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cf65f7210c
Also Revert "[LoopVectorize] Fix non-debug builds after rL374017" This reverts commit 9f41deccc0e648a006c9f38e11919f181b6c7e0a. This reverts commit 18b6fe07bcf44294f200bd2b526cb737ed275c04. The patch is breaking PowerPC internal build, checked with author, reverting on behalf of him for now due to timezone. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@374091 91177308-0d34-0410-b5e6-96231b3b80d8
83 lines
2.8 KiB
C++
83 lines
2.8 KiB
C++
//===-- WebAssemblyTargetTransformInfo.cpp - WebAssembly-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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///
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/// \file
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/// This file defines the WebAssembly-specific TargetTransformInfo
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/// implementation.
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///
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//===----------------------------------------------------------------------===//
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#include "WebAssemblyTargetTransformInfo.h"
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#include "llvm/CodeGen/CostTable.h"
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#include "llvm/Support/Debug.h"
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using namespace llvm;
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#define DEBUG_TYPE "wasmtti"
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TargetTransformInfo::PopcntSupportKind
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WebAssemblyTTIImpl::getPopcntSupport(unsigned TyWidth) const {
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assert(isPowerOf2_32(TyWidth) && "Ty width must be power of 2");
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return TargetTransformInfo::PSK_FastHardware;
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}
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unsigned WebAssemblyTTIImpl::getNumberOfRegisters(bool Vector) {
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unsigned Result = BaseT::getNumberOfRegisters(Vector);
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// For SIMD, use at least 16 registers, as a rough guess.
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if (Vector)
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Result = std::max(Result, 16u);
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return Result;
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}
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unsigned WebAssemblyTTIImpl::getRegisterBitWidth(bool Vector) const {
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if (Vector && getST()->hasSIMD128())
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return 128;
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return 64;
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}
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unsigned WebAssemblyTTIImpl::getArithmeticInstrCost(
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unsigned Opcode, Type *Ty, TTI::OperandValueKind Opd1Info,
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TTI::OperandValueKind Opd2Info, TTI::OperandValueProperties Opd1PropInfo,
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TTI::OperandValueProperties Opd2PropInfo, ArrayRef<const Value *> Args) {
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unsigned Cost = BasicTTIImplBase<WebAssemblyTTIImpl>::getArithmeticInstrCost(
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Opcode, Ty, Opd1Info, Opd2Info, Opd1PropInfo, Opd2PropInfo);
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if (auto *VTy = dyn_cast<VectorType>(Ty)) {
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switch (Opcode) {
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case Instruction::LShr:
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case Instruction::AShr:
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case Instruction::Shl:
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// SIMD128's shifts currently only accept a scalar shift count. For each
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// element, we'll need to extract, op, insert. The following is a rough
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// approxmation.
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if (Opd2Info != TTI::OK_UniformValue &&
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Opd2Info != TTI::OK_UniformConstantValue)
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Cost = VTy->getNumElements() *
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(TargetTransformInfo::TCC_Basic +
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getArithmeticInstrCost(Opcode, VTy->getElementType()) +
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TargetTransformInfo::TCC_Basic);
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break;
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}
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}
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return Cost;
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}
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unsigned WebAssemblyTTIImpl::getVectorInstrCost(unsigned Opcode, Type *Val,
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unsigned Index) {
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unsigned Cost = BasicTTIImplBase::getVectorInstrCost(Opcode, Val, Index);
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// SIMD128's insert/extract currently only take constant indices.
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if (Index == -1u)
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return Cost + 25 * TargetTransformInfo::TCC_Expensive;
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return Cost;
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}
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