view gcc/testsuite/gcc.dg/tree-ssa/slsr-25.c @ 158:494b0b89df80 default tip

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author Shinji KONO <kono@ie.u-ryukyu.ac.jp>
date Mon, 25 May 2020 18:13:55 +0900
parents 04ced10e8804
children
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/* Verify straight-line strength reduction for multiply candidates
   with variable stride and control flow, increment = -1.  */

/* { dg-do compile } */
/* { dg-options "-O3 -fdump-tree-optimized" } */

int 
f (int n, int x, int stride)
{
  int a, x1, x2, x3;

  a = x * stride;

  if (n > 64)
    {
      x1 = x - 1;
      a += x1 * stride;
      x2 = x1 - 1;
      a += x2 * stride;
    }
  else
    {
      x3 = x - 1;
      a += x3 * stride;
    }

  return a;
}

/* { dg-final { scan-tree-dump-times " \\* " 1 "optimized" } } */