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3 Commits

Author SHA1 Message Date
Sanjay Patel 3a3aaf67e0 [DAG] optimize negation of bool 
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

llvm-svn: 284611
 2016-10-19 16:58:59 +00:00
Sanjay Patel 24b6ef7792 [x86] add negate-i1 run for 32-bit target 
llvm-svn: 284124
 2016-10-13 14:27:08 +00:00
Sanjay Patel c2bd185dc4 [x86] add tests for negate bool 
llvm-svn: 283930
 2016-10-11 20:15:20 +00:00