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Author SHA1 Message Date
Richard Osborne d6e85018c5 [XCore] Add dag combines for instructions that ignore some input bits. 
These instructions ignore the high bits of one of their input operands -
try and use this to simplify the code.

llvm-svn: 202394
 2014-02-27 13:20:11 +00:00
Richard Osborne 2d3a2bee41 [XCore] Provide information about known zero bits of resource instructions. 
llvm-svn: 202393
 2014-02-27 13:20:06 +00:00