1 // RUN: %clang_cc1 -triple x86_64-windows -fsyntax-only -verify %s 2 // RUN: %clang_cc1 -triple x86_64-linux -fsyntax-only -verify -emit-llvm-only -DCHECK_ALIASES %s 3 // RUN: %clang_cc1 -triple x86_64-linux -fsyntax-only -verify -emit-llvm-only %s 4 5 #if defined(_WIN32) 6 void foo(void) {} 7 void bar(void) __attribute__((ifunc("foo"))); 8 // expected-warning@-1 {{unknown attribute 'ifunc' ignored}} 9 10 #else 11 #if defined(CHECK_ALIASES) 12 void *f1_ifunc(void); 13 void f1(void) __attribute__((ifunc("f1_ifunc"))); 14 // expected-error@-1 {{ifunc must point to a defined function}} 15 16 void *f2_a(void) __attribute__((alias("f2_b"))); 17 void *f2_b(void) __attribute__((ifunc("f2_a"))); 18 // expected-error@-1 {{ifunc definition is part of a cycle}} 19 20 void *f3_a(void) __attribute__((ifunc("f3_b"))); 21 // expected-warning@-1 {{ifunc will always resolve to f3_c even if weak definition of f3_b is overridden}} 22 void *f3_b(void) __attribute__((weak, alias("f3_c"))); 23 void *f3_c(void) { return 0; } 24 25 void f4_ifunc(void) {} 26 void f4(void) __attribute__((ifunc("f4_ifunc"))); 27 // expected-error@-1 {{ifunc resolver function must return a pointer}} 28 29 int f5_resolver_gvar; 30 void f5(void) __attribute__((ifunc("f5_resolver_gvar"))); 31 // expected-error@-1 {{ifunc must point to a defined function}} 32 33 void *f6_resolver_resolver(void) { return 0; } 34 void *f6_resolver(void) __attribute__((ifunc("f6_resolver_resolver"))); 35 void f6(void) __attribute__((ifunc("f6_resolver"))); 36 // expected-error@-1 {{ifunc must point to a defined function}} 37 38 #else 39 void f1a(void) __asm("f1"); 40 void f1a(void) {} 41 // expected-note@-1 {{previous definition is here}} 42 void f1(void) __attribute__((ifunc("f1_ifunc"))); 43 // expected-error@-1 {{definition with same mangled name 'f1' as another definition}} 44 void *f1_ifunc(void) { return 0; } 45 46 void *f6_ifunc(int i); 47 void __attribute__((ifunc("f6_ifunc"))) f6(void) {} 48 // expected-error@-1 {{definition 'f6' cannot also be an ifunc}} 49 50 #endif 51 #endif 52