regclass.c (init_reg_sets): Move code that calculates tables dependent on…

regclass.c (init_reg_sets): Move code that calculates tables dependent on reg_class_contents from here...

	* regclass.c (init_reg_sets): Move code that calculates tables
	dependent on reg_class_contents from here...
	(init_reg_sets_1): To here.

From-SVN: r23858

gcc/ChangeLog

+Wed Nov 25 20:11:04 1998  J"orn Rennecke <amylaar@cygnus.co.uk>
+
+	* regclass.c (init_reg_sets): Move code that calculates tables
+	dependent on reg_class_contents from here...
+	(init_reg_sets_1): To here.
+
 Wed Nov 25 14:54:46 1998  Zack Weinberg  <zack@rabi.phys.columbia.edu>
 
         * cpplib.h: Delete struct import_file.  Add ihash element to

gcc/regclass.c

@@ -236,6 +236,25 @@ init_reg_sets ()
   bcopy (initial_call_used_regs, call_used_regs, sizeof call_used_regs);
   bzero (global_regs, sizeof global_regs);
 
+  /* Do any additional initialization regsets may need */
+  INIT_ONCE_REG_SET ();
+}
+
+/* After switches have been processed, which perhaps alter
+   `fixed_regs' and `call_used_regs', convert them to HARD_REG_SETs.  */
+
+static void
+init_reg_sets_1 ()
+{
+  register unsigned int i, j;
+
+  /* This macro allows the fixed or call-used registers
+     and the register classes to depend on target flags.  */
+
+#ifdef CONDITIONAL_REGISTER_USAGE
+  CONDITIONAL_REGISTER_USAGE;
+#endif
+
   /* Compute number of hard regs in each class.  */
 
   bzero ((char *) reg_class_size, sizeof reg_class_size);
@@ -339,25 +358,6 @@ init_reg_sets ()
 	}
     }
 
-  /* Do any additional initialization regsets may need */
-  INIT_ONCE_REG_SET ();
-}
-
-/* After switches have been processed, which perhaps alter
-   `fixed_regs' and `call_used_regs', convert them to HARD_REG_SETs.  */
-
-static void
-init_reg_sets_1 ()
-{
-  register unsigned int i, j;
-
-  /* This macro allows the fixed or call-used registers
-     to depend on target flags.  */
-
-#ifdef CONDITIONAL_REGISTER_USAGE
-  CONDITIONAL_REGISTER_USAGE;
-#endif
-
   /* Initialize "constant" tables.  */
 
   CLEAR_HARD_REG_SET (fixed_reg_set);

gcc/tm.texi

@@ -1357,9 +1357,17 @@ preserve the entire contents of a register across a call.
 @findex fixed_regs
 @findex call_used_regs
 @item CONDITIONAL_REGISTER_USAGE
-Zero or more C statements that may conditionally modify two variables
-@code{fixed_regs} and @code{call_used_regs} (both of type @code{char
-[]}) after they have been initialized from the two preceding macros.
+Zero or more C statements that may conditionally modify four variables
+@code{fixed_regs}, @code{call_used_regs}, @code{global_regs}
+(these three are of type @code{char []}) and @code{reg_class_contents}
+(of type @code{HARD_REG_SET}).
+Before the macro is called @code{fixed_regs}, @code{call_used_regs}
+and @code(reg_class_contents) have been initialized from 
+@code{FIXED_REGISTERS}, @code{CALL_USED_REGISTERS} and
+@code{REG_CLASS_CONTENTS}, respectively,
+@code{global_regs} has been cleared, and any @samp{-ffixed-@var{reg}},
+@samp{-fcall-used-@var{reg}} and @samp{-fcall-saved-@var{reg}} command
+options have been applied.
 
 This is necessary in case the fixed or call-clobbered registers depend
 on target flags.