[gcc r13-1999] Remove --param max-fsm-thread-length

[Richard Biener]

https://gcc.gnu.org/g:c64ef5cd92c2e340caabc95f4a28c9a125e8b5b8

commit r13-1999-gc64ef5cd92c2e340caabc95f4a28c9a125e8b5b8
Author: Richard Biener <rguenther@suse.de>
Date:   Mon Aug 8 14:04:43 2022 +0200

    Remove --param max-fsm-thread-length
    
    This removes max-fsm-thread-length which is obsoleted by
    max-jump-thread-paths.
    
            * doc/invoke.texi (max-fsm-thread-length): Remove.
            * params.opt (max-fsm-thread-length): Likewise.
            * tree-ssa-threadbackward.cc
            (back_threader_profitability::profitable_path_p): Do not
            check max-fsm-thread-length.

Diff:
---
 gcc/doc/invoke.texi            | 3 ---
 gcc/params.opt                 | 4 ----
 gcc/tree-ssa-threadbackward.cc | 9 ---------
 3 files changed, 16 deletions(-)

diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index f01696696bf..58e422041e4 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -15262,9 +15262,6 @@ Emit instrumentation calls to __tsan_func_entry() and __tsan_func_exit().
 Maximum number of instructions to copy when duplicating blocks on a
 finite state automaton jump thread path.
 
-@item max-fsm-thread-length
-Maximum number of basic blocks on a jump thread path.
-
 @item threader-debug
 threader-debug=[none|all] Enables verbose dumping of the threader solver.
 
diff --git a/gcc/params.opt b/gcc/params.opt
index 132987343c6..201b5c9f56f 100644
--- a/gcc/params.opt
+++ b/gcc/params.opt
@@ -498,10 +498,6 @@ The maximum number of nested indirect inlining performed by early inliner.
 Common Joined UInteger Var(param_max_fields_for_field_sensitive) Param
 Maximum number of fields in a structure before pointer analysis treats the structure as a single variable.
 
--param=max-fsm-thread-length=
-Common Joined UInteger Var(param_max_fsm_thread_length) Init(10) IntegerRange(1, 999999) Param Optimization
-Maximum number of basic blocks on a jump thread path.
-
 -param=max-fsm-thread-path-insns=
 Common Joined UInteger Var(param_max_fsm_thread_path_insns) Init(100) IntegerRange(1, 999999) Param Optimization
 Maximum number of instructions to copy when duplicating blocks on a finite state automaton jump thread path.
diff --git a/gcc/tree-ssa-threadbackward.cc b/gcc/tree-ssa-threadbackward.cc
index a5f8f141071..30047c654fb 100644
--- a/gcc/tree-ssa-threadbackward.cc
+++ b/gcc/tree-ssa-threadbackward.cc
@@ -569,15 +569,6 @@ back_threader_profitability::profitable_path_p (const vec<basic_block> &m_path,
   if (m_path.length () <= 1)
       return false;
 
-  if (m_path.length () > (unsigned) param_max_fsm_thread_length)
-    {
-      if (dump_file && (dump_flags & TDF_DETAILS))
-	fprintf (dump_file, "  FAIL: Jump-thread path not considered: "
-		 "the number of basic blocks on the path "
-		 "exceeds PARAM_MAX_FSM_THREAD_LENGTH.\n");
-      return false;
-    }
-
   int n_insns = 0;
   gimple_stmt_iterator gsi;
   loop_p loop = m_path[0]->loop_father;