File: reassoc-4.c

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gcc-arm-none-eabi 15%3A8-2019-q3-1
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/* { dg-do compile } */ 
/* { dg-options "-O2 -fdump-tree-optimized -ffast-math" } */
float a, b, c, d;
extern int printf (const char *, ...);
int main(void)
{
  float e;
  float f;
  /* We should not be able to transform these into the same expression, and only have two additions.  */
  e = a + b;
  e = e + c;
  f = c + a;
  f = f + b;
  printf ("%f %f\n", e, f);
}

/* { dg-final { scan-tree-dump-times "\\\+" 2 "optimized"} } */