Creating a bit mask using '(1 << n) - 1' is undefined if
n is as big as the width of an int.
Use the safe helper bits_mask() to create the mask/value
for predefined_max().
Note: predefined_max() is currently correct only for signed types.
Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@xxxxxxxxx>
---
lib.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/lib.c b/lib.c
index 70c5c72bb..8cd2a837f 100644
--- a/lib.c
+++ b/lib.c
@@ -46,6 +46,7 @@
#include "target.h"
#include "machine.h"
#include "version.h"
+#include "bits.h"
int verbose, optimize_level, optimize_size, preprocessing;
int die_if_error = 0;
@@ -1142,7 +1143,7 @@ static void predefined_width(const char *name, unsigned bits)
static void predefined_max(const char *name, const char *suffix, unsigned bits)
{
- unsigned long long max = (1ULL << (bits - 1 )) - 1;
+ unsigned long long max = bits_mask(bits - 1);
char buf[32];
snprintf(buf, sizeof(buf), "__%s_MAX__", name);
--
2.19.2
