diff options
Diffstat (limited to 'gcc/sbitmap.c')
| -rw-r--r-- | gcc/sbitmap.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/gcc/sbitmap.c b/gcc/sbitmap.c index 3cec45d..1d27a87 100644 --- a/gcc/sbitmap.c +++ b/gcc/sbitmap.c @@ -250,9 +250,16 @@ sbitmap_not (sbitmap dst, sbitmap src) unsigned int i, n = dst->size; sbitmap_ptr dstp = dst->elms; sbitmap_ptr srcp = src->elms; + unsigned int last_bit; for (i = 0; i < n; i++) *dstp++ = ~*srcp++; + + /* Zero all bits past n_bits, by ANDing dst with sbitmap_ones. */ + last_bit = src->n_bits % SBITMAP_ELT_BITS; + if (last_bit) + dst->elms[n-1] = dst->elms[n-1] + & ((SBITMAP_ELT_TYPE)-1 >> (SBITMAP_ELT_BITS - last_bit)); } /* Set the bits in DST to be the difference between the bits @@ -298,7 +305,7 @@ sbitmap_a_and_b_cg (sbitmap dst, sbitmap a, sbitmap b) for (i = 0; i < n; i++) { SBITMAP_ELT_TYPE tmp = *ap++ & *bp++; - changed = *dstp ^ tmp; + changed |= *dstp ^ tmp; *dstp++ = tmp; } @@ -332,7 +339,7 @@ sbitmap_a_xor_b_cg (sbitmap dst, sbitmap a, sbitmap b) for (i = 0; i < n; i++) { SBITMAP_ELT_TYPE tmp = *ap++ ^ *bp++; - changed = *dstp ^ tmp; + changed |= *dstp ^ tmp; *dstp++ = tmp; } @@ -366,7 +373,7 @@ sbitmap_a_or_b_cg (sbitmap dst, sbitmap a, sbitmap b) for (i = 0; i < n; i++) { SBITMAP_ELT_TYPE tmp = *ap++ | *bp++; - changed = *dstp ^ tmp; + changed |= *dstp ^ tmp; *dstp++ = tmp; } |