+optLevelFlags :: [([Int], DynFlag)]
+optLevelFlags
+ = [ ([0], Opt_IgnoreInterfacePragmas)
+ , ([0], Opt_OmitInterfacePragmas)
+
+ , ([1,2], Opt_IgnoreAsserts)
+ , ([1,2], Opt_RewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
+ -- in PrelRules
+ , ([1,2], Opt_DoEtaReduction)
+ , ([1,2], Opt_CaseMerge)
+ , ([1,2], Opt_Strictness)
+ , ([1,2], Opt_CSE)
+ , ([1,2], Opt_FullLaziness)
+
+ , ([2], Opt_LiberateCase)
+ , ([2], Opt_SpecConstr)
+
+ , ([0,1,2], Opt_DoLambdaEtaExpansion)
+ -- This one is important for a tiresome reason:
+ -- we want to make sure that the bindings for data
+ -- constructors are eta-expanded. This is probably
+ -- a good thing anyway, but it seems fragile.