| 1 | //===-- LoongArchTargetTransformInfo.cpp - LoongArch specific TTI ---------===// |
|---|---|
| 2 | // |
| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| 4 | // See https://llvm.org/LICENSE.txt for license information. |
| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| 6 | // |
| 7 | //===----------------------------------------------------------------------===// |
| 8 | /// \file |
| 9 | /// This file implements a TargetTransformInfo analysis pass specific to the |
| 10 | /// LoongArch target machine. It uses the target's detailed information to |
| 11 | /// provide more precise answers to certain TTI queries, while letting the |
| 12 | /// target independent and default TTI implementations handle the rest. |
| 13 | /// |
| 14 | //===----------------------------------------------------------------------===// |
| 15 | |
| 16 | #include "LoongArchTargetTransformInfo.h" |
| 17 | |
| 18 | using namespace llvm; |
| 19 | |
| 20 | #define DEBUG_TYPE "loongarchtti" |
| 21 | |
| 22 | TypeSize LoongArchTTIImpl::getRegisterBitWidth( |
| 23 | TargetTransformInfo::RegisterKind K) const { |
| 24 | TypeSize DefSize = TargetTransformInfoImplBase::getRegisterBitWidth(K); |
| 25 | switch (K) { |
| 26 | case TargetTransformInfo::RGK_Scalar: |
| 27 | return TypeSize::getFixed(ExactSize: ST->is64Bit() ? 64 : 32); |
| 28 | case TargetTransformInfo::RGK_FixedWidthVector: |
| 29 | if (!ST->hasExpAutoVec()) |
| 30 | return DefSize; |
| 31 | if (ST->hasExtLASX()) |
| 32 | return TypeSize::getFixed(ExactSize: 256); |
| 33 | if (ST->hasExtLSX()) |
| 34 | return TypeSize::getFixed(ExactSize: 128); |
| 35 | [[fallthrough]]; |
| 36 | case TargetTransformInfo::RGK_ScalableVector: |
| 37 | return DefSize; |
| 38 | } |
| 39 | |
| 40 | llvm_unreachable("Unsupported register kind"); |
| 41 | } |
| 42 | |
| 43 | unsigned LoongArchTTIImpl::getNumberOfRegisters(unsigned ClassID) const { |
| 44 | switch (ClassID) { |
| 45 | case LoongArchRegisterClass::GPRRC: |
| 46 | // 30 = 32 GPRs - r0 (zero register) - r21 (non-allocatable) |
| 47 | return 30; |
| 48 | case LoongArchRegisterClass::FPRRC: |
| 49 | return ST->hasBasicF() ? 32 : 0; |
| 50 | case LoongArchRegisterClass::VRRC: |
| 51 | return ST->hasExtLSX() ? 32 : 0; |
| 52 | } |
| 53 | llvm_unreachable("unknown register class"); |
| 54 | } |
| 55 | |
| 56 | unsigned LoongArchTTIImpl::getRegisterClassForType(bool Vector, |
| 57 | Type *Ty) const { |
| 58 | if (Vector) |
| 59 | return LoongArchRegisterClass::VRRC; |
| 60 | if (!Ty) |
| 61 | return LoongArchRegisterClass::GPRRC; |
| 62 | |
| 63 | Type *ScalarTy = Ty->getScalarType(); |
| 64 | if ((ScalarTy->isFloatTy() && ST->hasBasicF()) || |
| 65 | (ScalarTy->isDoubleTy() && ST->hasBasicD())) { |
| 66 | return LoongArchRegisterClass::FPRRC; |
| 67 | } |
| 68 | |
| 69 | return LoongArchRegisterClass::GPRRC; |
| 70 | } |
| 71 | |
| 72 | const char *LoongArchTTIImpl::getRegisterClassName(unsigned ClassID) const { |
| 73 | switch (ClassID) { |
| 74 | case LoongArchRegisterClass::GPRRC: |
| 75 | return "LoongArch::GPRRC"; |
| 76 | case LoongArchRegisterClass::FPRRC: |
| 77 | return "LoongArch::FPRRC"; |
| 78 | case LoongArchRegisterClass::VRRC: |
| 79 | return "LoongArch::VRRC"; |
| 80 | } |
| 81 | llvm_unreachable("unknown register class"); |
| 82 | } |
| 83 | |
| 84 | // TODO: Implement more hooks to provide TTI machinery for LoongArch. |
| 85 |