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| author | Fraser Cormack <fraser@codeplay.com> | 2021-02-18 12:48:14 +0000 |
|---|---|---|
| committer | Fraser Cormack <fraser@codeplay.com> | 2021-02-20 15:43:54 +0000 |
| commit | 3e1317fd323bf92c6adaf67598697049b08bb373 (patch) | |
| tree | c45666fffdf1fe69e126ab50f4cd047e192dfc39 /llvm/lib/Transforms/Utils/ModuleUtils.cpp | |
| parent | 9aa20caee6b47ac601602c674749fb6c1d2179cf (diff) | |
| download | llvm-3e1317fd323bf92c6adaf67598697049b08bb373.zip llvm-3e1317fd323bf92c6adaf67598697049b08bb373.tar.gz llvm-3e1317fd323bf92c6adaf67598697049b08bb373.tar.bz2 | |
[RISCV] Support extraction of misaligned subvectors
This patch extends the support for RVV EXTRACT_SUBVECTOR to cover those
which don't align to a vector register boundary. It accomplishes this by
extracting the nearest register-sized subvector (a subregister
operation), then sliding the vector down with VSLIDEDOWN and extracting
the subvector from the first position (a COPY operation).
Since this procedure involves the use of VSCALE and multiplication, the
handling of such operations is done during lowering to simplify the
implementation and make use of DAG combining. This necessitated moving
some helper functions from RISCVISelDAGToDAG to RISCVTargetLowering.
Reviewed By: craig.topper
Differential Revision: https://reviews.llvm.org/D96959
Diffstat (limited to 'llvm/lib/Transforms/Utils/ModuleUtils.cpp')
0 files changed, 0 insertions, 0 deletions