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

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; 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)"}
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