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[Bug target/36135] GCC creates suboptimal ASM : suboptimal Adressing-Modes used
- From: "gunnar at greyhound-data dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 13 Jun 2008 13:34:32 -0000
- Subject: [Bug target/36135] GCC creates suboptimal ASM : suboptimal Adressing-Modes used
- References: <bug-36135-16150@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #6 from gunnar at greyhound-data dot com 2008-06-13 13:34 -------
(In reply to comment #4)
> This comes down to IV-OPTs not understanding {post,pre}_{dec,inc} at all.
> There is another bug about this somewhere I think for arm. PowerPC has the
> same issue too ...
>
Hi Andrew,
I want to make clear that the 68K backend used to be able to do this
optimization in the GCC 2.9 times. Later with 3.4 or 4.x this optmization did
not work anymore and the code became worth.
Does this make sense in your opinion?
Cheers
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36135