clang/test/CodeGen/memcpy-nobuiltin.c

   1 // RUN: %clang_cc1 -verify -emit-llvm -o- %s -isystem %S -DWITH_DECL | FileCheck --check-prefix=CHECK-WITH-DECL %s
   2 // RUN: %clang_cc1 -verify -emit-llvm -o- %s -isystem %S -UWITH_DECL | FileCheck --check-prefix=CHECK-NO-DECL %s
   3 // RUN: %clang_cc1 -verify -emit-llvm -o- %s -isystem %S -disable-llvm-passes -DWITH_SELF_REFERENCE_DECL | FileCheck --check-prefix=CHECK-SELF-REF-DECL %s
   4 //
   5 // CHECK-WITH-DECL-NOT: @llvm.memcpy
   6 // CHECK-NO-DECL: @llvm.memcpy
   7 // CHECK-SELF-REF-DECL-LABEL: define {{.*}}ptr @memcpy.inline
   8 // CHECK-SELF-REF-DECL:       @llvm.memcpy.{{.*}}(
   9 //
  10 #include <memcpy-nobuiltin.inc>
  11 void test(void *dest, void const *from, size_t n) {
  12   memcpy(dest, from, n);
  13
  14   static char buffer[1];
  15   memcpy(buffer, from, 2); // expected-warning {{'memcpy' will always overflow; destination buffer has size 1, but size argument is 2}}
  16 }