[vta] get ppc64 to pass bootstrap-debug and bootstrap4-debug(-g0)

[Alexandre Oliva <aoliva at redhat dot com>]

This is the only ppc-specific patch I needed for ppc64-linux-gnu to
generate the same code for host and target directories in a full
bootstrap with all languages.

Most of them would be obviated by changing the debug insn pattern to
(use (var_location)) rather than just (var_location), but the memory
waste is not worth it.

I'm installing this in the vta branch.

for  gcc/ChangeLog.vta
from  Alexandre Oliva  <aoliva@redhat.com>

	* config/rs6000/rs6000.c (is_microcoded_insn): Exclude debug insns.
	(is_cracked_insn, is_branch_slot_insn): Likewise.
	(is_nonpipeline_insn, insn_must_be_first_in_group): Likewise.
	(insn_must_be_last_in_group): Likewise.
	(force_new_group): Let debug insns through.

Index: gcc/config/rs6000/rs6000.c
===================================================================
--- gcc/config/rs6000/rs6000.c.orig	2007-12-28 16:16:54.000000000 -0200
+++ gcc/config/rs6000/rs6000.c	2007-12-31 14:59:51.000000000 -0200
@@ -17940,7 +17940,7 @@ rs6000_adjust_cost (rtx insn, rtx link, 
 static bool
 is_microcoded_insn (rtx insn)
 {
-  if (!insn || !INSN_P (insn)
+  if (!insn || !INSN_P (insn) || DEBUG_INSN_P (insn)
       || GET_CODE (PATTERN (insn)) == USE
       || GET_CODE (PATTERN (insn)) == CLOBBER)
     return false;
@@ -17968,7 +17968,7 @@ is_microcoded_insn (rtx insn)
 static bool
 is_cracked_insn (rtx insn)
 {
-  if (!insn || !INSN_P (insn)
+  if (!insn || !INSN_P (insn) || DEBUG_INSN_P (insn)
       || GET_CODE (PATTERN (insn)) == USE
       || GET_CODE (PATTERN (insn)) == CLOBBER)
     return false;
@@ -17996,7 +17996,7 @@ is_cracked_insn (rtx insn)
 static bool
 is_branch_slot_insn (rtx insn)
 {
-  if (!insn || !INSN_P (insn)
+  if (!insn || !INSN_P (insn) || DEBUG_INSN_P (insn)
       || GET_CODE (PATTERN (insn)) == USE
       || GET_CODE (PATTERN (insn)) == CLOBBER)
     return false;
@@ -18156,7 +18156,7 @@ static bool
 is_nonpipeline_insn (rtx insn)
 {
   enum attr_type type;
-  if (!insn || !INSN_P (insn)
+  if (!insn || !INSN_P (insn) || DEBUG_INSN_P (insn)
       || GET_CODE (PATTERN (insn)) == USE
       || GET_CODE (PATTERN (insn)) == CLOBBER)
     return false;
@@ -18721,8 +18721,8 @@ insn_must_be_first_in_group (rtx insn)
   enum attr_type type;
 
   if (!insn
-      || insn == NULL_RTX
       || GET_CODE (insn) == NOTE
+      || DEBUG_INSN_P (insn)
       || GET_CODE (PATTERN (insn)) == USE
       || GET_CODE (PATTERN (insn)) == CLOBBER)
     return false;
@@ -18817,8 +18817,8 @@ insn_must_be_last_in_group (rtx insn)
   enum attr_type type;
 
   if (!insn
-      || insn == NULL_RTX
       || GET_CODE (insn) == NOTE
+      || DEBUG_INSN_P (insn)
       || GET_CODE (PATTERN (insn)) == USE
       || GET_CODE (PATTERN (insn)) == CLOBBER)
     return false;
@@ -18927,7 +18927,7 @@ force_new_group (int sched_verbose, FILE
   bool end = *group_end;
   int i;
 
-  if (next_insn == NULL_RTX)
+  if (next_insn == NULL_RTX || DEBUG_INSN_P (next_insn))
     return can_issue_more;
 
   if (rs6000_sched_insert_nops > sched_finish_regroup_exact)

-- 
Alexandre Oliva         http://www.lsd.ic.unicamp.br/~oliva/
FSF Latin America Board Member         http://www.fsfla.org/
Red Hat Compiler Engineer   aoliva@{redhat.com, gcc.gnu.org}
Free Software Evangelist  oliva@{lsd.ic.unicamp.br, gnu.org}