test/CodeGen/WinEH/cppeh-min-unwind.ll

; RUN: opt -mtriple=x86_64-pc-windows-msvc -winehprepare -S -o - < %s | FileCheck %s

; This test was generated from the following source:
;
; class SomeClass {
; public:
;   SomeClass();
;   ~SomeClass();
; };
;
; void test() {
;   SomeClass obj;
;   may_throw();
; }


; ModuleID = 'min-unwind.cpp'
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-pc-windows-msvc"

%class.SomeClass = type { [28 x i32] }

; The function entry should be rewritten like this.
; CHECK: define void @_Z4testv()
; CHECK: entry:
; CHECK:   [[OBJ_PTR:\%.+]] = alloca %class.SomeClass, align 4
; CHECK:   call void @_ZN9SomeClassC1Ev(%class.SomeClass* [[OBJ_PTR]])
; CHECK:   call void (...) @llvm.localescape(%class.SomeClass* [[OBJ_PTR]])
; CHECK:   invoke void @_Z9may_throwv()
; CHECK:           to label %invoke.cont unwind label %[[LPAD_LABEL:lpad[0-9]*]]

; Function Attrs: uwtable
define void @_Z4testv() #0 personality i8* bitcast (i32 (...)* @__CxxFrameHandler3 to i8*) {
entry:
  %obj = alloca %class.SomeClass, align 4
  %exn.slot = alloca i8*
  %ehselector.slot = alloca i32
  call void @_ZN9SomeClassC1Ev(%class.SomeClass* %obj)
  invoke void @_Z9may_throwv()
          to label %invoke.cont unwind label %lpad

invoke.cont:                                      ; preds = %entry
  call void @_ZN9SomeClassD1Ev(%class.SomeClass* %obj)
  ret void

; CHECK: [[LPAD_LABEL]]:{{[ ]+}}; preds = %entry
; CHECK:   landingpad { i8*, i32 }
; CHECK-NEXT:           cleanup
; CHECK-NEXT:   [[RECOVER:\%.+]] = call i8* (...) @llvm.eh.actions(i32 0, void (i8*, i8*)* @_Z4testv.cleanup)
; CHECK-NEXT:   indirectbr i8* [[RECOVER]], []

lpad:                                             ; preds = %entry
  %tmp = landingpad { i8*, i32 }
          cleanup
  %tmp1 = extractvalue { i8*, i32 } %tmp, 0
  store i8* %tmp1, i8** %exn.slot
  %tmp2 = extractvalue { i8*, i32 } %tmp, 1
  store i32 %tmp2, i32* %ehselector.slot
  call void @_ZN9SomeClassD1Ev(%class.SomeClass* %obj)
  br label %eh.resume

; CHECK-NOT: eh.resume:

eh.resume:                                        ; preds = %lpad
  %exn = load i8*, i8** %exn.slot
  %sel = load i32, i32* %ehselector.slot
  %lpad.val = insertvalue { i8*, i32 } undef, i8* %exn, 0
  %lpad.val2 = insertvalue { i8*, i32 } %lpad.val, i32 %sel, 1
  resume { i8*, i32 } %lpad.val2

; CHECK: }
}

; This cleanup handler should be outlined.
; CHECK: define internal void @_Z4testv.cleanup(i8*, i8*)
; CHECK: entry:
; CHECK:   [[RECOVER_OBJ:\%.+]] = call i8* @llvm.localrecover(i8* bitcast (void ()* @_Z4testv to i8*), i8* %1, i32 0)
; CHECK:   [[OBJ_PTR1:\%.+]] = bitcast i8* [[RECOVER_OBJ]] to %class.SomeClass*
; CHECK:   call void @_ZN9SomeClassD1Ev(%class.SomeClass* [[OBJ_PTR1]])
; CHECK:   ret void
; CHECK: }

declare void @_ZN9SomeClassC1Ev(%class.SomeClass*) #1

declare void @_Z9may_throwv() #1

declare i32 @__CxxFrameHandler3(...)

declare void @_ZN9SomeClassD1Ev(%class.SomeClass*) #1

attributes #0 = { uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #1 = { "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #2 = { noinline noreturn nounwind }
attributes #3 = { noreturn nounwind }
attributes #4 = { nounwind }

!llvm.ident = !{!0}

!0 = !{!"clang version 3.7.0 (trunk 226027)"}