16d0381841
The original change was reverted because it was discovered that clang mishandles thunks, and they receive wrong attributes for their this/return types - the ones for the function they will call, not the ones they have. While i have tried to fix this in https://reviews.llvm.org/D100388 that patch has been up and stuck for a month now, with little signs of progress. So while it will be good to solve this for real, for now we can simply avoid introducing the bug, by not annotating this/return for thunks. This reverts commit6270b3a1ea, relanding0aa0458f14.
94 lines
2.5 KiB
C++
94 lines
2.5 KiB
C++
// RUN: %clang_cc1 -S -emit-llvm %s -triple x86_64-unknown-linux-gnu -o - | FileCheck %s
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class A {
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public:
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[[clang::nomerge]] A();
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[[clang::nomerge]] virtual ~A();
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[[clang::nomerge]] void f();
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[[clang::nomerge]] virtual void g();
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[[clang::nomerge]] static void f1();
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};
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class B : public A {
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public:
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void g() override;
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};
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bool bar();
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[[clang::nomerge]] void f(bool, bool);
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void foo(int i, A *ap, B *bp) {
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[[clang::nomerge]] bar();
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[[clang::nomerge]] (i = 4, bar());
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[[clang::nomerge]] (void)(bar());
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f(bar(), bar());
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[[clang::nomerge]] [] { bar(); bar(); }(); // nomerge only applies to the anonymous function call
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[[clang::nomerge]] for (bar(); bar(); bar()) {}
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[[clang::nomerge]] { asm("nop"); }
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bar();
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ap->g();
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bp->g();
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A a;
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a.f();
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a.g();
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A::f1();
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B b;
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b.g();
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A *newA = new B();
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delete newA;
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}
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int g(int i);
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void something() {
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g(1);
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}
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[[clang::nomerge]] int g(int i);
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void something_else() {
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g(1);
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}
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int g(int i) { return i; }
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void something_else_again() {
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g(1);
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}
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// CHECK: call zeroext i1 @_Z3barv() #[[ATTR0:[0-9]+]]
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// CHECK: call zeroext i1 @_Z3barv() #[[ATTR0]]
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// CHECK: call zeroext i1 @_Z3barv() #[[ATTR0]]
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// CHECK: call zeroext i1 @_Z3barv(){{$}}
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// CHECK: call zeroext i1 @_Z3barv(){{$}}
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// CHECK: call void @_Z1fbb({{.*}}) #[[ATTR0]]
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// CHECK: call void @"_ZZ3fooiP1AP1BENK3$_0clEv"{{.*}} #[[ATTR0]]
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// CHECK: call zeroext i1 @_Z3barv() #[[ATTR0]]
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// CHECK-LABEL: for.cond:
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// CHECK: call zeroext i1 @_Z3barv() #[[ATTR0]]
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// CHECK-LABEL: for.inc:
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// CHECK: call zeroext i1 @_Z3barv() #[[ATTR0]]
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// CHECK: call void asm sideeffect "nop"{{.*}} #[[ATTR1:[0-9]+]]
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// CHECK: call zeroext i1 @_Z3barv(){{$}}
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// CHECK: %[[AG:.*]] = load void (%class.A*)*, void (%class.A*)**
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// CHECK-NEXT: call void %[[AG]](%class.A* {{.*}}) #[[ATTR0]]
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// CHECK: %[[BG:.*]] = load void (%class.B*)*, void (%class.B*)**
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// CHECK-NEXT: call void %[[BG]](%class.B* nonnull align {{.*}} dereferenceable
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// CHECK: call void @_ZN1AC1Ev({{.*}}) #[[ATTR0]]
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// CHECK: call void @_ZN1A1fEv({{.*}}) #[[ATTR0]]
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// CHECK: call void @_ZN1A1gEv({{.*}}) #[[ATTR0]]
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// CHECK: call void @_ZN1A2f1Ev() #[[ATTR0]]
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// CHECK: call void @_ZN1BC1Ev({{.*}}){{$}}
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// CHECK: call void @_ZN1B1gEv({{.*}}){{$}}
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// CHECK: call void @_ZN1BC1Ev({{.*}}){{$}}
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// CHECK: %[[AG:.*]] = load void (%class.A*)*, void (%class.A*)**
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// CHECK-NEXT: call void %[[AG]](%class.A* {{.*}}) #[[ATTR1]]
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// CHECK: call void @_ZN1AD1Ev(%class.A* {{.*}}) #[[ATTR1]]
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// CHECK-DAG: attributes #[[ATTR0]] = {{{.*}}nomerge{{.*}}}
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// CHECK-DAG: attributes #[[ATTR1]] = {{{.*}}nomerge{{.*}}}
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