llvm/test/CodeGen/WinEH/cppeh-frame-vars.ll

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

; This test is based on the following code:
;
; struct SomeData {
;   int a;
;   int b;
; };
;
; void may_throw();
; void does_not_throw(int i);
; void dump(int *, int, SomeData&);
;
; void test() {
;   int NumExceptions = 0;
;   int ExceptionVal[10];
;   SomeData Data = { 0, 0 };
;
;   for (int i = 0; i < 10; ++i) {
;     try {
;       may_throw();
;       Data.a += i;
;     }
;     catch (int e) {
;       ExceptionVal[NumExceptions] = e;
;       ++NumExceptions;
;       if (e == i)
;         Data.b += e;
;       else
;         Data.a += e;
;     }
;     does_not_throw(NumExceptions);
;   }
;   dump(ExceptionVal, NumExceptions, Data);
; }

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

%rtti.TypeDescriptor2 = type { i8**, i8*, [3 x i8] }
%struct.SomeData = type { i32, i32 }

$"\01??_R0H@8" = comdat any

@"\01??_7type_info@@6B@" = external constant i8*
@"\01??_R0H@8" = linkonce_odr global %rtti.TypeDescriptor2 { i8** @"\01??_7type_info@@6B@", i8* null, [3 x i8] c".H\00" }, comdat

; The function entry should be rewritten like this.
; CHECK: define void @"\01?test@@YAXXZ"()
; CHECK: entry:
; CHECK:   [[NUMEXCEPTIONS_PTR:\%.+]] = alloca i32, align 4
; CHECK:   [[EXCEPTIONVAL_PTR:\%.+]] = alloca [10 x i32], align 16
; CHECK:   [[DATA_PTR:\%.+]] = alloca %struct.SomeData, align 4
; CHECK:   [[I_PTR:\%.+]] = alloca i32, align 4
; CHECK:   [[E_PTR:\%.+]] = alloca i32, align 4
; CHECK:   store i32 0, i32* [[NUMEXCEPTIONS_PTR]], align 4
; CHECK:   [[TMP:\%.+]] = bitcast %struct.SomeData* [[DATA_PTR]] to i8*
; CHECK:   call void @llvm.memset(i8* [[TMP]], i8 0, i64 8, i32 4, i1 false)
; CHECK:   store i32 0, i32* [[I_PTR]], align 4
; CHECK:   call void (...) @llvm.frameescape(i32* [[E_PTR]], i32* [[NUMEXCEPTIONS_PTR]], [10 x i32]* [[EXCEPTIONVAL_PTR]], i32* [[I_PTR]], %struct.SomeData* [[DATA_PTR]])
; CHECK:   br label %for.cond

; Function Attrs: uwtable
define void @"\01?test@@YAXXZ"() #0 {
entry:
  %NumExceptions = alloca i32, align 4
  %ExceptionVal = alloca [10 x i32], align 16
  %Data = alloca %struct.SomeData, align 4
  %i = alloca i32, align 4
  %exn.slot = alloca i8*
  %ehselector.slot = alloca i32
  %e = alloca i32, align 4
  store i32 0, i32* %NumExceptions, align 4
  %tmp = bitcast %struct.SomeData* %Data to i8*
  call void @llvm.memset(i8* %tmp, i8 0, i64 8, i32 4, i1 false)
  store i32 0, i32* %i, align 4
  br label %for.cond

for.cond:                                         ; preds = %for.inc, %entry
  %tmp1 = load i32, i32* %i, align 4
  %cmp = icmp slt i32 %tmp1, 10
  br i1 %cmp, label %for.body, label %for.end

; CHECK: for.body:
; CHECK:   invoke void @"\01?may_throw@@YAXXZ"()
; CHECK:           to label %invoke.cont unwind label %[[LPAD_LABEL:lpad[0-9]*]]

for.body:                                         ; preds = %for.cond
  invoke void @"\01?may_throw@@YAXXZ"()
          to label %invoke.cont unwind label %lpad

invoke.cont:                                      ; preds = %for.body
  %tmp2 = load i32, i32* %i, align 4
  %a = getelementptr inbounds %struct.SomeData, %struct.SomeData* %Data, i32 0, i32 0
  %tmp3 = load i32, i32* %a, align 4
  %add = add nsw i32 %tmp3, %tmp2
  store i32 %add, i32* %a, align 4
  br label %try.cont

; CHECK: [[LPAD_LABEL]]:{{[ ]+}}; preds = %for.body
; CHECK:   landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__CxxFrameHandler3 to i8*)
; CHECK-NEXT:           catch i8* bitcast (%rtti.TypeDescriptor2* @"\01??_R0H@8" to i8*)
; CHECK-NEXT:   [[RECOVER:\%.+]] = call i8* (...) @llvm.eh.actions(i32 1, i8* bitcast (%rtti.TypeDescriptor2* @"\01??_R0H@8" to i8*), i32 0, i8* (i8*, i8*)* @"\01?test@@YAXXZ.catch")
; CHECK-NEXT:   indirectbr i8* [[RECOVER]], [label %try.cont]

lpad:                                             ; preds = %for.body
  %tmp4 = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__CxxFrameHandler3 to i8*)
          catch i8* bitcast (%rtti.TypeDescriptor2* @"\01??_R0H@8" to i8*)
  %tmp5 = extractvalue { i8*, i32 } %tmp4, 0
  store i8* %tmp5, i8** %exn.slot
  %tmp6 = extractvalue { i8*, i32 } %tmp4, 1
  store i32 %tmp6, i32* %ehselector.slot
  br label %catch.dispatch

; CHECK-NOT: catch.dispatch:

catch.dispatch:                                   ; preds = %lpad
  %sel = load i32, i32* %ehselector.slot
  %tmp7 = call i32 @llvm.eh.typeid.for(i8* bitcast (%rtti.TypeDescriptor2* @"\01??_R0H@8" to i8*)) #1
  %matches = icmp eq i32 %sel, %tmp7
  br i1 %matches, label %catch, label %eh.resume

; CHECK-NOT: catch:

catch:                                            ; preds = %catch.dispatch
  %exn = load i8*, i8** %exn.slot
  %e.i8 = bitcast i32* %e to i8*
  call void @llvm.eh.begincatch(i8* %exn, i8* %e.i8) #1
  %tmp11 = load i32, i32* %e, align 4
  %tmp12 = load i32, i32* %NumExceptions, align 4
  %idxprom = sext i32 %tmp12 to i64
  %arrayidx = getelementptr inbounds [10 x i32], [10 x i32]* %ExceptionVal, i32 0, i64 %idxprom
  store i32 %tmp11, i32* %arrayidx, align 4
  %tmp13 = load i32, i32* %NumExceptions, align 4
  %inc = add nsw i32 %tmp13, 1
  store i32 %inc, i32* %NumExceptions, align 4
  %tmp14 = load i32, i32* %e, align 4
  %tmp15 = load i32, i32* %i, align 4
  %cmp1 = icmp eq i32 %tmp14, %tmp15
  br i1 %cmp1, label %if.then, label %if.else

; CHECK-NOT: if.then:

if.then:                                          ; preds = %catch
  %tmp16 = load i32, i32* %e, align 4
  %b = getelementptr inbounds %struct.SomeData, %struct.SomeData* %Data, i32 0, i32 1
  %tmp17 = load i32, i32* %b, align 4
  %add2 = add nsw i32 %tmp17, %tmp16
  store i32 %add2, i32* %b, align 4
  br label %if.end

; CHECK-NOT: if.else:

if.else:                                          ; preds = %catch
  %tmp18 = load i32, i32* %e, align 4
  %a3 = getelementptr inbounds %struct.SomeData, %struct.SomeData* %Data, i32 0, i32 0
  %tmp19 = load i32, i32* %a3, align 4
  %add4 = add nsw i32 %tmp19, %tmp18
  store i32 %add4, i32* %a3, align 4
  br label %if.end

; CHECK-NOT: if.end:

if.end:                                           ; preds = %if.else, %if.then
  call void @llvm.eh.endcatch() #1
  br label %try.cont

try.cont:                                         ; preds = %if.end, %invoke.cont
  %tmp20 = load i32, i32* %NumExceptions, align 4
  call void @"\01?does_not_throw@@YAXH@Z"(i32 %tmp20)
  br label %for.inc

for.inc:                                          ; preds = %try.cont
  %tmp21 = load i32, i32* %i, align 4
  %inc5 = add nsw i32 %tmp21, 1
  store i32 %inc5, i32* %i, align 4
  br label %for.cond

for.end:                                          ; preds = %for.cond
  %tmp22 = load i32, i32* %NumExceptions, align 4
  %arraydecay = getelementptr inbounds [10 x i32], [10 x i32]* %ExceptionVal, i32 0, i32 0
  call void @"\01?dump@@YAXPEAHHAEAUSomeData@@@Z"(i32* %arraydecay, i32 %tmp22, %struct.SomeData* dereferenceable(8) %Data)
  ret void

; CHECK-NOT: eh.resume:

eh.resume:                                        ; preds = %catch.dispatch
  %exn6 = load i8*, i8** %exn.slot
  %sel7 = load i32, i32* %ehselector.slot
  %lpad.val = insertvalue { i8*, i32 } undef, i8* %exn6, 0
  %lpad.val8 = insertvalue { i8*, i32 } %lpad.val, i32 %sel7, 1
  resume { i8*, i32 } %lpad.val8

; CHECK: }
}

; The following catch handler should be outlined.
; CHECK-LABEL: define internal i8* @"\01?test@@YAXXZ.catch"(i8*, i8*)
; CHECK: entry:
; CHECK:   [[RECOVER_E:\%.+]] = call i8* @llvm.framerecover(i8* bitcast (void ()* @"\01?test@@YAXXZ" to i8*), i8* %1, i32 0)
; CHECK:   [[E_PTR1:\%.+]] = bitcast i8* [[RECOVER_E]] to i32*
; CHECK:   [[RECOVER_NUMEXCEPTIONS:\%.+]] = call i8* @llvm.framerecover(i8* bitcast (void ()* @"\01?test@@YAXXZ" to i8*), i8* %1, i32 1)
; CHECK:   [[NUMEXCEPTIONS_PTR1:\%.+]] = bitcast i8* [[RECOVER_NUMEXCEPTIONS]] to i32*
; CHECK:   [[RECOVER_EXCEPTIONVAL:\%.+]] = call i8* @llvm.framerecover(i8* bitcast (void ()* @"\01?test@@YAXXZ" to i8*), i8* %1, i32 2)
; CHECK:   [[EXCEPTIONVAL_PTR1:\%.+]] = bitcast i8* [[RECOVER_EXCEPTIONVAL]] to [10 x i32]*
; CHECK:   [[RECOVER_I:\%.+]] = call i8* @llvm.framerecover(i8* bitcast (void ()* @"\01?test@@YAXXZ" to i8*), i8* %1, i32 3)
; CHECK:   [[I_PTR1:\%.+]] = bitcast i8* [[RECOVER_I]] to i32*
; CHECK:   [[RECOVER_DATA:\%.+]] = call i8* @llvm.framerecover(i8* bitcast (void ()* @"\01?test@@YAXXZ" to i8*), i8* %1, i32 4)
; CHECK:   [[DATA_PTR1:\%.+]] = bitcast i8* [[RECOVER_DATA]] to %struct.SomeData*
; CHECK:   [[TMP:\%.+]] = load i32, i32* [[E_PTR1]], align 4
; CHECK:   [[TMP1:\%.+]] = load i32, i32* [[NUMEXCEPTIONS_PTR]], align 4
; CHECK:   [[IDXPROM:\%.+]] = sext i32 [[TMP1]] to i64
; CHECK:   [[ARRAYIDX:\%.+]] = getelementptr inbounds [10 x i32], [10 x i32]* [[EXCEPTIONVAL_PTR1]], i32 0, i64 [[IDXPROM]]
; CHECK:   store i32 [[TMP]], i32* [[ARRAYIDX]], align 4
; CHECK:   [[TMP2:\%.+]] = load i32, i32* [[NUMEXCEPTIONS_PTR1]], align 4
; CHECK:   [[INC:\%.+]] = add nsw i32 [[TMP2]], 1
; CHECK:   store i32 [[INC]], i32* [[NUMEXCEPTIONS_PTR]], align 4
; CHECK:   [[TMP3:\%.+]] = load i32, i32* [[E_PTR1]], align 4
; CHECK:   [[TMP4:\%.+]] = load i32, i32* [[I_PTR1]], align 4
; CHECK:   [[CMP:\%.+]] = icmp eq i32 [[TMP3]], [[TMP4]]
; CHECK:   br i1 [[CMP]], label %if.then, label %if.else
;
; CHECK: if.then:                                          ; preds = %entry
; CHECK:   [[TMP5:\%.+]] = load i32, i32* [[E_PTR1]], align 4
; CHECK:   [[B_PTR:\%.+]] = getelementptr inbounds %struct.SomeData, %struct.SomeData* [[DATA_PTR1]], i32 0, i32 1
; CHECK:   [[TMP6:\%.+]] = load i32, i32* [[B_PTR]], align 4
; CHECK:   %add2 = add nsw i32 [[TMP6]], [[TMP5]]
; CHECK:   store i32 [[ADD:\%.+]], i32* [[B_PTR]], align 4
; CHECK:   br label %if.end
;
; CHECK: if.else:                                          ; preds = %entry
; CHECK:   [[TMP7:\%.+]] = load i32, i32* %e, align 4
; CHECK:   [[A3:\%.+]] = getelementptr inbounds %struct.SomeData, %struct.SomeData* %Data, i32 0, i32 0
; CHECK:   [[TMP8:\%.+]] = load i32, i32* %a3, align 4
; CHECK:   [[ADD1:\%.+]] = add nsw i32 [[TMP8]], [[TMP7]]
; CHECK:   store i32 [[ADD1]], i32* [[A3]], align 4
; CHECK:   br label %if.end
;
; CHECK: if.end:                                           ; preds = %if.else, %if.then
; CHECK:   ret i8* blockaddress(@"\01?test@@YAXXZ", %try.cont)
; CHECK: }


; Function Attrs: nounwind
declare void @llvm.memset(i8* nocapture, i8, i64, i32, i1) #1

declare void @"\01?may_throw@@YAXXZ"() #2

declare i32 @__CxxFrameHandler3(...)

; Function Attrs: nounwind readnone
declare i32 @llvm.eh.typeid.for(i8*) #3

declare void @llvm.eh.begincatch(i8*, i8*)

declare void @llvm.eh.endcatch()

declare void @"\01?does_not_throw@@YAXH@Z"(i32) #2

declare void @"\01?dump@@YAXPEAHHAEAUSomeData@@@Z"(i32*, i32, %struct.SomeData* dereferenceable(8)) #2

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

!llvm.module.flags = !{!0}
!llvm.ident = !{!1}

!0 = !{i32 1, !"PIC Level", i32 2}
!1 = !{!"clang version 3.7.0 (trunk 228868)"}