[Bug tree-optimization/111345] New: `X % Y is smaller than Y.` pattern could be simpified

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111345

            Bug ID: 111345
           Summary: `X % Y is smaller than Y.` pattern could be simpified
           Product: gcc
           Version: 14.0
            Status: UNCONFIRMED
          Keywords: internal-improvement
          Severity: enhancement
          Priority: P3
         Component: tree-optimization
          Assignee: pinskia at gcc dot gnu.org
          Reporter: pinskia at gcc dot gnu.org
  Target Milestone: ---

Right now it is defined as:
```
(for cmp (lt ge)
 (simplify
  (cmp (trunc_mod @0 @1) @1)
  (if (TYPE_UNSIGNED (TREE_TYPE (@0)))
   { constant_boolean_node (cmp == LT_EXPR, type); })))
(for cmp (gt le)
 (simplify
  (cmp @1 (trunc_mod @0 @1))
  (if (TYPE_UNSIGNED (TREE_TYPE (@0)))
   { constant_boolean_node (cmp == GT_EXPR, type); })))
```

But it could be simplified to:
```
(for cmp (lt ge)
 (simplify
  (cmp:c (trunc_mod @0 @1) @1)
  (if (TYPE_UNSIGNED (TREE_TYPE (@0)))
   { constant_boolean_node (cmp == LT_EXPR, type); })))
```

This simplifies the written code but the produced code is the same ...