r193246 - in /trunk/gcc: cfgloop.h cfgloopanal....

[hubicka@gcc.gnu.org]

Author: hubicka
Date: Tue Nov  6 16:22:45 2012
New Revision: 193246

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=193246
Log:
	* cfgloopanal.c (get_loop_hot_path): New function.
	* tree-ssa-lop-ivcanon.c (struct loop_size): Add CONSTANT_IV,
	NUM_NON_PURE_CALLS_ON_HOT_PATH, NUM_PURE_CALLS_ON_HOT_PATH,
	NUM_BRANCHES_ON_HOT_PATH.
	(tree_estimate_loop_size): Compute the new values.
	(try_unroll_loop_completely): Disable unrolling of loops with only
	calls or too many branches.
	(tree_unroll_loops_completely): Deal also with outer loops of hot loops.
	* cfgloop.h (get_loop_hot_path): Declare.
	* params.def (PARAM_MAX_PEEL_BRANCHES): New parameters.
	* invoke.texi (max-peel-branches): Document.

	* gcc.dg/tree-ssa/loop-1.c: Make to look like a good unroling candidate still.
	* gcc.dg/tree-ssa/loop-23.c: Likewise.
	* gcc.dg/tree-ssa/cunroll-1.c: Unrolling now happens early.
	* gcc.dg/tree-prof/unroll-1.c: Remove confused dg-options.

Modified:
    trunk/gcc/cfgloop.h
    trunk/gcc/cfgloopanal.c
    trunk/gcc/doc/invoke.texi
    trunk/gcc/params.def
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/gcc.dg/tree-prof/unroll-1.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/cunroll-1.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/loop-1.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/loop-23.c
    trunk/gcc/tree-ssa-loop-ivcanon.c