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[Bug target/45198] Unnecessary spill slot for highpart extraction of xmm reg
- From: "hjl.tools at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Tue, 10 Dec 2013 00:32:59 +0000
- Subject: [Bug target/45198] Unnecessary spill slot for highpart extraction of xmm reg
- Auto-submitted: auto-generated
- References: <bug-45198-4 at http dot gcc dot gnu dot org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45198
--- Comment #8 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Andrew Pinski from comment #3)
> (subreg:DI
> + (match_operand:V4SF 1 "register_operand"
> + "x,x") 0)
>
> That is not a valid subreg and should have be rejected.
This change:
http://gcc.gnu.org/ml/gcc-patches/2013-12/msg00900.html
may allow
(subreg:DI (match_operand:V4SF 1 "register_operand" "x,x") 0)