[RISCV] Support experimental v extensions.
authorHsiangkai Wang <kai.wang@sifive.com>
Thu, 4 Jun 2020 19:11:52 +0000 (03:11 +0800)
committerHsiangkai Wang <kai.wang@sifive.com>
Sat, 27 Jun 2020 16:54:07 +0000 (00:54 +0800)
commitd698ff92a59c0632aa6a88b72890eb401bd64faa
treebaf8b43fb203141576adc683596f44ec8963a304
parent66da87dcbaf91fa3393ce80c687e9c2d133ee3ca
[RISCV] Support experimental v extensions.

This follows the design as discussed on the mailing lists in the
following RFC:
http://lists.llvm.org/pipermail/llvm-dev/2020-January/138364.html

Support for the vector 'v' extension v0.8.

Differential revision: https://reviews.llvm.org/D81188
clang/lib/Driver/ToolChains/Arch/RISCV.cpp
clang/test/Driver/riscv-arch.c