gcc/testsuite/gcc.target/powerpc/shift-int.c

   1 /* Check that shifts do not get unnecessary extends.
   2    See PR66706 for a case where this failed.  */
   3
   4 /* { dg-do compile } */
   5 /* { dg-options "-O2" } */
   6
   7 /* Each function should compile to exactly two instructions.  */
   8 /* { dg-final { scan-assembler-times {(?n)^\s+[a-z]} 16 } } */
   9 /* { dg-final { scan-assembler-times {(?n)^\s+blr} 8 } } */
  10
  11
  12 typedef unsigned u;
  13 typedef signed s;
  14
  15 u rot(u x, u n) { return (x << n) | (x >> (32 - n)); }
  16 u shl(u x, u n) { return x << n; }
  17 u shr(u x, u n) { return x >> n; }
  18 s asr(s x, u n) { return x >> n; }
  19
  20 u roti(u x) { return (x << 23) | (x >> 9); }
  21 u shli(u x) { return x << 23; }
  22 u shri(u x) { return x >> 23; }
  23 s asri(s x) { return x >> 23; }