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[Bug tree-optimization/60042] New: vectorizer still does too many dependence tests for himeno:jacobi
- 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, 03 Feb 2014 11:19:19 +0000
- Subject: [Bug tree-optimization/60042] New: vectorizer still does too many dependence tests for himeno:jacobi
- Auto-submitted: auto-generated
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60042
Bug ID: 60042
Summary: vectorizer still does too many dependence tests for
himeno:jacobi
Product: gcc
Version: 4.9.0
Status: UNCONFIRMED
Keywords: missed-optimization
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: rguenth at gcc dot gnu.org
Created attachment 32026
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=32026&action=edit
himeno bench
I still get
himenobmtxpa.c:296:9: note: disable versioning for alias - max number of
generated checks exceeded
himenobmtxpa.c:296:9: note: too long list of versioning for alias run-time
tests.
I have a patch to remove some false dependences but still
himenobmtxpa.c:296:9: note: improved number of alias checks from 31 to 21
and 21 is too much - 7 should suffice.