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[Bug middle-end/79355] poor code for AVX vector compare
- From: "rguenth at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Mon, 06 Feb 2017 11:44:45 +0000
- Subject: [Bug middle-end/79355] poor code for AVX vector compare
- Auto-submitted: auto-generated
- References: <bug-79355-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79355
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-02-06
Component|target |middle-end
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
I think expand_vector_condition doesn't consider using smaller vector sizes.
<bb 2>:
_3 = VEC_COND_EXPR <a_1(D) == b_2(D), { -1, -1, -1, -1, -1, -1, -1, -1 }, {
0, 0, 0, 0, 0, 0, 0, 0 }>;
_4 = VIEW_CONVERT_EXPR<__v8su>(_3);