* calls.c (store_one_arg): Revert 1999-02-16 change. Revert

	2000-12-17 change.  Pass EXPAND_STACK_PARM to expand_expr.
	* expr.h (enum expand_modifier): Define EXPAND_STACK_PARM.
	(enum block_op_methods): Reorder for better store_expr optimization.
	* expr.c (store_expr): Test bit 1 of "want_value" for call param
	stores, test bit 0 for original want_value meaning.  Pass
	BLOCK_OP_CALL_PARM to emit_block_move when bit 1 set.  Adjust
	recursive calls, and calls to expand_param.
	(expand_expr): Handle EXPAND_STACK_PARM modifier.  When cse
	expected, set target to 0 rather than to subtarget.  Formatting.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@63337 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 8 insertions, 5 deletions

diff --git a/gcc/expr.h b/gcc/expr.h
index 12103722730..2f243266cf2 100644
--- a/gcc/expr.h
+++ b/gcc/expr.h
@@ -1,6 +1,6 @@
 /* Definitions for code generation pass of GNU compiler.
    Copyright (C) 1987, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
-   1999, 2000 Free Software Foundation, Inc.
+   1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
 
 This file is part of GCC.
 
@@ -44,13 +44,16 @@ Software Foundation, 59 Temple Place - Suite 330, Boston, MA
 #define QUEUED_NEXT(P) XEXP (P, 4)
 
 /* This is the 4th arg to `expand_expr'.
+   EXPAND_STACK_PARM means we are possibly expanding a call param onto
+   the stack.  Choosing a value of 2 isn't special;  It just allows
+   some code optimization in store_expr.
    EXPAND_SUM means it is ok to return a PLUS rtx or MULT rtx.
    EXPAND_INITIALIZER is similar but also record any labels on forced_labels.
    EXPAND_CONST_ADDRESS means it is ok to return a MEM whose address
     is a constant that is not a legitimate address.
    EXPAND_WRITE means we are only going to write to the resulting rtx.  */
-enum expand_modifier {EXPAND_NORMAL, EXPAND_SUM, EXPAND_CONST_ADDRESS,
-			EXPAND_INITIALIZER, EXPAND_WRITE};
+enum expand_modifier {EXPAND_NORMAL = 0, EXPAND_STACK_PARM = 2, EXPAND_SUM,
+		      EXPAND_CONST_ADDRESS, EXPAND_INITIALIZER, EXPAND_WRITE};
 
 /* Prevent the compiler from deferring stack pops.  See
    inhibit_defer_pop for more information.  */
@@ -378,8 +381,8 @@ extern rtx convert_modes PARAMS ((enum machine_mode, enum machine_mode,
 enum block_op_methods
 {
   BLOCK_OP_NORMAL,
-  BLOCK_OP_CALL_PARM,
-  BLOCK_OP_NO_LIBCALL
+  BLOCK_OP_NO_LIBCALL,
+  BLOCK_OP_CALL_PARM
 };
 
 extern rtx emit_block_move PARAMS ((rtx, rtx, rtx, enum block_op_methods));