clang/test/CodeGen/nobuiltin.c

   1 // REQUIRES: x86-registered-target
   2
   3 // RUN: %clang_cc1 -triple x86_64-linux-gnu -O1 -S -o - %s | FileCheck -check-prefix=STRCPY -check-prefix=MEMSET %s
   4 // RUN: %clang_cc1 -triple x86_64-linux-gnu -fno-builtin -O1 -S -o - %s | FileCheck -check-prefix=NOSTRCPY -check-prefix=NOMEMSET %s
   5 // RUN: %clang_cc1 -triple x86_64-linux-gnu -fno-builtin-memset -O1 -S -o - %s | FileCheck -check-prefix=STRCPY -check-prefix=NOMEMSET %s
   6
   7 void PR13497(void) {
   8   char content[2];
   9   // make sure we don't optimize this call to strcpy()
  10   // STRCPY-NOT: __strcpy_chk
  11   // NOSTRCPY: __strcpy_chk
  12   __builtin___strcpy_chk(content, "", 1);
  13 }
  14
  15 void PR4941(char *s) {
  16   // Make sure we don't optimize this loop to a memset().
  17   // NOMEMSET-NOT: memset
  18   // MEMSET: memset
  19   for (unsigned i = 0; i < 8192; ++i)
  20     s[i] = 0;
  21 }