003c0b9307
Motivation:
```
int test(int x, int y) {
int r = 0;
[[clang::always_inline]] r += foo(x, y); // force compiler to inline this function here
return r;
}
```
In 2018, @kuhar proposed "Introduce per-callsite inline intrinsics" in https://reviews.llvm.org/D51200 to solve this motivation case (and many others).
This patch solves this problem with call site attribute. "noinline" statement attribute already landed in D119061. Also, some LLVM Inliner fixes landed so call site attribute is stronger than function attribute.
Reviewed By: aaron.ballman
Differential Revision: https://reviews.llvm.org/D120717
28 lines
1.8 KiB
C++
28 lines
1.8 KiB
C++
// RUN: %clang_cc1 -verify -fsyntax-only %s
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int bar();
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[[gnu::always_inline]] void always_inline_fn(void) {}
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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::always_inline]] bar();
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[[clang::always_inline(0)]] bar(); // expected-error {{'always_inline' attribute takes no arguments}}
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int x;
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[[clang::always_inline]] int i = bar(); // expected-warning {{'always_inline' attribute only applies to functions and statements}}
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[[clang::always_inline]] x = 0; // expected-warning {{'always_inline' attribute is ignored because there exists no call expression inside the statement}}
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[[clang::always_inline]] { asm("nop"); } // expected-warning {{'always_inline' attribute is ignored because there exists no call expression inside the statement}}
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[[clang::always_inline]] label : x = 1; // expected-warning {{'always_inline' attribute only applies to functions and statements}}
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[[clang::always_inline]] always_inline_fn();
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[[clang::always_inline]] noinline_fn(); // expected-warning {{statement attribute 'always_inline' has higher precedence than function attribute 'noinline'}}
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[[clang::always_inline]] flatten_fn(); // expected-warning {{statement attribute 'always_inline' has higher precedence than function attribute 'flatten'}}
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[[gnu::always_inline]] bar(); // expected-warning {{attribute is ignored on this statement as it only applies to functions; use '[[clang::always_inline]]' on statements}}
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__attribute__((always_inline)) bar(); // expected-warning {{attribute is ignored on this statement as it only applies to functions; use '[[clang::always_inline]]' on statements}}
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}
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[[clang::always_inline]] static int i = bar(); // expected-warning {{'always_inline' attribute only applies to functions and statements}}
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