[COMMITTED] Return non-legacy ranges in range.h.

[Aldy Hernandez <aldyh@redhat.com>]

int_range<1> is a legacy range (think anti ranges, legacy VRP, etc).
There is a penalty for converting anything built with <1> to
non-legacy.  Since most of the uses of these functions are now ranger,
we can save a miniscule amount of time by converting them to
non-legacy.

gcc/ChangeLog:

	* range.h (range_true): Return int_range<2>.
	(range_false): Same.
	(range_true_and_false): Same.
---
 gcc/range.h | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/gcc/range.h b/gcc/range.h
index 5c70c66566c..8138d6f5515 100644
--- a/gcc/range.h
+++ b/gcc/range.h
@@ -32,7 +32,7 @@ static inline int_range<1>
 range_true (tree type)
 {
   unsigned prec = TYPE_PRECISION (type);
-  return int_range<1> (type, wi::one (prec), wi::one (prec));
+  return int_range<2> (type, wi::one (prec), wi::one (prec));
 }
 
 // Return an irange instance that is a boolean FALSE.
@@ -41,7 +41,7 @@ static inline int_range<1>
 range_false (tree type)
 {
   unsigned prec = TYPE_PRECISION (type);
-  return int_range<1> (type, wi::zero (prec), wi::zero (prec));
+  return int_range<2> (type, wi::zero (prec), wi::zero (prec));
 }
 
 // Return an irange that covers both true and false.
@@ -50,7 +50,7 @@ static inline int_range<1>
 range_true_and_false (tree type)
 {
   unsigned prec = TYPE_PRECISION (type);
-  return int_range<1> (type, wi::zero (prec), wi::one (prec));
+  return int_range<2> (type, wi::zero (prec), wi::one (prec));
 }
 
 #endif // GCC_RANGE_H
-- 
2.37.3