From 19ecbcbcbf88db0949db1e4eca1fa3dec291be05 Mon Sep 17 00:00:00 2001
From: Jakub Jelinek <jakub@gcc.gnu.org>
Date: Tue, 27 Sep 2011 18:16:57 +0200
Subject: [PATCH] common.opt: Add -foptimize-strlen option.

	* common.opt: Add -foptimize-strlen option.
	* Makefile.in (OBJS): Add tree-ssa-strlen.o.
	(tree-sssa-strlen.o): Add dependencies.
	* opts.c (default_options_table): Enable -foptimize-strlen
	by default at -O2 if not -Os.
	* passes.c (init_optimization_passes): Add pass_strlen
	after pass_object_sizes.
	* timevar.def (TV_TREE_STRLEN): New timevar.
	* params.def (PARAM_MAX_TRACKED_STRLENS): New parameter.
	* tree-pass.h (pass_strlen): Declare.
	* tree-ssa-strlen.c: New file.
	* c-decl.c (merge_decls): If compatible stpcpy prototype
	is seen, set implicit_built_in_decls[BUILT_IN_STPCPY].
cp/
	* decl.c (duplicate_decls): If compatible stpcpy prototype
	is seen, set implicit_built_in_decls[BUILT_IN_STPCPY].
testsuite/
	* gcc.dg/strlenopt-1.c: New test.
	* gcc.dg/strlenopt-1f.c: New test.
	* gcc.dg/strlenopt-2.c: New test.
	* gcc.dg/strlenopt-2f.c: New test.
	* gcc.dg/strlenopt-3.c: New test.
	* gcc.dg/strlenopt-4.c: New test.
	* gcc.dg/strlenopt-4g.c: New test.
	* gcc.dg/strlenopt-4gf.c: New test.
	* gcc.dg/strlenopt-5.c: New test.
	* gcc.dg/strlenopt-6.c: New test.
	* gcc.dg/strlenopt-7.c: New test.
	* gcc.dg/strlenopt-8.c: New test.
	* gcc.dg/strlenopt-9.c: New test.
	* gcc.dg/strlenopt-10.c: New test.
	* gcc.dg/strlenopt-11.c: New test.
	* gcc.dg/strlenopt-12.c: New test.
	* gcc.dg/strlenopt-12g.c: New test.
	* gcc.dg/strlenopt-13.c: New test.
	* gcc.dg/strlenopt-14g.c: New test.
	* gcc.dg/strlenopt-14gf.c: New test.
	* gcc.dg/strlenopt-15.c: New test.
	* gcc.dg/strlenopt-16g.c: New test.
	* gcc.dg/strlenopt-17g.c: New test.
	* gcc.dg/strlenopt-18g.c: New test.
	* gcc.dg/strlenopt.h: New file.

From-SVN: r179278
---
 gcc/params.def | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/gcc/params.def b/gcc/params.def
index 0adf0470a66..a795c38aefc 100644
--- a/gcc/params.def
+++ b/gcc/params.def
@@ -931,6 +931,14 @@ DEFPARAM (PARAM_MAX_TAIL_MERGE_ITERATIONS,
           "Maximum amount of iterations of the pass over a function",
           2, 0, 0)
 
+/* Maximum number of strings for which strlen optimization pass will
+   track string lenths.  */
+DEFPARAM (PARAM_MAX_TRACKED_STRLENS,
+	  "max-tracked-strlens",
+	  "Maximum number of strings for which strlen optimization pass will "
+	  "track string lengths",
+	  1000, 0, 0)
+
 /*
 Local variables:
 mode:c