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[CodeGen] Make non-COMDAT relative vtable internal instead of private (#102056)

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When using the relative vtable ABI, if a vtable is not dso_local, it's
given private linkage (if not COMDAT) or hidden visibility (if COMDAT)
to make it dso_local (to place it in rodata instead of data.rel.ro), and
an alias generated with the original linkage and visibility. This alias
could later be removed from the symbol table, e.g. if using a version
script, at which point we lose all symbol information about the vtable.
Use internal linkage instead of private linkage to avoid this.

While I'm here, clarify the comment about why COMDAT vtables can't use
internal (or private) linkage, and associate it with the else block
where hidden visibility is applied instead of internal linkage.
This commit is contained in:
Shoaib Meenai 2024-08-06 12:58:04 -07:00 committed by GitHub
parent 2601d6f189
commit 0371dff995
No known key found for this signature in database
GPG Key ID: B5690EEEBB952194
16 changed files with 33 additions and 30 deletions
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19
clang/lib/CodeGen/CGVTables.cpp
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@ -1013,7 +1013,7 @@ void CodeGenVTables::RemoveHwasanMetadata(llvm::GlobalValue *GV) const {
// the VTable does not need a relocation and move into rodata. A frequent
// time this can occur is for classes that should be made public from a DSO
// (like in libc++). For cases like these, we can make the vtable hidden or
// private and create a public alias with the same visibility and linkage as
// internal and create a public alias with the same visibility and linkage as
// the original vtable type.
void CodeGenVTables::GenerateRelativeVTableAlias(llvm::GlobalVariable *VTable,
llvm::StringRef AliasNameRef) {
@ -1050,15 +1050,18 @@ void CodeGenVTables::GenerateRelativeVTableAlias(llvm::GlobalVariable *VTable,
VTableAlias->setVisibility(VTable->getVisibility());
VTableAlias->setUnnamedAddr(VTable->getUnnamedAddr());
// Both of these imply dso_local for the vtable.
// Both of these will now imply dso_local for the vtable.
if (!VTable->hasComdat()) {
// If this is in a comdat, then we shouldn't make the linkage private due to
// an issue in lld where private symbols can be used as the key symbol when
// choosing the prevelant group. This leads to "relocation refers to a
// symbol in a discarded section".
VTable->setLinkage(llvm::GlobalValue::PrivateLinkage);
VTable->setLinkage(llvm::GlobalValue::InternalLinkage);
} else {
// We should at least make this hidden since we don't want to expose it.
// If a relocation targets an internal linkage symbol, MC will generate the
// relocation against the symbol's section instead of the symbol itself
// (see ELFObjectWriter::shouldRelocateWithSymbol). If an internal symbol is
// in a COMDAT section group, that section might be discarded, and then the
// relocation to that section will generate a linker error. We therefore
// make COMDAT vtables hidden instead of internal: they'll still not be
// public, but relocations will reference the symbol instead of the section
// and COMDAT deduplication will thus work as expected.
VTable->setVisibility(llvm::GlobalValue::HiddenVisibility);
}

2
clang/test/CodeGenCXX/OmitRTTIComponentABI/simple-vtable-definition.cpp
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@ -11,7 +11,7 @@
///
/// Now vtables should have just two components.
// POINTER: @_ZTV1A = unnamed_addr constant { [2 x ptr] } { [2 x ptr] [ptr null, ptr @_ZN1A3fooEv] }, align 8
// RELATIVE: @_ZTV1A.local = private unnamed_addr constant { [2 x i32] } { [2 x i32] [i32 0, i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1A3fooEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [2 x i32] }, ptr @_ZTV1A.local, i32 0, i32 0, i32 1) to i64)) to i32)] }, align 4
// RELATIVE: @_ZTV1A.local = internal unnamed_addr constant { [2 x i32] } { [2 x i32] [i32 0, i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1A3fooEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [2 x i32] }, ptr @_ZTV1A.local, i32 0, i32 0, i32 1) to i64)) to i32)] }, align 4
// RELATIVE: @_ZTV1A = unnamed_addr alias { [2 x i32] }, ptr @_ZTV1A.local
/// None of these supplementary symbols should be emitted with -fno-rtti, but

2
clang/test/CodeGenCXX/RelativeVTablesABI/child-inheritted-from-parent-in-comdat.cpp
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@ -13,7 +13,7 @@
// CHECK: $_ZTI1A.rtti_proxy = comdat any
// The VTable for B is emitted here since it has a key function which is defined in this module
// CHECK: @_ZTV1B.local = private unnamed_addr constant { [3 x i32] } { [3 x i32] [i32 0, i32 trunc (i64 sub (i64 ptrtoint (ptr @_ZTI1B.rtti_proxy to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [3 x i32] }, ptr @_ZTV1B.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1B3fooEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [3 x i32] }, ptr @_ZTV1B.local, i32 0, i32 0, i32 2) to i64)) to i32)] }, align 4
// CHECK: @_ZTV1B.local = internal unnamed_addr constant { [3 x i32] } { [3 x i32] [i32 0, i32 trunc (i64 sub (i64 ptrtoint (ptr @_ZTI1B.rtti_proxy to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [3 x i32] }, ptr @_ZTV1B.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1B3fooEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [3 x i32] }, ptr @_ZTV1B.local, i32 0, i32 0, i32 2) to i64)) to i32)] }, align 4
// The VTable for A is emitted here and in a comdat section since it has no key function, and is used in this module when creating an instance of A (in func()).
// CHECK: @_ZTV1A.local = linkonce_odr hidden unnamed_addr constant { [3 x i32] } { [3 x i32] [i32 0, i32 trunc (i64 sub (i64 ptrtoint (ptr @_ZTI1A.rtti_proxy to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [3 x i32] }, ptr @_ZTV1A.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1A3fooEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [3 x i32] }, ptr @_ZTV1A.local, i32 0, i32 0, i32 2) to i64)) to i32)] }, comdat($_ZTV1A), align 4

2
clang/test/CodeGenCXX/RelativeVTablesABI/cross-translation-unit-1.cpp
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@ -7,7 +7,7 @@
// CHECK: $_ZTI1A.rtti_proxy = comdat any
// CHECK: @_ZTV1A.local = private unnamed_addr constant { [4 x i32] } { [4 x i32] [i32 0, i32 trunc (i64 sub (i64 ptrtoint (ptr @_ZTI1A.rtti_proxy to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32] }, ptr @_ZTV1A.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1A3fooEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32] }, ptr @_ZTV1A.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1A3barEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32] }, ptr @_ZTV1A.local, i32 0, i32 0, i32 2) to i64)) to i32)] }, align 4
// CHECK: @_ZTV1A.local = internal unnamed_addr constant { [4 x i32] } { [4 x i32] [i32 0, i32 trunc (i64 sub (i64 ptrtoint (ptr @_ZTI1A.rtti_proxy to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32] }, ptr @_ZTV1A.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1A3fooEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32] }, ptr @_ZTV1A.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1A3barEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32] }, ptr @_ZTV1A.local, i32 0, i32 0, i32 2) to i64)) to i32)] }, align 4
// @_ZTV1A ={{.*}} unnamed_addr alias { [4 x i32] }, ptr @_ZTV1A.local
void A::foo() {}

2
clang/test/CodeGenCXX/RelativeVTablesABI/cross-translation-unit-2.cpp
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@ -7,7 +7,7 @@
// CHECK: $_ZTI1B.rtti_proxy = comdat any
// CHECK: @_ZTV1B.local = private unnamed_addr constant { [4 x i32] } { [4 x i32] [i32 0, i32 trunc (i64 sub (i64 ptrtoint (ptr @_ZTI1B.rtti_proxy to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32] }, ptr @_ZTV1B.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1B3fooEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32] }, ptr @_ZTV1B.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1A3barEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32] }, ptr @_ZTV1B.local, i32 0, i32 0, i32 2) to i64)) to i32)] }, align 4
// CHECK: @_ZTV1B.local = internal unnamed_addr constant { [4 x i32] } { [4 x i32] [i32 0, i32 trunc (i64 sub (i64 ptrtoint (ptr @_ZTI1B.rtti_proxy to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32] }, ptr @_ZTV1B.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1B3fooEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32] }, ptr @_ZTV1B.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1A3barEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32] }, ptr @_ZTV1B.local, i32 0, i32 0, i32 2) to i64)) to i32)] }, align 4
// CHECK: @_ZTV1B ={{.*}} unnamed_addr alias { [4 x i32] }, ptr @_ZTV1B.local
// A::bar() is defined outside of the module that defines the vtable for A

6
clang/test/CodeGenCXX/RelativeVTablesABI/diamond-inheritance.cpp
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@ -4,16 +4,16 @@
// RUN: %clang_cc1 %s -triple=aarch64-unknown-fuchsia -O1 -o - -emit-llvm -fhalf-no-semantic-interposition | FileCheck %s
// VTable for B should contain offset to top (0), RTTI pointer, A::foo(), and B::barB().
// CHECK: @_ZTV1B.local = private unnamed_addr constant { [4 x i32] } { [4 x i32] [i32 0, i32 trunc (i64 sub (i64 ptrtoint (ptr @_ZTI1B.rtti_proxy to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32] }, ptr @_ZTV1B.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1A3fooEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32] }, ptr @_ZTV1B.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1B4barBEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32] }, ptr @_ZTV1B.local, i32 0, i32 0, i32 2) to i64)) to i32)] }, align 4
// CHECK: @_ZTV1B.local = internal unnamed_addr constant { [4 x i32] } { [4 x i32] [i32 0, i32 trunc (i64 sub (i64 ptrtoint (ptr @_ZTI1B.rtti_proxy to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32] }, ptr @_ZTV1B.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1A3fooEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32] }, ptr @_ZTV1B.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1B4barBEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32] }, ptr @_ZTV1B.local, i32 0, i32 0, i32 2) to i64)) to i32)] }, align 4
// VTable for C should contain offset to top (0), RTTI pointer, A::foo(), and C::barC().
// CHECK: @_ZTV1C.local = private unnamed_addr constant { [4 x i32] } { [4 x i32] [i32 0, i32 trunc (i64 sub (i64 ptrtoint (ptr @_ZTI1C.rtti_proxy to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32] }, ptr @_ZTV1C.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1A3fooEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32] }, ptr @_ZTV1C.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1C4barCEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32] }, ptr @_ZTV1C.local, i32 0, i32 0, i32 2) to i64)) to i32)] }, align 4
// CHECK: @_ZTV1C.local = internal unnamed_addr constant { [4 x i32] } { [4 x i32] [i32 0, i32 trunc (i64 sub (i64 ptrtoint (ptr @_ZTI1C.rtti_proxy to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32] }, ptr @_ZTV1C.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1A3fooEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32] }, ptr @_ZTV1C.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1C4barCEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32] }, ptr @_ZTV1C.local, i32 0, i32 0, i32 2) to i64)) to i32)] }, align 4
// VTable for D should be similar to the mutiple inheritance example where this
// vtable contains 2 inner vtables:
// - 1st table containing D::foo(), B::barB(), and D::baz().
// - 2nd table containing a thunk to D::foo() and C::barC().
// CHECK: @_ZTV1D.local = private unnamed_addr constant { [5 x i32], [4 x i32] } { [5 x i32] [i32 0, i32 trunc (i64 sub (i64 ptrtoint (ptr @_ZTI1D.rtti_proxy to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [5 x i32], [4 x i32] }, ptr @_ZTV1D.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1D3fooEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [5 x i32], [4 x i32] }, ptr @_ZTV1D.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1B4barBEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [5 x i32], [4 x i32] }, ptr @_ZTV1D.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1D3bazEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [5 x i32], [4 x i32] }, ptr @_ZTV1D.local, i32 0, i32 0, i32 2) to i64)) to i32)], [4 x i32] [i32 -8, i32 trunc (i64 sub (i64 ptrtoint (ptr @_ZTI1D.rtti_proxy to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [5 x i32], [4 x i32] }, ptr @_ZTV1D.local, i32 0, i32 1, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZThn8_N1D3fooEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [5 x i32], [4 x i32] }, ptr @_ZTV1D.local, i32 0, i32 1, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1C4barCEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [5 x i32], [4 x i32] }, ptr @_ZTV1D.local, i32 0, i32 1, i32 2) to i64)) to i32)] }, align 4
// CHECK: @_ZTV1D.local = internal unnamed_addr constant { [5 x i32], [4 x i32] } { [5 x i32] [i32 0, i32 trunc (i64 sub (i64 ptrtoint (ptr @_ZTI1D.rtti_proxy to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [5 x i32], [4 x i32] }, ptr @_ZTV1D.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1D3fooEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [5 x i32], [4 x i32] }, ptr @_ZTV1D.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1B4barBEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [5 x i32], [4 x i32] }, ptr @_ZTV1D.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1D3bazEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [5 x i32], [4 x i32] }, ptr @_ZTV1D.local, i32 0, i32 0, i32 2) to i64)) to i32)], [4 x i32] [i32 -8, i32 trunc (i64 sub (i64 ptrtoint (ptr @_ZTI1D.rtti_proxy to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [5 x i32], [4 x i32] }, ptr @_ZTV1D.local, i32 0, i32 1, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZThn8_N1D3fooEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [5 x i32], [4 x i32] }, ptr @_ZTV1D.local, i32 0, i32 1, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1C4barCEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [5 x i32], [4 x i32] }, ptr @_ZTV1D.local, i32 0, i32 1, i32 2) to i64)) to i32)] }, align 4
// @_ZTV1B ={{.*}} unnamed_addr alias { [4 x i32] }, ptr @_ZTV1B.local
// @_ZTV1C ={{.*}} unnamed_addr alias { [4 x i32] }, ptr @_ZTV1C.local

10
clang/test/CodeGenCXX/RelativeVTablesABI/diamond-virtual-inheritance.cpp
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@ -6,28 +6,28 @@
// Class A contains a vtable ptr, then int, then padding
// VTable for B. Contains an extra field at the start for the virtual-base offset.
// CHECK: @_ZTV1B.local = private unnamed_addr constant { [4 x i32], [4 x i32] } { [4 x i32] [i32 8, i32 0, i32 trunc (i64 sub (i64 ptrtoint (ptr @_ZTI1B.rtti_proxy to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32], [4 x i32] }, ptr @_ZTV1B.local, i32 0, i32 0, i32 3) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1B4barBEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32], [4 x i32] }, ptr @_ZTV1B.local, i32 0, i32 0, i32 3) to i64)) to i32)], [4 x i32] [i32 0, i32 -8, i32 trunc (i64 sub (i64 ptrtoint (ptr @_ZTI1B.rtti_proxy to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32], [4 x i32] }, ptr @_ZTV1B.local, i32 0, i32 1, i32 3) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1A3fooEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32], [4 x i32] }, ptr @_ZTV1B.local, i32 0, i32 1, i32 3) to i64)) to i32)] }, align 4
// CHECK: @_ZTV1B.local = internal unnamed_addr constant { [4 x i32], [4 x i32] } { [4 x i32] [i32 8, i32 0, i32 trunc (i64 sub (i64 ptrtoint (ptr @_ZTI1B.rtti_proxy to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32], [4 x i32] }, ptr @_ZTV1B.local, i32 0, i32 0, i32 3) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1B4barBEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32], [4 x i32] }, ptr @_ZTV1B.local, i32 0, i32 0, i32 3) to i64)) to i32)], [4 x i32] [i32 0, i32 -8, i32 trunc (i64 sub (i64 ptrtoint (ptr @_ZTI1B.rtti_proxy to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32], [4 x i32] }, ptr @_ZTV1B.local, i32 0, i32 1, i32 3) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1A3fooEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32], [4 x i32] }, ptr @_ZTV1B.local, i32 0, i32 1, i32 3) to i64)) to i32)] }, align 4
// VTT for B
// CHECK: @_ZTT1B ={{.*}} unnamed_addr constant [2 x ptr] [ptr getelementptr inbounds inrange(-12, 4) ({ [4 x i32], [4 x i32] }, ptr @_ZTV1B.local, i32 0, i32 0, i32 3), ptr getelementptr inbounds inrange(-12, 4) ({ [4 x i32], [4 x i32] }, ptr @_ZTV1B.local, i32 0, i32 1, i32 3)], align 8
// VTable for C
// CHECK: @_ZTV1C.local = private unnamed_addr constant { [4 x i32], [4 x i32] } { [4 x i32] [i32 8, i32 0, i32 trunc (i64 sub (i64 ptrtoint (ptr @_ZTI1C.rtti_proxy to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32], [4 x i32] }, ptr @_ZTV1C.local, i32 0, i32 0, i32 3) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1C4barCEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32], [4 x i32] }, ptr @_ZTV1C.local, i32 0, i32 0, i32 3) to i64)) to i32)], [4 x i32] [i32 0, i32 -8, i32 trunc (i64 sub (i64 ptrtoint (ptr @_ZTI1C.rtti_proxy to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32], [4 x i32] }, ptr @_ZTV1C.local, i32 0, i32 1, i32 3) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1A3fooEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32], [4 x i32] }, ptr @_ZTV1C.local, i32 0, i32 1, i32 3) to i64)) to i32)] }, align 4
// CHECK: @_ZTV1C.local = internal unnamed_addr constant { [4 x i32], [4 x i32] } { [4 x i32] [i32 8, i32 0, i32 trunc (i64 sub (i64 ptrtoint (ptr @_ZTI1C.rtti_proxy to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32], [4 x i32] }, ptr @_ZTV1C.local, i32 0, i32 0, i32 3) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1C4barCEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32], [4 x i32] }, ptr @_ZTV1C.local, i32 0, i32 0, i32 3) to i64)) to i32)], [4 x i32] [i32 0, i32 -8, i32 trunc (i64 sub (i64 ptrtoint (ptr @_ZTI1C.rtti_proxy to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32], [4 x i32] }, ptr @_ZTV1C.local, i32 0, i32 1, i32 3) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1A3fooEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32], [4 x i32] }, ptr @_ZTV1C.local, i32 0, i32 1, i32 3) to i64)) to i32)] }, align 4
// VTT for C
// CHECK: @_ZTT1C ={{.*}} unnamed_addr constant [2 x ptr] [ptr getelementptr inbounds inrange(-12, 4) ({ [4 x i32], [4 x i32] }, ptr @_ZTV1C.local, i32 0, i32 0, i32 3), ptr getelementptr inbounds inrange(-12, 4) ({ [4 x i32], [4 x i32] }, ptr @_ZTV1C.local, i32 0, i32 1, i32 3)], align 8
// VTable for D
// CHECK: @_ZTV1D.local = private unnamed_addr constant { [5 x i32], [4 x i32], [4 x i32] } { [5 x i32] [i32 16, i32 0, i32 trunc (i64 sub (i64 ptrtoint (ptr @_ZTI1D.rtti_proxy to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [5 x i32], [4 x i32], [4 x i32] }, ptr @_ZTV1D.local, i32 0, i32 0, i32 3) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1B4barBEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [5 x i32], [4 x i32], [4 x i32] }, ptr @_ZTV1D.local, i32 0, i32 0, i32 3) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1D3bazEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [5 x i32], [4 x i32], [4 x i32] }, ptr @_ZTV1D.local, i32 0, i32 0, i32 3) to i64)) to i32)], [4 x i32] [i32 8, i32 -8, i32 trunc (i64 sub (i64 ptrtoint (ptr @_ZTI1D.rtti_proxy to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [5 x i32], [4 x i32], [4 x i32] }, ptr @_ZTV1D.local, i32 0, i32 1, i32 3) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1C4barCEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [5 x i32], [4 x i32], [4 x i32] }, ptr @_ZTV1D.local, i32 0, i32 1, i32 3) to i64)) to i32)], [4 x i32] [i32 0, i32 -16, i32 trunc (i64 sub (i64 ptrtoint (ptr @_ZTI1D.rtti_proxy to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [5 x i32], [4 x i32], [4 x i32] }, ptr @_ZTV1D.local, i32 0, i32 2, i32 3) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1A3fooEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [5 x i32], [4 x i32], [4 x i32] }, ptr @_ZTV1D.local, i32 0, i32 2, i32 3) to i64)) to i32)] }, align 4
// CHECK: @_ZTV1D.local = internal unnamed_addr constant { [5 x i32], [4 x i32], [4 x i32] } { [5 x i32] [i32 16, i32 0, i32 trunc (i64 sub (i64 ptrtoint (ptr @_ZTI1D.rtti_proxy to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [5 x i32], [4 x i32], [4 x i32] }, ptr @_ZTV1D.local, i32 0, i32 0, i32 3) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1B4barBEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [5 x i32], [4 x i32], [4 x i32] }, ptr @_ZTV1D.local, i32 0, i32 0, i32 3) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1D3bazEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [5 x i32], [4 x i32], [4 x i32] }, ptr @_ZTV1D.local, i32 0, i32 0, i32 3) to i64)) to i32)], [4 x i32] [i32 8, i32 -8, i32 trunc (i64 sub (i64 ptrtoint (ptr @_ZTI1D.rtti_proxy to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [5 x i32], [4 x i32], [4 x i32] }, ptr @_ZTV1D.local, i32 0, i32 1, i32 3) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1C4barCEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [5 x i32], [4 x i32], [4 x i32] }, ptr @_ZTV1D.local, i32 0, i32 1, i32 3) to i64)) to i32)], [4 x i32] [i32 0, i32 -16, i32 trunc (i64 sub (i64 ptrtoint (ptr @_ZTI1D.rtti_proxy to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [5 x i32], [4 x i32], [4 x i32] }, ptr @_ZTV1D.local, i32 0, i32 2, i32 3) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1A3fooEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [5 x i32], [4 x i32], [4 x i32] }, ptr @_ZTV1D.local, i32 0, i32 2, i32 3) to i64)) to i32)] }, align 4
// VTT for D
// CHECK: @_ZTT1D ={{.*}} unnamed_addr constant [7 x ptr] [ptr getelementptr inbounds inrange(-12, 8) ({ [5 x i32], [4 x i32], [4 x i32] }, ptr @_ZTV1D.local, i32 0, i32 0, i32 3), ptr getelementptr inbounds inrange(-12, 4) ({ [4 x i32], [4 x i32] }, ptr @_ZTC1D0_1B.local, i32 0, i32 0, i32 3), ptr getelementptr inbounds inrange(-12, 4) ({ [4 x i32], [4 x i32] }, ptr @_ZTC1D0_1B.local, i32 0, i32 1, i32 3), ptr getelementptr inbounds inrange(-12, 4) ({ [4 x i32], [4 x i32] }, ptr @_ZTC1D8_1C.local, i32 0, i32 0, i32 3), ptr getelementptr inbounds inrange(-12, 4) ({ [4 x i32], [4 x i32] }, ptr @_ZTC1D8_1C.local, i32 0, i32 1, i32 3), ptr getelementptr inbounds inrange(-12, 4) ({ [5 x i32], [4 x i32], [4 x i32] }, ptr @_ZTV1D.local, i32 0, i32 2, i32 3), ptr getelementptr inbounds inrange(-12, 4) ({ [5 x i32], [4 x i32], [4 x i32] }, ptr @_ZTV1D.local, i32 0, i32 1, i32 3)], align 8
// Construction vtable for B-in-D
// CHECK: @_ZTC1D0_1B.local = private unnamed_addr constant { [4 x i32], [4 x i32] } { [4 x i32] [i32 16, i32 0, i32 trunc (i64 sub (i64 ptrtoint (ptr @_ZTI1B.rtti_proxy to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32], [4 x i32] }, ptr @_ZTC1D0_1B.local, i32 0, i32 0, i32 3) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1B4barBEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32], [4 x i32] }, ptr @_ZTC1D0_1B.local, i32 0, i32 0, i32 3) to i64)) to i32)], [4 x i32] [i32 0, i32 -16, i32 trunc (i64 sub (i64 ptrtoint (ptr @_ZTI1B.rtti_proxy to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32], [4 x i32] }, ptr @_ZTC1D0_1B.local, i32 0, i32 1, i32 3) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1A3fooEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32], [4 x i32] }, ptr @_ZTC1D0_1B.local, i32 0, i32 1, i32 3) to i64)) to i32)] }, align 4
// CHECK: @_ZTC1D0_1B.local = internal unnamed_addr constant { [4 x i32], [4 x i32] } { [4 x i32] [i32 16, i32 0, i32 trunc (i64 sub (i64 ptrtoint (ptr @_ZTI1B.rtti_proxy to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32], [4 x i32] }, ptr @_ZTC1D0_1B.local, i32 0, i32 0, i32 3) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1B4barBEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32], [4 x i32] }, ptr @_ZTC1D0_1B.local, i32 0, i32 0, i32 3) to i64)) to i32)], [4 x i32] [i32 0, i32 -16, i32 trunc (i64 sub (i64 ptrtoint (ptr @_ZTI1B.rtti_proxy to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32], [4 x i32] }, ptr @_ZTC1D0_1B.local, i32 0, i32 1, i32 3) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1A3fooEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32], [4 x i32] }, ptr @_ZTC1D0_1B.local, i32 0, i32 1, i32 3) to i64)) to i32)] }, align 4
// Construction vtable for C-in-D
// CHECK: @_ZTC1D8_1C.local = private unnamed_addr constant { [4 x i32], [4 x i32] } { [4 x i32] [i32 8, i32 0, i32 trunc (i64 sub (i64 ptrtoint (ptr @_ZTI1C.rtti_proxy to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32], [4 x i32] }, ptr @_ZTC1D8_1C.local, i32 0, i32 0, i32 3) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1C4barCEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32], [4 x i32] }, ptr @_ZTC1D8_1C.local, i32 0, i32 0, i32 3) to i64)) to i32)], [4 x i32] [i32 0, i32 -8, i32 trunc (i64 sub (i64 ptrtoint (ptr @_ZTI1C.rtti_proxy to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32], [4 x i32] }, ptr @_ZTC1D8_1C.local, i32 0, i32 1, i32 3) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1A3fooEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32], [4 x i32] }, ptr @_ZTC1D8_1C.local, i32 0, i32 1, i32 3) to i64)) to i32)] }, align 4
// CHECK: @_ZTC1D8_1C.local = internal unnamed_addr constant { [4 x i32], [4 x i32] } { [4 x i32] [i32 8, i32 0, i32 trunc (i64 sub (i64 ptrtoint (ptr @_ZTI1C.rtti_proxy to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32], [4 x i32] }, ptr @_ZTC1D8_1C.local, i32 0, i32 0, i32 3) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1C4barCEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32], [4 x i32] }, ptr @_ZTC1D8_1C.local, i32 0, i32 0, i32 3) to i64)) to i32)], [4 x i32] [i32 0, i32 -8, i32 trunc (i64 sub (i64 ptrtoint (ptr @_ZTI1C.rtti_proxy to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32], [4 x i32] }, ptr @_ZTC1D8_1C.local, i32 0, i32 1, i32 3) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1A3fooEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32], [4 x i32] }, ptr @_ZTC1D8_1C.local, i32 0, i32 1, i32 3) to i64)) to i32)] }, align 4
// CHECK: @_ZTV1B ={{.*}} unnamed_addr alias { [4 x i32], [4 x i32] }, ptr @_ZTV1B.local
// CHECK: @_ZTV1C ={{.*}} unnamed_addr alias { [4 x i32], [4 x i32] }, ptr @_ZTV1C.local

2
clang/test/CodeGenCXX/RelativeVTablesABI/inheritted-virtual-function.cpp
View File

@ -9,7 +9,7 @@ public:
};
// The VTable for B should look similar to the vtable for A but the component for foo() should point to A::foo() and the component for bar() should point to B::bar().
// CHECK: @_ZTV1B.local = private unnamed_addr constant { [4 x i32] } { [4 x i32] [i32 0, i32 trunc (i64 sub (i64 ptrtoint (ptr @_ZTI1B.rtti_proxy to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32] }, ptr @_ZTV1B.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1A3fooEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32] }, ptr @_ZTV1B.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1B3barEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32] }, ptr @_ZTV1B.local, i32 0, i32 0, i32 2) to i64)) to i32)] }, align 4
// CHECK: @_ZTV1B.local = internal unnamed_addr constant { [4 x i32] } { [4 x i32] [i32 0, i32 trunc (i64 sub (i64 ptrtoint (ptr @_ZTI1B.rtti_proxy to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32] }, ptr @_ZTV1B.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1A3fooEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32] }, ptr @_ZTV1B.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1B3barEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32] }, ptr @_ZTV1B.local, i32 0, i32 0, i32 2) to i64)) to i32)] }, align 4
// CHECK: @_ZTV1B ={{.*}} unnamed_addr alias { [4 x i32] }, ptr @_ZTV1B.local
class B : public A {

2
clang/test/CodeGenCXX/RelativeVTablesABI/inline-virtual-function.cpp
View File

@ -7,7 +7,7 @@
// CHECK: $_ZTI1A.rtti_proxy = comdat any
// The vtable has a key function (A::foo()) so it does not have a comdat
// CHECK: @_ZTV1A.local = private unnamed_addr constant { [4 x i32] } { [4 x i32] [i32 0, i32 trunc (i64 sub (i64 ptrtoint (ptr @_ZTI1A.rtti_proxy to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32] }, ptr @_ZTV1A.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1A3fooEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32] }, ptr @_ZTV1A.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1A3barEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32] }, ptr @_ZTV1A.local, i32 0, i32 0, i32 2) to i64)) to i32)] }, align 4
// CHECK: @_ZTV1A.local = internal unnamed_addr constant { [4 x i32] } { [4 x i32] [i32 0, i32 trunc (i64 sub (i64 ptrtoint (ptr @_ZTI1A.rtti_proxy to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32] }, ptr @_ZTV1A.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1A3fooEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32] }, ptr @_ZTV1A.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1A3barEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32] }, ptr @_ZTV1A.local, i32 0, i32 0, i32 2) to i64)) to i32)] }, align 4
// CHECK: @_ZTV1A ={{.*}} unnamed_addr alias { [4 x i32] }, ptr @_ZTV1A.local
class A {

2
clang/test/CodeGenCXX/RelativeVTablesABI/multiple-inheritance.cpp
View File

@ -5,7 +5,7 @@
// VTable for C contains 2 sub-vtables (represented as 2 structs). The first contains the components for B and the second contains the components for C. The RTTI ptr in both arrays still point to the RTTI struct for C.
// The component for bar() instead points to a thunk which redirects to C::bar() which overrides B::bar().
// Now that we have a class with 2 parents, the offset to top in the second array is non-zero.
// CHECK: @_ZTV1C.local = private unnamed_addr constant { [4 x i32], [3 x i32] } { [4 x i32] [i32 0, i32 trunc (i64 sub (i64 ptrtoint (ptr @_ZTI1C.rtti_proxy to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32], [3 x i32] }, ptr @_ZTV1C.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1C3fooEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32], [3 x i32] }, ptr @_ZTV1C.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1C3barEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32], [3 x i32] }, ptr @_ZTV1C.local, i32 0, i32 0, i32 2) to i64)) to i32)], [3 x i32] [i32 -8, i32 trunc (i64 sub (i64 ptrtoint (ptr @_ZTI1C.rtti_proxy to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32], [3 x i32] }, ptr @_ZTV1C.local, i32 0, i32 1, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZThn8_N1C3barEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32], [3 x i32] }, ptr @_ZTV1C.local, i32 0, i32 1, i32 2) to i64)) to i32)] }, align 4
// CHECK: @_ZTV1C.local = internal unnamed_addr constant { [4 x i32], [3 x i32] } { [4 x i32] [i32 0, i32 trunc (i64 sub (i64 ptrtoint (ptr @_ZTI1C.rtti_proxy to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32], [3 x i32] }, ptr @_ZTV1C.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1C3fooEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32], [3 x i32] }, ptr @_ZTV1C.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1C3barEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32], [3 x i32] }, ptr @_ZTV1C.local, i32 0, i32 0, i32 2) to i64)) to i32)], [3 x i32] [i32 -8, i32 trunc (i64 sub (i64 ptrtoint (ptr @_ZTI1C.rtti_proxy to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32], [3 x i32] }, ptr @_ZTV1C.local, i32 0, i32 1, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZThn8_N1C3barEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32], [3 x i32] }, ptr @_ZTV1C.local, i32 0, i32 1, i32 2) to i64)) to i32)] }, align 4
// CHECK: @_ZTV1C ={{.*}} unnamed_addr alias { [4 x i32], [3 x i32] }, ptr @_ZTV1C.local

2
clang/test/CodeGenCXX/RelativeVTablesABI/no-alias-when-dso-local.cpp
View File

@ -4,7 +4,7 @@
// RUN: %clang_cc1 %s -triple=aarch64-unknown-fuchsia -o - -emit-llvm -fhalf-no-semantic-interposition | FileCheck %s --check-prefix=DEFAULT-VIS
// RUN: %clang_cc1 %s -triple=aarch64-unknown-fuchsia -o - -emit-llvm -fvisibility=hidden | FileCheck %s --check-prefix=HIDDEN-VIS
// DEFAULT-VIS: @_ZTV1A.local = private unnamed_addr constant
// DEFAULT-VIS: @_ZTV1A.local = internal unnamed_addr constant
// DEFAULT-VIS: @_ZTV1A ={{.*}} unnamed_addr alias { [3 x i32] }, ptr @_ZTV1A.local
// HIDDEN-VIS-NOT: @_ZTV1A.local
// HIDDEN-VIS: @_ZTV1A = hidden unnamed_addr constant

4
clang/test/CodeGenCXX/RelativeVTablesABI/override-pure-virtual-method.cpp
View File

@ -4,9 +4,9 @@
// RUN: %clang_cc1 %s -triple=aarch64-unknown-fuchsia -O1 -o - -emit-llvm -fhalf-no-semantic-interposition | FileCheck %s
// CHECK: @_ZTV1A.local = private unnamed_addr constant { [4 x i32] } { [4 x i32] [i32 0, i32 trunc (i64 sub (i64 ptrtoint (ptr @_ZTI1A.rtti_proxy to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32] }, ptr @_ZTV1A.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 0, i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1A3barEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32] }, ptr @_ZTV1A.local, i32 0, i32 0, i32 2) to i64)) to i32)] }, align 4
// CHECK: @_ZTV1A.local = internal unnamed_addr constant { [4 x i32] } { [4 x i32] [i32 0, i32 trunc (i64 sub (i64 ptrtoint (ptr @_ZTI1A.rtti_proxy to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32] }, ptr @_ZTV1A.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 0, i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1A3barEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32] }, ptr @_ZTV1A.local, i32 0, i32 0, i32 2) to i64)) to i32)] }, align 4
// CHECK: @_ZTV1B.local = private unnamed_addr constant { [4 x i32] } { [4 x i32] [i32 0, i32 trunc (i64 sub (i64 ptrtoint (ptr @_ZTI1B.rtti_proxy to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32] }, ptr @_ZTV1B.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1B3fooEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32] }, ptr @_ZTV1B.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1B3barEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32] }, ptr @_ZTV1B.local, i32 0, i32 0, i32 2) to i64)) to i32)] }, align 4
// CHECK: @_ZTV1B.local = internal unnamed_addr constant { [4 x i32] } { [4 x i32] [i32 0, i32 trunc (i64 sub (i64 ptrtoint (ptr @_ZTI1B.rtti_proxy to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32] }, ptr @_ZTV1B.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1B3fooEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32] }, ptr @_ZTV1B.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1B3barEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32] }, ptr @_ZTV1B.local, i32 0, i32 0, i32 2) to i64)) to i32)] }, align 4
// CHECK: @_ZTV1A ={{.*}} unnamed_addr alias { [4 x i32] }, ptr @_ZTV1A.local
// CHECK: @_ZTV1B ={{.*}} unnamed_addr alias { [4 x i32] }, ptr @_ZTV1B.local

2
clang/test/CodeGenCXX/RelativeVTablesABI/overriden-virtual-function.cpp
View File

@ -3,7 +3,7 @@
// RUN: %clang_cc1 %s -triple=aarch64-unknown-fuchsia -O1 -o - -emit-llvm -fhalf-no-semantic-interposition | FileCheck %s
// CHECK: @_ZTV1B.local = private unnamed_addr constant { [4 x i32] } { [4 x i32] [i32 0, i32 trunc (i64 sub (i64 ptrtoint (ptr @_ZTI1B.rtti_proxy to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32] }, ptr @_ZTV1B.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1B3fooEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32] }, ptr @_ZTV1B.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1B3barEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32] }, ptr @_ZTV1B.local, i32 0, i32 0, i32 2) to i64)) to i32)] }, align 4
// CHECK: @_ZTV1B.local = internal unnamed_addr constant { [4 x i32] } { [4 x i32] [i32 0, i32 trunc (i64 sub (i64 ptrtoint (ptr @_ZTI1B.rtti_proxy to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32] }, ptr @_ZTV1B.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1B3fooEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32] }, ptr @_ZTV1B.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1B3barEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [4 x i32] }, ptr @_ZTV1B.local, i32 0, i32 0, i32 2) to i64)) to i32)] }, align 4
// CHECK: @_ZTV1B ={{.*}} unnamed_addr alias { [4 x i32] }, ptr @_ZTV1B.local

2
clang/test/CodeGenCXX/RelativeVTablesABI/relative-vtables-flag.cpp
View File

@ -7,7 +7,7 @@
// RUN: %clang_cc1 %s -triple=aarch64-unknown-fuchsia -o - -emit-llvm -fno-experimental-relative-c++-abi-vtables | FileCheck --check-prefix=DEFAULT-ABI %s
// VTable contains offsets and references to the hidden symbols
// RELATIVE-ABI: @_ZTV1A.local = private unnamed_addr constant { [3 x i32] } { [3 x i32] [i32 0, i32 trunc (i64 sub (i64 ptrtoint (ptr @_ZTI1A.rtti_proxy to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [3 x i32] }, ptr @_ZTV1A.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1A3fooEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [3 x i32] }, ptr @_ZTV1A.local, i32 0, i32 0, i32 2) to i64)) to i32)] }, align 4
// RELATIVE-ABI: @_ZTV1A.local = internal unnamed_addr constant { [3 x i32] } { [3 x i32] [i32 0, i32 trunc (i64 sub (i64 ptrtoint (ptr @_ZTI1A.rtti_proxy to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [3 x i32] }, ptr @_ZTV1A.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1A3fooEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [3 x i32] }, ptr @_ZTV1A.local, i32 0, i32 0, i32 2) to i64)) to i32)] }, align 4
// RELATIVE-ABI: @_ZTV1A ={{.*}} unnamed_addr alias { [3 x i32] }, ptr @_ZTV1A.local
// DEFAULT-ABI: @_ZTV1A ={{.*}} unnamed_addr constant { [3 x ptr] } { [3 x ptr] [ptr null, ptr @_ZTI1A, ptr @_ZN1A3fooEv] }, align 8

2
clang/test/CodeGenCXX/RelativeVTablesABI/relative-vtables-hwasan.cpp
View File

@ -4,7 +4,7 @@
/// vtable is hidden and the alias is made public. With hwasan enabled, we want
/// to ensure the local one self-referenced in the hidden vtable is not
/// hwasan-instrumented.
// CHECK-DAG: @_ZTV1A.local = private unnamed_addr constant { [3 x i32] } { [3 x i32] [i32 0, i32 trunc (i64 sub (i64 ptrtoint (ptr @_ZTI1A.rtti_proxy to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [3 x i32] }, ptr @_ZTV1A.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1A3fooEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [3 x i32] }, ptr @_ZTV1A.local, i32 0, i32 0, i32 2) to i64)) to i32)] }, no_sanitize_hwaddress, align 4
// CHECK-DAG: @_ZTV1A.local = internal unnamed_addr constant { [3 x i32] } { [3 x i32] [i32 0, i32 trunc (i64 sub (i64 ptrtoint (ptr @_ZTI1A.rtti_proxy to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [3 x i32] }, ptr @_ZTV1A.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1A3fooEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [3 x i32] }, ptr @_ZTV1A.local, i32 0, i32 0, i32 2) to i64)) to i32)] }, no_sanitize_hwaddress, align 4
// CHECK-DAG: @_ZTV1A = unnamed_addr alias { [3 x i32] }, ptr @_ZTV1A.local
// CHECK-DAG: @_ZTI1A.rtti_proxy = linkonce_odr hidden unnamed_addr constant ptr @_ZTI1A, no_sanitize_hwaddress, comdat

2
clang/test/CodeGenCXX/RelativeVTablesABI/simple-vtable-definition.cpp
View File

@ -8,7 +8,7 @@
// VTable contains offsets and references to the hidden symbols
// The vtable definition itself is private so we can take relative references to
// it. The vtable symbol will be exposed through a public alias.
// CHECK: @_ZTV1A.local = private unnamed_addr constant { [3 x i32] } { [3 x i32] [i32 0, i32 trunc (i64 sub (i64 ptrtoint (ptr @_ZTI1A.rtti_proxy to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [3 x i32] }, ptr @_ZTV1A.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1A3fooEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [3 x i32] }, ptr @_ZTV1A.local, i32 0, i32 0, i32 2) to i64)) to i32)] }, align 4
// CHECK: @_ZTV1A.local = internal unnamed_addr constant { [3 x i32] } { [3 x i32] [i32 0, i32 trunc (i64 sub (i64 ptrtoint (ptr @_ZTI1A.rtti_proxy to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [3 x i32] }, ptr @_ZTV1A.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1A3fooEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [3 x i32] }, ptr @_ZTV1A.local, i32 0, i32 0, i32 2) to i64)) to i32)] }, align 4
// CHECK: @_ZTVN10__cxxabiv117__class_type_infoE = external global [0 x ptr]
// CHECK: @_ZTS1A ={{.*}} constant [3 x i8] c"1A\00", align 1
// CHECK: @_ZTI1A ={{.*}} constant { ptr, ptr } { ptr getelementptr inbounds (i8, ptr @_ZTVN10__cxxabiv117__class_type_infoE, i32 8), ptr @_ZTS1A }, align 8