diff options
| -rw-r--r-- | compiler/cmm/CmmSwitch.hs | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/compiler/cmm/CmmSwitch.hs b/compiler/cmm/CmmSwitch.hs index 53d00de95a..f252cafa39 100644 --- a/compiler/cmm/CmmSwitch.hs +++ b/compiler/cmm/CmmSwitch.hs @@ -66,9 +66,9 @@ maxJumpTableHole = 7 -- | Minimum size of a jump table. If the number is smaller, the switch is -- implemented using conditionals. --- Currently 5, because an if-then-else tree of 4 values is nice and compact. +-- Currently 3, because that's the heuristic GCC and clang seem to use minJumpTableSize :: Int -minJumpTableSize = 5 +minJumpTableSize = 3 -- | Minimum non-zero offset for a jump table. See Note [Jump Table Offset]. minJumpTableOffset :: Integer @@ -302,7 +302,7 @@ splitAtHoles holeSize m = map (\range -> restrictMap range m) nonHoles -- (into singleton maps, for now). breakTooSmall :: M.Map Integer a -> [M.Map Integer a] breakTooSmall m - | M.size m > minJumpTableSize = [m] + | M.size m >= minJumpTableSize = [m] | otherwise = [M.singleton k v | (k,v) <- M.toList m] --- |