[gcc r13-3243] Add an frange(type) constructor analogous to the irange version.

[Aldy Hernandez]

https://gcc.gnu.org/g:a901343aa314eb08b362fc6878456d12f96e49b7

commit r13-3243-ga901343aa314eb08b362fc6878456d12f96e49b7
Author: Aldy Hernandez <aldyh@redhat.com>
Date:   Tue Oct 11 17:22:40 2022 +0200

    Add an frange(type) constructor analogous to the irange version.
    
    gcc/ChangeLog:
    
            * value-range.h (frange::frange): Add constructor taking type.

Diff:
---
 gcc/value-range.h | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/gcc/value-range.h b/gcc/value-range.h
index 07a2067898c..9d630e40f78 100644
--- a/gcc/value-range.h
+++ b/gcc/value-range.h
@@ -281,6 +281,7 @@ public:
   frange ();
   frange (const frange &);
   frange (tree, tree, value_range_kind = VR_RANGE);
+  frange (tree type);
   frange (tree type, const REAL_VALUE_TYPE &min, const REAL_VALUE_TYPE &max,
 	  value_range_kind = VR_RANGE);
   static bool supports_p (const_tree type)
@@ -1059,6 +1060,13 @@ frange::frange (const frange &src)
   *this = src;
 }
 
+inline
+frange::frange (tree type)
+{
+  m_discriminator = VR_FRANGE;
+  set_varying (type);
+}
+
 // frange constructor from REAL_VALUE_TYPE endpoints.
 
 inline