gcc/testsuite/gcc.dg/signbit-3.c

   1 /* { dg-do assemble } */
   2 /* { dg-options "-O1 --save-temps -fdump-tree-optimized" } */
   3
   4 #include <stdint.h>
   5
   6 void fun1(int32_t *x, int n)
   7 {
   8     for (int i = 0; i < (n & -16); i++)
   9       x[i] = (-x[i]) >> 31;
  10 }
  11
  12 /* { dg-final { scan-tree-dump-times {\s+>\s+0;} 1 optimized } } */
  13 /* { dg-final { scan-tree-dump-not {\s+>>\s+31} optimized } } */