PATCH: extra machine-dependent passes

[DJ Delorie]

On a port I'm working on, one register needs to be treated specially.
I've tried various other things, but I really need to tweak the insn
list at key places before register allocation to get it right.  I
added two new machine dependent hooks, modelled after the existing
MACHINE_DEPENDENT_REORG.  Ok to apply?

2001-06-15  DJ Delorie  <dj@redhat.com>

	* toplev.c (rest_of_compilation): Add target-dependent macros
	MACHINE_DEPENDENT_POSTINLINE and MACHINE_DEPENDENT_PREALLOC
	for extra target-specific passes.

Index: toplev.c
===================================================================
RCS file: /cvs/gcc/gcc/gcc/toplev.c,v
retrieving revision 1.470
diff -p -3 -r1.470 toplev.c
*** toplev.c	2001/06/13 03:21:48	1.470
--- toplev.c	2001/06/15 20:18:28
*************** rest_of_compilation (decl)
*** 2944,2949 ****
--- 2944,2953 ----
        goto exit_rest_of_compilation;
      }
  
+ #ifdef MACHINE_DEPENDENT_POSTINLINE
+   MACHINE_DEPENDENT_POSTINLINE (insns);
+ #endif
+ 
    timevar_push (TV_JUMP);
  
    if (optimize > 0)
*************** rest_of_compilation (decl)
*** 3364,3369 ****
--- 3368,3377 ----
        close_dump_file (DFI_ce, print_rtl_with_bb, insns);
        timevar_pop (TV_IFCVT);
      }
+ 
+ #ifdef MACHINE_DEPENDENT_PREALLOC
+   MACHINE_DEPENDENT_PREALLOC (insns);
+ #endif
  
    /* Register allocation pre-pass, to reduce number of moves
       necessary for two-address machines.  */
Index: doc/tm.texi
===================================================================
RCS file: /cvs/gcc/gcc/gcc/doc/tm.texi,v
retrieving revision 1.4
diff -p -3 -r1.4 tm.texi
*** tm.texi	2001/06/14 22:51:18	1.4
--- tm.texi	2001/06/15 20:18:46
*************** slot of @var{insn}.
*** 8330,8335 ****
--- 8330,8350 ----
  
  You need not define this macro if it would always return zero.
  
+ @findex MACHINE_DEPENDENT_POSTINLINE
+ @item MACHINE_DEPENDENT_POSTINLINE (@var{insn})
+ In rare cases, correct code generation requires extra machine dependent
+ processing just after function inlining (say, to emit moves between
+ function-specific pseudos created by the back end).  On those machines,
+ define this macro as a C statement to act on the code starting at
+ @var{insn}.
+ 
+ @findex MACHINE_DEPENDENT_PREALLOC
+ @item MACHINE_DEPENDENT_PREALLOC (@var{insn})
+ In rare cases, optimal code generation requires extra machine dependent
+ processing just before register allocation (say, assigning a special
+ pseudo to a hard register).  On those machines, define this macro as a C
+ statement to act on the code starting at @var{insn}.
+ 
  @findex MACHINE_DEPENDENT_REORG
  @item MACHINE_DEPENDENT_REORG (@var{insn})
  In rare cases, correct code generation requires extra machine