da00c60dae
Close https://github.com/llvm/llvm-project/issues/71034 See https://discourse.llvm.org/t/rfc-c-20-modules-introduce-thin-bmi-and-decls-hash/74755 This patch introduces reduced BMI, which doesn't contain the definitions of functions and variables if its definitions won't contribute to the ABI. Testing is a big part of the patch. We want to make sure the reduced BMI contains the same behavior with the existing and relatively stable fatBMI. This is pretty helpful for further reduction. The user interfaces part it left to following patches to ease the reviewing.
58 lines
2.0 KiB
C++
58 lines
2.0 KiB
C++
// Test case from https://github.com/llvm/llvm-project/issues/59999
|
|
//
|
|
// RUN: rm -rf %t
|
|
// RUN: mkdir -p %t
|
|
// RUN: split-file %s %t
|
|
//
|
|
// RUN: %clang_cc1 -std=c++20 -triple %itanium_abi_triple %t/Module.cppm \
|
|
// RUN: -emit-module-interface -o %t/Module.pcm
|
|
// RUN: %clang_cc1 -std=c++20 -triple %itanium_abi_triple %t/Object.cppm \
|
|
// RUN: -fmodule-file=Module=%t/Module.pcm -emit-module-interface -o %t/Object.pcm
|
|
// RUN: %clang_cc1 -std=c++20 -triple %itanium_abi_triple %t/Object.pcm \
|
|
// RUN: -fmodule-file=Module=%t/Module.pcm -S -emit-llvm -o - | FileCheck %t/Object.cppm
|
|
|
|
// Test again with reduced BMI.
|
|
// RUN: rm -rf %t
|
|
// RUN: mkdir -p %t
|
|
// RUN: split-file %s %t
|
|
//
|
|
// RUN: %clang_cc1 -std=c++20 -triple %itanium_abi_triple %t/Module.cppm \
|
|
// RUN: -emit-reduced-module-interface -o %t/Module.pcm
|
|
// RUN: %clang_cc1 -std=c++20 -triple %itanium_abi_triple %t/Object.cppm \
|
|
// RUN: -fmodule-file=Module=%t/Module.pcm -emit-module-interface -o %t/Object.pcm
|
|
// RUN: %clang_cc1 -std=c++20 -triple %itanium_abi_triple %t/Object.pcm \
|
|
// RUN: -fmodule-file=Module=%t/Module.pcm -S -emit-llvm -o - | FileCheck %t/Object.cppm
|
|
|
|
|
|
//--- Module.cppm
|
|
export module Module;
|
|
|
|
export template <class ObjectType> bool ModuleRegister() { return true; };
|
|
|
|
export struct ModuleEntry {
|
|
static const bool bRegistered;
|
|
};
|
|
|
|
const bool ModuleEntry::bRegistered = ModuleRegister<ModuleEntry>();
|
|
|
|
//--- Object.cppm
|
|
export module Object;
|
|
|
|
import Module;
|
|
|
|
export template <class ObjectType> bool ObjectRegister() { return true; }
|
|
export struct NObject {
|
|
static const bool bRegistered;
|
|
};
|
|
export struct ObjectModuleEntry {
|
|
static const bool bRegistered;
|
|
};
|
|
|
|
// This function is also required for crash
|
|
const bool NObject::bRegistered = ObjectRegister<NObject>();
|
|
// One another function, that helps clang crash
|
|
const bool ObjectModuleEntry::bRegistered = ModuleRegister<ObjectModuleEntry>();
|
|
|
|
// Check that the LLVM IR is generated correctly instead of crashing.
|
|
// CHECK: define{{.*}}@_ZGIW6Object
|