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 // RUN: %clang_cc1 -triple x86_64-linux-gnu -O1 -fexperimental-new-pass-manager -S -o - %s | FileCheck -check-prefix=STRCPY -check-prefix=MEMSET %s
8 // RUN: %clang_cc1 -triple x86_64-linux-gnu -fno-builtin -O1 -fexperimental-new-pass-manager -S -o - %s | FileCheck -check-prefix=NOSTRCPY -check-prefix=NOMEMSET %s
9 // RUN: %clang_cc1 -triple x86_64-linux-gnu -fno-builtin-memset -O1 -fexperimental-new-pass-manager -S -o - %s | FileCheck -check-prefix=STRCPY -check-prefix=NOMEMSET %s
10 
11 void PR13497() {
12   char content[2];
13   // make sure we don't optimize this call to strcpy()
14   // STRCPY-NOT: __strcpy_chk
15   // NOSTRCPY: __strcpy_chk
16   __builtin___strcpy_chk(content, "", 1);
17 }
18 
19 void PR4941(char *s) {
20   // Make sure we don't optimize this loop to a memset().
21   // NOMEMSET-NOT: memset
22   // MEMSET: memset
23   for (unsigned i = 0; i < 8192; ++i)
24     s[i] = 0;
25 }
26