44 lines
2.3 KiB
C++
44 lines
2.3 KiB
C++
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// Cross comdat example
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// Parent VTable is in a comdat section.
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// RUN: %clang_cc1 %s -triple=aarch64-unknown-fuchsia -O1 -S -o - -emit-llvm -fexperimental-relative-c++-abi-vtables -fhalf-no-semantic-interposition | FileCheck %s
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// The inline function is emitted in each module with the same comdat
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// CHECK: $_ZTS1A = comdat any
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// CHECK: $_ZTI1A = comdat any
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// CHECK: $_ZTI1B.rtti_proxy = comdat any
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// The VTable is emitted everywhere used
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// CHECK: $_ZTV1A = comdat any
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// CHECK: $_ZTI1A.rtti_proxy = comdat any
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// The VTable for B is emitted here since it has a key function which is defined in this module
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// CHECK: @_ZTV1B.local = private unnamed_addr constant { [3 x i32] } { [3 x i32] [i32 0, i32 trunc (i64 sub (i64 ptrtoint ({ i8*, i8*, i8* }** @_ZTI1B.rtti_proxy to i64), i64 ptrtoint (i32* getelementptr inbounds ({ [3 x i32] }, { [3 x i32] }* @_ZTV1B.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (void (%class.B*)* dso_local_equivalent @_ZN1B3fooEv to i64), i64 ptrtoint (i32* getelementptr inbounds ({ [3 x i32] }, { [3 x i32] }* @_ZTV1B.local, i32 0, i32 0, i32 2) to i64)) to i32)] }, align 4
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// The VTable for A is emitted here and in a comdat section since it has no key function, and is used in this module when creating an instance of A (in func()).
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// CHECK: @_ZTV1A.local = linkonce_odr hidden unnamed_addr constant { [3 x i32] } { [3 x i32] [i32 0, i32 trunc (i64 sub (i64 ptrtoint ({ i8*, i8* }** @_ZTI1A.rtti_proxy to i64), i64 ptrtoint (i32* getelementptr inbounds ({ [3 x i32] }, { [3 x i32] }* @_ZTV1A.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (void (%class.A*)* dso_local_equivalent @_ZN1A3fooEv to i64), i64 ptrtoint (i32* getelementptr inbounds ({ [3 x i32] }, { [3 x i32] }* @_ZTV1A.local, i32 0, i32 0, i32 2) to i64)) to i32)] }, comdat($_ZTV1A), align 4
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// CHECK: @_ZTV1B ={{.*}} unnamed_addr alias { [3 x i32] }, { [3 x i32] }* @_ZTV1B.local
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// CHECK: @_ZTV1A = linkonce_odr unnamed_addr alias { [3 x i32] }, { [3 x i32] }* @_ZTV1A.local
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// CHECK: define{{.*}} void @_ZN1B3fooEv(%class.B* {{.*}}%this) unnamed_addr
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// CHECK-NEXT: entry:
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// CHECK-NEXT: ret void
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// CHECK-NEXT: }
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class A {
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public:
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inline virtual void foo() {}
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};
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class B : public A {
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public:
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void foo() override;
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};
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void A_foo(A *a);
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void B::foo() {}
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void func2() {
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A a;
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A_foo(&a);
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}
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