The original, unreduced, testcase from pr42521 started crashing again, with the same error message. Only little modification to the reduced testcase is needed to reproduce it.
Command line: gcc -O3 -fgraphite-identity -c testcase.c Tested revisions (x86_64): r155945 - crash (x86) r155938 - crash r155902 - crash - r155881 - pr42732 fix (can be related) r155844 - OK (x86) r155833 - OK - r155728 - pr42521 fix r155363 - crash Output: $ /mnt/svn/gcc-trunk/binary-155945-x86-lto/bin/gcc -O3 -fgraphite-identity -c testcase.c testcase.c: In function 'foo': testcase.c:5:6: internal compiler error: in graphite_loop_normal_form, at graphite-sese-to-poly.c:2844 Please submit a full bug report, with preprocessed source if appropriate. See <http://gcc.gnu.org/bugs.html> for instructions. Valgrind: no errors reported -- Summary: [4.5 Regression] ICE: in graphite_loop_normal_form, at graphite-sese-to-poly.c (2) Product: gcc Version: 4.5.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: tree-optimization AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: zsojka at seznam dot cz GCC host triplet: x86(_64)-pc-linux-gnu GCC target triplet: x86(_64)-pc-linux-gnu http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42771