re PR target/16357 (ICE copying 7 bytes between extern char[]s)

	PR target/16357
	* config/mips/mips.c (mips_block_move_straight): Pass BLKmode memrefs
	to mips_expand_unaligned_load, mips_expand_unaligned_store, and
	move_by_pieces.

From-SVN: r84108

gcc/ChangeLog

+2004-07-05  Richard Sandiford  <rsandifo@redhat.com>
+
+	PR target/16357
+	* config/mips/mips.c (mips_block_move_straight): Pass BLKmode memrefs
+	to mips_expand_unaligned_load, mips_expand_unaligned_store, and
+	move_by_pieces.
+
 2004-07-05  Josef Zlomek  <zlomekj@suse.cz>
 
 	* var-tracking.c: Fix some comments.

gcc/config/mips/mips.c

@@ -3402,33 +3402,33 @@ mips_block_move_straight (rtx dest, rtx src, HOST_WIDE_INT length)
      the source has enough alignment, otherwise use left/right pairs.  */
   for (offset = 0, i = 0; offset + delta <= length; offset += delta, i++)
     {
-      rtx part;
-
       regs[i] = gen_reg_rtx (mode);
-      part = adjust_address (src, mode, offset);
-      if (MEM_ALIGN (part) >= bits)
-	emit_move_insn (regs[i], part);
-      else if (!mips_expand_unaligned_load (regs[i], part, bits, 0))
-	abort ();
+      if (MEM_ALIGN (src) >= bits)
+	emit_move_insn (regs[i], adjust_address (src, mode, offset));
+      else
+	{
+	  rtx part = adjust_address (src, BLKmode, offset);
+	  if (!mips_expand_unaligned_load (regs[i], part, bits, 0))
+	    abort ();
+	}
     }
 
   /* Copy the chunks to the destination.  */
   for (offset = 0, i = 0; offset + delta <= length; offset += delta, i++)
-    {
-      rtx part;
-
-      part = adjust_address (dest, mode, offset);
-      if (MEM_ALIGN (part) >= bits)
-	emit_move_insn (part, regs[i]);
-      else if (!mips_expand_unaligned_store (part, regs[i], bits, 0))
-	abort ();
-    }
+    if (MEM_ALIGN (dest) >= bits)
+      emit_move_insn (adjust_address (dest, mode, offset), regs[i]);
+    else
+      {
+	rtx part = adjust_address (dest, BLKmode, offset);
+	if (!mips_expand_unaligned_store (part, regs[i], bits, 0))
+	  abort ();
+      }
 
   /* Mop up any left-over bytes.  */
   if (offset < length)
     {
-      src = adjust_address (src, mode, offset);
-      dest = adjust_address (dest, mode, offset);
+      src = adjust_address (src, BLKmode, offset);
+      dest = adjust_address (dest, BLKmode, offset);
       move_by_pieces (dest, src, length - offset,
 		      MIN (MEM_ALIGN (src), MEM_ALIGN (dest)), 0);
     }

gcc/testsuite/ChangeLog

+2004-07-05  Richard Sandiford  <rsandifo@redhat.com>
+
+	* gcc.c-torture/compile/20040705-1.c: New test.
+
 2004-07-04  Bud Davis  <bdavis9659@comcast.net>
 
 	* gfortran.fortran-torture/execute/seq_io.f90: New test.

gcc/testsuite/gcc.c-torture/compile/20040705-1.c

+extern char foo[], bar[];
+void f (void) { memcpy (foo, bar, 7); }