More useful .greg dumps

[Bernd Schmidt <bernds at redhat dot co dot uk>]

When debugging reload, it would be nice to get a dump of the insns left after
it completes.  However, the .greg dump is done after a few other optimization
passes have been run, e.g. reload_cse_regs and most importantly
split_all_insns, making the dump less useful than it could be.

This patch splits up .19.greg into .19.greg (done after reload) and
.20.postreload (done immediately before flow2).


Bernd

	* invoke.texi (Debugging Options): Describe -do.
	* toplev.c (enum_dump_file_index): New entry DFI_postreload.
	(dump_file): Likewise.
	(rest_of_compilation): Split .greg dump into .greg and .postreload.

Index: invoke.texi
===================================================================
RCS file: /cvs/gcc/egcs/gcc/invoke.texi,v
retrieving revision 1.232
diff -u -p -r1.232 invoke.texi
--- invoke.texi	2000/10/29 17:37:50	1.232
+++ invoke.texi	2000/10/30 15:04:02
@@ -2379,13 +2379,13 @@ Annotate the assembler output with misce
 @item b
 Dump after computing branch probabilities, to @file{@var{file}.11.bp}.
 @item B
-Dump after block reordering, to @file{@var{file}.25.bbro}.
+Dump after block reordering, to @file{@var{file}.26.bbro}.
 @item c
 Dump after instruction combination, to the file @file{@var{file}.14.combine}.
 @item C
 Dump after the first if conversion, to the file @file{@var{file}.15.ce}.
 @item d
-Dump after delayed branch scheduling, to @file{@var{file}.28.dbr}.
+Dump after delayed branch scheduling, to @file{@var{file}.29.dbr}.
 @item D
 Dump all macro definitions, at the end of preprocessing, in addition to
 normal output.
@@ -2393,13 +2393,15 @@ normal output.
 Dump after SSA optimizations, to @file{@var{file}.05.ssa} and
 @file{@var{file}.06.ussa}.
 @item E
-Dump after the second if conversion, to @file{@var{file}.21.ce2}.
+Dump after the second if conversion, to @file{@var{file}.24.ce2}.
 @item f
 Dump after life analysis, to @file{@var{file}.13.life}.
 @item F
 Dump after purging @code{ADDRESSOF} codes, to @file{@var{file}.04.addressof}.
 @item g
 Dump after global register allocation, to @file{@var{file}.19.greg}.
+@item o
+Dump after post-reload CSE and other optimizations, to @file{@var{file}.20.postreload}.
 @item G      
 Dump after GCSE, to @file{@var{file}.08.gcse}.
 @item i
@@ -2407,7 +2409,7 @@ Dump after sibling call optimizations, t
 @item j
 Dump after the first jump optimization, to @file{@var{file}.02.jump}.
 @item J
-Dump after the last jump optimization, to @file{@var{file}.26.jump2}.
+Dump after the last jump optimization, to @file{@var{file}.27.jump2}.
 @item k
 Dump after conversion from registers to stack, to @file{@var{file}.29.stack}.
 @item l
@@ -2416,7 +2418,7 @@ Dump after local register allocation, to
 Dump after loop optimization, to @file{@var{file}.09.loop}.
 @item M
 Dump after performing the machine dependent reorganisation pass, to
-@file{@var{file}.27.mach}. 
+@file{@var{file}.28.mach}. 
 @item n
 Dump after register renumbering, to @file{@var{file}.23.rnreg}.
 @item N
@@ -2425,7 +2427,7 @@ Dump after the register move pass, to @f
 Dump after RTL generation, to @file{@var{file}.00.rtl}.
 @item R
 Dump after the second instruction scheduling pass, to
-@file{@var{file}.24.sched2}.
+@file{@var{file}.25.sched2}.
 @item s
 Dump after CSE (including the jump optimization that sometimes follows
 CSE), to @file{@var{file}.03.cse}. 
@@ -2436,7 +2438,7 @@ Dump after the first instruction schedul
 Dump after the second CSE pass (including the jump optimization that
 sometimes follows CSE), to @file{@var{file}.10.cse2}.
 @item w
-Dump after the second flow pass, to @file{@var{file}.20.flow2}.
+Dump after the second flow pass, to @file{@var{file}.21.flow2}.
 @item X
 Dump after dead code elimination, to @file{@var{file}.06.dce}.
 @item z
Index: toplev.c
===================================================================
RCS file: /cvs/gcc/egcs/gcc/toplev.c,v
retrieving revision 1.392
diff -u -p -r1.392 toplev.c
--- toplev.c	2000/10/29 19:34:52	1.392
+++ toplev.c	2000/10/30 15:04:05
@@ -276,6 +276,7 @@ enum dump_file_index
   DFI_sched,
   DFI_lreg,
   DFI_greg,
+  DFI_postreload,
   DFI_flow2,
   DFI_peephole2,
   DFI_rnreg,
@@ -320,6 +321,7 @@ struct dump_file_info dump_file[DFI_MAX]
   { "sched",	'S', 1, 0, 0 },
   { "lreg",	'l', 1, 0, 0 },
   { "greg",	'g', 1, 0, 0 },
+  { "postreload", 'o', 1, 0, 0 },
   { "flow2",	'w', 1, 0, 0 },
   { "peephole2", 'z', 1, 0, 0 },
   { "rnreg",	'n', 1, 0, 0 },
@@ -3428,11 +3430,23 @@ rest_of_compilation (decl)
 
   timevar_pop (TV_GLOBAL_ALLOC);
 
+  if (dump_file[DFI_greg].enabled)
+    {
+      timevar_push (TV_DUMP);
+
+      dump_global_regs (rtl_dump_file);
+
+      close_dump_file (DFI_greg, print_rtl_with_bb, insns);
+      timevar_pop (TV_DUMP);
+    }
+
   if (failure)
     goto exit_rest_of_compilation;
 
   ggc_collect ();
 
+  open_dump_file (DFI_postreload, decl);
+
   /* Do a very simple CSE pass over just the hard registers.  */
   if (optimize > 0)
     {
@@ -3462,16 +3476,8 @@ rest_of_compilation (decl)
 
       timevar_pop (TV_JUMP);
     }
-
-  if (dump_file[DFI_greg].enabled)
-    {
-      timevar_push (TV_DUMP);
 
-      dump_global_regs (rtl_dump_file);
-
-      close_dump_file (DFI_greg, print_rtl_with_bb, insns);
-      timevar_pop (TV_DUMP);
-    }
+  close_dump_file (DFI_postreload, print_rtl_with_bb, insns);
 
   /* Re-create the death notes which were deleted during reload.  */
   timevar_push (TV_FLOW2);