[Bug c/41643] New: ICE (segmentation fault) for SPEC CPU2000's 176.gcc when using -fno-tree-dce

["kenneth dot hoste at elis dot ugent dot be" <gcc-bugzilla at gcc dot gnu dot org>]

Using -fno-tree-dce in combination with any of -O2/-O3/-Os causes GCC 4.4.1 to
segfault when compiling the 176.gcc benchmark, more specifically when compiling
the combine.c source file. The same occurs when using -O1 -fno-tree-dce
-foptimize-sibling-calls.

combine.c:7182: internal compiler error: Segmentation fault

A reduced test case for this issue is attached.


-- 
           Summary: ICE (segmentation fault) for SPEC CPU2000's 176.gcc when
                    using -fno-tree-dce
           Product: gcc
           Version: 4.4.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: kenneth dot hoste at elis dot ugent dot be
 GCC build triplet: x86_64-unknown-linux-gnu
  GCC host triplet: x86_64-unknown-linux-gnu
GCC target triplet: x86_64-unknown-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41643