Bug 53428 - [4.8 Regression] 403.gcc in SPEC CPU 2006 miscompiled by LTO
Summary: [4.8 Regression] 403.gcc in SPEC CPU 2006 miscompiled by LTO
Status: RESOLVED FIXED
Alias: None
Product: gcc
Classification: Unclassified
Component: middle-end (show other bugs)
Version: 4.8.0
: P3 normal
Target Milestone: 4.8.0
Assignee: Not yet assigned to anyone
URL:
Keywords: lto
Depends on:
Blocks:
 
Reported: 2012-05-20 23:30 UTC by H.J. Lu
Modified: 2012-07-04 14:00 UTC (History)
2 users (show)

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Target:
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Known to work:
Known to fail:
Last reconfirmed: 2012-05-21 00:00:00

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Description H.J. Lu 2012-05-20 23:30:28 UTC 
On Linux/x86-64, revision 187678 miscompiled
403.gcc in SPEC CPU 2006 with

-DSPEC_CPU -DNDEBUG -I.  -O2 -ffast-math -fwhole-program -flto=jobserver -fuse-linker-plugin     

I got

166.i:10048: Internal compiler error in simplify_gen_subreg, at simplify-rtx.c:2755

Revision 187620 is OK.
Comment 1 H.J. Lu 2012-05-21 01:08:52 UTC 
It is caused by revision 187631:

http://gcc.gnu.org/ml/gcc-cvs/2012-05/msg00628.html
Comment 2 Richard Biener 2012-07-04 14:00:10 UTC 
Hopefully fixed now (r189260) - please re-open if not.