Chris Lattner f4fb91181c change the preferred canonical form for a sign extension to be ...

lshr+ashr instead of trunc+sext.  We want to avoid type 
conversions whenever possible, it is easier to codegen expressions
without truncates and extensions.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93107 91177308-0d34-0410-b5e6-96231b3b80d8

2010-01-10 07:08:30 +00:00

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