Implement Newton-Rhapson method for improving estimate instructions to the
correct accuracy, and implementing divide as multiply by reciprocal when it has
-more than one use. Itanium will want this too.
+more than one use. Itanium would want this too.
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+Darwin Stub removal:
+
+We still generate calls to foo$stub, and stubs, on Darwin. This is not
+necessary when building with the Leopard (10.5) or later linker, as stubs are
+generated by ld when necessary. Parameterizing this based on the deployment
+target (-mmacosx-version-min) is probably enough. x86-32 does this right, see
+its logic.
+
+===-------------------------------------------------------------------------===
+
Darwin Stub LICM optimization:
Loops like this: