gcc/testsuite/c-c++-common/attr-nonstring-4.c

   1 /* PR middle-end/83131 - c-c++/common/attr-nonstring-3 failure for strcmp
   2    tests on PowerPC
   3    { dg-do compile }
   4    { dg-options "-O2 -Wstringop-overflow -ftrack-macro-expansion=0" }  */
   5
   6 #if __cplusplus
   7 extern "C" {
   8 #endif
   9
  10 typedef __SIZE_TYPE__ size_t;
  11
  12 extern int strcmp (const char*, const char*);
  13 extern int strncmp (const char*, const char*, size_t);
  14
  15 #if __cplusplus
  16 }   /* extern "C" */
  17 #endif
  18
  19 extern char arx[] __attribute__ ((nonstring));
  20 extern char ar5[5] __attribute__ ((nonstring));
  21 extern char str[];
  22
  23 enum { N = sizeof ar5 };
  24 enum { X = sizeof ar5 + 1 };
  25
  26
  27 int warn_strcmp_cst_1 (void)
  28 {
  29   return strcmp ("bar", arx);       /* { dg-warning "argument 2 declared attribute .nonstring." } */
  30 }
  31
  32 int warn_strcmp_cst_2 (void)
  33 {
  34   return strcmp (arx, "foo");       /* { dg-warning "argument 1 declared attribute .nonstring." } */
  35 }
  36
  37
  38 int warn_strncmp_cst_1 (void)
  39 {
  40   return strncmp ("bar", ar5, X);   /* { dg-warning "argument 2 declared attribute .nonstring." } */
  41 }
  42
  43 int warn_strncmp_cst_2 (void)
  44 {
  45   return strncmp (ar5, "foo", X);   /* { dg-warning "argument 1 declared attribute .nonstring." } */
  46 }
  47
  48
  49 int nowarn_strncmp_cst_1 (void)
  50 {
  51   return strncmp ("bar", ar5, N);
  52 }
  53
  54 int nowarn_strncmp_cst_2 (void)
  55 {
  56   return strncmp (ar5, "foo", N);
  57 }
  58
  59
  60 int warn_strncmp_var_1 (void)
  61 {
  62   return strncmp (str, ar5, X);     /* { dg-warning "argument 2 declared attribute .nonstring." } */
  63 }
  64
  65 int warn_strncmp_var_2 (void)
  66 {
  67   return strncmp (ar5, str, X);     /* { dg-warning "argument 1 declared attribute .nonstring." } */
  68 }
  69
  70
  71 int nowarn_strncmp_var_1 (void)
  72 {
  73   return strncmp (str, ar5, N);
  74 }
  75
  76 int nowarn_strncmp_var_2 (void)
  77 {
  78   return strncmp (ar5, str, N);
  79 }