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3 Commits

Author SHA1 Message Date
Simon Pilgrim 6be48e4aa7 [X86] Improve 64-bit shifts on 32-bit targets (PR14593) 
As discussed on PR14593, this patch adds support for lowering to SHLD/SHRD from the patterns generated by DAGTypeLegalizer::ExpandShiftWithKnownAmountBit.

Differential Revision: https://reviews.llvm.org/D23000

llvm-svn: 277299
 2016-07-31 19:50:45 +00:00
Simon Pilgrim 64845bb8b4 [X86] Add tests for the lowering SHLD/SHRD from manual pattern similar to those generated by ExpandShiftWithKnownAmountBit 
Test for add(v,v) as well as shl(v,1)

llvm-svn: 277293
 2016-07-31 17:51:37 +00:00
Simon Pilgrim 1e096b3a7a [X86] Add tests for the lowering SHLD/SHRD from manual patterns 
As discussed on D23000

llvm-svn: 277291
 2016-07-31 17:11:49 +00:00