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/* { dg-do run { xfail *-*-* } } */
/* We don't (and don't want to) perform this optimisation on soft-float
targets, where each addition is a library call. This test requires
-fassociative-math for enabling the variable-expansion as well as
-fsigned-zeros for honoring the sign of zero; but
they can not co-exist; also under -funsafe-math-optimizations, so we
expect it to fail. */
/* { dg-require-effective-target hard_float } */
/* { dg-options "-O2 -funroll-loops -funsafe-math-optimizations -fvariable-expansion-in-unroller -fdump-rtl-loop2_unroll" } */
extern void abort (void);
extern void exit (int);
float __attribute__((noinline))
foo (float d, int n)
{
unsigned i;
float accum = d;
for (i = 0; i < n; i++)
accum += d;
return accum;
}
int
main ()
{
if (__builtin_copysignf (1.0, foo (0.0 / -5.0, 10)) != -1.0)
abort ();
exit (0);
}
/* { dg-final { scan-rtl-dump "Expanding Accumulator" "loop2_unroll" } } */
/* { dg-final { cleanup-rtl-dump "loop*" } } */
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