847f9cb0e8
Reland https://github.com/llvm/llvm-project/pull/75912 The differences of this PR between https://github.com/llvm/llvm-project/pull/75912 are: - Fixed a regression in `Decl::isInAnotherModuleUnit()` in DeclBase.cpp pointed by @mizvekov and add the corresponding test. - Fixed the regression in windows https://github.com/llvm/llvm-project/issues/97447. The changes are in `CodeGenModule::getVTableLinkage` from `clang/lib/CodeGen/CGVTables.cpp`. According to the feedbacks from MSVC devs, the linkage of vtables won't affected by modules. So I simply skipped the case for MSVC. Given this is more or less fundamental to the use of modules. I hope we can backport this to 19.x.
48 lines
1.7 KiB
C++
48 lines
1.7 KiB
C++
// REQUIRES: !system-windows
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// RUN: rm -rf %t
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// RUN: split-file %s %t
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// RUN: cd %t
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//
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// RUN: %clang_cc1 -std=c++20 %t/layer1.cppm -triple %itanium_abi_triple \
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// RUN: -emit-module-interface -o %t/foo-layer1.pcm
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// RUN: %clang_cc1 -std=c++20 %t/layer2.cppm -triple %itanium_abi_triple \
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// RUN: -emit-module-interface -fmodule-file=foo:layer1=%t/foo-layer1.pcm \
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// RUN: -o %t/foo-layer2.pcm
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// RUN: %clang_cc1 -std=c++20 %t/foo-layer1.pcm -emit-llvm -o - | FileCheck %t/layer1.cppm
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// RUN: %clang_cc1 -std=c++20 %t/foo-layer2.pcm -emit-llvm -o - \
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// RUN: -fmodule-file=foo:layer1=%t/foo-layer1.pcm | FileCheck %t/layer2.cppm
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//
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// Check the case about emitting object files from sources directly.
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// RUN: %clang_cc1 -std=c++20 %t/layer1.cppm -triple %itanium_abi_triple \
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// RUN: -emit-llvm -o - | FileCheck %t/layer1.cppm
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// RUN: %clang_cc1 -std=c++20 %t/layer2.cppm -triple %itanium_abi_triple -emit-llvm \
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// RUN: -fmodule-file=foo:layer1=%t/foo-layer1.pcm -o - | FileCheck %t/layer2.cppm
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//--- layer1.cppm
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export module foo:layer1;
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struct Fruit {
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virtual ~Fruit() = default;
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virtual void eval();
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};
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// CHECK-DAG: @_ZTVW3foo5Fruit = unnamed_addr constant
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// CHECK-DAG: @_ZTSW3foo5Fruit = constant
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// CHECK-DAG: @_ZTIW3foo5Fruit = constant
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// Testing that:
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// (1) The use of virtual functions won't produce the vtable.
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// (2) The definition of key functions won't produce the vtable.
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//
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//--- layer2.cppm
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export module foo:layer2;
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import :layer1;
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export void layer2_fun() {
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Fruit *b = new Fruit();
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b->eval();
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}
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void Fruit::eval() {}
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// CHECK: @_ZTVW3foo5Fruit = external unnamed_addr constant
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// CHECK-NOT: @_ZTSW3foo5Fruit
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// CHECK-NOT: @_ZTIW3foo5Fruit
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