[Bug middle-end/62078] New: [4.10 Regression] ICE: verify_flow_info failed: missing REG_EH_REGION note at the end of bb 2 with -fdelete-dead-exceptions

["zsojka at seznam dot cz" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62078

            Bug ID: 62078
           Summary: [4.10 Regression] ICE: verify_flow_info failed:
                    missing REG_EH_REGION note at the end of bb 2 with
                    -fdelete-dead-exceptions
           Product: gcc
           Version: 4.10.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
          Assignee: unassigned at gcc dot gnu.org
          Reporter: zsojka at seznam dot cz

Created attachment 33278
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=33278&action=edit
mostly reduced testcase

Compiler output:
$ $ /mnt/svn/gcc-trunk/binary-latest/bin/gcc -Og -fdelete-dead-exceptions
-fnon-call-exceptions testcase.C 
testcase.C: In function 'void foo()':
testcase.C:31:1: error: missing REG_EH_REGION note at the end of bb 40
 }
 ^
testcase.C:31:1: error: missing REG_EH_REGION note at the end of bb 38
testcase.C:31:1: error: missing REG_EH_REGION note at the end of bb 36
testcase.C:31:1: error: missing REG_EH_REGION note at the end of bb 34
testcase.C:31:1: error: missing REG_EH_REGION note at the end of bb 32
testcase.C:31:1: error: missing REG_EH_REGION note at the end of bb 30
testcase.C:31:1: error: missing REG_EH_REGION note at the end of bb 28
testcase.C:31:1: error: missing REG_EH_REGION note at the end of bb 26
testcase.C:31:1: error: missing REG_EH_REGION note at the end of bb 24
testcase.C:31:1: error: missing REG_EH_REGION note at the end of bb 22
testcase.C:31:1: error: missing REG_EH_REGION note at the end of bb 18
testcase.C:31:1: error: missing REG_EH_REGION note at the end of bb 16
testcase.C:31:1: error: missing REG_EH_REGION note at the end of bb 14
testcase.C:31:1: error: missing REG_EH_REGION note at the end of bb 12
testcase.C:31:1: error: missing REG_EH_REGION note at the end of bb 10
testcase.C:31:1: error: missing REG_EH_REGION note at the end of bb 8
testcase.C:31:1: error: missing REG_EH_REGION note at the end of bb 6
testcase.C:31:1: error: missing REG_EH_REGION note at the end of bb 4
testcase.C:31:1: error: missing REG_EH_REGION note at the end of bb 2
testcase.C:31:1: internal compiler error: verify_flow_info failed
0x91f1d6 verify_flow_info()
        /mnt/svn/gcc-trunk/gcc/cfghooks.c:260
0xc28ac4 execute_function_todo
        /mnt/svn/gcc-trunk/gcc/passes.c:1761
0xc294d3 execute_todo
        /mnt/svn/gcc-trunk/gcc/passes.c:1806
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.

(gdb) bt
#0  internal_error (gmsgid=gmsgid@entry=0x16e67fb "verify_flow_info failed") at
/mnt/svn/gcc-trunk/gcc/diagnostic.c:1130
#1  0x000000000091f1d7 in verify_flow_info () at
/mnt/svn/gcc-trunk/gcc/cfghooks.c:260
#2  0x0000000000c28ac5 in execute_function_todo (fn=0x7ffff6dfc498,
data=<optimized out>) at /mnt/svn/gcc-trunk/gcc/passes.c:1761
#3  0x0000000000c294d4 in execute_todo (flags=131136) at
/mnt/svn/gcc-trunk/gcc/passes.c:1806
#4  0x0000000000c2b86e in execute_one_pass (pass=pass@entry=0x1f9f350) at
/mnt/svn/gcc-trunk/gcc/passes.c:2162
#5  0x0000000000c2bdb6 in execute_pass_list_1 (pass=0x1f9f350) at
/mnt/svn/gcc-trunk/gcc/passes.c:2201
#6  0x0000000000c2bdc8 in execute_pass_list_1 (pass=0x1f9e9f0,
pass@entry=0x1f9b930) at /mnt/svn/gcc-trunk/gcc/passes.c:2202
#7  0x0000000000c2be09 in execute_pass_list (fn=0x7ffff6dfc498, pass=0x1f9b930)
at /mnt/svn/gcc-trunk/gcc/passes.c:2212
#8  0x000000000094ab40 in expand_function (node=node@entry=0x7ffff6aa7450) at
/mnt/svn/gcc-trunk/gcc/cgraphunit.c:1776
#9  0x000000000094c20c in expand_all_functions () at
/mnt/svn/gcc-trunk/gcc/cgraphunit.c:1910
#10 compile () at /mnt/svn/gcc-trunk/gcc/cgraphunit.c:2254
#11 0x000000000094dba5 in finalize_compilation_unit () at
/mnt/svn/gcc-trunk/gcc/cgraphunit.c:2331
#12 0x000000000072a166 in cp_write_global_declarations () at
/mnt/svn/gcc-trunk/gcc/cp/decl2.c:4644
#13 0x0000000000d268bd in compile_file () at
/mnt/svn/gcc-trunk/gcc/toplev.c:562
#14 0x0000000000d28c05 in do_compile () at /mnt/svn/gcc-trunk/gcc/toplev.c:1947
#15 toplev_main (argc=16, argv=0x7fffffffd7b8) at
/mnt/svn/gcc-trunk/gcc/toplev.c:2023
#16 0x00007ffff6e67db5 in __libc_start_main () from /lib64/libc.so.6
#17 0x000000000063e401 in _start ()

According to PR61031#c1, this might be just exposed by extended checking in
4.10.

Tested revisions:
r213777 - ICE
4_9 r212703 - OK