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llvm-project/clang/test/Modules/codegen-extern-template.cpp

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fix recent -fmodules-codegen fix test
2020-01-15 06:46:35 +08:00
// RUN: %clang_cc1 -triple=x86_64-linux-gnu -fmodules -fmodules-codegen -emit-module -fmodule-name=foo %S/Inputs/codegen-extern-template.modulemap -x c++ -o %t.pcm
Revert "[CodeGenModule] Assume dso_local for -fpic -fno-semantic-interposition" This reverts commit 789a46f2d742e11edaade28cb59a0f4d2a1d770e. Accidentally committed.
2020-02-04 02:09:39 +08:00
// RUN: %clang_cc1 -triple x86_64-linux-gnu -fmodules -fmodule-file=%t.pcm %s -emit-llvm -o - | FileCheck %s
-fmodules-codegen should not emit extern templates If a header contains 'extern template', then the template should be provided somewhere by an explicit instantiation, so it is not necessary to generate a copy. Worse, this can lead to an unresolved symbol, because the codegen's object file will not actually contain functions from such a template because of the GVA_AvailableExternally, but the object file for the explicit instantiation will not contain them either because it will be blocked by the information provided by the module. Differential Revision: https://reviews.llvm.org/D69779
2019-11-04 03:47:40 +08:00
// expected-no-diagnostics
#include "codegen-extern-template.h"
template int foo<int>();
// CHECK: define weak_odr i32 @_Z3fooIiET_v