gcc/testsuite/gcc.dg/Wstrict-aliasing-float-ptr-int-obj.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O -Wstrict-aliasing -fstrict-aliasing" } */
   3
   4 extern int flag;
   5
   6 int foo() {
   7
   8   int x;
   9   int y = 9;
  10   float* q;
  11   float* r;
  12
  13   if (flag) {
  14     q = (float*) &x;  /* { dg-warning "type-punn" } */
  15   } else {
  16     q = (float*) &y;  /* { dg-warning "type-punn" } */
  17   }
  18
  19   *q = 1.0;
  20
  21   return x;
  22
  23 }