Bug 824463 - gcc-4.7 regression bitfield store replaced with full-byte store
Summary: gcc-4.7 regression bitfield store replaced with full-byte store
Keywords:
Status: CLOSED CURRENTRELEASE
Alias: None
Product: Fedora
Classification: Fedora
Component: gcc
Version: 17
Hardware: ppc64
OS: Linux
unspecified
high
Target Milestone: ---
Assignee: Xavier Lamien
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard:
Depends On:
Blocks: 813095 855919
TreeView+ depends on / blocked
 
Reported: 2012-05-23 14:11 UTC by Brent Baude
Modified: 2012-09-10 15:35 UTC (History)
5 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed: 2012-07-12 15:46:16 UTC
Type: Bug
Embargoed:

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System ID Private Priority Status Summary Last Updated
GNU Compiler Collection 53438 0 None None None Never

Description Brent Baude 2012-05-23 14:11:32 UTC 
Description of problem:
There is a regression in 4.7 and 4.8 for bitfield stores. This was discovered in an error in xulrunner, which is blocking firefox for our F17 release (hence the critical nature of this bug).

The upstream bug is at http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53438 and I have tested the patch provided there against F17 and it fixed the problem.

There is speculation this might also fix some other packages but we have yet to identify which packages those might be.
Comment 1 Brendan Jones 2012-06-04 08:50:08 UTC 
Is it possible that this is causing bug 827748 ?
Comment 2 Brent Baude 2012-06-04 12:57:53 UTC 
gcc has been updated so it's worth trying.
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