fd739804e0
For a default visibility external linkage definition, dso_local is set for ELF
-fno-pic/-fpie and COFF and Mach-O. Since default clang -cc1 for ELF is similar
to -fpic ("PIC Level" is not set), this nuance causes unneeded binary format differences.
To make emitted IR similar, ELF -cc1 -fpic will default to -fno-semantic-interposition,
which sets dso_local for default visibility external linkage definitions.
To make this flip smooth and enable future (dso_local as definition default),
this patch replaces (function) `define ` with `define{{.*}} `,
(variable/constant/alias) `= ` with `={{.*}} `, or inserts appropriate `{{.*}} `.
46 lines
1.3 KiB
C
46 lines
1.3 KiB
C
// RUN: %clang_cc1 -triple x86_64-pc-linux -emit-llvm %s -o - | FileCheck %s
|
|
|
|
extern void foo_alias (void) __asm ("foo");
|
|
inline void foo (void) {
|
|
return foo_alias ();
|
|
}
|
|
extern int abs_alias (int) __asm ("abs");
|
|
inline __attribute__ ((__always_inline__)) int abs (int x) {
|
|
return abs_alias(x);
|
|
}
|
|
extern char *strrchr_foo (const char *__s, int __c) __asm ("strrchr");
|
|
extern inline __attribute__ ((__always_inline__)) __attribute__ ((__gnu_inline__)) char * strrchr_foo (const char *__s, int __c) {
|
|
return __builtin_strrchr (__s, __c);
|
|
}
|
|
|
|
extern inline void __attribute__((always_inline, __gnu_inline__))
|
|
prefetch(void) {
|
|
__builtin_prefetch(0, 0, 1);
|
|
}
|
|
|
|
extern inline __attribute__((__always_inline__, __gnu_inline__)) void *memchr(void *__s, int __c, __SIZE_TYPE__ __n) {
|
|
return __builtin_memchr(__s, __c, __n);
|
|
}
|
|
|
|
void f(void) {
|
|
foo();
|
|
abs(0);
|
|
strrchr_foo("", '.');
|
|
prefetch();
|
|
memchr("", '.', 0);
|
|
}
|
|
|
|
// CHECK-LABEL: define{{.*}} void @f()
|
|
// CHECK: call void @foo()
|
|
// CHECK: call i32 @abs(i32 0)
|
|
// CHECK: call i8* @strrchr(
|
|
// CHECK: call void @llvm.prefetch.p0i8(
|
|
// CHECK: call i8* @memchr(
|
|
// CHECK: ret void
|
|
|
|
// CHECK: declare void @foo()
|
|
// CHECK: declare i32 @abs(i32
|
|
// CHECK: declare i8* @strrchr(i8*, i32)
|
|
// CHECK: declare i8* @memchr(
|
|
// CHECK: declare void @llvm.prefetch.p0i8(
|