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Commit Graph

Author	SHA1	Message	Date
Stanislav Mekhanoshin	a45584bebe	Fold fneg and fabs like multiplications Given no NaNs and no signed zeroes it folds: (fmul X, (select (fcmp X > 0.0), -1.0, 1.0)) -> (fneg (fabs X)) (fmul X, (select (fcmp X > 0.0), 1.0, -1.0)) -> (fabs X) Differential Revision: https://reviews.llvm.org/D34579 llvm-svn: 306592	2017-06-28 20:25:50 +00:00

Author

SHA1

Message

Date

Stanislav Mekhanoshin

a45584bebe

Fold fneg and fabs like multiplications

Given no NaNs and no signed zeroes it folds:

(fmul X, (select (fcmp X > 0.0), -1.0, 1.0)) -> (fneg (fabs X))
(fmul X, (select (fcmp X > 0.0), 1.0, -1.0)) -> (fabs X)

Differential Revision: https://reviews.llvm.org/D34579

llvm-svn: 306592

2017-06-28 20:25:50 +00:00

1 Commits