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85745f9561
Use mask and negate for legalization of i1 source type with SIGN_EXTEND_INREG. With the mask, this should be no worse than 2 shifts. The mask can be eliminated in some cases, so that should be better than 2 shifts. This change exposed some missing folds related to negation: https://reviews.llvm.org/rL284239 https://reviews.llvm.org/rL284395 There may be others, so please let me know if you see any regressions. Differential Revision: https://reviews.llvm.org/D25485 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@284611 91177308-0d34-0410-b5e6-96231b3b80d8