crx.md: Make doloop_end pattern usage controllable via mloop-nesting=<max-nesting>...

	* config/crx/crx.md: Make doloop_end pattern usage controllable
	via mloop-nesting=<max-nesting> command line switch. Make sure
	the combiner cannot use doloop_end_<mode> in an illegal way.
	* config/crx/crx.c: Use regs up to r6 for argument passing.
	Refine crx_address_cost (non cst4 displacements are expensive).
	* config/crx/crx.opt: Add switch for mloop-nesting=.

From-SVN: r103518

gcc/ChangeLog

+2005-08-26  Paul Woegerer  <paul.woegerer@nsc.com>
+
+	* config/crx/crx.md: Make doloop_end pattern usage controllable
+	via mloop-nesting=<max-nesting> command line switch. Make sure
+	the combiner cannot use doloop_end_<mode> in an illegal way.
+	* config/crx/crx.c: Use regs up to r6 for argument passing.
+	Refine crx_address_cost (non cst4 displacements are expensive).
+	* config/crx/crx.opt: Add switch for mloop-nesting=.
+
 2005-08-26  Adrian Straetling  <straetling@de.ibm.com>
 
 	* config/s390/s390.md: ("movstr", "*movstr"): Add patterns.

gcc/config/crx/crx.c

@@ -54,7 +54,7 @@
 /*****************************************************************************/
 
 /* Maximum number of register used for passing parameters.  */
-#define MAX_REG_FOR_PASSING_ARGS 5
+#define MAX_REG_FOR_PASSING_ARGS 6
 
 /* Minimum number register used for passing parameters.  */
 #define MIN_REG_FOR_PASSING_ARGS 2
@@ -827,6 +827,15 @@ crx_address_cost (rtx addr)
   if (address.index && address.scale == 1)
     cost+=5;
 
+  if (address.disp && !INT_CST4 (INTVAL (address.disp)))
+    cost+=2;
+
+  if (TARGET_DEBUG_ADDR)
+    {
+      fprintf (stderr, "\n======\nTARGET_ADDRESS_COST = %d\n", cost);
+      debug_rtx (addr);
+    }
+  
   return cost;
 }
 

gcc/config/crx/crx.opt

@@ -27,5 +27,9 @@ mno-push-args
 Target Report RejectNegative Mask(NO_PUSH_ARGS)
 Do not use push to store function arguments
 
+mloop-nesting=
+Common RejectNegative Joined UInteger Var(crx_loop_nesting) Init(12)
+Restrict doloop to the given nesting level
+
 mdebug-addr
 Target RejectNegative Var(TARGET_DEBUG_ADDR) Undocumented