[Bug middle-end/72778] New: [7 Regression] internal compiler error: in create_pre_exit, at mode-switching.c:451

["hjl.tools at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=72778

            Bug ID: 72778
           Summary: [7 Regression] internal compiler error: in
                    create_pre_exit, at mode-switching.c:451
           Product: gcc
           Version: 7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
          Assignee: unassigned at gcc dot gnu.org
          Reporter: hjl.tools at gmail dot com
  Target Milestone: ---

On x86, r238991 caused:

[hjl@gnu-6 gcc]$ ./xgcc -B./
/export/gnu/import/git/sources/gcc/gcc/testsuite/gcc.target/i386/mpx/pr66048.cc
-S -O2 -fcheck-pointer-bounds -mmpx -mavx
/export/gnu/import/git/sources/gcc/gcc/testsuite/gcc.target/i386/mpx/pr66048.cc:
In function ‘c1 test.chkp(c2, #‘pointer_bounds_type’ not supported by
dump_type#<type error>, void, ...)’:
/export/gnu/import/git/sources/gcc/gcc/testsuite/gcc.target/i386/mpx/pr66048.cc:16:1:
internal compiler error: in create_pre_exit, at mode-switching.c:451
 }
 ^
0x1b3e104 create_pre_exit
        /export/gnu/import/git/sources/gcc/gcc/mode-switching.c:437
0x1b3e377 optimize_mode_switching
        /export/gnu/import/git/sources/gcc/gcc/mode-switching.c:534
0x1b3f6a6 execute
        /export/gnu/import/git/sources/gcc/gcc/mode-switching.c:892
0xfe1176 gcc::pass_manager::execute_pass_mode_switching()
        /export/gnu/import/git/sources/gcc/gcc/passes.c:123
0x14d5a3a rest_of_handle_insert_vzeroupper
        /export/gnu/import/git/sources/gcc/gcc/config/i386/i386.c:2685
0x14d95d2 execute
        /export/gnu/import/git/sources/gcc/gcc/config/i386/i386.c:4068
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Please include the complete backtrace with any bug report.
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[hjl@gnu-6 gcc]$