71568a9e28
This patch contains all of the clang changes from D72959. - Generalize the relative vtables ABI such that it can be used by other targets. - Add an enum VTableComponentLayout which controls whether components in the vtable should be pointers to other structs or relative offsets to those structs. Other ABIs can change this enum to restructure how components in the vtable are laid out/accessed. - Add methods to ConstantInitBuilder for inserting relative offsets to a specified position in the aggregate being constructed. - Fix failing tests under new PM and ASan and MSan issues. See D72959 for background info. Differential Revision: https://reviews.llvm.org/D77592
30 lines
1.4 KiB
C++
30 lines
1.4 KiB
C++
// Inline comdat method definition example.
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// The VTable is in a comdat and defined anywhere the inline definition is.
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// RUN: %clang_cc1 %s -triple=aarch64-unknown-fuchsia -O1 -S -o - -emit-llvm -fexperimental-relative-c++-abi-vtables | FileCheck %s
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// CHECK: $_ZN1A3fooEv.stub = comdat any
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// CHECK: $_ZTV1A = comdat any
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// CHECK: $_ZTS1A = comdat any
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// CHECK: $_ZTI1A = comdat any
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// CHECK: $_ZTI1A.rtti_proxy = comdat any
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// The VTable is linkonce_odr and in a comdat here bc it’s key function is inline defined.
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// CHECK: @_ZTV1A.local = linkonce_odr hidden unnamed_addr constant { [3 x i32] } { [3 x i32] [i32 0, i32 trunc (i64 sub (i64 ptrtoint ({ i8*, i8* }** @_ZTI1A.rtti_proxy to i64), i64 ptrtoint (i32* getelementptr inbounds ({ [3 x i32] }, { [3 x i32] }* @_ZTV1A.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (void (%class.A*)* @_ZN1A3fooEv.stub to i64), i64 ptrtoint (i32* getelementptr inbounds ({ [3 x i32] }, { [3 x i32] }* @_ZTV1A.local, i32 0, i32 0, i32 2) to i64)) to i32)] }, comdat($_ZTV1A), align 4
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// CHECK: @_ZTV1A = linkonce_odr unnamed_addr alias { [3 x i32] }, { [3 x i32] }* @_ZTV1A.local
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// CHECK: define hidden void @_ZN1A3fooEv.stub(%class.A* {{.*}}%0) unnamed_addr #{{[0-9]+}} comdat
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class A {
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public:
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virtual void foo();
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};
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void A_foo(A *a);
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inline void A::foo() {}
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void func() {
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A a;
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A_foo(&a);
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}
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