203975 – (PR34130) gcc 3.x/4.x pr34130: builtin abs() gives wrong result when used in some expression

Bug 203975 (PR34130) - gcc 3.x/4.x pr34130: builtin abs() gives wrong result when used in some expression

Summary: gcc 3.x/4.x pr34130: builtin abs() gives wrong result when used in some expre...

Status:	RESOLVED FIXED

Alias:	PR34130

Product:	Gentoo Linux
Classification:	Unclassified
Component:	[OLD] Development (show other bugs)
Hardware:	All Linux

Importance:	High minor (vote)
Assignee:	Gentoo Toolchain Maintainers

URL:	http://gcc.gnu.org/PR34130
Whiteboard:
Keywords:

Depends on:
Blocks:

Reported:	2008-01-01 17:55 UTC by Vladimir Smirnov (RETIRED)
Modified:	2008-12-07 20:18 UTC (History)
CC List:	1 user (show)

See Also:
Package list:
Runtime testing required:	---

Attachments
pr34130.patch (pr34130.patch,620 bytes, patch) 2008-01-01 17:57 UTC, Vladimir Smirnov (RETIRED)	Details \| Diff
View All Add an attachment (proposed patch, testcase, etc.)

Note You need to log in before you can comment on or make changes to this bug.

Description Vladimir Smirnov (RETIRED) gentoo-dev

2008-01-01 17:55:39 UTC

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34130
cause some bugs in some software.
Suggested fix:
http://gcc.gnu.org/viewcvs/branches/gcc-4_2-branch/gcc/fold-const.c?r1=130352&r2=130351&pathrev=130352

Comment 1 Vladimir Smirnov (RETIRED) gentoo-dev

2008-01-01 17:57:08 UTC

Created attachment 139798 [details, diff]
pr34130.patch

Comment 2 Luca Lesinigo 2008-11-15 14:31:10 UTC

From gcc's bugzilla: 4.1.3 and 4.2.2 are known to fail.

I tested with 4.1.2 on HPPA and it (unsurprisingly) fails. This is the current stable gcc on all gentoo archs.

I tested with 4.2.4 and 4.3.2 on HPPA and they give correct results.

Comment 3 SpanKY gentoo-dev

2008-12-07 20:18:30 UTC

this is fixed in gcc-4.3.2