re PR target/28232 (Wrong aligned load is generated with -m4a on sh-*)

	PR target/28232
	* config/sh/sh.c (expand_block_move): Use a BLKmode rather than
	SImode memory reference for the source of a movua.
	* config/sh/sh.md (UNSPEC_MOVUA): New macro.
	(movua): Use an unspec instead of sign_extract.  Expect the source
	to have mode BLKmode.
	(extv, insv): Use a BLKmode rather than SImode memory reference
	for the source of a movua.


Co-Authored-By: Kaz Kojima <kkojima@gcc.gnu.org>

From-SVN: r117961

gcc/ChangeLog

+2006-10-22  Richard Sandiford  <richard@codesourcery.com>
+	    Kaz Kojima  <kkojima@gcc.gnu.org>
+
+	PR target/28232
+	* config/sh/sh.c (expand_block_move): Use a BLKmode rather than
+	SImode memory reference for the source of a movua.
+	* config/sh/sh.md (UNSPEC_MOVUA): New macro.
+	(movua): Use an unspec instead of sign_extract.  Expect the source
+	to have mode BLKmode.
+	(extv, insv): Use a BLKmode rather than SImode memory reference
+	for the source of a movua.
+
 2006-10-22  Jeff Law  <law@redhat.com>
 	Richard Guenther  <rguenther@suse.de>
 

gcc/config/sh/sh.c

@@ -1074,8 +1074,10 @@ expand_block_move (rtx *operands)
       while (copied + 4 <= bytes)
 	{
 	  rtx to = adjust_address (dest, SImode, copied);
-	  rtx from = adjust_automodify_address (src, SImode, src_addr, copied);
+	  rtx from = adjust_automodify_address (src, BLKmode,
+						src_addr, copied);
 
+	  set_mem_size (from, GEN_INT (4));
 	  emit_insn (gen_movua (temp, from));
 	  emit_move_insn (src_addr, plus_constant (src_addr, 4));
 	  emit_move_insn (to, temp);

gcc/config/sh/sh.md

@@ -153,6 +153,7 @@
   (UNSPEC_THUNK		36)
   (UNSPEC_SP_SET	40)
   (UNSPEC_SP_TEST	41)
+  (UNSPEC_MOVUA		42)
 
   ;; These are used with unspec_volatile.
   (UNSPECV_BLOCKAGE	0)
@@ -11147,8 +11148,8 @@ mov.l\\t1f,r0\\n\\
 
 (define_insn "movua"
   [(set (match_operand:SI 0 "register_operand" "=z")
-	(sign_extract:SI (match_operand:SI 1 "unaligned_load_operand" "Sua>")
-			 (const_int 32) (const_int 0)))]
+	(unspec:SI [(match_operand:BLK 1 "unaligned_load_operand" "Sua>")]
+		   UNSPEC_MOVUA))]
   "TARGET_SH4A_ARCH"
   "movua.l	%1,%0"
   [(set_attr "type" "movua")])
@@ -11181,8 +11182,9 @@ mov.l\\t1f,r0\\n\\
       && INTVAL (operands[3]) == -24 * (BITS_BIG_ENDIAN != BYTES_BIG_ENDIAN)
       && GET_CODE (operands[1]) == MEM && MEM_ALIGN (operands[1]) < 32)
     {
-      emit_insn (gen_movua (operands[0],
-			    adjust_address (operands[1], SImode, 0)));
+      rtx src = adjust_address (operands[1], BLKmode, 0);
+      set_mem_size (src, GEN_INT (4));
+      emit_insn (gen_movua (operands[0], src));
       DONE;
     }
 
@@ -11201,8 +11203,9 @@ mov.l\\t1f,r0\\n\\
       && INTVAL (operands[3]) == -24 * (BITS_BIG_ENDIAN != BYTES_BIG_ENDIAN)
       && GET_CODE (operands[1]) == MEM && MEM_ALIGN (operands[1]) < 32)
     {
-      emit_insn (gen_movua (operands[0],
-			    adjust_address (operands[1], SImode, 0)));
+      rtx src = adjust_address (operands[1], BLKmode, 0);
+      set_mem_size (src, GEN_INT (4));
+      emit_insn (gen_movua (operands[0], src));
       DONE;
     }