Thu Nov 25 09:23:56 PST 2010 simo...@microsoft.com
* Substitution should just substitute, not optimise
This was causing Trac #4524, by optimising
(e |> co) to e
on the LHS of a rule. Result, the template variable
'co' wasn't bound any more.
Now that substition doesn't optimise, it seems sensible to call
simpleOptExpr rather than substExpr when substituting in the
RHS of rules. Not a big deal either way.
M ./compiler/coreSyn/CoreSubst.lhs -10 +14
View patch online:
http://darcs.haskell.org/cgi-bin/darcsweb.cgi?r=ghc;a=darcs_commitdiff;h=20101125172356-1287e-d20ef8950d463fc72ad34ff3de43f986e2e38d4c.gz
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