[Bug tree-optimization/114151] [14 Regression] weird and inefficient codegen and addressing modes since g:a0b1798042d033fd2cc2c806afbb77875dd2909b

[rguenth at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114151

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Yep, it seems to only pick up global ranges that way.

diff --git a/gcc/tree-ssa-loop-ivopts.cc b/gcc/tree-ssa-loop-ivopts.cc
index 7cae5bdefea..626fc5bf5d7 100644
--- a/gcc/tree-ssa-loop-ivopts.cc
+++ b/gcc/tree-ssa-loop-ivopts.cc
@@ -132,6 +132,7 @@ along with GCC; see the file COPYING3.  If not see
 #include "tree-vectorizer.h"
 #include "dbgcnt.h"
 #include "cfganal.h"
+#include "gimple-range.h"

 /* For lang_hooks.types.type_for_mode.  */
 #include "langhooks.h"
@@ -8280,6 +8281,8 @@ tree_ssa_iv_optimize (void)
   tree_ssa_iv_optimize_init (&data);
   mark_ssa_maybe_undefs ();

+  enable_ranger (cfun);
+
   /* Optimize the loops starting with the innermost ones.  */
   for (auto loop : loops_list (cfun, LI_FROM_INNERMOST))
     {
@@ -8292,6 +8295,8 @@ tree_ssa_iv_optimize (void)
       tree_ssa_iv_optimize_loop (&data, loop, toremove);
     }

+  disable_ranger (cfun);
+
   /* Remove eliminated IV defs.  */
   release_defs_bitset (toremove);