75 lines · c
1// RUN: %clang_cc1 -triple x86_64-windows -fsyntax-only -verify %s2// RUN: %clang_cc1 -triple x86_64-linux -verify -emit-llvm-only -DCHECK_ALIASES %s3// RUN: %clang_cc1 -triple x86_64-linux -verify -emit-llvm-only %s4// RUN: %clang_cc1 -triple x86_64-apple-macosx -verify -emit-llvm-only %s5// RUN: %clang_cc1 -triple aarch64-none-linux-gnu -verify -emit-llvm-only %s6// RUN: %clang_cc1 -triple aarch64-pc-windows-msvcu -verify -emit-llvm-only %s7 8#if defined(_WIN32) && !defined(__aarch64__)9void foo(void) {}10void bar(void) __attribute__((ifunc("foo")));11// expected-warning@-1 {{unknown attribute 'ifunc' ignored}}12 13#else14#if defined(CHECK_ALIASES)15void *f1_ifunc(void);16void f1(void) __attribute__((ifunc("f1_ifunc")));17// expected-error@-1 {{ifunc must point to a defined function}}18// expected-note@-2 {{must refer to its mangled name}}19 20void *f2_a(void) __attribute__((alias("f2_b")));21void *f2_b(void) __attribute__((ifunc("f2_a")));22// expected-error@-1 {{ifunc definition is part of a cycle}}23 24void *f3_a(void) __attribute__((ifunc("f3_b")));25// expected-warning@-1 {{ifunc will always resolve to f3_c even if weak definition of f3_b is overridden}}26void *f3_b(void) __attribute__((weak, alias("f3_c")));27void *f3_c(void) { return 0; }28 29void f4_ifunc(void) {}30void f4(void) __attribute__((ifunc("f4_ifunc")));31// expected-error@-1 {{ifunc resolver function must return a pointer}}32 33int f5_resolver_gvar;34void f5(void) __attribute__((ifunc("f5_resolver_gvar")));35// expected-error@-1 {{ifunc must point to a defined function}}36 37void *f6_resolver_resolver(void) { return 0; }38void *f6_resolver(void) __attribute__((ifunc("f6_resolver_resolver")));39void f6(void) __attribute__((ifunc("f6_resolver")));40// expected-error@-1 {{ifunc must point to a defined function}}41 42#elif defined(__APPLE__)43 44// NOTE: aliases are not supported on Darwin, so the above tests are not relevant.45 46#define STR2(X) #X47#define STR(X) STR2(X)48#define PREFIX STR(__USER_LABEL_PREFIX__)49 50void f1a(void) __asm("f1");51void f1a(void) {}52// expected-note@-1 {{previous definition is here}}53void f1(void) __attribute__((ifunc(PREFIX "f1_ifunc"))) __asm("f1");54// expected-error@-1 {{definition with same mangled name '<U+0001>f1' as another definition}}55void *f1_ifunc(void) { return 0; }56 57void *f6_ifunc(int i);58void __attribute__((ifunc(PREFIX "f6_ifunc"))) f6(void) {}59// expected-error@-1 {{definition 'f6' cannot also be an ifunc}}60 61#else62void f1a(void) __asm("f1");63void f1a(void) {}64// expected-note@-1 {{previous definition is here}}65void f1(void) __attribute__((ifunc("f1_ifunc")));66// expected-error@-1 {{definition with same mangled name 'f1' as another definition}}67void *f1_ifunc(void) { return 0; }68 69void *f6_ifunc(int i);70void __attribute__((ifunc("f6_ifunc"))) f6(void) {}71// expected-error@-1 {{definition 'f6' cannot also be an ifunc}}72 73#endif74#endif75