Bug 137017
Summary: | Optimization regression with rotate instructions | ||||||
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Product: | [Fedora] Fedora | Reporter: | vvs <vvs009> | ||||
Component: | gcc | Assignee: | Jakub Jelinek <jakub> | ||||
Status: | CLOSED WONTFIX | QA Contact: | |||||
Severity: | medium | Docs Contact: | |||||
Priority: | medium | ||||||
Version: | rawhide | CC: | barryn | ||||
Target Milestone: | --- | ||||||
Target Release: | --- | ||||||
Hardware: | i386 | ||||||
OS: | Linux | ||||||
Whiteboard: | |||||||
Fixed In Version: | Doc Type: | Bug Fix | |||||
Doc Text: | Story Points: | --- | |||||
Clone Of: | Environment: | ||||||
Last Closed: | 2004-10-25 07:30:57 UTC | Type: | --- | ||||
Regression: | --- | Mount Type: | --- | ||||
Documentation: | --- | CRM: | |||||
Verified Versions: | Category: | --- | |||||
oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |||||
Cloudforms Team: | --- | Target Upstream Version: | |||||
Embargoed: | |||||||
Attachments: |
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Description
vvs
2004-10-25 07:05:56 UTC
Created attachment 105715 [details]
test case
I certainly don't get rolb with GCC 3.2.3, 3.3.4 nor 3.4.2 (but get one with 2.96-RH and current CVS HEAD). Given that it is not a recent regression, works with HEAD GCC, all I'm going to do is: http://gcc.gnu.org/ml/gcc-patches/2004-10/msg02041.html FWIW, I get rolb with gcc4-4.0.0-0.8. This isn't surprising because it works on HEAD, of course, but I'm mentioning this because it means the reporter of this bug can try running "gcc4" instead of "gcc". Sure, gcc4 can do it, but it isn't as solid as mainline gcc, especially with regard to optimization. In particular it is known to generate broken code with some projects out there. |