gcc/testsuite/gcc.dg/tree-ssa/strlen-1.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -fdump-tree-optimized" } */
   3 extern const unsigned long base;
   4 static inline void wreg(unsigned char val, unsigned long addr) __attribute__((always_inline));
   5 static inline void wreg(unsigned char val, unsigned long addr)
   6 {
   7    *((volatile unsigned char *) (__SIZE_TYPE__) (base + addr)) = val;
   8 }
   9 void wreg_twice(void)
  10 {
  11    wreg(0, 42);
  12    wreg(0, 42);
  13 }
  14
  15 /* We should not remove the second null character store to (base+42) address. */
  16 /* { dg-final { scan-tree-dump-times " ={v} 0;" 2 "optimized" } }  */