calls.c (store_one_arg): Pass correct alignment to emit_push_insn for non-BLKmode values.

	* calls.c (store_one_arg): Pass correct alignment to
	emit_push_insn for non-BLKmode values.
	* expr.c (emit_push_insn): If STRICT_ALIGNMENT, copy to an
	unaligned stack slot via a suitably aligned slot.

From-SVN: r121736

1 files changed, 16 insertions, 1 deletions

diff --git a/gcc/expr.c b/gcc/expr.c
index b49813ab2a9..a04e931acd0 100644
--- a/gcc/expr.c
+++ b/gcc/expr.c
@@ -3643,7 +3643,8 @@ emit_push_insn (rtx x, enum machine_mode mode, tree type, rtx size,
 
   xinner = x;
 
-  if (mode == BLKmode)
+  if (mode == BLKmode
+      || (STRICT_ALIGNMENT && align < GET_MODE_ALIGNMENT (mode)))
     {
       /* Copy a block into the stack, entirely or partially.  */
 
@@ -3655,6 +3656,20 @@ emit_push_insn (rtx x, enum machine_mode mode, tree type, rtx size,
       offset = partial % (PARM_BOUNDARY / BITS_PER_UNIT);
       used = partial - offset;
 
+      if (mode != BLKmode)
+	{
+	  /* A value is to be stored in an insufficiently aligned
+	     stack slot; copy via a suitably aligned slot if
+	     necessary.  */
+	  size = GEN_INT (GET_MODE_SIZE (mode));
+	  if (!MEM_P (xinner))
+	    {
+	      temp = assign_temp (type, 0, 1, 1);
+	      emit_move_insn (temp, xinner);
+	      xinner = temp;
+	    }
+	}
+
       gcc_assert (size);
 
       /* USED is now the # of bytes we need not copy to the stack