[PATCH 2/5] Convert Walloca pass to RANGE_QUERY(cfun).

[Aldy Hernandez via Gcc-patches]

This patch converts the Walloca pass to use an on-demand ranger
accesible with RANGE_QUERY instead of having to create a ranger and pass
it around.

Tested on x86-64 Linux.

OK?

gcc/ChangeLog:

        * gimple-ssa-warn-alloca.c (alloca_call_type): Use RANGE_QUERY
        instead of query argument.
        (pass_walloca::execute): Enable and disable global ranger.
---
 gcc/gimple-ssa-warn-alloca.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/gcc/gimple-ssa-warn-alloca.c b/gcc/gimple-ssa-warn-alloca.c
index e9a24d4d1d0..12f4bce3be8 100644
--- a/gcc/gimple-ssa-warn-alloca.c
+++ b/gcc/gimple-ssa-warn-alloca.c
@@ -165,7 +165,7 @@ adjusted_warn_limit (bool idx)
 // call was created by the gimplifier for a VLA.
 
 static class alloca_type_and_limit
-alloca_call_type (range_query &query, gimple *stmt, bool is_vla)
+alloca_call_type (gimple *stmt, bool is_vla)
 {
   gcc_assert (gimple_alloca_call_p (stmt));
   tree len = gimple_call_arg (stmt, 0);
@@ -217,7 +217,7 @@ alloca_call_type (range_query &query, gimple *stmt, bool 
is_vla)
   int_range_max r;
   if (warn_limit_specified_p (is_vla)
       && TREE_CODE (len) == SSA_NAME
-      && query.range_of_expr (r, len, stmt)
+      && RANGE_QUERY (cfun)->range_of_expr (r, len, stmt)
       && !r.varying_p ())
     {
       // The invalid bits are anything outside of [0, MAX_SIZE].
@@ -256,7 +256,7 @@ in_loop_p (gimple *stmt)
 unsigned int
 pass_walloca::execute (function *fun)
 {
-  gimple_ranger ranger;
+  enable_ranger ();
   basic_block bb;
   FOR_EACH_BB_FN (bb, fun)
     {
@@ -290,7 +290,7 @@ pass_walloca::execute (function *fun)
            continue;
 
          class alloca_type_and_limit t
-           = alloca_call_type (ranger, stmt, is_vla);
+           = alloca_call_type (stmt, is_vla);
 
          unsigned HOST_WIDE_INT adjusted_alloca_limit
            = adjusted_warn_limit (false);
@@ -383,6 +383,7 @@ pass_walloca::execute (function *fun)
            }
        }
     }
+  disable_ranger ();
   return 0;
 }
 
-- 
2.31.1