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//===-- llvm/CodeGen/LowLevelType.cpp -------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
/// \file This file implements the more header-heavy bits of the LLT class to
/// avoid polluting users' namespaces.
//
//===----------------------------------------------------------------------===//
#include "llvm/CodeGen/LowLevelType.h"
#include "llvm/ADT/APFloat.h"
#include "llvm/IR/DataLayout.h"
#include "llvm/IR/DerivedTypes.h"
#include "llvm/Support/raw_ostream.h"
using namespace llvm;
LLT llvm::getLLTForType(Type &Ty, const DataLayout &DL) {
if (auto VTy = dyn_cast<VectorType>(&Ty)) {
auto EC = VTy->getElementCount();
LLT ScalarTy = getLLTForType(*VTy->getElementType(), DL);
if (EC.isScalar())
return ScalarTy;
return LLT::vector(EC, ScalarTy);
}
if (auto PTy = dyn_cast<PointerType>(&Ty)) {
unsigned AddrSpace = PTy->getAddressSpace();
return LLT::pointer(AddrSpace, DL.getPointerSizeInBits(AddrSpace));
}
if (Ty.isSized()) {
// Aggregates are no different from real scalars as far as GlobalISel is
// concerned.
auto SizeInBits = DL.getTypeSizeInBits(&Ty);
assert(SizeInBits != 0 && "invalid zero-sized type");
return LLT::scalar(SizeInBits);
}
return LLT();
}
MVT llvm::getMVTForLLT(LLT Ty) {
if (!Ty.isVector())
return MVT::getIntegerVT(Ty.getSizeInBits());
return MVT::getVectorVT(
MVT::getIntegerVT(Ty.getElementType().getSizeInBits()),
Ty.getNumElements());
}
LLT llvm::getLLTForMVT(MVT Ty) {
if (!Ty.isVector())
return LLT::scalar(Ty.getSizeInBits());
return LLT::scalarOrVector(Ty.getVectorElementCount(),
Ty.getVectorElementType().getSizeInBits());
}
const llvm::fltSemantics &llvm::getFltSemanticForLLT(LLT Ty) {
assert(Ty.isScalar() && "Expected a scalar type.");
switch (Ty.getSizeInBits()) {
case 16:
return APFloat::IEEEhalf();
case 32:
return APFloat::IEEEsingle();
case 64:
return APFloat::IEEEdouble();
case 128:
return APFloat::IEEEquad();
}
llvm_unreachable("Invalid FP type size.");
}
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