arm.h (target_fp_name, [...]): Const-ify.

* arm.h (target_fp_name, structure_size_string, arm_cpu_select):
Const-ify.
* arm.c (target_fp_name, structure_size_string): Const-ify.
* arm.md (reload_inhi, reload_outhi): Make the scratch DImode.
* arm.c (arm_reload_in_hi): Handle cases when the input is still
a pseudo, make use of scratch registers for reloading the address
as appropriate.
(arm_reload_outhi): Similarly for when the output is still a pseudo.
* riscix.h (SUBTARGET_SWITCHES): Document.

From-SVN: r26368

gcc/ChangeLog

+Mon Apr 12 09:30:03 1999  Richard Earnshaw (rearnsha@arm.com)
+
+	* arm.h (target_fp_name, structure_size_string, arm_cpu_select):
+	Const-ify.
+	* arm.c (target_fp_name, structure_size_string): Const-ify.
+
+	* arm.md (reload_inhi, reload_outhi): Make the scratch DImode.
+	* arm.c (arm_reload_in_hi): Handle cases when the input is still
+	a pseudo, make use of scratch registers for reloading the address
+	as appropriate.
+	(arm_reload_outhi): Similarly for when the output is still a pseudo.
+
+	* riscix.h (SUBTARGET_SWITCHES): Document.
+
 1999-04-12  Bruce Korb <ddsinc09@ix.netcom.com>
 
 	* fixincludes:

gcc/config/arm/arm.h

@@ -248,7 +248,7 @@ Unrecognized value in TARGET_CPU_DEFAULT.
 extern int target_flags;
 
 /* The floating point instruction architecture, can be 2 or 3 */
-extern char * target_fp_name;
+extern const char * target_fp_name;
 
 /* Nonzero if the function prologue (and epilogue) should obey
    the ARM Procedure Call Standard.  */
@@ -404,9 +404,9 @@ function tries to return. */
 
 struct arm_cpu_select
 {
-  char *              string;
-  char *              name;
-  struct processors * processors;
+  const char *              string;
+  const char *              name;
+  const struct processors * processors;
 };
 
 /* This is a magic array.  If the user specifies a command line switch
@@ -585,7 +585,7 @@ extern int arm_is_6_or_7;
 #endif
 
 /* Used when parsing command line option -mstructure_size_boundary.  */
-extern char * structure_size_string;
+extern const char * structure_size_string;
 
 /* Non-zero if move instructions will actually fail to work
    when given unaligned data.  */

gcc/config/arm/arm.md

@@ -3128,11 +3128,13 @@
    mov%?\\t%0, %1\\t%@ movhi
    mvn%?\\t%0, #%B1\\t%@ movhi")
 
-
+;; We use a DImode scratch because we may occasionally need an additional
+;; temporary if the address isn't offsettable -- push_reload doesn't seem
+;; to take any notice of the "o" constraints on reload_memory_operand operand.
 (define_expand "reload_outhi"
   [(parallel [(match_operand:HI 0 "reload_memory_operand" "=o")
 	      (match_operand:HI 1 "s_register_operand" "r")
-	      (match_operand:SI 2 "s_register_operand" "=&r")])]
+	      (match_operand:DI 2 "s_register_operand" "=&r")])]
   ""
   "
   arm_reload_out_hi (operands);
@@ -3142,7 +3144,7 @@
 (define_expand "reload_inhi"
   [(parallel [(match_operand:HI 0 "s_register_operand" "=r")
 	      (match_operand:HI 1 "reload_memory_operand" "o")
-	      (match_operand:SI 2 "s_register_operand" "=&r")])]
+	      (match_operand:DI 2 "s_register_operand" "=&r")])]
   "TARGET_SHORT_BY_BYTES"
   "
   arm_reload_in_hi (operands);

gcc/config/arm/riscix.h

@@ -79,10 +79,10 @@ Boston, MA 02111-1307, USA.  */
 /* None of these is actually used in cc1.  If we don't define them in target
    switches cc1 complains about them.  For the sake of argument lets allocate
    bit 31 of target flags for such options.  */
-#define SUBTARGET_SWITCHES 		\
-{"bsd", 0x80000000, ""},		\
-{"xopen", 0x80000000, ""},		\
-{"no-symrename", 0x80000000, ""},
+#define SUBTARGET_SWITCHES						\
+  {"bsd",	   0x80000000, "Do symbol renaming for BSD"},		\
+  {"xopen",	   0x80000000, "Do symbol renaming for X/OPEN"},	\
+  {"no-symrename", 0x80000000, "Don't do symbol renaming"},
     
 
 /* Run-time Target Specification.  */