File: pr55831.c

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gcc-riscv64-unknown-elf 8.3.0.2019.08%2Bdfsg-1
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/* PR tree-optimization/55831 */
/* { dg-do compile } */
/* { dg-options "-O -fstrict-overflow -ftree-vectorize -Wno-unused-label" } */

int g;
short p, q;

void
foo (void)
{
  short a = p, b = q, i;

  if (a)
    {
    label:
      for (i = 0; i < 8; i++)
	b ^= a++;

      if (!b)
	g = 0;
    }
}

void
bar (void)
{
  short a = p, b = q, i;

  if (a)
    {
    label:
      for (i = 0; i < 8; i++)
	b ^= (a = a + 1);

      if (!b)
	g = 0;
    }
}