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
24 lines
1.5 KiB
C++
24 lines
1.5 KiB
C++
// The VTable is not in a comdat but the inline methods are.
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// This doesn’t affect the vtable or the stubs we emit.
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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: $_ZN1A3barEv.stub = comdat any
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// CHECK: $_ZTI1A.rtti_proxy = comdat any
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// The vtable has a key function (A::foo()) so it does not have a comdat
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// CHECK: @_ZTV1A.local = private unnamed_addr constant { [4 x i32] } { [4 x i32] [i32 0, i32 trunc (i64 sub (i64 ptrtoint ({ i8*, i8* }** @_ZTI1A.rtti_proxy to i64), i64 ptrtoint (i32* getelementptr inbounds ({ [4 x i32] }, { [4 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 ({ [4 x i32] }, { [4 x i32] }* @_ZTV1A.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (void (%class.A*)* @_ZN1A3barEv.stub to i64), i64 ptrtoint (i32* getelementptr inbounds ({ [4 x i32] }, { [4 x i32] }* @_ZTV1A.local, i32 0, i32 0, i32 2) to i64)) to i32)] }, align 4
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// CHECK: @_ZTV1A = unnamed_addr alias { [4 x i32] }, { [4 x i32] }* @_ZTV1A.local
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// We do not declare the stub with linkonce_odr so it can be emitted as .globl.
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// CHECK: define hidden void @_ZN1A3barEv.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(); // Key func
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inline virtual void bar() {}
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};
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void A::foo() {}
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