This patch adds opt_for_fn for all cross module params used by inliner
so they can be modified at function granuality.  With inlining almost always
there are three functions to consider (callee and caller of the inlined edge
and the outer function caller is inlined to).

I always use the outer function params since that is how local parameters
behave.  I hope it is kind of what is also expected in most case: it is better
to inline agressively into -O3 compiled code rather than inline agressively -O3
functions into their callers.

New params infrastructure is nice.  One drawback is that is very hard to
search for individual param uses since they all occupy global namespace.
With C++ world we had chance to do something like params.param_flag_name
or params::param_flag_name instead...

Bootstrapped/regtested x86_64-linux, comitted.

	* cif-code.def (MAX_INLINE_INSNS_SINGLE_O2_LIMIT): Remove.
	* doc/invoke.texi (max-inline-insns-single-O2,
	inline-heuristics-hint-percent-O2, inline-min-speedup-O2,
	early-inlining-insns-O2): Remove documentation.
	* ipa-fnsummary.c (analyze_function_body,
	compute_fn_summary): Use opt_for_fn when accessing parameters.
	* ipa-inline.c (caller_growth_limits, can_inline_edge_p,
	inline_insns_auto, can_inline_edge_by_limits_p,
	want_early_inline_function_p, big_speedup_p,
	want_inline_small_function_p, want_inline_self_recursive_call_p,
	recursive_inlining, compute_max_insns, inline_small_functions):
	Likewise.
	* opts.c (default_options): Add -O3 defaults for
	OPT__param_early_inlining_insns_,
	OPT__param_inline_heuristics_hint_percent_,
	OPT__param_inline_min_speedup_, OPT__param_max_inline_insns_single_.
	* params.opt (-param=early-inlining-insns-O2=,
	-param=inline-heuristics-hint-percent-O2=,
	-param=inline-min-speedup-O2=, -param=max-inline-insns-single-O2=
	-param=early-inlining-insns=, -param=inline-heuristics-hint-percent=,
	-param=inline-min-speedup=, -param=inline-unit-growth=,
	-param=large-function-growth=, -param=large-stack-frame=,
	-param=large-stack-frame-growth=, -param=large-unit-insns=,
	-param=max-inline-insns-recursive=,
	-param=max-inline-insns-recursive-auto=,
	-param=max-inline-insns-single=,
	-param=max-inline-insns-size=, -param=max-inline-insns-small=,
	-param=max-inline-recursive-depth=,
	-param=max-inline-recursive-depth-auto=,
	-param=min-inline-recursive-probability=,
	-param=partial-inlining-entry-probability=,
	-param=uninlined-function-insns=, -param=uninlined-function-time=,
	-param=uninlined-thunk-insns=, -param=uninlined-thunk-time=): Add
	Optimization.

	* g++.dg/tree-ssa/pr53844.C: Drop -O2 from param name.
	* g++.dg/tree-ssa/pr61034.C: Likewise.
	* g++.dg/tree-ssa/pr8781.C: Likewise.
	* g++.dg/warn/Wstringop-truncation-1.C: Likewise.
	* gcc.dg/ipa/pr63416.c: Likewise.
	* gcc.dg/tree-ssa/ssa-thread-12.c: Likewise.
	* gcc.dg/vect/pr66142.c: Likewise.
	* gcc.dg/winline-3.c: Likewise.
	* gcc.target/powerpc/pr72804.c: Likewise.

From-SVN: r278644