[PATCH, PR 42585] Total scalarization of small records

[Steve Ellcey]

This patch breaks platforms that don't define their own MOVE_RATIO,
Since I haven't seen a patch to fix the problem, does someone want to
approve this patch to fix it?  Only MOVE_RATIO has to be in defaults.h
but I moved CLEAR_RATIO and SET_RATIO too in order to keep them
together.

I successully built this on ia64-hp-hpux11.23 and am currently running
the test suite.

Steve Ellcey
sje@cup.hp.com



2010-01-22  Steve Ellcey  <sje@cup.hp.com>

	* expr.h (MOVE_RATIO,CLEAR_RATIO,SET_RATIO): Move from here...
	* defaults.h: to here.


Index: expr.h
===================================================================
--- expr.h	(revision 156167)
+++ expr.h	(working copy)
@@ -61,37 +61,6 @@ enum expand_modifier {EXPAND_NORMAL = 0,
    more information.  */
 #define OK_DEFER_POP (inhibit_defer_pop -= 1)
 
-/* If a memory-to-memory move would take MOVE_RATIO or more simple
-   move-instruction sequences, we will do a movmem or libcall instead.  */
-
-#ifndef MOVE_RATIO
-#if defined (HAVE_movmemqi) || defined (HAVE_movmemhi) || defined (HAVE_movmemsi) || defined (HAVE_movmemdi) || defined (HAVE_movmemti)
-#define MOVE_RATIO(speed) 2
-#else
-/* If we are optimizing for space (-Os), cut down the default move ratio.  */
-#define MOVE_RATIO(speed) ((speed) ? 15 : 3)
-#endif
-#endif
-
-/* If a clear memory operation would take CLEAR_RATIO or more simple
-   move-instruction sequences, we will do a setmem or libcall instead.  */
-
-#ifndef CLEAR_RATIO
-#if defined (HAVE_setmemqi) || defined (HAVE_setmemhi) || defined (HAVE_setmemsi) || defined (HAVE_setmemdi) || defined (HAVE_setmemti)
-#define CLEAR_RATIO(speed) 2
-#else
-/* If we are optimizing for space, cut down the default clear ratio.  */
-#define CLEAR_RATIO(speed) ((speed) ? 15 :3)
-#endif
-#endif
-
-/* If a memory set (to value other than zero) operation would take
-   SET_RATIO or more simple move-instruction sequences, we will do a movmem
-   or libcall instead.  */
-#ifndef SET_RATIO
-#define SET_RATIO(speed) MOVE_RATIO(speed)
-#endif
-
 enum direction {none, upward, downward};
 
 /* Structure to record the size of a sequence of arguments
Index: defaults.h
===================================================================
--- defaults.h	(revision 156167)
+++ defaults.h	(working copy)
@@ -1161,4 +1161,35 @@ see the files COPYING3 and COPYING.RUNTI
 #define CONSTANT_ADDRESS_P(X)   (CONSTANT_P (X) && GET_CODE (X) != CONST_DOUBLE)
 #endif
 
+/* If a memory-to-memory move would take MOVE_RATIO or more simple
+   move-instruction sequences, we will do a movmem or libcall instead.  */
+
+#ifndef MOVE_RATIO
+#if defined (HAVE_movmemqi) || defined (HAVE_movmemhi) || defined (HAVE_movmemsi) || defined (HAVE_movmemdi) || defined (HAVE_movmemti)
+#define MOVE_RATIO(speed) 2
+#else
+/* If we are optimizing for space (-Os), cut down the default move ratio.  */
+#define MOVE_RATIO(speed) ((speed) ? 15 : 3)
+#endif
+#endif
+
+/* If a clear memory operation would take CLEAR_RATIO or more simple
+   move-instruction sequences, we will do a setmem or libcall instead.  */
+
+#ifndef CLEAR_RATIO
+#if defined (HAVE_setmemqi) || defined (HAVE_setmemhi) || defined (HAVE_setmemsi) || defined (HAVE_setmemdi) || defined (HAVE_setmemti)
+#define CLEAR_RATIO(speed) 2
+#else
+/* If we are optimizing for space, cut down the default clear ratio.  */
+#define CLEAR_RATIO(speed) ((speed) ? 15 :3)
+#endif
+#endif
+
+/* If a memory set (to value other than zero) operation would take
+   SET_RATIO or more simple move-instruction sequences, we will do a movmem
+   or libcall instead.  */
+#ifndef SET_RATIO
+#define SET_RATIO(speed) MOVE_RATIO(speed)
+#endif
+
 #endif  /* ! GCC_DEFAULTS_H */