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//===-- NVPTXUtilities - Utilities -----------------------------*- C++ -*-====//
//
// 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
//
//===----------------------------------------------------------------------===//
//
// This file contains the declaration of the NVVM specific utility functions.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_LIB_TARGET_NVPTX_NVPTXUTILITIES_H
#define LLVM_LIB_TARGET_NVPTX_NVPTXUTILITIES_H
#include "NVPTX.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/CodeGen/ValueTypes.h"
#include "llvm/IR/CallingConv.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/GlobalVariable.h"
#include "llvm/IR/IntrinsicInst.h"
#include "llvm/IR/Value.h"
#include "llvm/Support/Alignment.h"
#include "llvm/Support/FormatVariadic.h"
#include <cstdarg>
#include <set>
#include <string>
#include <vector>
namespace llvm {
class TargetMachine;
void clearAnnotationCache(const Module *);
bool isTexture(const Value &);
bool isSurface(const Value &);
bool isSampler(const Value &);
bool isImage(const Value &);
bool isImageReadOnly(const Value &);
bool isImageWriteOnly(const Value &);
bool isImageReadWrite(const Value &);
bool isManaged(const Value &);
StringRef getTextureName(const Value &);
StringRef getSurfaceName(const Value &);
StringRef getSamplerName(const Value &);
SmallVector<unsigned, 3> getMaxNTID(const Function &);
SmallVector<unsigned, 3> getReqNTID(const Function &);
SmallVector<unsigned, 3> getClusterDim(const Function &);
std::optional<uint64_t> getOverallMaxNTID(const Function &);
std::optional<uint64_t> getOverallReqNTID(const Function &);
std::optional<uint64_t> getOverallClusterRank(const Function &);
std::optional<unsigned> getMaxClusterRank(const Function &);
std::optional<unsigned> getMinCTASm(const Function &);
std::optional<unsigned> getMaxNReg(const Function &);
inline bool isKernelFunction(const Function &F) {
return F.getCallingConv() == CallingConv::PTX_Kernel;
}
bool isParamGridConstant(const Argument &);
inline MaybeAlign getAlign(const Function &F, unsigned Index) {
return F.getAttributes().getAttributes(Index).getStackAlignment();
}
MaybeAlign getAlign(const CallInst &, unsigned);
Function *getMaybeBitcastedCallee(const CallBase *CB);
// PTX ABI requires all scalar argument/return values to have
// bit-size as a power of two of at least 32 bits.
inline unsigned promoteScalarArgumentSize(unsigned size) {
if (size <= 32)
return 32;
if (size <= 64)
return 64;
return size;
}
bool shouldEmitPTXNoReturn(const Value *V, const TargetMachine &TM);
inline bool shouldPassAsArray(Type *Ty) {
return Ty->isAggregateType() || Ty->isVectorTy() ||
Ty->getScalarSizeInBits() == 128 || Ty->isHalfTy() || Ty->isBFloatTy();
}
namespace NVPTX {
// Returns a list of vector types that we prefer to fit into a single PTX
// register. NOTE: This must be kept in sync with the register classes
// defined in NVPTXRegisterInfo.td.
inline auto packed_types() {
static const auto PackedTypes = {MVT::v4i8, MVT::v2f16, MVT::v2bf16,
MVT::v2i16, MVT::v2f32};
return PackedTypes;
}
// Checks if the type VT can fit into a single register.
inline bool isPackedVectorTy(EVT VT) {
return any_of(packed_types(), [VT](EVT OVT) { return OVT == VT; });
}
// Checks if two or more of the type ET can fit into a single register.
inline bool isPackedElementTy(EVT ET) {
return any_of(packed_types(),
[ET](EVT OVT) { return OVT.getVectorElementType() == ET; });
}
inline std::string getValidPTXIdentifier(StringRef Name) {
std::string ValidName;
ValidName.reserve(Name.size() + 4);
for (char C : Name)
// While PTX also allows '%' at the start of identifiers, LLVM will throw a
// fatal error for '%' in symbol names in MCSymbol::print. Exclude for now.
if (isAlnum(C) || C == '_' || C == '$')
ValidName.push_back(C);
else
ValidName.append({'_', '$', '_'});
return ValidName;
}
inline std::string OrderingToString(Ordering Order) {
switch (Order) {
case Ordering::NotAtomic:
return "NotAtomic";
case Ordering::Relaxed:
return "Relaxed";
case Ordering::Acquire:
return "Acquire";
case Ordering::Release:
return "Release";
case Ordering::AcquireRelease:
return "AcquireRelease";
case Ordering::SequentiallyConsistent:
return "SequentiallyConsistent";
case Ordering::Volatile:
return "Volatile";
case Ordering::RelaxedMMIO:
return "RelaxedMMIO";
}
report_fatal_error(formatv("Unknown NVPTX::Ordering \"{}\".",
static_cast<OrderingUnderlyingType>(Order)));
}
inline raw_ostream &operator<<(raw_ostream &O, Ordering Order) {
O << OrderingToString(Order);
return O;
}
inline std::string ScopeToString(Scope S) {
switch (S) {
case Scope::Thread:
return "Thread";
case Scope::System:
return "System";
case Scope::Block:
return "Block";
case Scope::Cluster:
return "Cluster";
case Scope::Device:
return "Device";
}
report_fatal_error(formatv("Unknown NVPTX::Scope \"{}\".",
static_cast<ScopeUnderlyingType>(S)));
}
inline raw_ostream &operator<<(raw_ostream &O, Scope S) {
O << ScopeToString(S);
return O;
}
inline std::string AddressSpaceToString(AddressSpace A) {
switch (A) {
case AddressSpace::Generic:
return "generic";
case AddressSpace::Global:
return "global";
case AddressSpace::Const:
return "const";
case AddressSpace::Shared:
return "shared";
case AddressSpace::SharedCluster:
return "shared::cluster";
case AddressSpace::Param:
return "param";
case AddressSpace::Local:
return "local";
}
report_fatal_error(formatv("Unknown NVPTX::AddressSpace \"{}\".",
static_cast<AddressSpaceUnderlyingType>(A)));
}
inline raw_ostream &operator<<(raw_ostream &O, AddressSpace A) {
O << AddressSpaceToString(A);
return O;
}
} // namespace NVPTX
} // namespace llvm
#endif
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