[gcc r12-3968] Use a separate TV_* timer for the VRP threader.

[gcc r12-3968] Use a separate TV_* timer for the VRP threader.

[Aldy Hernandez]

https://gcc.gnu.org/g:48c97c62c90eedfadd41793f438ed4187df65fd7

commit r12-3968-g48c97c62c90eedfadd41793f438ed4187df65fd7
Author: Aldy Hernandez <aldyh@redhat.com>
Date:   Wed Sep 29 17:16:49 2021 +0200

    Use a separate TV_* timer for the VRP threader.
    
    There seems to be a memory consumption issue on 32 bit hosts after the
    hybrid threader patchset.  I'm having a hard time reproducing, and in
    the process I've noticed that the threader is using the TV_TREE_VRP
    timer.  Having a distinct one could help diagnose this and other
    issues going forward.
    
    gcc/ChangeLog:
    
            * timevar.def (TV_TREE_VRP_THREADER): New.
            * tree-vrp.c: Use TV_TREE_VRP_THREADER for VRP threader pass.

Diff:
---
 gcc/timevar.def | 1 +
 gcc/tree-vrp.c  | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/gcc/timevar.def b/gcc/timevar.def
index 16d1657436c..f903833ce9e 100644
--- a/gcc/timevar.def
+++ b/gcc/timevar.def
@@ -158,6 +158,7 @@ DEFTIMEVAR (TV_TREE_CFG		     , "tree CFG construction")
 DEFTIMEVAR (TV_TREE_CLEANUP_CFG	     , "tree CFG cleanup")
 DEFTIMEVAR (TV_TREE_TAIL_MERGE       , "tree tail merge")
 DEFTIMEVAR (TV_TREE_VRP              , "tree VRP")
+DEFTIMEVAR (TV_TREE_VRP_THREADER     , "tree VRP threader")
 DEFTIMEVAR (TV_TREE_EARLY_VRP        , "tree Early VRP")
 DEFTIMEVAR (TV_TREE_COPY_PROP        , "tree copy propagation")
 DEFTIMEVAR (TV_FIND_REFERENCED_VARS  , "tree find ref. vars")
diff --git a/gcc/tree-vrp.c b/gcc/tree-vrp.c
index 5aded5edb11..db9f3cd0a2f 100644
--- a/gcc/tree-vrp.c
+++ b/gcc/tree-vrp.c
@@ -4449,7 +4449,7 @@ const pass_data pass_data_vrp_threader =
   GIMPLE_PASS, /* type */
   "vrp-thread", /* name */
   OPTGROUP_NONE, /* optinfo_flags */
-  TV_TREE_VRP, /* tv_id */
+  TV_TREE_VRP_THREADER, /* tv_id */
   PROP_ssa, /* properties_required */
   0, /* properties_provided */
   0, /* properties_destroyed */