re PR debug/50299 (entryval: bigendian 32bit->64bit extension breaks address match)

	PR debug/50299
	* calls.c (load_register_parameters): Use use_reg_mode instead
	of use_reg when adding a single register CALL_INSN_FUNCTION_USAGE
	entry.
	(expand_call): Set EXPR_LIST mode to TYPE_MODE of the argument
	for stack CALL_INSN_FUNCTION_USAGE uses.
	* expr.h (use_reg_mode): New prototype.
	(use_reg): Changed into inline around use_reg_mode.
	* expr.c (use_reg): Renamed to...
	(use_reg_mode): ... this.  Added MODE argument, set EXPR_LIST
	mode to that mode instead of VOIDmode.
	* var-tracking.c (prepare_call_arguments): Don't track parameters
	whose EXPR_LIST mode is VOIDmode, BLKmode or X mode isn't convertible
	to it using lowpart_subreg.  Convert VALUE and REG/MEM to the
	EXPR_LIST mode.

From-SVN: r178784

gcc/ChangeLog

+2011-09-12  Jakub Jelinek  <jakub@redhat.com>
+
+	PR debug/50299
+	* calls.c (load_register_parameters): Use use_reg_mode instead
+	of use_reg when adding a single register CALL_INSN_FUNCTION_USAGE
+	entry.
+	(expand_call): Set EXPR_LIST mode to TYPE_MODE of the argument
+	for stack CALL_INSN_FUNCTION_USAGE uses.
+	* expr.h (use_reg_mode): New prototype.
+	(use_reg): Changed into inline around use_reg_mode.
+	* expr.c (use_reg): Renamed to...
+	(use_reg_mode): ... this.  Added MODE argument, set EXPR_LIST
+	mode to that mode instead of VOIDmode.
+	* var-tracking.c (prepare_call_arguments): Don't track parameters
+	whose EXPR_LIST mode is VOIDmode, BLKmode or X mode isn't convertible
+	to it using lowpart_subreg.  Convert VALUE and REG/MEM to the
+	EXPR_LIST mode.
+
 2011-09-12  Georg-Johann Lay  <avr@gjlay.de>
 
 	PR target/43746

gcc/calls.c

@@ -1756,7 +1756,8 @@ load_register_parameters (struct arg_data *args, int num_actuals,
 	  if (GET_CODE (reg) == PARALLEL)
 	    use_group_regs (call_fusage, reg);
 	  else if (nregs == -1)
-	    use_reg (call_fusage, reg);
+	    use_reg_mode (call_fusage, reg,
+			  TYPE_MODE (TREE_TYPE (args[i].tree_value)));
 	  else if (nregs > 0)
 	    use_regs (call_fusage, REGNO (reg), nregs);
 	}
@@ -2815,10 +2816,10 @@ expand_call (tree exp, rtx target, int ignore)
 	      }
 
 	  if (args[i].stack)
-	    call_fusage = gen_rtx_EXPR_LIST (VOIDmode,
-					     gen_rtx_USE (VOIDmode,
-							  args[i].stack),
-					     call_fusage);
+	    call_fusage
+	      = gen_rtx_EXPR_LIST (TYPE_MODE (TREE_TYPE (args[i].tree_value)),
+				   gen_rtx_USE (VOIDmode, args[i].stack),
+				   call_fusage);
 	}
 
       /* If we have a parm that is passed in registers but not in memory

gcc/expr.c

@@ -2184,13 +2184,12 @@ copy_blkmode_from_reg (rtx tgtblk, rtx srcreg, tree type)
    to by CALL_FUSAGE.  REG must denote a hard register.  */
 
 void
-use_reg (rtx *call_fusage, rtx reg)
+use_reg_mode (rtx *call_fusage, rtx reg, enum machine_mode mode)
 {
   gcc_assert (REG_P (reg) && REGNO (reg) < FIRST_PSEUDO_REGISTER);
 
   *call_fusage
-    = gen_rtx_EXPR_LIST (VOIDmode,
-			 gen_rtx_USE (VOIDmode, reg), *call_fusage);
+    = gen_rtx_EXPR_LIST (mode, gen_rtx_USE (VOIDmode, reg), *call_fusage);
 }
 
 /* Add USE expressions to *CALL_FUSAGE for each of NREGS consecutive regs,

gcc/expr.h

@@ -321,8 +321,16 @@ extern void emit_group_store (rtx, rtx, tree, int);
 /* Copy BLKmode object from a set of registers.  */
 extern rtx copy_blkmode_from_reg (rtx, rtx, tree);
 
+/* Mark REG as holding a parameter for the next CALL_INSN.
+   Mode is TYPE_MODE of the non-promoted parameter, or VOIDmode.  */
+extern void use_reg_mode (rtx *, rtx, enum machine_mode);
+
 /* Mark REG as holding a parameter for the next CALL_INSN.  */
-extern void use_reg (rtx *, rtx);
+static inline void
+use_reg (rtx *fusage, rtx reg)
+{
+  use_reg_mode (fusage, reg, VOIDmode);
+}
 
 /* Mark NREGS consecutive regs, starting at REGNO, as holding parameters
    for the next CALL_INSN.  */

gcc/var-tracking.c

@@ -5730,11 +5730,18 @@ prepare_call_arguments (basic_block bb, rtx insn)
       {
 	rtx item = NULL_RTX;
 	x = XEXP (XEXP (link, 0), 0);
-	if (REG_P (x))
+	if (GET_MODE (link) == VOIDmode
+	    || GET_MODE (link) == BLKmode
+	    || (GET_MODE (link) != GET_MODE (x)
+		&& (GET_MODE_CLASS (GET_MODE (link)) != MODE_INT
+		    || GET_MODE_CLASS (GET_MODE (x)) != MODE_INT)))
+	  /* Can't do anything for these, if the original type mode
+	     isn't known or can't be converted.  */;
+	else if (REG_P (x))
 	  {
 	    cselib_val *val = cselib_lookup (x, GET_MODE (x), 0, VOIDmode);
 	    if (val && cselib_preserved_value_p (val))
-	      item = gen_rtx_CONCAT (GET_MODE (x), x, val->val_rtx);
+	      item = val->val_rtx;
 	    else if (GET_MODE_CLASS (GET_MODE (x)) == MODE_INT)
 	      {
 		enum machine_mode mode = GET_MODE (x);
@@ -5749,10 +5756,7 @@ prepare_call_arguments (basic_block bb, rtx insn)
 		    val = cselib_lookup (reg, mode, 0, VOIDmode);
 		    if (val && cselib_preserved_value_p (val))
 		      {
-			item = gen_rtx_CONCAT (GET_MODE (x), x,
-					       lowpart_subreg (GET_MODE (x),
-							       val->val_rtx,
-							       mode));
+			item = val->val_rtx;
 			break;
 		      }
 		  }
@@ -5776,7 +5780,7 @@ prepare_call_arguments (basic_block bb, rtx insn)
 	      }
 	    val = cselib_lookup (mem, GET_MODE (mem), 0, VOIDmode);
 	    if (val && cselib_preserved_value_p (val))
-	      item = gen_rtx_CONCAT (GET_MODE (x), copy_rtx (x), val->val_rtx);
+	      item = val->val_rtx;
 	    else if (GET_MODE_CLASS (GET_MODE (mem)) != MODE_INT)
 	      {
 		/* For non-integer stack argument see also if they weren't
@@ -5787,15 +5791,22 @@ prepare_call_arguments (basic_block bb, rtx insn)
 		    val = cselib_lookup (adjust_address_nv (mem, imode, 0),
 					 imode, 0, VOIDmode);
 		    if (val && cselib_preserved_value_p (val))
-		      item = gen_rtx_CONCAT (GET_MODE (x), copy_rtx (x),
-					     lowpart_subreg (GET_MODE (x),
-							     val->val_rtx,
-							     imode));
+		      item = lowpart_subreg (GET_MODE (x), val->val_rtx,
+					     imode);
 		  }
 	      }
 	  }
 	if (item)
-	  call_arguments = gen_rtx_EXPR_LIST (VOIDmode, item, call_arguments);
+	  {
+	    rtx x2 = x;
+	    if (GET_MODE (item) != GET_MODE (link))
+	      item = lowpart_subreg (GET_MODE (link), item, GET_MODE (item));
+	    if (GET_MODE (x2) != GET_MODE (link))
+	      x2 = lowpart_subreg (GET_MODE (link), x2, GET_MODE (x2));
+	    item = gen_rtx_CONCAT (GET_MODE (link), x2, item);
+	    call_arguments
+	      = gen_rtx_EXPR_LIST (VOIDmode, item, call_arguments);
+	  }
 	if (t && t != void_list_node)
 	  {
 	    tree argtype = TREE_VALUE (t);