[PATCH] Add debug functions for REAL_VALUE_TYPE.

[Aldy Hernandez <aldyh@redhat.com>]

We currently have no way of dumping REAL_VALUE_TYPEs when debugging.

Tested on a gdb session examining the real value 10.0:

(gdb) p min
$9 = {cl = 1, decimal = 0, sign = 0, signalling = 0, canonical = 0, uexp = 4, sig = {0, 0, 11529215046068469760}}
(gdb) p debug (min)
0x0.ap+4

OK for trunk?

gcc/ChangeLog:

	* real.cc (debug): New.
---
 gcc/real.cc | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/gcc/real.cc b/gcc/real.cc
index 73bbac645d9..a31b256a47b 100644
--- a/gcc/real.cc
+++ b/gcc/real.cc
@@ -1900,6 +1900,22 @@ real_to_decimal (char *str, const REAL_VALUE_TYPE *r_orig, size_t buf_size,
 			    digits, crop_trailing_zeros, VOIDmode);
 }
 
+DEBUG_FUNCTION void
+debug (const REAL_VALUE_TYPE *r)
+{
+  char s[60];
+  real_to_hexadecimal (s, r, sizeof (s), 0, 1);
+  fprintf (stderr, "%s\n", s);
+}
+
+DEBUG_FUNCTION void
+debug (const REAL_VALUE_TYPE &r)
+{
+  char s[60];
+  real_to_hexadecimal (s, &r, sizeof (s), 0, 1);
+  fprintf (stderr, "%s\n", s);
+}
+
 /* Render R as a hexadecimal floating point constant.  Emit DIGITS
    significant digits in the result, bounded by BUF_SIZE.  If DIGITS is 0,
    choose the maximum for the representation.  If CROP_TRAILING_ZEROS,
-- 
2.37.1