Revert the following commit to work around a bootstrap comparison failure on
ARMv7, as reported at <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71399>.

commit f6ab85b7049a03962ea98924d00802da357a1ad3
Author: renlin <renlin@138bc75d-0d04-0410-961f-82ee72b054a4>
Date:   Wed Dec 2 14:06:31 2015 +0000

    [PR67383][ARM][4.9]Backport of "Allow any register for DImode values in Thumb2"
    
    This partially fix PR67383. It allows the reload more flexibility to choose
    spilling pseudo registers.
    
    
    gcc/ChangeLog:
    
    2015-12-02  Renlin Li  <renlin.li@arm.com>
    
            Backport from mainline.
            2014-04-22  Ramana Radhakrishnan <ramana.radhakrishnan@arm.com>
    
            * config/arm/arm.c (arm_hard_regno_mode_ok): Loosen
            restrictions on core registers for DImode values in Thumb2.
    
    
    git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/gcc-4_9-branch@231177 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/config/arm/arm.c b/gcc/config/arm/arm.c
index 8ba6060..d9028a1 100644
--- b/gcc/config/arm/arm.c
+++ a/gcc/config/arm/arm.c
@@ -22624,19 +22624,12 @@
     }
 
   /* We allow almost any value to be stored in the general registers.
-     Restrict doubleword quantities to even register pairs in ARM state
-     so that we can use ldrd.  Do not allow very large Neon structure
-     opaque modes in general registers; they would use too many.  */
+     Restrict doubleword quantities to even register pairs so that we can
+     use ldrd.  Do not allow very large Neon structure opaque modes in
+     general registers; they would use too many.  */
   if (regno <= LAST_ARM_REGNUM)
-    {
-      if (ARM_NUM_REGS (mode) > 4)
-	  return FALSE;
-
-      if (TARGET_THUMB2)
-	return TRUE;
-
-      return !(TARGET_LDRD && GET_MODE_SIZE (mode) > 4 && (regno & 1) != 0);
-    }
+    return !(TARGET_LDRD && GET_MODE_SIZE (mode) > 4 && (regno & 1) != 0)
+      && ARM_NUM_REGS (mode) <= 4;
 
   if (regno == FRAME_POINTER_REGNUM
       || regno == ARG_POINTER_REGNUM)
>
</form>
</td></tr></table>
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<tr><td><span title='2018-03-03 14:23:17 +0100'>2018-03-03</span></td><td><a href='/guix/commit/gnu/packages/dictionaries.scm?id=fb547c3429c32081d68f6f78d7fdfc95a4851348'>gnu: dictionaries: Add copyright line.</a><span class='msg-avail'>...</span></td><td>Nicolas Goaziou</td></tr>
<tr><td><span title='2018-03-03 14:06:43 +0100'>2018-03-03</span></td><td><a href='/guix/commit/gnu/packages/dictionaries.scm?id=0645da3fe3112a3568e646babf524bd9439ffb8e'>gnu: grammalecte: Update to 0.6.2.</a><span class='msg-avail'>...</span></td><td>Nicolas Goaziou</td></tr>
<tr><td><span title='2018-01-29 20:46:59 +0200'>2018-01-29</span></td><td><a href='/guix/commit/gnu/packages/dictionaries.scm?id=8276a6f41131e421e37cbc90166bd80e9467f5d6'>gnu: gcide: Update to 0.52.</a><span class='msg-avail'>...</span></td><td>Efraim Flashner</td></tr>
<tr><td><span title='2018-01-10 15:59:47 +0100'>2018-01-10</span></td><td><a href='/guix/commit/gnu/packages/dictionaries.scm?id=6872680c0a43fa623818614cba332caf6d0d6e70'>gnu: ding: Update to 1.8.1.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2017-12-17 21:38:03 +0100'>2017-12-17</span></td><td><a href='/guix/commit/gnu/packages/dictionaries.scm?id=56d924a59b78be3974fadb64e1d959061ca1b898'>gnu: grammalecte: Fix 'license' field.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2017-12-17 18:58:17 +0100'>2017-12-17</span></td><td><a href='/guix/commit/gnu/packages/dictionaries.scm?id=ad564a06ad3a58027888fe7b71f0d5563a019c08'>gnu: Add grammalecte.</a><span class='msg-avail'>...</span></td><td>Nicolas Goaziou</td></tr>
<tr><td><span title='2017-06-28 09:36:02 +0300'>2017-06-28</span></td><td><a href='/guix/commit/gnu/packages/dictionaries.scm?id=ceb56fb1297390592af338dc89957182b42b0e06'>gnu: translate-shell: Update to 0.9.6.4.</a><span class='msg-avail'>...</span></td><td>Efraim Flashner</td></tr>
<tr><td><span title='2017-05-29 13:25:38 +0300'>2017-05-29</span></td><td><a href='/guix/commit/gnu/packages/dictionaries.scm?id=0f3847bfd84bb52a7f6da52cfa358aded8570310'>gnu: Add translate-shell.</a><span class='msg-avail'>...</span></td><td>Efraim Flashner</td></tr>