Bad FP code generated by x86_64 native code generator.
With this module:
main :: IO ()
main = mapM_ print $ map log2 vals
log2 :: Int -> Double
log2 x = logBase 2 (fromIntegral x)
vals :: [Int]
vals = [1, 2, 17]
on amd64/Linux with the HEAD, I'm seeing:
$ ghc -fforce-recomp -O -fregs-graph -o num012 num012.hs; ./num012
0.0
1.2607434391239006e13
5.153241959769104e13
Ben, are you able to take a look please?
Trac metadata
Trac field | Value |
---|---|
Version | 6.11 |
Type | Bug |
TypeOfFailure | OtherFailure |
Priority | normal |
Resolution | Unresolved |
Component | Compiler (NCG) |
Test case | |
Differential revisions | |
BlockedBy | |
Related | |
Blocking | |
CC | |
Operating system | |
Architecture | Unknown/Multiple |