More gcc/loop-unswitch.c cleanup.

	gcc/
	* cfgloop.h (unswitch_loops): Remove.
	* doc/passes.texi: Remove references to loop-unswitch.c
	* timevar.def (TV_LOOP_UNSWITCH): Remove.

From-SVN: r210156

gcc/ChangeLog

+2014-05-07  Thomas Schwinge  <thomas@codesourcery.com>
+
+	* cfgloop.h (unswitch_loops): Remove.
+	* doc/passes.texi: Remove references to loop-unswitch.c
+	* timevar.def (TV_LOOP_UNSWITCH): Remove.
+
 2014-05-07  Evgeny Stupachenko  <evstupac@gmail.com>
 
 	* tree-vect-data-refs.c (vect_grouped_load_supported): New

gcc/cfgloop.h

@@ -711,8 +711,6 @@ extern void loop_optimizer_init (unsigned);
 extern void loop_optimizer_finalize (void);
 
 /* Optimization passes.  */
-extern void unswitch_loops (void);
-
 enum
 {
   UAP_PEEL = 1,		/* Enables loop peeling.  */

gcc/doc/passes.texi

@@ -474,10 +474,7 @@ merging and induction variable elimination.  The pass is implemented in
 Loop unswitching.  This pass moves the conditional jumps that are invariant
 out of the loops.  To achieve this, a duplicate of the loop is created for
 each possible outcome of conditional jump(s).  The pass is implemented in
-@file{tree-ssa-loop-unswitch.c}.  This pass should eventually replace the
-RTL level loop unswitching in @file{loop-unswitch.c}, but currently
-the RTL level pass is not completely redundant yet due to deficiencies
-in tree level alias analysis.
+@file{tree-ssa-loop-unswitch.c}.
 
 The optimizations also use various utility functions contained in
 @file{tree-ssa-loop-manip.c}, @file{cfgloop.c}, @file{cfgloopanal.c} and
@@ -793,8 +790,8 @@ The source files @file{cfgloopanal.c} and @file{cfgloopmanip.c} contain
 generic loop analysis and manipulation code.  Initialization and finalization
 of loop structures is handled by @file{loop-init.c}.
 A loop invariant motion pass is implemented in @file{loop-invariant.c}.
-Basic block level optimizations---unrolling, peeling and unswitching loops---
-are implemented in @file{loop-unswitch.c} and @file{loop-unroll.c}.
+Basic block level optimizations---unrolling, and peeling loops---
+are implemented in @file{loop-unroll.c}.
 Replacing of the exit condition of loops by special machine-dependent
 instructions is handled by @file{loop-doloop.c}.
 

gcc/timevar.def

@@ -207,7 +207,6 @@ DEFTIMEVAR (TV_DSE2                  , "dead store elim2")
 DEFTIMEVAR (TV_LOOP                  , "loop analysis")
 DEFTIMEVAR (TV_LOOP_INIT	     , "loop init")
 DEFTIMEVAR (TV_LOOP_MOVE_INVARIANTS  , "loop invariant motion")
-DEFTIMEVAR (TV_LOOP_UNSWITCH         , "loop unswitching")
 DEFTIMEVAR (TV_LOOP_UNROLL           , "loop unrolling")
 DEFTIMEVAR (TV_LOOP_DOLOOP           , "loop doloop")
 DEFTIMEVAR (TV_LOOP_FINI	     , "loop fini")