1  /* Verify that storing a bigger vector into smaller space is diagnosed.
       2     { dg-do compile }
       3     { dg-options "-O2 -Warray-bounds -Wno-stringop-overflow" } */
       4  
       5  typedef __INT16_TYPE__                         int16_t;
       6  typedef __attribute__ ((__vector_size__ (32))) char C32;
       7  
       8  typedef __attribute__ ((__vector_size__ (64))) int16_t I16_64;
       9  
      10  void sink (void*);
      11  
      12  
      13  void nowarn_c32 (char c)
      14  {
      15    extern char nowarn_a32[32];
      16  
      17    void *p = nowarn_a32;
      18    *(C32*)p = (C32){ c };
      19    sink (p);
      20  
      21    char a32[32];
      22    p = a32;
      23    *(C32*)p = (C32){ c };
      24    sink (p);
      25  }
      26  
      27  /* The invalid stores below are diagnosed by -Warray-bounds only
      28     because it doesn't use compute_objsize().  If/when that changes
      29     the function might need adjusting to avoid the hack put in place
      30     to avoid false positives due to vectorization.  */
      31  
      32  void warn_c32 (char c)
      33  {
      34    extern char warn_a32[32];   // { dg-message "'warn_a32'" "note" }
      35  
      36    void *p = warn_a32 + 1;
      37    *(C32*)p = (C32){ c };      // { dg-warning "\\\[-Warray-bounds" }
      38  
      39    /* Verify a local variable too. */
      40    char a32[32];               // { dg-message "'a32'" }
      41    p = a32 + 1;
      42    *(C32*)p = (C32){ c };      // { dg-warning "\\\[-Warray-bounds" }
      43    sink (p);
      44  }
      45  
      46  
      47  void nowarn_i16_64 (int16_t i)
      48  {
      49    extern char nowarn_a64[64];
      50  
      51    void *p = nowarn_a64;
      52    I16_64 *q = (I16_64*)p;
      53    *q = (I16_64){ i };
      54  
      55    char a64[64];
      56    q = (I16_64*)a64;
      57    *q = (I16_64){ i };
      58    sink (q);
      59  }
      60  
      61  void warn_i16_64 (int16_t i)
      62  {
      63    extern char warn_a64[64];   // { dg-message "'warn_a64'" }
      64  
      65    void *p = warn_a64 + 1;
      66    I16_64 *q = (I16_64*)p;
      67    *q = (I16_64){ i };         // { dg-warning "\\\[-Warray-bounds" }
      68  
      69    char a64[64];               // { dg-message "'a64'" }
      70    p = a64 + 1;
      71    q = (I16_64*)p;
      72    *q = (I16_64){ i };         // { dg-warning "\\\[-Warray-bounds" }
      73    sink (p);
      74  }