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

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// RUN: %clang_cc1 -emit-llvm -triple i386-linux-gnu %s -o - | FileCheck %s
// RUN: %clang_cc1 -x c++ -emit-pch -triple i386-linux-gnu -o %t %s
// RUN: %clang_cc1 -include-pch %t %s -triple i386-linux-gnu -emit-llvm -o - | FileCheck %s
// expected-no-diagnostics
#ifndef HEADER
#define HEADER
/// foo: declarations only
__attribute__((assume("foo:before1"))) void foo();
__attribute__((assume("foo:before2")))
__attribute__((assume("foo:before3"))) void
foo();
/// baz: static function declarations and a definition
__attribute__((assume("baz:before1"))) static void baz();
__attribute__((assume("baz:before2")))
__attribute__((assume("baz:before3"))) static void
baz();
// Definition
__attribute__((assume("baz:def1,baz:def2"))) static void baz() { foo(); }
__attribute__((assume("baz:after"))) static void baz();
/// bar: external function declarations and a definition
__attribute__((assume("bar:before1"))) void bar();
__attribute__((assume("bar:before2")))
__attribute__((assume("bar:before3"))) void
bar();
// Definition
__attribute__((assume("bar:def1,bar:def2"))) void bar() { baz(); }
__attribute__((assume("bar:after"))) void bar();
/// back to foo
__attribute__((assume("foo:after"))) void foo();
/// class tests
class C {
__attribute__((assume("C:private_method"))) void private_method();
__attribute__((assume("C:private_static"))) static void private_static();
public:
__attribute__((assume("C:public_method1"))) void public_method();
__attribute__((assume("C:public_static1"))) static void public_static();
};
__attribute__((assume("C:public_method2"))) void C::public_method() {
private_method();
}
__attribute__((assume("C:public_static2"))) void C::public_static() {
private_static();
}
/// template tests
template <typename T>
__attribute__((assume("template_func<T>"))) void template_func() {}
template <>
__attribute__((assume("template_func<float>"))) void template_func<float>() {}
template <>
void template_func<int>() {}
template <typename T>
struct S {
__attribute__((assume("S<T>::method"))) void method();
};
template <>
__attribute__((assume("S<float>::method"))) void S<float>::method() {}
template <>
void S<int>::method() {}
// CHECK: define{{.*}} void @_Z3barv() #0
// CHECK: define{{.*}} void @_ZL3bazv() #1
// CHECK: define{{.*}} void @_ZN1C13public_methodEv({{.*}}) #2
// CHECK: declare{{.*}} void @_ZN1C14private_methodEv({{.*}}) #3
// CHECK: define{{.*}} void @_ZN1C13public_staticEv() #4
// CHECK: declare{{.*}} void @_ZN1C14private_staticEv() #5
// CHECK: define{{.*}} void @_Z13template_funcIfEvv() #6
// CHECK: define{{.*}} void @_Z13template_funcIiEvv() #7
// CHECK: define{{.*}} void @_ZN1SIfE6methodEv({{.*}}) #8
// CHECK: define{{.*}} void @_ZN1SIiE6methodEv({{.*}}) #9
// CHECK: declare{{.*}} void @_Z3foov() #10
// CHECK: attributes #0
// CHECK-SAME: "llvm.assume"="bar:before1,bar:before2,bar:before3,bar:def1,bar:def2"
// CHECK: attributes #1
// CHECK-SAME: "llvm.assume"="baz:before1,baz:before2,baz:before3,baz:def1,baz:def2,baz:after"
// CHECK: attributes #2
// CHECK-SAME: "llvm.assume"="C:public_method1,C:public_method2"
// CHECK: attributes #3
// CHECK-SAME: "llvm.assume"="C:private_method"
// CHECK: attributes #4
// CHECK-SAME: "llvm.assume"="C:public_static1,C:public_static2"
// CHECK: attributes #5
// CHECK-SAME: "llvm.assume"="C:private_static"
// CHECK: attributes #6
// CHECK-SAME: "llvm.assume"="template_func<T>,template_func<float>"
// CHECK: attributes #7
// CHECK-SAME: "llvm.assume"="template_func<T>"
// CHECK: attributes #8
// CHECK-SAME: "llvm.assume"="S<T>::method,S<float>::method"
// CHECK: attributes #9
// CHECK-SAME: "llvm.assume"="S<T>::method"
// CHECK: attributes #10
// CHECK-SAME: "llvm.assume"="foo:before1,foo:before2,foo:before3"
#endif