llvm-gcc-4.2/gcc/testsuite/gcc.dg/20020418-2.c

/* PR optimization/6010 */
/* { dg-do compile } */
/* { dg-options "-O2 -funroll-all-loops" } */
/* { dg-options "-O2 -funroll-all-loops -march=pentium3" { target { { i?86-*-* x86_64-*-* } && ilp32 } } } */

void bar (float);

void foo (float y, unsigned long z)
{
  int b;
  float c = y;

  for (b = 0; b < z; b++)
    {
      bar (c);
      if (c == y)
	c = -y;
      else
	c = y;
    }
}