http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27139
Marc Glisse <marc.glisse at normalesup dot org> changed:
What |Removed |Added
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CC| |marc.glisse at normalesup
| |dot org
--- Comment #2 from Marc Glisse <marc.glisse at normalesup dot org> 2012-04-24
06:35:43 UTC ---
(In reply to comment #0)
> int test (int a)
> {
> return (double) a;
> }
I just wrote the very same testcase today, extracted from my code...
> Produces:
>
> cvtsi2sd %edi, %xmm0
> cvttsd2si %xmm0, %eax
> ret
Still does. Did you have any idea how to handle it?
> However, following code does the same (at least for -ffast-math):
> movl %edi, %eax
> ret
I don't think -ffast-math is relevant here, on x86 the int->double conversion
is exact hence the reverse has to be as well.
(In reply to comment #1)
> Confirmed, I doubt this shows up that much anyways.
Just posting to mention that it does show up...
