[Bug tree-optimization/63569] [5.0 Regression] Wrong code with volatile and ICF

["pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63569

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Created attachment 33743
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=33743&action=edit
A Testcase which ICEs instead of just wrong code

Compile with -O2.
The ICE you get:
t3.c: In function ‘register_netdevice’:
t3.c:66:1: internal compiler error: in verify_ssa, at tree-ssa.c:936
 }
 ^
0xbebecf verify_ssa(bool, bool)
    /home/pinskia/src/toolchain/scripts/../src/gcc/tree-ssa.c:936
0x95292d execute_function_todo
    /home/pinskia/src/toolchain/scripts/../src/gcc/passes.c:1762
0x95310d do_per_function
    /home/pinskia/src/toolchain/scripts/../src/gcc/passes.c:1489
0x95310d do_per_function
    /home/pinskia/src/toolchain/scripts/../src/gcc/passes.c:1479
0x95321b execute_todo
    /home/pinskia/src/toolchain/scripts/../src/gcc/passes.c:1812
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.
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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/63569] [5.0 Regression] Wrong code with volatile and ICF
Date: Fri, 17 Oct 2014 06:54:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?idc569

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |5.0

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #1)
> Created attachment 33743 [details]
> A Testcase which ICEs instead of just wrong code

This testcase is reduced from the linux kernel on aarch64.