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[Bug tree-optimization/66675] Could improve vector lane folding style operations.
- From: "pinskia at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Thu, 25 Jun 2015 22:50:37 +0000
- Subject: [Bug tree-optimization/66675] Could improve vector lane folding style operations.
- Auto-submitted: auto-generated
- References: <bug-66675-4 at http dot gcc dot gnu dot org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66675
--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Note for this optimization to be useful there needs to be a heurstic to find
out if folding CONSTRUCTOR + VECTOR_CST is going to be only one or no other
add. Or using one element of the whole vector.
AKA it might not be profit able to fold CONSTRUCTOR + VECTOR_CST to CONSTRUCTOR
with all scalar additions.