gcc/testsuite/gcc.dg/fold-mod-1.c

   1 /* { dg-do compile } */
   2 /* { dg-require-effective-target int32plus } */
   3 /* { dg-options "-fdump-tree-gimple -fstrict-overflow" } */
   4
   5 #define ABS(x) (x > 0 ? x : -x)
   6
   7 unsigned int f (unsigned int a) {
   8         /* (unsigned)-8 is not a power of 2.  */
   9         return a % -8;
  10 }
  11
  12 int g (int b) {
  13         return ABS (b) % -8;
  14 }
  15
  16 int h (int c) {
  17         return ABS (c) % 8;
  18 }
  19
  20 unsigned int k (unsigned int d) {
  21         return d % 8;
  22 }
  23
  24 /* { dg-final { scan-tree-dump "a % (4294967288|0x0fffffff8)" "gimple" } } */
  25 /* { dg-final { scan-tree-dump-times " & 7" 3 "gimple" } } */
  26 /* { dg-final { cleanup-tree-dump "gimple" } } */