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Chris Lattner e34537856a add a new SimplifyInstruction API, which is like ConstantFoldInstruction, 
except that the result may not be a constant.  Switch jump threading to 
use it so that it gets things like (X & 0) -> 0, which occur when phi preds
are deleted and the remaining phi pred was a zero.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86637 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-10 01:08:51 +00:00
..
llvm add a new SimplifyInstruction API, which is like ConstantFoldInstruction, 2009-11-10 01:08:51 +00:00
llvm-c