GCC trunk gets an internal compiler error when building SPEC CPU2000 test 164.gzip with "-O2 -floop-interchange" on powerpc-linux, as demonstrated by a minimized testcase that I'll attach to this PR.
elm3b149% /home/janis/tools/gcc-trunk-anonsvn/bin/gcc -c -O2 -floop-interchange bug.c bug.c: In function inflate_fixed: bug.c:56:1: internal compiler error: tree check: expected ssa_name, have integer_cst in detect_commutative_reduction, at graphite-sese-to-poly.c:2654 Please submit a full bug report, with preprocessed source if appropriate. See <http://gcc.gnu.org/bugs.html> for instructions. A Graphite-enabled trunk build is broken during the 19-hour range from r150250 to 150300. The test passes with the build just before that range and fails with r150301, the first revision that builds after a merge from the Graphite branch. -- Summary: failing tree check in graphite-sese-to-poly.c for 164.gzip Product: gcc Version: 4.5.0 Status: UNCONFIRMED Keywords: ice-on-valid-code Severity: normal Priority: P3 Component: tree-optimization AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: janis at gcc dot gnu dot org GCC target triplet: powerpc-linux http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42284