they will always be
paired.

This fixes PR24374.

llvm-svn: 247435

llvm/lib/CodeGen/AsmPrinter/WinException.cpp

@@ -172,7 +172,7 @@ void WinException::endFunction(const MachineFunction *MF) {
     Asm->OutStreamer->PopSection();
   }
 
-  if (shouldEmitMoves)
+  if (shouldEmitMoves || shouldEmitPersonality)
     Asm->OutStreamer->EmitWinCFIEndProc();
 }
 

llvm/test/CodeGen/X86/pr24374.ll

@@ -0,0 +1,37 @@
+; RUN: llc < %s | FileCheck %s
+target datalayout = "e-m:w-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-w64-windows-gnu"
+
+@llvm.global_ctors = appending global [1 x { i32, void ()*, i8* }] [{ i32, void ()*, i8* } { i32 65535, void ()* @g, i8* null }]
+
+declare i32 @__gxx_personality_seh0(...)
+
+; Function Attrs: nounwind
+define void @f() #0 personality i8* bitcast (i32 (...)* @__gxx_personality_seh0 to i8*) {
+entry:
+  invoke void @g()
+          to label %exit unwind label %lpad
+
+lpad:                                             ; preds = %entry
+  landingpad { i8*, i32 }
+          cleanup
+  unreachable
+
+exit:                                             ; preds = %entry
+  unreachable
+}
+; CHECK-LABEL: f:
+; CHECK:       .seh_proc f
+; CHECK:               .seh_handler __gxx_personality_seh0, @unwind, @except
+; CHECK:       callq g
+; CHECK:               .seh_handlerdata
+; CHECK:               .seh_endproc
+
+define void @g() {
+  unreachable
+}
+; CHECK-LABEL: g:
+; CHECK:       .seh_proc g
+; CHECK:       .seh_endproc
+
+attributes #0 = { nounwind }