39 lines
1.4 KiB
C++
39 lines
1.4 KiB
C++
//===-- llvm/CodeGen/LowLevelType.cpp -------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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/// \file This file implements the more header-heavy bits of the LLT class to
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/// avoid polluting users' namespaces.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/CodeGen/LowLevelType.h"
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#include "llvm/IR/DataLayout.h"
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#include "llvm/IR/DerivedTypes.h"
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#include "llvm/Support/raw_ostream.h"
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using namespace llvm;
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LLT llvm::getLLTForType(Type &Ty, const DataLayout &DL) {
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if (auto VTy = dyn_cast<VectorType>(&Ty)) {
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auto NumElements = VTy->getNumElements();
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LLT ScalarTy = getLLTForType(*VTy->getElementType(), DL);
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if (NumElements == 1)
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return ScalarTy;
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return LLT::vector(NumElements, ScalarTy);
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} else if (auto PTy = dyn_cast<PointerType>(&Ty)) {
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return LLT::pointer(PTy->getAddressSpace(), DL.getTypeSizeInBits(&Ty));
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} else if (Ty.isSized()) {
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// Aggregates are no different from real scalars as far as GlobalISel is
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// concerned.
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auto SizeInBits = DL.getTypeSizeInBits(&Ty);
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assert(SizeInBits != 0 && "invalid zero-sized type");
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return LLT::scalar(SizeInBits);
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}
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return LLT();
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}
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