diff options
Diffstat (limited to 'src/ir/bits.h')
| -rw-r--r-- | src/ir/bits.h | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/src/ir/bits.h b/src/ir/bits.h index 6b0697280..8b28bb031 100644 --- a/src/ir/bits.h +++ b/src/ir/bits.h @@ -43,9 +43,9 @@ struct Bits { if (mask == 0) { return 0; // trivially not a mask } - // otherwise, see if adding one turns this into a 1-bit thing, 00011111 + 1 - // => 00100000 - if (PopCount(mask + 1) != 1) { + // otherwise, see if x & (x + 1) turns this into non-zero value + // 00011111 & (00011111 + 1) => 0 + if (mask & (mask + 1)) { return 0; } // this is indeed a mask |