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[Bug tree-optimization/71307] Poor code quality with lane extraction arm_neon.h intrinsics on aarch64
- From: "rsandifo at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Fri, 15 Sep 2017 08:16:09 +0000
- Subject: [Bug tree-optimization/71307] Poor code quality with lane extraction arm_neon.h intrinsics on aarch64
- Auto-submitted: auto-generated
- References: <bug-71307-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71307
rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> changed:
What |Removed |Added
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CC| |rsandifo at gcc dot gnu.org
--- Comment #6 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
Created attachment 42176
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42176&action=edit
Possible fix
The attached patch in combination with r252033 seems to fix it for me.
The patch is from the SVE series, which needs to add a union class
of POINTER+FP anyway because of the presence of predicate registers.
Would appreciate more testing as to whether this is a good thing or not
in general.