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llvm-project/clang/test/CodeGenCXX/builtin_FUNCTION.cpp

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Implement __builtin_LINE() et. al. to support source location capture. Summary: This patch implements the source location builtins `__builtin_LINE(), `__builtin_FUNCTION()`, `__builtin_FILE()` and `__builtin_COLUMN()`. These builtins are needed to implement [`std::experimental::source_location`](https://rawgit.com/cplusplus/fundamentals-ts/v2/main.html#reflection.src_loc.creation). With the exception of `__builtin_COLUMN`, GCC also implements these builtins, and Clangs behavior is intended to match as closely as possible. Reviewers: rsmith, joerg, aaron.ballman, bogner, majnemer, shafik, martong Reviewed By: rsmith Subscribers: rnkovacs, loskutov, riccibruno, mgorny, kunitoki, alexr, majnemer, hfinkel, cfe-commits Differential Revision: https://reviews.llvm.org/D37035 llvm-svn: 360937
2019-05-17 05:04:15 +08:00
// RUN: %clang_cc1 -std=c++2a -fblocks %s -triple %itanium_abi_triple -emit-llvm -o %t.ll
// RUN: FileCheck --input-file %t.ll %s
namespace test_func {
constexpr const char *test_default_arg(const char *f = __builtin_FUNCTION()) {
return f;
}
// CHECK: @[[EMPTY_STR:.+]] = private unnamed_addr constant [1 x i8] zeroinitializer, align 1
// CHECK: @_ZN9test_func6globalE = global i8* getelementptr inbounds ([1 x i8], [1 x i8]* @[[EMPTY_STR]], i32 0, i32 0), align 8
const char *global = test_default_arg();
// CHECK: @_ZN9test_func10global_twoE = global i8* getelementptr inbounds ([1 x i8], [1 x i8]* @[[EMPTY_STR]], i32 0, i32 0), align 8
const char *global_two = __builtin_FUNCTION();
const char * const global_three = test_default_arg();
// CHECK: @[[STR_ONE:.+]] = private unnamed_addr constant [14 x i8] c"test_func_one\00", align 1
// CHECK: @[[STR_TWO:.+]] = private unnamed_addr constant [14 x i8] c"test_func_two\00", align 1
// CHECK: @[[STR_THREE:.+]] = private unnamed_addr constant [20 x i8] c"do_default_arg_test\00", align 1
// CHECK: define i8* @_ZN9test_func13test_func_oneEv()
// CHECK: ret i8* getelementptr inbounds ([14 x i8], [14 x i8]* @[[STR_ONE]], i32 0, i32 0)
const char *test_func_one() {
return __builtin_FUNCTION();
}
// CHECK: define i8* @_ZN9test_func13test_func_twoEv()
// CHECK: ret i8* getelementptr inbounds ([14 x i8], [14 x i8]* @[[STR_TWO]], i32 0, i32 0)
const char *test_func_two() {
return __builtin_FUNCTION();
}
// CHECK: define void @_ZN9test_func19do_default_arg_testEv()
// CHECK: %call = call i8* @_ZN9test_func16test_default_argEPKc(i8* getelementptr inbounds ([20 x i8], [20 x i8]* @[[STR_THREE]], i32 0, i32 0))
void do_default_arg_test() {
test_default_arg();
}
} // namespace test_func