[gcc r17-2600] middle-end: enable ranger in gimple-isel

https://gcc.gnu.org/g:888b4d45e854d207d08b979affb9ba06311daf52

commit r17-2600-g888b4d45e854d207d08b979affb9ba06311daf52
Author: Tamar Christina <[email protected]>
Date:   Tue Jul 21 20:48:04 2026 +0100

    middle-end: enable ranger in gimple-isel
    
    This enables ranger for use in isel to do some ranged based foldings.
    
    gcc/ChangeLog:
    
            * gimple-isel.cc (pass_gimple_isel::execute): Enable and disable ranger
            on fun.

Diff:
---
 gcc/gimple-isel.cc | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/gcc/gimple-isel.cc b/gcc/gimple-isel.cc
index b193e27b183e..25c11d645405 100644
--- a/gcc/gimple-isel.cc
+++ b/gcc/gimple-isel.cc
@@ -40,6 +40,8 @@ along with GCC; see the file COPYING3.  If not see
 #include "gimple-fold.h"
 #include "internal-fn.h"
 #include "fold-const.h"
+#include "gimple-range.h"
+
 
 /* Expand all ARRAY_REF(VIEW_CONVERT_EXPR) gimple assignments into calls to
    internal function based on vector type of selected expansion.
@@ -1352,6 +1354,8 @@ pass_gimple_isel::execute (struct function *fun)
   gimple_stmt_iterator gsi;
   basic_block bb;
   bool cfg_changed = false;
+  if (optimize)
+    enable_ranger (fun);
 
   FOR_EACH_BB_FN (bb, fun)
     {
@@ -1390,6 +1394,8 @@ pass_gimple_isel::execute (struct function *fun)
 	}
     }
 
+  if (optimize)
+    disable_ranger (fun);
   return cfg_changed ? TODO_cleanup_cfg : 0;
 }