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-rw-r--r--llvm/lib/CodeGen/LowLevelTypeUtils.cpp85
1 files changed, 85 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/LowLevelTypeUtils.cpp b/llvm/lib/CodeGen/LowLevelTypeUtils.cpp
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index 000000000000..bc2ea3f05b6d
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+++ b/llvm/lib/CodeGen/LowLevelTypeUtils.cpp
@@ -0,0 +1,85 @@
+//===-- llvm/CodeGen/LowLevelTypeUtils.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/LowLevelTypeUtils.h"
+#include "llvm/ADT/APFloat.h"
+#include "llvm/IR/DataLayout.h"
+#include "llvm/IR/DerivedTypes.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() && !Ty.isScalableTargetExtTy()) {
+ // 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());
+}
+
+EVT llvm::getApproximateEVTForLLT(LLT Ty, const DataLayout &DL,
+ LLVMContext &Ctx) {
+ if (Ty.isVector()) {
+ EVT EltVT = getApproximateEVTForLLT(Ty.getElementType(), DL, Ctx);
+ return EVT::getVectorVT(Ctx, EltVT, Ty.getElementCount());
+ }
+
+ return EVT::getIntegerVT(Ctx, Ty.getSizeInBits());
+}
+
+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.");
+}