[Bug rtl-optimization/66237] New: [6.0 regression] FAIL: gcc.dg/tree-prof/pr34999.c compilation, -fprofile-use -D_PROFILE_USE (internal compiler error)

[schwab@linux-m68k.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66237

            Bug ID: 66237
           Summary: [6.0 regression] FAIL: gcc.dg/tree-prof/pr34999.c
                    compilation,  -fprofile-use -D_PROFILE_USE (internal
                    compiler error)
           Product: gcc
           Version: 6.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: rtl-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: schwab@linux-m68k.org
                CC: miyuki at gcc dot gnu.org
  Target Milestone: ---
            Target: aarch64-*-*

$ gcc/xgcc -Bgcc/ ../gcc/testsuite/gcc.dg/tree-prof/pr34999.c -O2
-freorder-blocks-and-partition -fprofile-generate -D_PROFILE_GENERATE -lm -o
pr34999.x01
$ ./pr34999.x01
$ gcc/xgcc -Bgcc/ ../gcc/testsuite/gcc.dg/tree-prof/pr34999.c -O2
-freorder-blocks-and-partition -fprofile-use -D_PROFILE_USE -lm -o pr34999.x02
../gcc/testsuite/gcc.dg/tree-prof/pr34999.c: In function ‘main’:
../gcc/testsuite/gcc.dg/tree-prof/pr34999.c:44:1: internal compiler error: in
as_a, at is-a.h:192
 }
 ^
0xe72e5f rtx_jump_insn* as_a<rtx_jump_insn*, rtx_insn>(rtx_insn*)
        ../../gcc/is-a.h:192
0xe72e5f fix_crossing_conditional_branches
        ../../gcc/bb-reorder.c:2047
0xe72e5f execute
        ../../gcc/bb-reorder.c:2742

f9a00e9e5f0f056b558f8615e3c030d37923ee72 is the first bad commit
commit f9a00e9e5f0f056b558f8615e3c030d37923ee72
Author: miyuki <miyuki@138bc75d-0d04-0410-961f-82ee72b054a4>
Date:   Wed May 20 19:39:42 2015 +0000

    Promote types of RTL expressions to more derived ones.