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add a note

llvm-svn: 26950
This commit is contained in:
Chris Lattner 2006-03-22 07:33:46 +00:00
parent 25440d19b1
commit 64be951e06

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@ -128,3 +128,13 @@ Can be improved in two ways:
//===---------------------------------------------------------------------===//
Add LSR exit value substitution. It'll probably be a win for Ackermann, etc.
//===---------------------------------------------------------------------===//
It would be nice to revert this patch:
http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20060213/031986.html
And teach the dag combiner enough to simplify the code expanded before
legalize. It seems plausible that this knowledge would let it simplify other
stuff too.