Red Hat Bugzilla – Bug 462015
g++ ICE in convert_move when compiling eigen2 testsuite on i386
Last modified: 2009-07-14 10:11:38 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.i386 gcc-c++-4.3.0-8.x86_64 with -m32 How reproducible: Always 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.
Created attachment 316490 [details] Testcase from eigen2 which crashes g++ Looks like Bugzilla didn't actually record my attachment, so here it is.
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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 Fedora 9 is no longer maintained, which means that it will not receive any further security or bug fix updates.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 Fedora please feel free to reopen this bug against that version. Thank you for reporting this bug and we are sorry it could not be fixed.