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7db26e00 · Simon Marlow · cf3fb956 · 7db26e00
Commit 7db26e00 authored Aug 03, 2012 by Simon Marlow
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compiler/cmm/CmmOpt.hs compiler/cmm/CmmOpt.hs +5 -0

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--- a/compiler/cmm/CmmOpt.hs
+++ b/compiler/cmm/CmmOpt.hs
@@ -605,6 +605,11 @@ cmmMachOpFoldM platform mop [x, (CmmLit (CmmInt n _))]
                Just (cmmMachOpFold platform (MO_S_Shr rep) [x3, CmmLit (CmmInt p rep)])
        _ -> Nothing

+-- ToDo (#7116): optimise floating-point multiplication, e.g. x*2.0 -> x+x
+-- Unfortunately this needs a unique supply because x might not be a
+-- register.  See #2253 (program 6) for an example.
+
+
 -- Anything else is just too hard.

 cmmMachOpFoldM _ _ _ = Nothing