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From: "mikulas at artax dot karlin.mff.cuni.cz" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/60310] New: internal compiler error due to excessive alignment
Date: Sat, 22 Feb 2014 00:52:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60310

            Bug ID: 60310
           Summary: internal compiler error due to excessive alignment
           Product: gcc
           Version: 4.8.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
          Assignee: unassigned at gcc dot gnu.org
          Reporter: mikulas at artax dot karlin.mff.cuni.cz
              Host: arm-linux-gnueabihf
            Target: arm-linux-gnueabihf
             Build: arm-linux-gnueabihf

When compiling this piece of code with or without optimizations, gcc crashes
with
an internal error:

int f(void)
{
        struct { __attribute__((aligned(1 << 28)))double a; } x;
        return 0;
}

alignof.c: In function 'f':
alignof.c:3:9: internal compiler error: in round_up_loc, at fold-const.c:16748
  struct { __attribute__((aligned(1 << 28)))double a; } x;
         ^
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-4.8/README.Bugs> for instructions.
Preprocessed source stored into /tmp/ccQIqkJl.out file, please attach this to
your bugreport.

I reproduced the bug on gcc-4.6.4, gcc-4.7.2, gcc-4.7.3, gcc-4.8.2.