On Tue, Dec 1, 2015 at 10:24 AM, Richard Sandiford
<richard.sandif...@arm.com> wrote:
> We'd call gen_shrink_wrap_conditions for functions that it can't handle
> but edom_only_function can.
>
> Tested on x86_64-linux-gnu. OK to install?
Ok.
Richard.
> Thanks,
> Richard
>
>
> gcc/
> PR tree-optimization/68474
> * tree-call-cdce.c (use_internal_fn): Protect call to
> gen_shrink_wrap_conditions.
>
> gcc/testsuite/
> PR tree-optimization/68474
> * gcc.dg/pr68474.c: New test.
>
> diff --git a/gcc/testsuite/gcc.dg/pr68474.c b/gcc/testsuite/gcc.dg/pr68474.c
> new file mode 100644
> index 0000000..8ad7def
> --- /dev/null
> +++ b/gcc/testsuite/gcc.dg/pr68474.c
> @@ -0,0 +1,7 @@
> +/* { dg-options "-O -funsafe-math-optimizations" } */
> +
> +long double
> +foo (long double d1, long double d2)
> +{
> + return d1 || __builtin_significandl (d2);
> +}
> diff --git a/gcc/tree-call-cdce.c b/gcc/tree-call-cdce.c
> index 75ef180..4123130 100644
> --- a/gcc/tree-call-cdce.c
> +++ b/gcc/tree-call-cdce.c
> @@ -959,7 +959,8 @@ use_internal_fn (gcall *call)
> {
> unsigned nconds = 0;
> auto_vec<gimple *, 12> conds;
> - gen_shrink_wrap_conditions (call, conds, &nconds);
> + if (can_test_argument_range (call))
> + gen_shrink_wrap_conditions (call, conds, &nconds);
> if (nconds == 0 && !edom_only_function (call))
> return false;
>
>
