76 lines
3.6 KiB
C++
76 lines
3.6 KiB
C++
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// RUN: %clang_cc1 -verify -fsyntax-only %s -Wno-c++17-extensions
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int bar();
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// expected-note@+1{{conflicting attribute is here}}
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[[gnu::always_inline]] void always_inline_fn(void) { }
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// expected-note@+1{{conflicting attribute is here}}
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[[gnu::flatten]] void flatten_fn(void) { }
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[[gnu::noinline]] void noinline_fn(void) { }
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void foo() {
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[[clang::noinline]] bar();
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[[clang::noinline(0)]] bar(); // expected-error {{'noinline' attribute takes no arguments}}
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int x;
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[[clang::noinline]] x = 0; // expected-warning {{'noinline' attribute is ignored because there exists no call expression inside the statement}}
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[[clang::noinline]] { asm("nop"); } // expected-warning {{'noinline' attribute is ignored because there exists no call expression inside the statement}}
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[[clang::noinline]] label: x = 1; // expected-warning {{'noinline' attribute only applies to functions and statements}}
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[[clang::noinline]] always_inline_fn(); // expected-warning {{statement attribute 'noinline' has higher precedence than function attribute 'always_inline'}}
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[[clang::noinline]] flatten_fn(); // expected-warning {{statement attribute 'noinline' has higher precedence than function attribute 'flatten'}}
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[[clang::noinline]] noinline_fn();
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[[gnu::noinline]] bar(); // expected-warning {{attribute is ignored on this statement as it only applies to functions; use '[[clang::noinline]]' on statements}}
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__attribute__((noinline)) bar(); // expected-warning {{attribute is ignored on this statement as it only applies to functions; use '[[clang::noinline]]' on statements}}
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}
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[[clang::noinline]] static int i = bar(); // expected-warning {{'noinline' attribute only applies to functions and statements}}
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// This used to crash the compiler.
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template<int D>
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int foo(int x) {
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[[clang::noinline]] return foo<D-1>(x + 1);
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}
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template<int D>
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[[clang::always_inline]]
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int dependent(int x){ return x + D;} // #DEP
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[[clang::always_inline]]
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int non_dependent(int x){return x;} // #NO_DEP
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template<int D> [[clang::always_inline]]
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int baz(int x) { // #BAZ
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// expected-warning@+2{{statement attribute 'noinline' has higher precedence than function attribute 'always_inline'}}
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// expected-note@#NO_DEP{{conflicting attribute is here}}
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[[clang::noinline]] non_dependent(x);
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if constexpr (D>0) {
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// expected-warning@+6{{statement attribute 'noinline' has higher precedence than function attribute 'always_inline'}}
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// expected-note@#NO_DEP{{conflicting attribute is here}}
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// expected-warning@+4 3{{statement attribute 'noinline' has higher precedence than function attribute 'always_inline'}}
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// expected-note@#BAZ 3{{conflicting attribute is here}}
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// expected-note@#BAZ_INST 3{{in instantiation}}
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// expected-note@+1 3{{in instantiation}}
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[[clang::noinline]] return non_dependent(x), baz<D-1>(x + 1);
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}
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return x;
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}
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// We can't suppress if there is a variadic involved.
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template<int ... D>
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int variadic_baz(int x) {
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// Diagnoses NO_DEP 2x, once during phase 1, the second during instantiation.
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// Dianoses DEP 3x, once per variadic expansion.
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// expected-warning@+5 2{{statement attribute 'noinline' has higher precedence than function attribute 'always_inline'}}
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// expected-note@#NO_DEP 2{{conflicting attribute is here}}
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// expected-warning@+3 3{{statement attribute 'noinline' has higher precedence than function attribute 'always_inline'}}
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// expected-note@#DEP 3{{conflicting attribute is here}}
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// expected-note@#VARIADIC_INST{{in instantiation}}
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[[clang::noinline]] return non_dependent(x) + (dependent<D>(x) + ...);
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}
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void use() {
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baz<3>(0); // #BAZ_INST
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variadic_baz<0, 1, 2>(0); // #VARIADIC_INST
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}
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