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Author SHA1 Message Date
James Molloy 65b6be1d3a [Thumb] Fix off-by-one error in r272007 
We can only generate immediates up to #510 with a MOV+ADD, not #511, because there's no such instruction as add #256.

Found by Oliver Stannard and csmith!

llvm-svn: 272665
 2016-06-14 13:33:07 +00:00
James Molloy b101383fb5 [Thumb-1] Add optimized constant materialization for integers [256..512) 
We can materialize these integers using a MOV; ADDi8 pair.

llvm-svn: 272007
 2016-06-07 13:10:14 +00:00