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
5.153241959769104e13Ben, 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 |
Edited by benl