Reverted commit r254862

From-SVN: r259169

gcc/ChangeLog

+2018-04-06  Tamar Christina  <tamar.christina@arm.com>
+
+	* expr.c (copy_blkmode_to_reg): Revert 254862.
+	* doc/sourcebuild.texi (word_mode_no_slow_unalign): Likewise.
+
 2018-04-06  Richard Biener  <rguenther@suse.de>
 
 	PR middle-end/85244

gcc/doc/sourcebuild.texi

@@ -2297,15 +2297,8 @@ Target supports @code{wchar_t} that is compatible with @code{char32_t}.
 
 @item comdat_group
 Target uses comdat groups.
-
-@item weak_undefined
-Target supports weak undefined symbols.
-
-@item word_mode_no_slow_unalign
-Target does not have slow unaligned access when doing word size accesses.
 @end table
 
-
 @subsubsection Local to tests in @code{gcc.target/i386}
 
 @table @code

gcc/expr.c

@@ -2782,9 +2782,7 @@ copy_blkmode_to_reg (machine_mode mode_in, tree src)
 
   n_regs = (bytes + UNITS_PER_WORD - 1) / UNITS_PER_WORD;
   dst_words = XALLOCAVEC (rtx, n_regs);
-  bitsize = BITS_PER_WORD;
-  if (targetm.slow_unaligned_access (word_mode, TYPE_ALIGN (TREE_TYPE (src))))
-    bitsize = MIN (TYPE_ALIGN (TREE_TYPE (src)), BITS_PER_WORD);
+  bitsize = MIN (TYPE_ALIGN (TREE_TYPE (src)), BITS_PER_WORD);
 
   /* Copy the structure BITSIZE bits at a time.  */
   for (bitpos = 0, xbitpos = padding_correction;

gcc/testsuite/ChangeLog

+2018-04-06  Tamar Christina  <tamar.christina@arm.com>
+
+	* gcc.dg/struct-simple.c: Revert r254862.
+	* lib/target-supports.exp
+	(check_effective_target_word_mode_no_slow_unalign): Likewise.
+
 2018-04-06  Richard Biener  <rguenther@suse.de>
 
 	PR middle-end/85244

gcc/testsuite/gcc.dg/struct-simple.c

-/* { dg-do-run } */
-/* { dg-require-effective-target word_mode_no_slow_unalign } */
-/* { dg-additional-options "-fdump-rtl-final" } */
-
-/* Copyright 1996, 1999, 2007 Free Software Foundation, Inc.
-
-   This program is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by
-   the Free Software Foundation; either version 3 of the License, or
-   (at your option) any later version.
-
-   This program is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-   GNU General Public License for more details.
-
-   You should have received a copy of the GNU General Public License
-   along with GCC; see the file COPYING3.  If not see
-   <http://www.gnu.org/licenses/>.
-
-   Please email any bugs, comments, and/or additions to this file to:
-   bug-gdb@prep.ai.mit.edu  */
-
-#include <stdio.h>
-
-struct struct3 { char a, b, c; };
-struct struct3 foo3 = { 'A', 'B', 'C'},  L3;
-
-struct struct3  fun3()
-{
-  return foo3;
-}
-
-#ifdef PROTOTYPES
-void Fun3(struct struct3 foo3)
-#else
-void Fun3(foo3)
-     struct struct3 foo3;
-#endif
-{
-  L3 = foo3;
-}
-
-int main()
-{
-  struct struct3 x = fun3();
-
-  printf("a:%c, b:%c, c:%c\n", x.a, x.b, x.c);
-}
-
-/* { dg-final { scan-rtl-dump-not {zero_extract:.+\[\s*foo3\s*\]} "final" } } */
-

gcc/testsuite/lib/target-supports.exp

@@ -6364,31 +6364,6 @@ proc check_effective_target_unaligned_stack { } {
     return $et_unaligned_stack_saved
 }
 
-# Return 1 if the target plus current options does not have
-# slow unaligned access when using word size accesses.
-#
-# This won't change for different subtargets so cache the result.
-
-proc check_effective_target_word_mode_no_slow_unalign { } {
-    global et_word_mode_no_slow_unalign_saved
-    global et_index
-
-    if [info exists et_word_mode_no_slow_unalign_saved($et_index)] {
-        verbose "check_effective_target_word_mode_no_slow_unalign: \
-                 using cached result" 2
-    } else {
-        set et_word_mode_no_slow_unalign_saved($et_index) 0
-        if { [is-effective-target non_strict_align]
-	     && !([istarget arm*-*-*])
-           } {
-            set et_word_mode_no_slow_unalign_saved($et_index) 1
-        }
-    }
-    verbose "check_effective_target_word_mode_no_slow_unalign:\
-             returning $et_word_mode_no_slow_unalign_saved($et_index)" 2
-    return $et_word_mode_no_slow_unalign_saved($et_index)
-}
-
 # Return 1 if the target plus current options does not support a vector
 # alignment mechanism, 0 otherwise.
 #