re PR middle-end/19983 (__builtin_nan should allow 0X as well as 0x)

	PR middle-end/19983
	* real.c (real_nan): Allow both 0x and 0X as hexadecimal prefixes.

	* gcc.c-torture/execute/ieee/builtin-nan-1.c: New test case.

From-SVN: r111470

1 files changed, 6 insertions, 2 deletions

diff --git a/gcc/real.c b/gcc/real.c
index 5d5b12f..c4b6479 100644
--- a/gcc/real.c
+++ b/gcc/real.c
@@ -2193,8 +2193,12 @@ real_nan (REAL_VALUE_TYPE *r, const char *str, int quiet,
 	str++;
       if (*str == '0')
 	{
-	  if (*++str == 'x')
-	    str++, base = 16;
+	  str++;
+	  if (*str == 'x' || *str == 'X')
+	    {
+	      base = 16;
+	      str++;
+	    }
 	  else
 	    base = 8;
 	}