gcc/testsuite/gcc.dg/uninit-39.c

   1 /* PR c/98592 - ICE in gimple_canonical_types_compatible_p while formatting
   2    a MEM_REF
   3    { dg-do compile }
   4    { dg-options "-O2 -Wall" }
   5    { dg-require-effective-target alloca } */
   6
   7 void f (int);
   8
   9 void vlaNx3_to_pia1 (int n)
  10 {
  11   int a[n][3];
  12
  13   /* The VLA isn't formatted correctly due to PR 98587.  Just verify
  14      there is no ICE and a warning is issued.  */
  15   f (((*(int(*)[4])&a[1][2]))[3]);      // { dg-warning "\\\[-Wuninitialized" }
  16 }
  17
  18 void vlaNxN_to_pia1 (int n)
  19 {
  20   int a[n][n];
  21
  22   /* Same as above.  */
  23   f (((*(int(*)[4])&a[1][2]))[3]);      // { dg-warning "\\\[-Wuninitialized" }
  24 }
  25
  26 void vlaNxN_to_pvla4xN (int n)
  27 {
  28   int a[n][n];
  29
  30   /* Same as above.  */
  31   f (((*(int(*)[4][n])&a[1][2]))[3][4]);  // { dg-warning "\\\[-Wuninitialized" }
  32 }
  33
  34 void vlaN_to_pia2 (int n)
  35 {
  36   int a[n];
  37
  38   /* Same as above.  */
  39   f (((*(int(*)[3][4])&a[1]))[2][3]);   // { dg-warning "\\\[-Wuninitialized" }
  40 }
  41
  42 void vlaN_to_pvlaNx4 (int n)
  43 {
  44   int a[n];
  45
  46   /* Same as above.  */
  47   f (((*(int(*)[n][4])&a[1]))[1][3]);   // { dg-warning "\\\[-Wuninitialized" }
  48 }