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Remove --param=threader-iterative.

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This was meant to be an internal construct, but I see folks are using
it and submitting PRs against it.  Let's just remove this to avoid
further confusion.

Tested on x86-64 Linux.

gcc/ChangeLog:

	PR tree-optimization/101724
	* params.opt: Remove --param=threader-iterative.
	* tree-ssa-threadbackward.c (pass_thread_jumps::execute): Remove
	iterative mode.
This commit is contained in:
Aldy Hernandez 2021-08-02 15:12:30 +02:00
parent 7d8577dd46
commit cac2353f8b
2 changed files with 2 additions and 20 deletions
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4
gcc/params.opt
View File

@ -1010,10 +1010,6 @@ Maximum depth of DFS walk used by modref escape analysis.
Common Joined UInteger Var(param_modref_max_escape_points) Init(256) Param Optimization
Maximum number of escape points tracked by modref per SSA-name.
-param=threader-iterative=
Common Joined UInteger Var(param_threader_iterative) Init(0) Param Optimization
Run backwards threader in iterative mode.
-param=threader-mode=
Common Joined Var(param_threader_mode) Enum(threader_mode) Init(THREADER_MODE_RANGER) Param Optimization
--param=threader-mode=[legacy|ranger] Specifies the mode the backwards threader should run in.

18
gcc/tree-ssa-threadbackward.c
View File

@ -1342,24 +1342,10 @@ pass_thread_jumps::execute (function *fun)
{
loop_optimizer_init (LOOPS_HAVE_PREHEADERS | LOOPS_HAVE_SIMPLE_LATCHES);
// Iterative mode is a testing construct and is not meant for public
// consumption. It is OFF by default.
bool iterative = param_threader_iterative;
bool changed = false;
while (try_thread_blocks (fun))
{
changed = true;
if (!iterative)
break;
if ((param_threader_mode & THREADER_MODE_RANGER) == 0)
break;
cleanup_tree_cfg (TODO_update_ssa);
}
bool changed = try_thread_blocks (fun);
loop_optimizer_finalize ();
return changed ? TODO_cleanup_cfg : 0;
}