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

@@ -80,9 +80,9 @@ Boston, MA 02111-1307, USA.  */
    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, ""},
+  {"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.  */