commit 0c6e16f1bc7efc5eec888dc009e9b3a941f3ee0c
author Fraser Cormack <fraser@codeplay.com> Thu Feb 04 12:07:59 2021 +0000
committer Copybara-Service <copybara-worker@google.com> Fri Feb 19 02:47:07 2021 -0800
tree 39339142f14a7b930ab8850a9ea8ad69f430f654
parent e43639cae9a65021306de065469692a79d54f7b4

[RISCV] Add patterns for scalable-vector fabs & fcopysign

The patterns mostly follow the scalar counterparts, save for some extra
optimizations to match the vector/scalar forms.

The patch adds a DAGCombine for ISD::FCOPYSIGN to try and reorder
ISD::FNEG around any ISD::FP_EXTEND or ISD::FP_TRUNC of the second
operand. This helps us achieve better codegen to match vfsgnjn.

Reviewed By: craig.topper

Differential Revision: https://reviews.llvm.org/D96028

GitOrigin-RevId: b8701990202cd305236401f76331d53e65953ef2