Duncan Sands 44c273d907 Move some shift transforms out of instcombine and into InstructionSimplify. ... While there, I noticed that the transform "undef >>a X -> undef" was wrong. For example if X is 2 then the top two bits must be equal, so the result can not be anything. I fixed this in the constant folder as well. Also, I made the transform for "X << undef" stronger: it now folds to undef always, even though X might be zero. This is in accordance with the LangRef, but I must admit that it is fairly aggressive. Also, I added "i32 X << 32 -> undef" following the LangRef and the constant folder, likewise fairly aggressive. llvm-svn: 123417		2011-01-14 00:37:45 +00:00
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llvm	Move some shift transforms out of instcombine and into InstructionSimplify.	2011-01-14 00:37:45 +00:00
llvm-c	Do not include DataTypes.h in llvm-c/lto.h.	2011-01-07 22:26:25 +00:00