s/full\>/ful/.

[libfirm] / ir / adt / raw_bitset.h

diff --git a/ir/adt/raw_bitset.h b/ir/adt/raw_bitset.h
index e38cc51..8847ad8 100644 (file)
--- a/ir/adt/raw_bitset.h
+++ b/ir/adt/raw_bitset.h
@@ -45,7 +45,7 @@
 #include "obst.h"
 
 #define BITS_PER_ELEM                (sizeof(unsigned) * 8)
-#define BITSET_SIZE_ELEMS(size_bits) ((size_bits)/BITS_PER_ELEM + 1)
+#define BITSET_SIZE_ELEMS(size_bits) ((size_bits+BITS_PER_ELEM-1)/BITS_PER_ELEM)
 #define BITSET_SIZE_BYTES(size_bits) (BITSET_SIZE_ELEMS(size_bits) * sizeof(unsigned))
 #define BITSET_ELEM(bitset,pos)      bitset[pos / BITS_PER_ELEM]
 
@@ -197,6 +197,9 @@ static inline void rbitset_set_all(unsigned *bitset, unsigned size)
        unsigned i;
        unsigned n = BITSET_SIZE_ELEMS(size);
 
+       if (n == 0)
+               return;
+
        for (i = 0; i < n-1; ++i) {
                bitset[i] = ~0u;
        }
@@ -235,7 +238,11 @@ static inline void rbitset_clear_all(unsigned *bitset, unsigned size)
 static inline void rbitset_flip_all(unsigned *bitset, unsigned size)
 {
        unsigned pos;
-       unsigned n    = BITSET_SIZE_ELEMS(size);
+       unsigned n = BITSET_SIZE_ELEMS(size);
+
+       if (n == 0)
+               return;
+
        for (pos = 0; pos < n-1; ++pos) {
                bitset[pos] ^= ~0u;
        }