Bug 462015 - g++ ICE in convert_move when compiling eigen2 testsuite on i386
g++ ICE in convert_move when compiling eigen2 testsuite on i386
Product: Fedora
Classification: Fedora
Component: gcc (Show other bugs)
All Linux
medium Severity medium
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Assigned To: Jakub Jelinek
Fedora Extras Quality Assurance
Depends On:
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Reported: 2008-09-11 18:07 EDT by Kevin Kofler
Modified: 2009-07-14 10:11 EDT (History)
1 user (show)

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Doc Type: Bug Fix
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Last Closed: 2009-07-14 10:11:38 EDT
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Attachments (Terms of Use)
Testcase from eigen2 which crashes g++ (103.84 KB, application/x-bzip2)
2008-09-11 18:09 EDT, Kevin Kofler
no flags Details

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Description Kevin Kofler 2008-09-11 18:07:13 EDT
Description of problem:
As discovered during the review of eigen2 (bug 459705), its testsuite crashes Fedora 9's g++ on 32-bit x86. A build in a 64-bit mock on the same 64-bit OS succeeds.

Version-Release number of selected component (if applicable):
gcc-c++-4.3.0-8.x86_64 with -m32

How reproducible:

Steps to Reproduce:
I originally used mock -r fedora-9-i386 eigen2-2.0-0.2.alpha7.fc10.src.rpm, but here's a better way to reproduce it:
1. download attached eigen-testcase.i.bz2 (this is just the preprocessed version of inverse.cpp from eigen2 with the line numbers removed, the source code according to the GPL can be found in bug 459705 and soon in Fedora's eigen2 package)
2. bunzip2 eigen-testcase.i.bz2
3. g++ -m32 -O2 -S -fpreprocessed eigen2-testcase.i
Unfortunately, the testcase isn't really minimal because I got lost in the labyrinth of templates, so there are probably a lot more definitions than needed. I did minimize the last section (starting from void f(); in the testcase). IIRC there are some automated testcase minimizers floating around on the GCC list, it's probably worth trying to run one of these.

Actual results:
eigen2-testcase.i: In constructor ‘Eigen::LU<MatrixType>::LU(const MatrixType&) [with MatrixType = Eigen::Matrix<std::complex<double>, 10000, 10000, 10000, 10000, 49u>]’:
eigen2-testcase.i:29531: internal compiler error: in convert_move, at expr.c:371

Expected results:
The file compiles.

Additional info:
I do have some experience debugging GCC bugs (from my TIGCC work), in particular I understand GCC tree and RTL dumps, so I'll try to help as much as possible and needed, but for now I wanted to get this reported. If I find out anything further, I'll keep you updated.
Comment 1 Kevin Kofler 2008-09-11 18:09:08 EDT
Created attachment 316490 [details]
Testcase from eigen2 which crashes g++

Looks like Bugzilla didn't actually record my attachment, so here it is.
Comment 2 Bug Zapper 2009-06-09 22:41:39 EDT
This message is a reminder that Fedora 9 is nearing its end of life.
Approximately 30 (thirty) days from now Fedora will stop maintaining
and issuing updates for Fedora 9.  It is Fedora's policy to close all
bug reports from releases that are no longer maintained.  At that time
this bug will be closed as WONTFIX if it remains open with a Fedora 
'version' of '9'.

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Comment 3 Bug Zapper 2009-07-14 10:11:38 EDT
Fedora 9 changed to end-of-life (EOL) status on 2009-07-10. Fedora 9 is 
no longer maintained, which means that it will not receive any further 
security or bug fix updates. As a result we are closing this bug.

If you can reproduce this bug against a currently maintained version of 
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