[Bug c/65395] New: compiler crash, -ftree-pre leads to SSA corruption

["jens.gustedt at inria dot fr" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65395

            Bug ID: 65395
           Summary: compiler crash, -ftree-pre leads to SSA corruption
           Product: gcc
           Version: 4.9.2
            Status: UNCONFIRMED
          Severity: blocker
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: jens.gustedt at inria dot fr

Created attachment 35015
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=35015&action=edit
code to reproduce compiler crash

The attached, very contrived code, has gcc crashing with

gcc -c -O3 orwl_proc_symbols-prepro.c

the code compiles fine with

gcc -c -O3 -fno-tree-pre orwl_proc_symbols-prepro.c

As indicated the code is very contrived and the result of reducing a
complicated macro expanded code to a minimal example. So the one I give here
seems to be minimal to reproduce the crash. It has

 - nested for loops of a depth 15 or so
 - uses setjmp (but no longjmp)
 - uses an inline function that does not much but calling a _Noreturn function
conditionally

without any of these components the bug goes away ...

BTW, I observed the bug already for earlier versions of gcc 4.9. gcc 4.8 works
fine. My system is a x86_64 with debian jessie, nothing fancy.