a624cec56d
As it was discovered in post-commit feedback for 0aa0458f1429372038ca6a4edc7e94c96cd9a753, we handle thunks incorrectly, and end up annotating their this/return with attributes that are valid for their callees, not for thunks themselves. While it would be good to fix this properly, and keep annotating them on thunks, i've tried doing that in https://reviews.llvm.org/D100388 with little success, and the patch is stuck for a month now. So for now, as a stopgap measure, subj.
114 lines
5.5 KiB
C++
114 lines
5.5 KiB
C++
// RUN: %clang_cc1 %s -fno-rtti -triple=i686-pc-win32 -emit-llvm -o - | FileCheck --check-prefix=CHECK32 %s
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// RUN: %clang_cc1 %s -fno-rtti -triple=x86_64-pc-win32 -emit-llvm -o - | FileCheck --check-prefix=CHECK64 %s
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namespace byval_thunk {
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struct Agg {
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Agg();
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Agg(const Agg &);
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~Agg();
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int x;
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};
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struct A { virtual void foo(Agg x); };
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struct B { virtual void foo(Agg x); };
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struct C : A, B { C(); virtual void foo(Agg x); };
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C::C() {} // force emission
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// CHECK32-LABEL: define linkonce_odr dso_local x86_thiscallcc void @"?foo@C@byval_thunk@@W3AEXUAgg@2@@Z"
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// CHECK32: (%"struct.byval_thunk::C"* %this, <{ %"struct.byval_thunk::Agg" }>* inalloca(<{ %"struct.byval_thunk::Agg" }>) %0)
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// CHECK32: getelementptr i8, i8* %{{.*}}, i32 -4
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// CHECK32: musttail call x86_thiscallcc void @"?foo@C@byval_thunk@@UAEXUAgg@2@@Z"
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// CHECK32: (%"struct.byval_thunk::C"* %{{.*}}, <{ %"struct.byval_thunk::Agg" }>* inalloca(<{ %"struct.byval_thunk::Agg" }>) %0)
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// CHECK32-NEXT: ret void
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// CHECK64-LABEL: define linkonce_odr dso_local void @"?foo@C@byval_thunk@@W7EAAXUAgg@2@@Z"
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// CHECK64: (%"struct.byval_thunk::C"* %this, %"struct.byval_thunk::Agg"* %x)
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// CHECK64: getelementptr i8, i8* %{{.*}}, i32 -8
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// CHECK64: call void @"?foo@C@byval_thunk@@UEAAXUAgg@2@@Z"
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// CHECK64: (%"struct.byval_thunk::C"* {{[^,]*}} %{{.*}}, %"struct.byval_thunk::Agg"* %x)
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// CHECK64-NOT: call
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// CHECK64: ret void
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}
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namespace stdcall_thunk {
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struct Agg {
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Agg();
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Agg(const Agg &);
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~Agg();
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int x;
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};
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struct A { virtual void __stdcall foo(Agg x); };
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struct B { virtual void __stdcall foo(Agg x); };
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struct C : A, B { C(); virtual void __stdcall foo(Agg x); };
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C::C() {} // force emission
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// CHECK32-LABEL: define linkonce_odr dso_local x86_stdcallcc void @"?foo@C@stdcall_thunk@@W3AGXUAgg@2@@Z"
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// CHECK32: (<{ %"struct.stdcall_thunk::C"*, %"struct.stdcall_thunk::Agg" }>* inalloca(<{ %"struct.stdcall_thunk::C"*, %"struct.stdcall_thunk::Agg" }>) %0)
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// CHECK32: %[[this_slot:[^ ]*]] = getelementptr inbounds <{ %"struct.stdcall_thunk::C"*, %"struct.stdcall_thunk::Agg" }>, <{ %"struct.stdcall_thunk::C"*, %"struct.stdcall_thunk::Agg" }>* %0, i32 0, i32 0
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// CHECK32: load %"struct.stdcall_thunk::C"*, %"struct.stdcall_thunk::C"** %[[this_slot]]
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// CHECK32: getelementptr i8, i8* %{{.*}}, i32 -4
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// CHECK32: store %"struct.stdcall_thunk::C"* %{{.*}}, %"struct.stdcall_thunk::C"** %[[this_slot]]
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// CHECK32: musttail call x86_stdcallcc void @"?foo@C@stdcall_thunk@@UAGXUAgg@2@@Z"
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// CHECK32: (<{ %"struct.stdcall_thunk::C"*, %"struct.stdcall_thunk::Agg" }>* inalloca(<{ %"struct.stdcall_thunk::C"*, %"struct.stdcall_thunk::Agg" }>) %0)
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// CHECK32-NEXT: ret void
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// CHECK64-LABEL: define linkonce_odr dso_local void @"?foo@C@stdcall_thunk@@W7EAAXUAgg@2@@Z"
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// CHECK64: (%"struct.stdcall_thunk::C"* %this, %"struct.stdcall_thunk::Agg"* %x)
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// CHECK64: getelementptr i8, i8* %{{.*}}, i32 -8
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// CHECK64: call void @"?foo@C@stdcall_thunk@@UEAAXUAgg@2@@Z"
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// CHECK64: (%"struct.stdcall_thunk::C"* {{[^,]*}} %{{.*}}, %"struct.stdcall_thunk::Agg"* %x)
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// CHECK64-NOT: call
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// CHECK64: ret void
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}
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namespace sret_thunk {
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struct Agg {
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Agg();
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Agg(const Agg &);
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~Agg();
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int x;
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};
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struct A { virtual Agg __cdecl foo(Agg x); };
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struct B { virtual Agg __cdecl foo(Agg x); };
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struct C : A, B { C(); virtual Agg __cdecl foo(Agg x); };
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C::C() {} // force emission
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// CHECK32-LABEL: define linkonce_odr dso_local %"struct.sret_thunk::Agg"* @"?foo@C@sret_thunk@@W3AA?AUAgg@2@U32@@Z"
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// CHECK32: (<{ %"struct.sret_thunk::C"*, %"struct.sret_thunk::Agg"*, %"struct.sret_thunk::Agg" }>* inalloca(<{ %"struct.sret_thunk::C"*, %"struct.sret_thunk::Agg"*, %"struct.sret_thunk::Agg" }>) %0)
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// CHECK32: %[[this_slot:[^ ]*]] = getelementptr inbounds <{ %"struct.sret_thunk::C"*, %"struct.sret_thunk::Agg"*, %"struct.sret_thunk::Agg" }>, <{ %"struct.sret_thunk::C"*, %"struct.sret_thunk::Agg"*, %"struct.sret_thunk::Agg" }>* %0, i32 0, i32 0
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// CHECK32: load %"struct.sret_thunk::C"*, %"struct.sret_thunk::C"** %[[this_slot]]
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// CHECK32: getelementptr i8, i8* %{{.*}}, i32 -4
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// CHECK32: store %"struct.sret_thunk::C"* %{{.*}}, %"struct.sret_thunk::C"** %[[this_slot]]
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// CHECK32: %[[rv:[^ ]*]] = musttail call %"struct.sret_thunk::Agg"* @"?foo@C@sret_thunk@@UAA?AUAgg@2@U32@@Z"
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// CHECK32: (<{ %"struct.sret_thunk::C"*, %"struct.sret_thunk::Agg"*, %"struct.sret_thunk::Agg" }>* inalloca(<{ %"struct.sret_thunk::C"*, %"struct.sret_thunk::Agg"*, %"struct.sret_thunk::Agg" }>) %0)
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// CHECK32-NEXT: ret %"struct.sret_thunk::Agg"* %[[rv]]
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// CHECK64-LABEL: define linkonce_odr dso_local void @"?foo@C@sret_thunk@@W7EAA?AUAgg@2@U32@@Z"
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// CHECK64: (%"struct.sret_thunk::C"* %this, %"struct.sret_thunk::Agg"* noalias sret(%"struct.sret_thunk::Agg") align 4 %agg.result, %"struct.sret_thunk::Agg"* %x)
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// CHECK64: getelementptr i8, i8* %{{.*}}, i32 -8
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// CHECK64: call void @"?foo@C@sret_thunk@@UEAA?AUAgg@2@U32@@Z"
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// CHECK64: (%"struct.sret_thunk::C"* {{[^,]*}} %{{.*}}, %"struct.sret_thunk::Agg"* sret(%"struct.sret_thunk::Agg") align 4 %agg.result, %"struct.sret_thunk::Agg"* %x)
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// CHECK64-NOT: call
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// CHECK64: ret void
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}
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#if 0
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// FIXME: When we extend LLVM IR to allow forwarding of varargs through musttail
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// calls, use this test.
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namespace variadic_thunk {
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struct Agg {
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Agg();
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Agg(const Agg &);
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~Agg();
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int x;
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};
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struct A { virtual void foo(Agg x, ...); };
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struct B { virtual void foo(Agg x, ...); };
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struct C : A, B { C(); virtual void foo(Agg x, ...); };
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C::C() {} // force emission
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}
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#endif
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