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Author SHA1 Message Date
Zhaoshi Zheng 05b46dc300 [Thumb1] Any imm8 should have cost of 1 
A simple MOVS rd, imm8 can materialize [-128, 127] in signed i8 type or
[0, 255] in unsigned i8 type on Thumb1.

Differential Revision: https://reviews.llvm.org/D52257

llvm-svn: 342898
 2018-09-24 16:15:23 +00:00