pa.h (DONT_RECORD_EQUIVALENCE): Kill.

        * pa.h (DONT_RECORD_EQUIVALENCE): Kill.
        * local-alloc.c (update_equiv_regs): Corresponding changes.
        * tm.texi (DONT_RECORD_EQUIVALENCE): Kill.

From-SVN: r24541

gcc/ChangeLog

@@ -12,6 +12,10 @@ Wed Jan  6 17:55:19 1999  Robert Lipe  <robertlipe@usa.net>
 
 Wed Jan  6 16:08:54 1999  Jeffrey A Law  (law@cygnus.com)
 
+	* pa.h (DONT_RECORD_EQUIVALENCE): Kill.
+	* local-alloc.c (update_equiv_regs): Corresponding changes.
+	* tm.texi (DONT_RECORD_EQUIVALENCE): Kill.
+
 	* calls.c (special_function_p): Push alloca test inside the large
 	conditional which excludes functions not at file scope or not
 	extern.  

gcc/config/pa/pa.h

 /* Definitions of target machine for GNU compiler, for the HP Spectrum.
-   Copyright (C) 1992, 93, 94, 95, 96, 97, 1998 Free Software Foundation, Inc.
+   Copyright (C) 1992, 93-98, 1999 Free Software Foundation, Inc.
    Contributed by Michael Tiemann (tiemann@cygnus.com) of Cygnus Support
    and Tim Moore (moore@defmacro.cs.utah.edu) of the Center for
    Software Science at the University of Utah.
@@ -810,20 +810,6 @@ int zdepi_cint_p ();
 #define CLASS_MAX_NREGS(CLASS, MODE)					\
   (!TARGET_SNAKE && (CLASS) == FP_REGS ? 1 :				\
    ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD))
-
-/* We do not want to record equivalences for expressions which are
-   likely to cause a spill of %r1 if they are used by reload.
-
-   Nor do we want to record an equivalence of a constant expression
-   that the target can not handle appearing in an insn, but which
-   also must be accepted by LEGITIMATE_CONSTANT_P.
-
-   On the PA, these two goals are the same -- don't record any equivalences
-   for symbolic operands that are not read_only_operands.  */
-#define DONT_RECORD_EQUIVALENCE(NOTE) \
-  (symbolic_operand (XEXP (NOTE, 0), VOIDmode) \
-   && !read_only_operand (XEXP (NOTE, 0), VOIDmode))
-
 
 /* Stack layout; function entry, exit and calling.  */
 

gcc/local-alloc.c

@@ -796,22 +796,6 @@ update_equiv_regs ()
 
       note = find_reg_note (insn, REG_EQUAL, NULL_RTX);
 
-#ifdef DONT_RECORD_EQUIVALENCE
-      /* Allow the target to reject promotions of some REG_EQUAL notes to
-	 REG_EQUIV notes.
-
-	 In some cases this can improve register allocation if the existence
-	 of the REG_EQUIV note is likely to increase the lifetime of a register
-	 that is likely to be spilled.
-
-	 It may also be necessary if the target can't handle certain constant
-	 expressions appearing randomly in insns, but for whatever reason
-	 those expressions must be considered legitimate constant expressions
-	 to prevent them from being forced into memory.  */
-      if (note && DONT_RECORD_EQUIVALENCE (note))
-        note = NULL;
-#endif
-
       if (REG_N_SETS (regno) != 1
 	  && (! note
 	      || ! function_invariant_p (XEXP (note, 0))

gcc/tm.texi

-@c Copyright (C) 1988,89,92,93,94,96,97,1998 Free Software Foundation, Inc.
+@c Copyright (C) 1988,89,92,93,94,96,97,98,1999 Free Software Foundation, Inc.
 @c This is part of the GCC manual.
 @c For copying conditions, see the file gcc.texi.
 
@@ -4389,16 +4389,6 @@ an immediate operand on the target machine.  You can assume that
 @var{x} satisfies @code{CONSTANT_P}, so you need not check this.  In fact,
 @samp{1} is a suitable definition for this macro on machines where
 anything @code{CONSTANT_P} is valid.@refill
-
-@findex DONT_RECORD_EQUIVALENCE
-@item DONT_RECORD_EQUIVALENCE (@var{note})
-A C expression that is nonzero if the @code{REG_EQUAL} note @var{x} should not
-be promoted to a @code{REG_EQUIV} note.
-
-Define this macro if @var{note} refers to a constant that must be accepted
-by @code{LEGITIMATE_CONSTANT_P}, but must not appear as an immediate operand.
-
-Most machine descriptions do not need to define this macro.
 @end table
 
 @node Condition Code