expr.c (emit_move_via_integer): Add force argument, pass it on to emit_move_change_mode.

        * expr.c (emit_move_via_integer): Add force argument, pass it on
        to emit_move_change_mode.  Update callers.
        (emit_move_complex): Pass true to new force argument.
        * function.c (expand_function_end): Move expand_eh_return call
        earlier.  Merge sub-word complex values into a pseudo before
        copying to the return hard register.

From-SVN: r104371

1 files changed, 22 insertions, 4 deletions

diff --git a/gcc/function.c b/gcc/function.c
index 014b38c..2df1eff 100644
--- a/gcc/function.c
+++ b/gcc/function.c
@@ -4403,6 +4403,10 @@ expand_function_end (void)
   if (flag_exceptions && USING_SJLJ_EXCEPTIONS)
     sjlj_emit_function_exit_after (get_last_insn ());
 
+  /* If this is an implementation of throw, do what's necessary to
+     communicate between __builtin_eh_return and the epilogue.  */
+  expand_eh_return ();
+
   /* If scalar return value was computed in a pseudo-reg, or was a named
      return value that got dumped to the stack, copy that to the hard
      return register.  */
@@ -4464,6 +4468,24 @@ expand_function_end (void)
 				 TREE_TYPE (decl_result),
 				 int_size_in_bytes (TREE_TYPE (decl_result)));
 	    }
+	  /* In the case of complex integer modes smaller than a word, we'll
+	     need to generate some non-trivial bitfield insertions.  Do that
+	     on a pseudo and not the hard register.  */
+	  else if (GET_CODE (decl_rtl) == CONCAT
+		   && GET_MODE_CLASS (GET_MODE (decl_rtl)) == MODE_COMPLEX_INT
+		   && GET_MODE_BITSIZE (GET_MODE (decl_rtl)) <= BITS_PER_WORD)
+	    {
+	      int old_generating_concat_p;
+	      rtx tmp;
+
+	      old_generating_concat_p = generating_concat_p;
+	      generating_concat_p = 0;
+	      tmp = gen_reg_rtx (GET_MODE (decl_rtl));
+	      generating_concat_p = old_generating_concat_p;
+
+	      emit_move_insn (tmp, decl_rtl);
+	      emit_move_insn (real_decl_rtl, tmp);
+	    }
 	  else
 	    emit_move_insn (real_decl_rtl, decl_rtl);
 	}
@@ -4505,10 +4527,6 @@ expand_function_end (void)
       current_function_return_rtx = outgoing;
     }
 
-  /* If this is an implementation of throw, do what's necessary to
-     communicate between __builtin_eh_return and the epilogue.  */
-  expand_eh_return ();
-
   /* Emit the actual code to clobber return register.  */
   {
     rtx seq;