[Bug debug/68302] New: [5/6 Regression] ICE with debugging enabled on mips

["aurelien at aurel32 dot net" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68302

            Bug ID: 68302
           Summary: [5/6 Regression] ICE with debugging enabled on mips
           Product: gcc
           Version: 5.2.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: debug
          Assignee: unassigned at gcc dot gnu.org
          Reporter: aurelien at aurel32 dot net
  Target Milestone: ---
              Host: mipsel-linux-gnu
            Target: mipsel-linux-gnu
             Build: mipsel-linux-gnu

Created attachment 36691
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=36691&action=edit
Reduced testcase

The attached testcase, when compiled on mips with debugging enabled and with -g
-O2 -march=mips32r2 causes an internal compiler error: Segmentation fault
(program cc1). Removing one of this three options causes the issue to
disappear.

The problem appears on both  gcc-5-branch and trunk from today. It can be
reproduced with a native compiler or a cross-compiler targeting mips or mipsel.