genrecog: Address -Wsign-compare diagnostics.

    g++-4.6 [...] [...]/gcc/genrecog.c
    [...]/gcc/genrecog.c: In function 'state_size find_subroutines(routine_type, state*, vec<state*>&)':
    [...]/gcc/genrecog.c:3338:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    [...]/gcc/genrecog.c:3347:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    [...]/gcc/genrecog.c:3359:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    [...]/gcc/genrecog.c:3365:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]

    3305   state_size size;
         [...]
    3337           state_size to_size = find_subroutines (type, trans->to, procs);
    3338           if (d->next && to_size.depth > MAX_DEPTH)
         [...]
    3347               if (to_size.num_statements < MIN_NUM_STATEMENTS)
         [...]
    3359   if (size.num_statements > MAX_NUM_STATEMENTS)
         [...]
    3365              && size.num_statements > MAX_NUM_STATEMENTS)

     175 static const int MAX_DEPTH = 6;
         [...]
     179 static const int MIN_NUM_STATEMENTS = 5;
         [...]
     185 static const int MAX_NUM_STATEMENTS = 200;
         [...]
    3258 struct state_size
    3259 {
         [...]
    3261   unsigned int num_statements;
         [...]
    3265   unsigned int depth;
    3266 };

	gcc/
	* genrecog.c (MAX_DEPTH, MIN_NUM_STATEMENTS, MAX_NUM_STATEMENTS):
	Change to unsigned int.

From-SVN: r223469

gcc/ChangeLog

+2015-05-21  Thomas Schwinge  <thomas@codesourcery.com>
+
+	* genrecog.c (MAX_DEPTH, MIN_NUM_STATEMENTS, MAX_NUM_STATEMENTS):
+	Change to unsigned int.
+
 2015-05-20  Mikhail Maltsev  <maltsevm@gmail.com>
 
 	* bb-reorder.c (set_edge_can_fallthru_flag): Use rtx_jump_insn where

gcc/genrecog.c

@@ -172,17 +172,17 @@ static const bool force_unique_params_p = true;
 /* The maximum (approximate) depth of block nesting that an individual
    routine or subroutine should have.  This limit is about keeping the
    output readable rather than reducing compile time.  */
-static const int MAX_DEPTH = 6;
+static const unsigned int MAX_DEPTH = 6;
 
 /* The minimum number of pseudo-statements that a state must have before
    we split it out into a subroutine.  */
-static const int MIN_NUM_STATEMENTS = 5;
+static const unsigned int MIN_NUM_STATEMENTS = 5;
 
 /* The number of pseudo-statements a state can have before we consider
    splitting out substates into subroutines.  This limit is about avoiding
    compile-time problems with very big functions (and also about keeping
    functions within --param optimization limits, etc.).  */
-static const int MAX_NUM_STATEMENTS = 200;
+static const unsigned int MAX_NUM_STATEMENTS = 200;
 
 /* The minimum number of pseudo-statements that can be used in a pattern
    routine.  */