fcff4582f0
With enough codegen complete, we can now correctly report the size of vector registers for LSX/LASX, allowing auto vectorization (The `auto-vec` feature needs to be enabled simultaneously). As described, the `auto-vec` feature is an experimental one. To ensure that automatic vectorization is not enabled by default, because the information provided by the current `TTI` cannot yield additional benefits for automatic vectorization.
41 lines
1.5 KiB
C++
41 lines
1.5 KiB
C++
//===-- LoongArchTargetTransformInfo.cpp - LoongArch specific TTI ---------===//
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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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/// \file
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/// This file implements a TargetTransformInfo analysis pass specific to the
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/// LoongArch target machine. It uses the target's detailed information to
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/// provide more precise answers to certain TTI queries, while letting the
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/// target independent and default TTI implementations handle the rest.
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///
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//===----------------------------------------------------------------------===//
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#include "LoongArchTargetTransformInfo.h"
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using namespace llvm;
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#define DEBUG_TYPE "loongarchtti"
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TypeSize LoongArchTTIImpl::getRegisterBitWidth(
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TargetTransformInfo::RegisterKind K) const {
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switch (K) {
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case TargetTransformInfo::RGK_Scalar:
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return TypeSize::getFixed(ST->is64Bit() ? 64 : 32);
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case TargetTransformInfo::RGK_FixedWidthVector:
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if (ST->hasExtLASX() && ST->hasExpAutoVec())
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return TypeSize::getFixed(256);
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if (ST->hasExtLSX() && ST->hasExpAutoVec())
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return TypeSize::getFixed(128);
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return TypeSize::getFixed(0);
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case TargetTransformInfo::RGK_ScalableVector:
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return TypeSize::getScalable(0);
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}
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llvm_unreachable("Unsupported register kind");
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}
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// TODO: Implement more hooks to provide TTI machinery for LoongArch.
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