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Author SHA1 Message Date
Roman Lebedev 053014f8f9 [InstCombine] Deal with -(trunc(X >>u 63)) -> trunc(X >>s 63) 
Identical to it's trunc-less variant, just pretent-to hoist
trunc, and everything else still holds:
https://rise4fun.com/Alive/JRU

llvm-svn: 373364
 2019-10-01 17:50:20 +00:00
Roman Lebedev f273fc793a [NFC][InstCombine] (Better) tests for sign-bit-smearing pattern 
https://rise4fun.com/Alive/JRU
https://rise4fun.com/Alive/yR4 <- we can preserve 'exact'

llvm-svn: 373362
 2019-10-01 17:49:58 +00:00