1 // RUN: %clang_cc1 -triple i686-w64-mingw32 -emit-llvm -disable-llvm-passes -o - %s | FileCheck %s
2 //
3 // Verifies that clang detects memcpy inline version and uses it instead of the builtin.
4 // Checks that clang correctly walks through multiple forward declaration.
5
6 typedef unsigned int size_t;
7
8 void *memcpy(void *_Dst, const void *_Src, size_t _Size);
9
10 extern __inline__ __attribute__((__always_inline__, __gnu_inline__)) __attribute__((__artificial__))
memcpy(void * __dst,const void * __src,size_t __n)11 void *memcpy(void *__dst, const void *__src, size_t __n)
12 {
13 return __builtin___memcpy_chk(__dst, __src, __n, __builtin_object_size((__dst), ((0) > 0) && (2 > 1)));
14 }
15
16 void *memcpy(void *_Dst, const void *_Src, size_t _Size);
17
18 char *a, *b;
func(void)19 void func(void) {
20 memcpy(a, b, 42);
21 }
22
23 // CHECK-LABEL: define {{.*}} @func(
24 // CHECK: call ptr @memcpy.inline
25
26 // CHECK-LABEL: declare {{.*}} @memcpy(
27
28 // CHECK-LABEL: define {{.*}} @memcpy.inline(
29 // CHECK: call ptr @__memcpy_chk
30