[PATCH] D155824: [LoongArch] Support -march=native and -mtune=
Lu Weining via Phabricator via cfe-commits
cfe-commits at lists.llvm.org
Thu Jul 20 05:36:25 PDT 2023
SixWeining created this revision.
SixWeining added reviewers: xen0n, xry111, hev, wangleiat.
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As described in [1][2], `-mtune=` is used to select the type of target
microarchitecture, defaults to the value of `-march`. The set of
possible values should be a superset of `-march` values. Currently
possible values of `-march=` and `-mtune=` are `native`, `loongarch64`
and `la464`.
D136146 <https://reviews.llvm.org/D136146> has supported `-march={loongarch64,la464}` and this patch adds
support for `-march=native` and `-mtune=`.
A new ProcessorModel called `loongarch64` is defined in LoongArch.td
to support `-mtune=loongarch64`.
`llvm::sys::getHostCPUName()` returns `generic` on unknown or future
LoongArch CPUs, e.g. the not yet added `la664`, leading to
`llvm::LoongArch::isValidArchName()` failing to parse the arch name.
In this case, use `loongarch64` as the default arch name for 64-bit
CPUs.
And these two preprocessor macros are defined:
- __loongarch_arch
- __loongarch_tune
[1]: https://github.com/loongson/LoongArch-Documentation/blob/2023.04.20/docs/LoongArch-toolchain-conventions-EN.adoc
[2]: https://github.com/loongson/la-softdev-convention/blob/v0.1/la-softdev-convention.adoc
Repository:
rG LLVM Github Monorepo
https://reviews.llvm.org/D155824
Files:
clang/lib/Basic/Targets/LoongArch.cpp
clang/lib/Basic/Targets/LoongArch.h
clang/lib/Driver/ToolChains/Arch/LoongArch.cpp
clang/lib/Driver/ToolChains/Clang.cpp
clang/test/Driver/loongarch-mtune-error.c
clang/test/Driver/loongarch-mtune.c
clang/test/Preprocessor/init-loongarch.c
llvm/include/llvm/TargetParser/LoongArchTargetParser.h
llvm/lib/Target/LoongArch/LoongArch.td
llvm/lib/TargetParser/LoongArchTargetParser.cpp
llvm/test/CodeGen/LoongArch/cpus-invalid.ll
llvm/test/CodeGen/LoongArch/cpus.ll
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