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SPIRVUtil.cpp
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SPIRVUtil.cpp
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//===- SPIRVUtil.cpp - SPIR-V Utilities -------------------------*- C++ -*-===//
//
// The LLVM/SPIRV Translator
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
// Copyright (c) 2014 Advanced Micro Devices, Inc. All rights reserved.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the "Software"),
// to deal with the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following conditions:
//
// Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimers.
// Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimers in the documentation
// and/or other materials provided with the distribution.
// Neither the names of Advanced Micro Devices, Inc., nor the names of its
// contributors may be used to endorse or promote products derived from this
// Software without specific prior written permission.
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// CONTRIBUTORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS WITH
// THE SOFTWARE.
//
//===----------------------------------------------------------------------===//
/// \file
///
/// This file defines utility classes and functions shared by SPIR-V
/// reader/writer.
///
//===----------------------------------------------------------------------===//
// This file needs to be included before anything that declares
// llvm::PointerType to avoid a compilation bug on MSVC.
#include "llvm/Demangle/ItaniumDemangle.h"
#include "FunctionDescriptor.h"
#include "ManglingUtils.h"
#include "NameMangleAPI.h"
#include "OCLUtil.h"
#include "ParameterType.h"
#include "SPIRVInternal.h"
#include "SPIRVMDWalker.h"
#include "libSPIRV/SPIRVDecorate.h"
#include "libSPIRV/SPIRVValue.h"
#include "llvm/ADT/StringSwitch.h"
#include "llvm/Bitcode/BitcodeWriter.h"
#include "llvm/IR/IRBuilder.h"
#include "llvm/IR/IntrinsicInst.h"
#include "llvm/IR/Metadata.h"
#include "llvm/IR/Operator.h"
#include "llvm/IR/TypedPointerType.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/ToolOutputFile.h"
#include <functional>
#include <sstream>
#define DEBUG_TYPE "spirv"
namespace SPIRV {
#ifdef _SPIRV_SUPPORT_TEXT_FMT
cl::opt<bool, true>
UseTextFormat("spirv-text",
cl::desc("Use text format for SPIR-V for debugging purpose"),
cl::location(SPIRVUseTextFormat));
#endif
#ifdef _SPIRVDBG
cl::opt<bool, true> EnableDbgOutput("spirv-debug",
cl::desc("Enable SPIR-V debug output"),
cl::location(SPIRVDbgEnable));
#endif
bool isSupportedTriple(Triple T) { return T.isSPIR() || T.isSPIRV(); }
void addFnAttr(CallInst *Call, Attribute::AttrKind Attr) {
Call->addFnAttr(Attr);
}
void removeFnAttr(CallInst *Call, Attribute::AttrKind Attr) {
Call->removeFnAttr(Attr);
}
Value *extendVector(Value *V, FixedVectorType *NewType,
IRBuilderBase &Builder) {
unsigned OldSize = cast<FixedVectorType>(V->getType())->getNumElements();
unsigned NewSize = NewType->getNumElements();
assert(OldSize < NewSize);
std::vector<Constant *> Components;
IntegerType *Int32Ty = Builder.getInt32Ty();
for (unsigned I = 0; I < NewSize; I++) {
if (I < OldSize)
Components.push_back(ConstantInt::get(Int32Ty, I));
else
Components.push_back(PoisonValue::get(Int32Ty));
}
return Builder.CreateShuffleVector(V, PoisonValue::get(V->getType()),
ConstantVector::get(Components), "vecext");
}
void saveLLVMModule(Module *M, const std::string &OutputFile) {
std::error_code EC;
ToolOutputFile Out(OutputFile.c_str(), EC, sys::fs::OF_None);
if (EC) {
SPIRVDBG(errs() << "Fails to open output file: " << EC.message();)
return;
}
WriteBitcodeToFile(*M, Out.os());
Out.keep();
}
std::string mapLLVMTypeToOCLType(const Type *Ty, bool Signed, Type *PET) {
if (Ty->isHalfTy())
return "half";
if (Ty->isFloatTy())
return "float";
if (Ty->isDoubleTy())
return "double";
if (const auto *IntTy = dyn_cast<IntegerType>(Ty)) {
std::string SignPrefix;
std::string Stem;
if (!Signed)
SignPrefix = "u";
switch (IntTy->getIntegerBitWidth()) {
case 8:
Stem = "char";
break;
case 16:
Stem = "short";
break;
case 32:
Stem = "int";
break;
case 64:
Stem = "long";
break;
default:
Stem = "invalid_type";
break;
}
return SignPrefix + Stem;
}
if (const auto *VecTy = dyn_cast<FixedVectorType>(Ty)) {
Type *EleTy = VecTy->getElementType();
unsigned Size = VecTy->getNumElements();
std::stringstream Ss;
Ss << mapLLVMTypeToOCLType(EleTy, Signed) << Size;
return Ss.str();
}
// It is expected that `Ty` can be mapped to `ReturnType` from "Optional
// Postfixes for SPIR-V Builtin Function Names" section of
// SPIRVRepresentationInLLVM.rst document (aka SPIRV-friendly IR).
// If `Ty` is not a scalar or vector type mentioned in the document (return
// value of some SPIR-V instructions may be represented as pointer to a struct
// in LLVM IR) we can mangle the type.
BuiltinFuncMangleInfo MangleInfo;
if (Ty->isPointerTy())
Ty = TypedPointerType::get(PET, Ty->getPointerAddressSpace());
std::string MangledName =
mangleBuiltin("", const_cast<Type *>(Ty), &MangleInfo);
// Remove "_Z0"(3 characters) from the front of the name
return MangledName.erase(0, 3);
}
StructType *getOrCreateOpaqueStructType(Module *M, StringRef Name) {
auto *OpaqueType = StructType::getTypeByName(M->getContext(), Name);
if (!OpaqueType)
OpaqueType = StructType::create(M->getContext(), Name);
return OpaqueType;
}
void getFunctionTypeParameterTypes(llvm::FunctionType *FT,
SmallVector<Type *> &ArgTys) {
for (auto I = FT->param_begin(), E = FT->param_end(); I != E; ++I) {
ArgTys.push_back(*I);
}
}
bool isVoidFuncTy(FunctionType *FT) { return FT->getReturnType()->isVoidTy(); }
bool isOCLImageType(llvm::Type *Ty, StringRef *Name) {
if (auto *TPT = dyn_cast_or_null<TypedPointerType>(Ty))
if (auto *ST = dyn_cast_or_null<StructType>(TPT->getElementType()))
if (ST->isOpaque()) {
auto FullName = ST->getName();
if (FullName.find(kSPR2TypeName::ImagePrefix) == 0) {
if (Name)
*Name = FullName.drop_front(strlen(kSPR2TypeName::OCLPrefix));
return true;
}
}
if (auto *TET = dyn_cast_or_null<TargetExtType>(Ty)) {
assert(!Name && "Cannot get the name for a target-extension type image");
return TET->getName() == "spirv.Image";
}
return false;
}
/// \param BaseTyName is the type Name as in spirv.BaseTyName.Postfixes
/// \param Postfix contains postfixes extracted from the SPIR-V image
/// type Name as spirv.BaseTyName.Postfixes.
bool isSPIRVStructType(llvm::Type *Ty, StringRef BaseTyName,
StringRef *Postfix) {
auto *ST = dyn_cast<StructType>(Ty);
if (!ST)
return false;
if (ST->isOpaque()) {
auto FullName = ST->getName();
std::string N =
std::string(kSPIRVTypeName::PrefixAndDelim) + BaseTyName.str();
if (FullName != N)
N = N + kSPIRVTypeName::Delimiter;
if (FullName.starts_with(N)) {
if (Postfix)
*Postfix = FullName.drop_front(N.size());
return true;
}
}
return false;
}
bool isSYCLHalfType(llvm::Type *Ty) {
if (auto *ST = dyn_cast<StructType>(Ty)) {
if (!ST->hasName())
return false;
StringRef Name = ST->getName();
if (!Name.consume_front("class."))
return false;
if ((Name.starts_with("sycl::") || Name.starts_with("cl::sycl::") ||
Name.starts_with("__sycl_internal::")) &&
Name.ends_with("::half")) {
return true;
}
}
return false;
}
bool isSYCLBfloat16Type(llvm::Type *Ty) {
if (auto *ST = dyn_cast<StructType>(Ty)) {
if (!ST->hasName())
return false;
StringRef Name = ST->getName();
if (!Name.consume_front("class."))
return false;
if ((Name.starts_with("sycl::") || Name.starts_with("cl::sycl::") ||
Name.starts_with("__sycl_internal::")) &&
Name.ends_with("::bfloat16")) {
return true;
}
}
return false;
}
Function *getOrCreateFunction(Module *M, Type *RetTy, ArrayRef<Type *> ArgTypes,
StringRef Name, BuiltinFuncMangleInfo *Mangle,
AttributeList *Attrs, bool TakeName) {
std::string MangledName{Name};
bool IsVarArg = false;
if (Mangle) {
MangledName = mangleBuiltin(Name, ArgTypes, Mangle);
IsVarArg = 0 <= Mangle->getVarArg();
if (IsVarArg)
ArgTypes = ArgTypes.slice(0, Mangle->getVarArg());
}
FunctionType *FT = FunctionType::get(RetTy, ArgTypes, IsVarArg);
Function *F = M->getFunction(MangledName);
if (!TakeName && F && F->getFunctionType() != FT && Mangle != nullptr) {
std::string S;
raw_string_ostream SS(S);
SS << "Error: Attempt to redefine function: " << *F << " => " << *FT
<< '\n';
report_fatal_error(llvm::Twine(SS.str()), false);
}
if (!F || F->getFunctionType() != FT) {
auto *NewF =
Function::Create(FT, GlobalValue::ExternalLinkage, MangledName, M);
if (F && TakeName) {
NewF->takeName(F);
LLVM_DEBUG(
dbgs() << "[getOrCreateFunction] Warning: taking function Name\n");
}
if (NewF->getName() != MangledName) {
LLVM_DEBUG(
dbgs() << "[getOrCreateFunction] Warning: function Name changed\n");
}
LLVM_DEBUG(dbgs() << "[getOrCreateFunction] ";
if (F) dbgs() << *F << " => "; dbgs() << *NewF << '\n';);
if (F)
NewF->setDSOLocal(F->isDSOLocal());
F = NewF;
F->setCallingConv(CallingConv::SPIR_FUNC);
if (Attrs)
F->setAttributes(*Attrs);
}
return F;
}
std::vector<Value *> getArguments(CallInst *CI, unsigned Start, unsigned End) {
std::vector<Value *> Args;
if (End == 0)
End = CI->arg_size();
for (; Start != End; ++Start) {
Args.push_back(CI->getArgOperand(Start));
}
return Args;
}
uint64_t getArgAsInt(CallInst *CI, unsigned I) {
return cast<ConstantInt>(CI->getArgOperand(I))->getZExtValue();
}
Scope getArgAsScope(CallInst *CI, unsigned I) {
return static_cast<Scope>(getArgAsInt(CI, I));
}
std::string prefixSPIRVName(const std::string &S) {
return std::string(kSPIRVName::Prefix) + S;
}
StringRef dePrefixSPIRVName(StringRef R, SmallVectorImpl<StringRef> &Postfix) {
const size_t Start = strlen(kSPIRVName::Prefix);
if (!R.starts_with(kSPIRVName::Prefix))
return R;
R = R.drop_front(Start);
R.split(Postfix, "_", -1, false);
auto Name = Postfix.front();
Postfix.erase(Postfix.begin());
return Name;
}
std::string getSPIRVFuncName(Op OC, StringRef PostFix) {
return prefixSPIRVName(getName(OC) + PostFix.str());
}
std::string getSPIRVFuncName(Op OC, const Type *PRetTy, bool IsSigned,
Type *PET) {
return prefixSPIRVName(getName(OC) + kSPIRVPostfix::Divider +
getPostfixForReturnType(PRetTy, IsSigned, PET));
}
std::string getSPIRVFuncName(SPIRVBuiltinVariableKind BVKind) {
return prefixSPIRVName(getName(BVKind));
}
std::string getSPIRVExtFuncName(SPIRVExtInstSetKind Set, unsigned ExtOp,
StringRef PostFix) {
std::string ExtOpName;
switch (Set) {
default:
llvm_unreachable("invalid extended instruction set");
ExtOpName = "unknown";
break;
case SPIRVEIS_OpenCL:
ExtOpName = getName(static_cast<OCLExtOpKind>(ExtOp));
break;
}
return prefixSPIRVName(SPIRVExtSetShortNameMap::map(Set) + '_' + ExtOpName +
PostFix.str());
}
SPIRVDecorate *mapPostfixToDecorate(StringRef Postfix, SPIRVEntry *Target) {
if (Postfix == kSPIRVPostfix::Sat)
return new SPIRVDecorate(spv::DecorationSaturatedConversion, Target);
if (Postfix.starts_with(kSPIRVPostfix::Rt))
return new SPIRVDecorate(spv::DecorationFPRoundingMode, Target,
map<SPIRVFPRoundingModeKind>(Postfix.str()));
return nullptr;
}
SPIRVValue *addDecorations(SPIRVValue *Target,
const SmallVectorImpl<std::string> &Decs) {
for (auto &I : Decs)
if (auto *Dec = mapPostfixToDecorate(I, Target))
Target->addDecorate(Dec);
return Target;
}
std::string getPostfixForReturnType(CallInst *CI, bool IsSigned) {
return getPostfixForReturnType(CI->getType(), IsSigned);
}
std::string getPostfixForReturnType(const Type *PRetTy, bool IsSigned,
Type *PET) {
return std::string(kSPIRVPostfix::Return) +
mapLLVMTypeToOCLType(PRetTy, IsSigned, PET);
}
// Enqueue kernel, kernel query, pipe and address space cast built-ins
// are not mangled.
bool isNonMangledOCLBuiltin(StringRef Name) {
if (!Name.starts_with("__"))
return false;
return isEnqueueKernelBI(Name) || isKernelQueryBI(Name) ||
isPipeOrAddressSpaceCastBI(Name.drop_front(2));
}
Op getSPIRVFuncOC(StringRef S, SmallVectorImpl<std::string> *Dec) {
Op OC;
SmallVector<StringRef, 2> Postfix;
StringRef Name;
if (!oclIsBuiltin(S, Name))
Name = S;
StringRef R(Name);
if ((!Name.starts_with(kSPIRVName::Prefix) && !isNonMangledOCLBuiltin(S)) ||
!getByName(dePrefixSPIRVName(R, Postfix).str(), OC)) {
return OpNop;
}
if (Dec)
for (auto &I : Postfix)
Dec->push_back(I.str());
return OC;
}
bool getSPIRVBuiltin(const std::string &OrigName, spv::BuiltIn &B) {
SmallVector<StringRef, 2> Postfix;
StringRef R(OrigName);
R = dePrefixSPIRVName(R, Postfix);
if (!Postfix.empty())
return false;
return getByName(R.str(), B);
}
// Demangled name is a substring of the name. The DemangledName is updated only
// if true is returned
bool oclIsBuiltin(StringRef Name, StringRef &DemangledName, bool IsCpp) {
if (Name == "printf") {
DemangledName = "__spirv_ocl_printf";
return true;
}
if (isNonMangledOCLBuiltin(Name)) {
DemangledName = Name.drop_front(2);
return true;
}
if (!Name.starts_with("_Z"))
return false;
// OpenCL C++ built-ins are declared in cl namespace.
// TODO: consider using 'St' abbriviation for cl namespace mangling.
// Similar to ::std:: in C++.
if (IsCpp) {
if (!Name.starts_with("_ZN"))
return false;
// Skip CV and ref qualifiers.
size_t NameSpaceStart = Name.find_first_not_of("rVKRO", 3);
// All built-ins are in the ::cl:: namespace.
if (Name.substr(NameSpaceStart, 11) != "2cl7__spirv")
return false;
size_t DemangledNameLenStart = NameSpaceStart + 11;
size_t Start = Name.find_first_not_of("0123456789", DemangledNameLenStart);
size_t Len = 0;
if (!Name.substr(DemangledNameLenStart, Start - DemangledNameLenStart)
.getAsInteger(10, Len)) {
DemangledName = Name.substr(Start, Len);
return true;
}
SPIRVDBG(errs() << "Error in extracting integer value");
return false;
}
size_t Start = Name.find_first_not_of("0123456789", 2);
size_t Len = 0;
if (!Name.substr(2, Start - 2).getAsInteger(10, Len)) {
DemangledName = Name.substr(Start, Len);
return true;
}
SPIRVDBG(errs() << "Error in extracting integer value");
return false;
}
// Check if a mangled type Name is unsigned
bool isMangledTypeUnsigned(char Mangled) {
return Mangled == 'h' /* uchar */
|| Mangled == 't' /* ushort */
|| Mangled == 'j' /* uint */
|| Mangled == 'm' /* ulong */;
}
// Check if a mangled type Name is signed
bool isMangledTypeSigned(char Mangled) {
return Mangled == 'c' /* char */
|| Mangled == 'a' /* signed char */
|| Mangled == 's' /* short */
|| Mangled == 'i' /* int */
|| Mangled == 'l' /* long */;
}
// Check if a mangled type Name is floating point (excludes half)
bool isMangledTypeFP(char Mangled) {
return Mangled == 'f' /* float */
|| Mangled == 'd'; /* double */
}
// Check if a mangled type Name is half
bool isMangledTypeHalf(std::string Mangled) {
return Mangled == "Dh"; /* half */
}
void eraseSubstitutionFromMangledName(std::string &MangledName) {
auto Len = MangledName.length();
while (Len >= 2 && MangledName.substr(Len - 2, 2) == "S_") {
Len -= 2;
MangledName.erase(Len, 2);
}
}
ParamType lastFuncParamType(StringRef MangledName) {
std::string Copy(MangledName);
eraseSubstitutionFromMangledName(Copy);
char Mangled = Copy.back();
std::string Mangled2 = Copy.substr(Copy.size() - 2);
if (isMangledTypeFP(Mangled) || isMangledTypeHalf(Mangled2)) {
return ParamType::FLOAT;
} else if (isMangledTypeUnsigned(Mangled)) {
return ParamType::UNSIGNED;
} else if (isMangledTypeSigned(Mangled)) {
return ParamType::SIGNED;
}
return ParamType::UNKNOWN;
}
// Check if the last argument is signed
bool isLastFuncParamSigned(StringRef MangledName) {
return lastFuncParamType(MangledName) == ParamType::SIGNED;
}
// Check if a mangled function Name contains unsigned atomic type
bool containsUnsignedAtomicType(StringRef Name) {
auto Loc = Name.find(kMangledName::AtomicPrefixIncoming);
if (Loc == StringRef::npos)
return false;
return isMangledTypeUnsigned(
Name[Loc + strlen(kMangledName::AtomicPrefixIncoming)]);
}
bool hasArrayArg(Function *F) {
for (auto I = F->arg_begin(), E = F->arg_end(); I != E; ++I) {
LLVM_DEBUG(dbgs() << "[hasArrayArg] " << *I << '\n');
if (I->getType()->isArrayTy()) {
return true;
}
}
return false;
}
/// Convert a struct name from the name given to it in Itanium name mangling to
/// the name given to it as an LLVM opaque struct.
static std::string demangleBuiltinOpenCLTypeName(StringRef MangledStructName) {
assert(MangledStructName.starts_with("ocl_") &&
"Not a valid builtin OpenCL mangled name");
// Bare structure type that starts with ocl_ is a builtin opencl type.
// See clang/lib/CodeGen/CGOpenCLRuntime for how these map to LLVM types
// and clang/lib/AST/ItaniumMangle for how they are mangled.
// In general, ocl_<foo> is mapped to pointer-to-%opencl.<foo>, but
// there is some variance around whether or not _t is included in the
// mangled name.
std::string LlvmStructName = StringSwitch<StringRef>(MangledStructName)
.Case("ocl_sampler", "opencl.sampler_t")
.Case("ocl_event", "opencl.event_t")
.Case("ocl_clkevent", "opencl.clk_event_t")
.Case("ocl_queue", "opencl.queue_t")
.Case("ocl_reserveid", "opencl.reserve_id_t")
.Default("")
.str();
if (LlvmStructName.empty()) {
LlvmStructName = "opencl.";
LlvmStructName += MangledStructName.substr(4); // Strip off ocl_
if (!MangledStructName.ends_with("_t"))
LlvmStructName += "_t";
}
return LlvmStructName;
}
/// Convert a C/C++ type name into an LLVM type, if it's a basic integer or
/// floating point type.
static Type *parsePrimitiveType(LLVMContext &Ctx, StringRef Name) {
return StringSwitch<Type *>(Name)
.Cases("char", "signed char", "unsigned char", Type::getInt8Ty(Ctx))
.Cases("short", "unsigned short", Type::getInt16Ty(Ctx))
.Cases("int", "unsigned int", Type::getInt32Ty(Ctx))
.Cases("long", "unsigned long", Type::getInt64Ty(Ctx))
.Cases("long long", "unsigned long long", Type::getInt64Ty(Ctx))
.Case("half", Type::getHalfTy(Ctx))
.Case("float", Type::getFloatTy(Ctx))
.Case("double", Type::getDoubleTy(Ctx))
.Case("void", Type::getInt8Ty(Ctx))
.Default(nullptr);
}
} // namespace SPIRV
// The demangler node hierarchy doesn't use LLVM's RTTI helper functions (as it
// also needs to live in libcxxabi). By specializing this implementation here,
// we can add support for these functions.
#define NODE(X) \
template <typename From> struct llvm::isa_impl<itanium_demangle::X, From> { \
static inline bool doit(const From &Val) { \
return Val.getKind() == itanium_demangle::Node::K##X; \
} \
};
#include "llvm/Demangle/ItaniumNodes.def"
namespace SPIRV {
namespace {
// An allocator to use with the demangler API.
class DefaultAllocator {
BumpPtrAllocator Alloc;
public:
void reset() { Alloc.Reset(); }
template <typename T, typename... Args> T *makeNode(Args &&...ArgList) {
return new (Alloc.Allocate(sizeof(T), alignof(T)))
T(std::forward<Args>(ArgList)...);
}
void *allocateNodeArray(size_t Sz) {
using namespace llvm::itanium_demangle;
return Alloc.Allocate(sizeof(Node *) * Sz, alignof(Node *));
}
};
} // unnamed namespace
static StringRef stringify(const itanium_demangle::NameType *Node) {
return Node->getName();
}
/// Convert a mangled name that represents a basic integer, floating-point,
/// etc. type into the corresponding LLVM type.
static Type *getPrimitiveType(LLVMContext &Ctx,
const llvm::itanium_demangle::Node *N) {
using namespace llvm::itanium_demangle;
if (auto *Name = dyn_cast<NameType>(N)) {
return parsePrimitiveType(Ctx, stringify(Name));
}
if (auto *BitInt = dyn_cast<BitIntType>(N)) {
unsigned BitWidth = 0;
BitInt->match([&](const Node *NodeSize, bool) {
const StringRef SizeStr(stringify(cast<NameType>(NodeSize)));
SizeStr.getAsInteger(10, BitWidth);
});
return Type::getIntNTy(Ctx, BitWidth);
}
if (auto *FP = dyn_cast<BinaryFPType>(N)) {
StringRef SizeStr;
FP->match([&](const Node *NodeDimension) {
SizeStr = stringify(cast<NameType>(NodeDimension));
});
return StringSwitch<Type *>(SizeStr)
.Case("16", Type::getHalfTy(Ctx))
.Case("32", Type::getFloatTy(Ctx))
.Case("64", Type::getDoubleTy(Ctx))
.Case("128", Type::getFP128Ty(Ctx))
.Default(nullptr);
}
return nullptr;
}
template <typename FnType>
static TypedPointerType *
parseNode(Module *M, const llvm::itanium_demangle::Node *ParamType,
FnType GetStructType) {
using namespace llvm::itanium_demangle;
Type *PointeeTy = nullptr;
unsigned AS = 0;
if (auto *Name = dyn_cast<NameType>(ParamType)) {
// This corresponds to a simple class name. Since we only care about
// pointer element types, the only relevant names are those corresponding
// to the OpenCL special types (which all begin with "ocl_").
StringRef Arg(stringify(Name));
if (Arg.starts_with("ocl_")) {
const std::string StructName = demangleBuiltinOpenCLTypeName(Arg);
PointeeTy = GetStructType(StructName);
} else if (Arg.consume_front("__spirv_")) {
// This is a pointer to a SPIR-V OpType* opaque struct. In general,
// convert __spirv_<Type>[__Suffix] to %spirv.Type[._Suffix]
auto NameSuffixPair = Arg.split('_');
std::string StructName = "spirv.";
StructName += NameSuffixPair.first;
if (!NameSuffixPair.second.empty()) {
StructName += ".";
StructName += NameSuffixPair.second;
}
PointeeTy = GetStructType(StructName);
} else if (Arg == "ndrange_t") {
PointeeTy = GetStructType(Arg);
}
} else if (auto *P = dyn_cast<itanium_demangle::PointerType>(ParamType)) {
const Node *Pointee = P->getPointee();
// Strip through all of the qualifiers on the pointee type.
while (true) {
if (auto *VendorTy = dyn_cast<VendorExtQualType>(Pointee)) {
Pointee = VendorTy->getTy();
StringRef Qualifier(&*VendorTy->getExt().begin(),
VendorTy->getExt().size());
if (Qualifier.consume_front("AS")) {
Qualifier.getAsInteger(10, AS);
}
} else if (auto *Qual = dyn_cast<QualType>(Pointee)) {
Pointee = Qual->getChild();
} else {
break;
}
}
if (auto *Name = dyn_cast<NameType>(Pointee)) {
StringRef MangledStructName(stringify(Name));
if (MangledStructName.consume_front("__spirv_")) {
// This is a pointer to a SPIR-V OpType* opaque struct. In general,
// convert __spirv_<Type>[__Suffix] to %spirv.Type[._Suffix]
auto NameSuffixPair = MangledStructName.split('_');
std::string StructName = "spirv.";
StructName += NameSuffixPair.first;
if (!NameSuffixPair.second.empty()) {
StructName += ".";
StructName += NameSuffixPair.second;
}
PointeeTy = GetStructType(StructName);
} else if (MangledStructName.starts_with("opencl.")) {
PointeeTy = GetStructType(MangledStructName);
} else if (MangledStructName.starts_with("ocl_")) {
const std::string StructName =
demangleBuiltinOpenCLTypeName(MangledStructName);
PointeeTy = TypedPointerType::get(GetStructType(StructName), 0);
} else {
PointeeTy = parsePrimitiveType(M->getContext(), MangledStructName);
}
} else if (auto *Ty = getPrimitiveType(M->getContext(), Pointee)) {
PointeeTy = Ty;
} else if (auto *Vec = dyn_cast<itanium_demangle::VectorType>(Pointee)) {
unsigned ElemCount = 0;
const StringRef ElemCountStr(
stringify(cast<NameType>(Vec->getDimension())));
ElemCountStr.getAsInteger(10, ElemCount);
if (auto *Ty = getPrimitiveType(M->getContext(), Vec->getBaseType())) {
PointeeTy = llvm::VectorType::get(Ty, ElemCount, false);
}
} else if (llvm::isa<itanium_demangle::PointerType>(Pointee)) {
PointeeTy = parseNode(M, Pointee, GetStructType);
} else {
// Other possible pointee types do not correspond to any of the special
// struct types were are looking for here.
}
} else if (auto *VendorTy = dyn_cast<VendorExtQualType>(ParamType)) {
// This is a block parameter. Decode the pointee type as if it were a
// void (*)(void) function pointer type.
if (VendorTy->getExt() == "block_pointer") {
PointeeTy =
llvm::FunctionType::get(Type::getVoidTy(M->getContext()), false);
}
} else {
// Other parameter types are not likely to be pointer types, so we can
// ignore these.
}
return PointeeTy ? TypedPointerType::get(PointeeTy, AS) : nullptr;
}
bool getParameterTypes(Function *F, SmallVectorImpl<Type *> &ArgTys,
std::function<std::string(StringRef)> NameMapFn) {
using namespace llvm::itanium_demangle;
// If there's no mangled name, we can't do anything. Also, if there's no
// parameters, do nothing.
StringRef Name = F->getName();
if (!Name.starts_with("_Z") || F->arg_empty())
return Name.starts_with("_Z");
Module *M = F->getParent();
auto GetStructType = [&](StringRef Name) {
return getOrCreateOpaqueStructType(M, NameMapFn ? NameMapFn(Name) : Name);
};
// Start by filling in a skeleton of information we can get from the LLVM type
// itself.
ArgTys.clear();
auto *FT = F->getFunctionType();
ArgTys.reserve(FT->getNumParams());
bool HasSret = false;
for (Argument &Arg : F->args()) {
if (!Arg.getType()->isPointerTy())
ArgTys.push_back(Arg.getType());
else if (Type *Ty = Arg.getParamStructRetType()) {
assert(!HasSret && &Arg == F->getArg(0) &&
"sret parameter should only appear on the first argument");
HasSret = true;
unsigned AS = Arg.getType()->getPointerAddressSpace();
if (auto *STy = dyn_cast<StructType>(Ty))
if (STy->hasName())
ArgTys.push_back(
TypedPointerType::get(GetStructType(STy->getName()), AS));
else
ArgTys.push_back(TypedPointerType::get(STy, AS));
else
ArgTys.push_back(TypedPointerType::get(Ty, AS));
} else {
ArgTys.push_back(Arg.getType());
}
}
// Skip the first argument if it's an sret parameter--this would be an
// implicit parameter not recognized as part of the function parameters.
auto *ArgIter = ArgTys.begin();
if (HasSret)
++ArgIter;
// Demangle the function arguments. If we get an input name of
// "_Z12write_imagei20ocl_image1d_array_woDv2_iiDv4_i", then we expect
// that Demangler.getFunctionParameters will return
// "(ocl_image1d_array_wo, int __vector(2), int, int __vector(4))" (in other
// words, the stuff between the parentheses if you ran C++ filt, including
// the parentheses itself).
const StringRef MangledName(F->getName());
ManglingParser<DefaultAllocator> Demangler(MangledName.begin(),
MangledName.end());
// We expect to see only function name encodings here. If it's not a function
// name encoding, bail out.
auto *RootNode = dyn_cast_or_null<FunctionEncoding>(Demangler.parse());
if (!RootNode)
return false;
// Get the parameter list. If the function is a vararg function, drop the last
// parameter.
NodeArray Params = RootNode->getParams();
if (F->isVarArg()) {
bool HasVarArgParam = false;
if (!Params.empty()) {
if (auto *Name = dyn_cast<NameType>(Params[Params.size() - 1])) {
if (stringify(Name) == "...")
HasVarArgParam = true;
}
}
if (HasVarArgParam) {
Params = NodeArray(Params.begin(), Params.size() - 1);
} else {
LLVM_DEBUG(dbgs() << "[getParameterTypes] function " << MangledName
<< " was expected to have a varargs parameter\n");
return false;
}
}
// Sanity check that the name mangling matches up to the expected number of
// arguments.
if (Params.size() != (size_t)(ArgTys.end() - ArgIter)) {
LLVM_DEBUG(dbgs() << "[getParameterTypes] function " << MangledName
<< " appears to have " << Params.size()
<< " arguments but has " << (ArgTys.end() - ArgIter)
<< "\n");
return false;
}
// Overwrite the types of pointer-typed arguments with information from
// demangling.
bool DemangledSuccessfully = true;
for (auto *ParamType : Params) {
Type *ArgTy = *ArgIter;
Type *DemangledTy = parseNode(M, ParamType, GetStructType);
if (ArgTy->isPointerTy() && DemangledTy == nullptr) {
DemangledTy = TypedPointerType::get(Type::getInt8Ty(ArgTy->getContext()),
ArgTy->getPointerAddressSpace());
LLVM_DEBUG(dbgs() << "Failed to recover type of argument " << *ArgTy
<< " of function " << F->getName() << "\n");
DemangledSuccessfully = false;
} else if (ArgTy->isTargetExtTy() || !DemangledTy)
DemangledTy = ArgTy;
if (auto *TPT = dyn_cast<TypedPointerType>(DemangledTy))
if (ArgTy->isPointerTy() &&
TPT->getAddressSpace() != ArgTy->getPointerAddressSpace())
DemangledTy = TypedPointerType::get(TPT->getElementType(),
ArgTy->getPointerAddressSpace());
*ArgIter++ = DemangledTy;
}
return DemangledSuccessfully;
}
bool getRetParamSignedness(Function *F, ParamSignedness &RetSignedness,
SmallVectorImpl<ParamSignedness> &ArgSignedness) {
using namespace llvm::itanium_demangle;
StringRef Name = F->getName();
if (!Name.starts_with("_Z") || F->arg_empty())
return false;
ManglingParser<DefaultAllocator> Demangler(Name.begin(), Name.end());
// If it's not a function name encoding, bail out.
auto *RootNode = dyn_cast_or_null<FunctionEncoding>(Demangler.parse());
if (!RootNode)
return false;
auto GetSignedness = [](const itanium_demangle::Node *N) {
if (!N)
return ParamSignedness::Unknown;
if (const auto *Vec = dyn_cast<itanium_demangle::VectorType>(N))
N = Vec->getBaseType();
if (const auto *Name = dyn_cast<NameType>(N)) {
StringRef Arg(stringify(Name));
if (Arg.starts_with("unsigned"))
return ParamSignedness::Unsigned;
if (Arg == "char" || Arg == "short" || Arg == "int" || Arg == "long")
return ParamSignedness::Signed;
}
return ParamSignedness::Unknown;
};
RetSignedness = GetSignedness(RootNode->getReturnType());
ArgSignedness.resize(F->arg_size());
for (const auto &[I, ParamType] : llvm::enumerate(RootNode->getParams())) {
if (F->getArg(I)->getType()->isIntOrIntVectorTy())
ArgSignedness[I] = GetSignedness(ParamType);
else
ArgSignedness[I] = ParamSignedness::Unknown;
}
return true;
}
CallInst *mutateCallInst(
Module *M, CallInst *CI,
std::function<std::string(CallInst *, std::vector<Value *> &)> ArgMutate,
BuiltinFuncMangleInfo *Mangle, AttributeList *Attrs, bool TakeFuncName) {
LLVM_DEBUG(dbgs() << "[mutateCallInst] " << *CI);
auto Args = getArguments(CI);
auto NewName = ArgMutate(CI, Args);
std::string InstName;
if (!CI->getType()->isVoidTy() && CI->hasName()) {
InstName = CI->getName().str();
CI->setName(InstName + ".old");
}
auto *NewCI = addCallInst(M, NewName, CI->getType(), Args, Attrs, CI, Mangle,
InstName, TakeFuncName);
NewCI->setDebugLoc(CI->getDebugLoc());
LLVM_DEBUG(dbgs() << " => " << *NewCI << '\n');
CI->replaceAllUsesWith(NewCI);
CI->eraseFromParent();
return NewCI;
}
Instruction *mutateCallInst(
Module *M, CallInst *CI,
std::function<std::string(CallInst *, std::vector<Value *> &, Type *&RetTy)>
ArgMutate,
std::function<Instruction *(CallInst *)> RetMutate,
BuiltinFuncMangleInfo *Mangle, AttributeList *Attrs, bool TakeFuncName) {
LLVM_DEBUG(dbgs() << "[mutateCallInst] " << *CI);
auto Args = getArguments(CI);
Type *RetTy = CI->getType();
auto NewName = ArgMutate(CI, Args, RetTy);
StringRef InstName = CI->getName();
auto *NewCI = addCallInst(M, NewName, RetTy, Args, Attrs, CI, Mangle, InstName,
TakeFuncName);
auto *NewI = RetMutate(NewCI);
NewI->takeName(CI);
NewI->setDebugLoc(CI->getDebugLoc());
LLVM_DEBUG(dbgs() << " => " << *NewI << '\n');
if (!CI->getType()->isVoidTy())
CI->replaceAllUsesWith(NewI);
CI->eraseFromParent();
return NewI;
}
void mutateFunction(
Function *F,
std::function<std::string(CallInst *, std::vector<Value *> &)> ArgMutate,
BuiltinFuncMangleInfo *Mangle, AttributeList *Attrs, bool TakeFuncName) {
auto *M = F->getParent();
for (auto I = F->user_begin(), E = F->user_end(); I != E;) {
if (auto *CI = dyn_cast<CallInst>(*I++))
mutateCallInst(M, CI, ArgMutate, Mangle, Attrs, TakeFuncName);
}
if (F->use_empty())
F->eraseFromParent();
}
void mutateFunction(
Function *F,
std::function<std::string(CallInst *, std::vector<Value *> &, Type *&RetTy)>
ArgMutate,
std::function<Instruction *(CallInst *)> RetMutate,
BuiltinFuncMangleInfo *Mangle, AttributeList *Attrs, bool TakeName) {
auto *M = F->getParent();
for (auto I = F->user_begin(), E = F->user_end(); I != E;) {
if (auto *CI = dyn_cast<CallInst>(*I++))