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[Bug middle-end/36099] [4.4 Regression] early loop unrolling pass prevents vectorization, SLP doesn't do its job
- From: "irar at il dot ibm dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 4 May 2008 06:02:38 -0000
- Subject: [Bug middle-end/36099] [4.4 Regression] early loop unrolling pass prevents vectorization, SLP doesn't do its job
- References: <bug-36099-12313@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #4 from irar at il dot ibm dot com 2008-05-04 06:02 -------
(In reply to comment #2)
> The vectorizer doesn't know to vectorize __builtin_cexpi or
> {REAL,IMAG}PART_EXPR
> either.
>
> IMHO rather than somehow tweaking the early unroller the vectorizer should
> know how to deal with complex types.
>
There already exists a missed-optimization PR for vectorization of
{REAL,IMAG}PART_EXPR - pr35252.
Ira
--
irar at il dot ibm dot com changed:
What |Removed |Added
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36099