[Bug target/59163] [4.8/4.9 Regression] program compiled with g++ -O3 segfaults

["ubizjak at gmail dot com" <gcc-bugzilla@gcc.gnu.org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59163

--- Comment #6 from Uroš Bizjak <ubizjak at gmail dot com> ---
I think that we should disallow tie of TImode with 128bit vector modes due to
different alignment requirements. Integer register pairs can load unaligned
TImode without problems, while unaligned TImode will crash SSE insns.

Following patch fixes the problem:

Index: config/i386/i386.c
===================================================================
--- config/i386/i386.c  (revision 205509)
+++ config/i386/i386.c  (working copy)
@@ -35237,6 +35237,7 @@ ix86_modes_tieable_p (enum machine_mode mode1, enu
     return (GET_MODE_SIZE (mode1) == 32
            && ix86_hard_regno_mode_ok (FIRST_SSE_REG, mode1));
   if (GET_MODE_SIZE (mode2) == 16
+      && !(mode1 == TImode || mode2 == TImode)
       && ix86_hard_regno_mode_ok (FIRST_SSE_REG, mode2))
     return (GET_MODE_SIZE (mode1) == 16
            && ix86_hard_regno_mode_ok (FIRST_SSE_REG, mode1));

However, it needs some refinements for AVX.
>From gcc-bugs-return-436245-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 29 13:00:43 2013
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From: "hjl at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/59309] FAIL: c-c++-common/cilk-plus/CK/spawnee_inline.c  -g -fcilkplus (test for excess  errors)
Date: Fri, 29 Nov 2013 13:00:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?idY309

--- Comment #4 from hjl at gcc dot gnu.org <hjl at gcc dot gnu.org> ---
Author: hjl
Date: Fri Nov 29 13:00:35 2013
New Revision: 205525

URL: http://gcc.gnu.org/viewcvs?rev 5525&root=gcc&view=rev
Log:
Properly handle function without arguments

    PR c/59309
    * cilk.c (gimplify_cilk_spawn): Properly handle function without
    arguments.

Modified:
    trunk/gcc/c-family/ChangeLog
    trunk/gcc/c-family/cilk.c