Bug 66952 - gcc generates incorrect code when using mcpu and march i686
Summary: gcc generates incorrect code when using mcpu and march i686
Keywords:
Status: CLOSED CURRENTRELEASE
Alias: None
Product: Red Hat Linux
Classification: Retired
Component: gcc
Version: 7.3
Hardware: i686
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Jakub Jelinek
QA Contact: Brian Brock
URL:
Whiteboard:
: 814674 (view as bug list)
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2002-06-19 01:49 UTC by Suchandra Thapa
Modified: 2012-06-20 07:07 UTC (History)
1 user (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2004-10-02 21:26:12 UTC
Embargoed:

Attachments (Terms of Use)

Description Suchandra Thapa 2002-06-19 01:49:28 UTC 
From Bugzilla Helper:
User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.0.0) Gecko/20020605

Description of problem:
gcc can't build binary rpms of R 1.5.1 if 686 specific instructions and
scheduling are specified.

Version-Release number of selected component (if applicable): 2.96-98

How reproducible:
Always

Steps to Reproduce:
1. Obtain R-base 1.51 source rpm from
http://cran.r-project.org/bin/linux/redhat/SRPMS/
2. Try building with RPM_OPT_FLAGS  -O2 -mcpu=i686 -march=i686

Actual Results:  Build fails with an segfault in generated binary, build works
RPM_OPT_FLAGS are  -O2 -mcpu=i586 -march=i586.  


Expected Results:  Build should have succeeded.

Additional info:

This was observed on a dual p3 500 system with gcc-2.96-98.
Comment 1 Suchandra Thapa 2002-07-09 22:28:09 UTC 
This is also present with the gcc-2.96-100 package which comes with redhat 7.3
Comment 2 Richard Henderson 2004-10-02 21:26:12 UTC 
Works with gcc 3.2 and R 1.9.1.
Comment 3 Stanislaw Gruszka 2012-06-20 07:07:03 UTC 
*** Bug 814674 has been marked as a duplicate of this bug. ***
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