30 lines · c
1// RUN: %clang_cc1 -triple i686-w64-mingw32 -emit-llvm -disable-llvm-passes -o - %s | FileCheck %s2//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 6typedef unsigned int size_t;7 8void *memcpy(void *_Dst, const void *_Src, size_t _Size);9 10extern __inline__ __attribute__((__always_inline__, __gnu_inline__)) __attribute__((__artificial__))11void *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 16void *memcpy(void *_Dst, const void *_Src, size_t _Size);17 18char *a, *b;19void func(void) {20 memcpy(a, b, 42);21}22 23// CHECK-LABEL: define {{.*}} @func(24// CHECK: call ptr @memcpy.inline25 26// CHECK-LABEL: declare {{.*}} @memcpy(27 28// CHECK-LABEL: define {{.*}} @memcpy.inline(29// CHECK: call ptr @__memcpy_chk30