More MSVC warning fixes:

1. DUPMAX is defined in regcomp.c, no need to redefine it in regutils.
2. MSVC doesn't like snprintf, use _snprintf instead.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81114 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Support/regcomp.c

@@ -142,6 +142,7 @@ static char nuls[10];		/* place to point scanner in event of error */
 #else
 #define	DUPMAX	255
 #endif
+#define	INFINITY	(DUPMAX + 1)
 
 #ifndef NDEBUG
 static int never = 0;		/* for use in asserts; shuts lint up */

lib/Support/regerror.c

@@ -45,6 +45,10 @@
 
 #include "regutils.h"
 
+#ifdef _MSC_VER
+#define snprintf _snprintf
+#endif
+
 static const char *regatoi(const llvm_regex_t *, char *, int);
 
 static struct rerr {

lib/Support/regutils.h

@@ -36,8 +36,6 @@
  */
 
 /* utility definitions */
-#define	DUPMAX		_POSIX2_RE_DUP_MAX	/* xxx is this right? */
-#define	INFINITY	(DUPMAX + 1)
 #define	NC		(CHAR_MAX - CHAR_MIN + 1)
 typedef unsigned char uch;