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Author SHA1 Message Date
Andrew Zhogin e54a2b399d [DAGCombiner] visitRotate patch to optimize pair of ROTR/ROTL instructions into one with combined shift operand. 
For two ROTR operations with shifts C1, C2; combined shift operand will be (C1 + C2) % bitsize.

Differential revision: https://reviews.llvm.org/D12833


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@307179 91177308-0d34-0410-b5e6-96231b3b80d8
 2017-07-05 17:55:42 +00:00
Andrew Zhogin d519d29dbb [ARM][test] Added test/CodeGen/ARM/ror.ll test. NFC precommit for D12833. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@307103 91177308-0d34-0410-b5e6-96231b3b80d8
 2017-07-04 19:50:22 +00:00