f62c9252fc
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 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.
Two preprocessor macros are defined based on user-provided `-march=`
and `-mtune=` options and the defaults.
- __loongarch_arch
- __loongarch_tune
Note that, to work with `-fno-integrated-cc1` we leverage cc1 options
`-target-cpu` and `-tune-cpu` to pass driver options `-march=` and
`-mtune=` respectively because cc1 needs these information to define
macros in `LoongArchTargetInfo::getTargetDefines`.
[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
Reviewed By: xen0n, wangleiat, steven_wu, MaskRay
Differential Revision: https://reviews.llvm.org/D155824
61 lines
1.9 KiB
C++
61 lines
1.9 KiB
C++
//===-- LoongArchTargetParser - Parser for LoongArch features --*- C++ -*-====//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements a target parser to recognise LoongArch hardware features
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// such as CPU/ARCH and extension names.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/TargetParser/LoongArchTargetParser.h"
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using namespace llvm;
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using namespace llvm::LoongArch;
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const FeatureInfo AllFeatures[] = {
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#define LOONGARCH_FEATURE(NAME, KIND) {NAME, KIND},
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#include "llvm/TargetParser/LoongArchTargetParser.def"
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};
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const ArchInfo AllArchs[] = {
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#define LOONGARCH_ARCH(NAME, KIND, FEATURES) \
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{NAME, LoongArch::ArchKind::KIND, FEATURES},
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#include "llvm/TargetParser/LoongArchTargetParser.def"
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};
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bool LoongArch::isValidArchName(StringRef Arch) {
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for (const auto A : AllArchs)
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if (A.Name == Arch)
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return true;
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return false;
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}
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bool LoongArch::getArchFeatures(StringRef Arch,
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std::vector<StringRef> &Features) {
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for (const auto A : AllArchs) {
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if (A.Name == Arch) {
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for (const auto F : AllFeatures)
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if ((A.Features & F.Kind) == F.Kind)
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Features.push_back(F.Name);
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return true;
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}
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}
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return false;
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}
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bool LoongArch::isValidCPUName(StringRef Name) { return isValidArchName(Name); }
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void LoongArch::fillValidCPUList(SmallVectorImpl<StringRef> &Values) {
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for (const auto A : AllArchs)
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Values.emplace_back(A.Name);
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}
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StringRef LoongArch::getDefaultArch(bool Is64Bit) {
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// TODO: use a real 32-bit arch name.
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return Is64Bit ? "loongarch64" : "";
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}
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