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llvm-6502/test/CodeGen/WinEH/cppeh-inalloca.ll
David Majnemer cc714e2142 Move the personality function from LandingPadInst to Function 
The personality routine currently lives in the LandingPadInst.

This isn't desirable because:
- All LandingPadInsts in the same function must have the same
  personality routine.  This means that each LandingPadInst beyond the
  first has an operand which produces no additional information.

- There is ongoing work to introduce EH IR constructs other than
  LandingPadInst.  Moving the personality routine off of any one
  particular Instruction and onto the parent function seems a lot better
  than have N different places a personality function can sneak onto an
  exceptional function.

Differential Revision: http://reviews.llvm.org/D10429

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@239940 91177308-0d34-0410-b5e6-96231b3b80d8
2015-06-17 20:52:32 +00:00

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; RUN: opt -mtriple=x86_64-pc-windows-msvc -winehprepare -S -o - < %s | FileCheck %s
; This test is built from the following code:
; struct A {
; A(int a);
; A(const A &o);
; ~A();
; int a;
; };
;
; void may_throw();
;
; int test(A a) {
; try {
; may_throw();
; }
; catch (int e) {
; return a.a + e;
; }
; return 0;
; }
;
; The test was built for a 32-bit Windows target and then the reference to
; the inalloca instruction was manually sunk into the landingpad.
; ModuleID = 'cppeh-inalloca.cpp'
%rtti.TypeDescriptor2 = type { i8**, i8*, [3 x i8] }
%struct.A = type { 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 i32 @"\01?test@@YAHUA@@@Z"(<{ %struct.A }>* inalloca)
; CHECK: entry:
; CHECK: [[TMP_REGMEM:\%.+]] = alloca <{ %struct.A }>*
; CHECK: store <{ %struct.A }>* %0, <{ %struct.A }>** [[TMP_REGMEM]]
; CHECK: [[RETVAL:\%.+]] = alloca i32, align 4
; CHECK: [[E_PTR:\%.+]] = alloca i32, align 4
; CHECK: [[CLEANUP_SLOT:\%.+]] = alloca i32
; CHECK: call void (...) @llvm.frameescape(i32* %e, <{ %struct.A }>** [[TMP_REGMEM]], i32* [[RETVAL]], i32* [[CLEANUP_SLOT]])
; CHECK: invoke void @"\01?may_throw@@YAXXZ"()
; CHECK: to label %invoke.cont unwind label %[[LPAD_LABEL:lpad[0-9]*]]
define i32 @"\01?test@@YAHUA@@@Z"(<{ %struct.A }>* inalloca) #0 personality i8* bitcast (i32 (...)* @__CxxFrameHandler3 to i8*) {
entry:
%retval = alloca i32, align 4
%exn.slot = alloca i8*
%ehselector.slot = alloca i32
%e = alloca i32, align 4
%cleanup.dest.slot = alloca i32
invoke void @"\01?may_throw@@YAXXZ"()
to label %invoke.cont unwind label %lpad
invoke.cont: ; preds = %entry
br label %try.cont
; CHECK: [[LPAD_LABEL]]:{{[ ]+}}; preds = %entry
; CHECK: landingpad { i8*, i32 }
; CHECK-NEXT: cleanup
; CHECK-NEXT: catch i8* bitcast (%rtti.TypeDescriptor2* @"\01??_R0H@8" to i8*)
; CHECK-NEXT: [[RECOVER:\%recover.*]] = call i8* (...) @llvm.eh.actions(i32 1, i8* bitcast (%rtti.TypeDescriptor2* @"\01??_R0H@8" to i8*), i32 0, i8* (i8*, i8*)* @"\01?test@@YAHUA@@@Z.catch", i32 0, void (i8*, i8*)* @"\01?test@@YAHUA@@@Z.cleanup")
; CHECK-NEXT: indirectbr i8* [[RECOVER]], [label %cleanup]
lpad: ; preds = %entry
%1 = landingpad { i8*, i32 }
cleanup
catch i8* bitcast (%rtti.TypeDescriptor2* @"\01??_R0H@8" to i8*)
%2 = extractvalue { i8*, i32 } %1, 0
store i8* %2, i8** %exn.slot
%3 = extractvalue { i8*, i32 } %1, 1
store i32 %3, i32* %ehselector.slot
br label %catch.dispatch
; CHECK-NOT: catch.dispatch:
catch.dispatch: ; preds = %lpad
%sel = load i32, i32* %ehselector.slot
%4 = call i32 @llvm.eh.typeid.for(i8* bitcast (%rtti.TypeDescriptor2* @"\01??_R0H@8" to i8*)) #3
%matches = icmp eq i32 %sel, %4
br i1 %matches, label %catch, label %ehcleanup
; 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) #3
%a = getelementptr inbounds <{ %struct.A }>, <{ %struct.A }>* %0, i32 0, i32 0
%a1 = getelementptr inbounds %struct.A, %struct.A* %a, i32 0, i32 0
%tmp8 = load i32, i32* %a1, align 4
%tmp9 = load i32, i32* %e, align 4
%add = add nsw i32 %tmp8, %tmp9
store i32 %add, i32* %retval
store i32 1, i32* %cleanup.dest.slot
call void @llvm.eh.endcatch() #3
br label %cleanup
try.cont: ; preds = %invoke.cont
store i32 0, i32* %retval
store i32 1, i32* %cleanup.dest.slot
br label %cleanup
; The cleanup block should be re-written like this.
; CHECK: cleanup:{{[ ]+}}; preds = %[[LPAD_LABEL]], %try.cont
; CHECK: %a2 = getelementptr inbounds <{ %struct.A }>, <{ %struct.A }>* %0, i32 0, i32 0
; CHECK: call x86_thiscallcc void @"\01??1A@@QAE@XZ"(%struct.A* %a2)
; CHECK: [[TMP1:\%.+]] = load i32, i32* [[RETVAL]]
; CHECK: ret i32 [[TMP1]]
cleanup: ; preds = %try.cont, %catch
%a2 = getelementptr inbounds <{ %struct.A }>, <{ %struct.A }>* %0, i32 0, i32 0
call x86_thiscallcc void @"\01??1A@@QAE@XZ"(%struct.A* %a2) #3
%tmp10 = load i32, i32* %retval
ret i32 %tmp10
; CHECK-NOT: ehcleanup:
ehcleanup: ; preds = %catch.dispatch
%a3 = getelementptr inbounds <{ %struct.A }>, <{ %struct.A }>* %0, i32 0, i32 0
call x86_thiscallcc void @"\01??1A@@QAE@XZ"(%struct.A* %a3) #3
br label %eh.resume
; CHECK-NOT: eh.resume:
eh.resume: ; preds = %ehcleanup
%exn2 = load i8*, i8** %exn.slot
%sel3 = load i32, i32* %ehselector.slot
%lpad.val = insertvalue { i8*, i32 } undef, i8* %exn2, 0
%lpad.val4 = insertvalue { i8*, i32 } %lpad.val, i32 %sel3, 1
resume { i8*, i32 } %lpad.val4
; CHECK: }
}
; The following catch handler should be outlined.
; CHECK: define internal i8* @"\01?test@@YAHUA@@@Z.catch"(i8*, i8*)
; CHECK: entry:
; CHECK: [[RECOVER_E:\%.+]] = call i8* @llvm.framerecover(i8* bitcast (i32 (<{ %struct.A }>*)* @"\01?test@@YAHUA@@@Z" to i8*), i8* %1, i32 0)
; CHECK: [[E_PTR:\%.+]] = bitcast i8* [[RECOVER_E]] to i32*
; CHECK: [[RECOVER_EH_TEMP:\%.+]] = call i8* @llvm.framerecover(i8* bitcast (i32 (<{ %struct.A }>*)* @"\01?test@@YAHUA@@@Z" to i8*), i8* %1, i32 1)
; CHECK: [[EH_TEMP:\%.+]] = bitcast i8* [[RECOVER_EH_TEMP]] to <{ %struct.A }>**
; CHECK: [[RECOVER_RETVAL:\%.+]] = call i8* @llvm.framerecover(i8* bitcast (i32 (<{ %struct.A }>*)* @"\01?test@@YAHUA@@@Z" to i8*), i8* %1, i32 2)
; CHECK: [[RETVAL1:\%.+]] = bitcast i8* [[RECOVER_RETVAL]] to i32*
; CHECK: [[RECOVER_CLEANUPSLOT:\%.+]] = call i8* @llvm.framerecover(i8* bitcast (i32 (<{ %struct.A }>*)* @"\01?test@@YAHUA@@@Z" to i8*), i8* %1, i32 3)
; CHECK: [[CLEANUPSLOT1:\%.+]] = bitcast i8* [[RECOVER_CLEANUPSLOT]] to i32*
; CHECK: [[E_I8PTR:\%.+]] = bitcast i32* [[E_PTR]] to i8*
; CHECK: [[TMP_RELOAD:\%.+]] = load <{ %struct.A }>*, <{ %struct.A }>** [[EH_TEMP]]
; CHECK: [[RECOVER_A:\%.+]] = getelementptr inbounds <{ %struct.A }>, <{ %struct.A }>* [[TMP_RELOAD]], i32 0, i32 0
; CHECK: [[A1:\%.+]] = getelementptr inbounds %struct.A, %struct.A* [[RECOVER_A]], i32 0, i32 0
; CHECK: [[TMP2:\%.+]] = load i32, i32* [[A1]], align 4
; CHECK: [[TMP3:\%.+]] = load i32, i32* [[E_PTR]], align 4
; CHECK: [[ADD:\%.+]] = add nsw i32 [[TMP2]], [[TMP3]]
; CHECK: store i32 [[ADD]], i32* [[RETVAL1]]
; CHECK: store i32 1, i32* [[CLEANUPSLOT1]]
; CHECK: ret i8* blockaddress(@"\01?test@@YAHUA@@@Z", %cleanup)
; CHECK: }
; The following cleanup handler should be outlined.
; CHECK: define internal void @"\01?test@@YAHUA@@@Z.cleanup"(i8*, i8*)
; CHECK: entry:
; CHECK: [[RECOVER_EH_TEMP1:\%.+]] = call i8* @llvm.framerecover(i8* bitcast (i32 (<{ %struct.A }>*)* @"\01?test@@YAHUA@@@Z" to i8*), i8* %1, i32 1)
; CHECK: [[EH_TEMP1:\%.+]] = bitcast i8* [[RECOVER_EH_TEMP]] to <{ %struct.A }>**
; CHECK: [[TMP_RELOAD1:\%.+]] = load <{ %struct.A }>*, <{ %struct.A }>** [[EH_TEMP1]]
; CHECK: [[A3:\%.+]] = getelementptr inbounds <{ %struct.A }>, <{ %struct.A }>* [[TMP_RELOAD1]], i32 0, i32 0
; CHECK: call x86_thiscallcc void @"\01??1A@@QAE@XZ"(%struct.A* [[A3]])
; CHECK: ret void
; CHECK: }
declare void @"\01?may_throw@@YAXXZ"() #0
declare i32 @__CxxFrameHandler3(...)
; Function Attrs: nounwind readnone
declare i32 @llvm.eh.typeid.for(i8*) #1
declare void @llvm.eh.begincatch(i8*, i8*)
declare void @llvm.eh.endcatch()
; Function Attrs: nounwind
declare x86_thiscallcc void @"\01??1A@@QAE@XZ"(%struct.A*) #2
attributes #0 = { "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 = { nounwind readnone }
attributes #2 = { nounwind "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 #3 = { nounwind }
!llvm.ident = !{!0}
!0 = !{!"clang version 3.7.0 (trunk 228868)"}
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