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llvm-project/llvm/lib/CodeGen/MIRParser/MIRParser.cpp

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//===- MIRParser.cpp - MIR serialization format parser implementation -----===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements the class that parses the optional LLVM IR and machine
// functions that are stored in MIR files.
//
//===----------------------------------------------------------------------===//
#include "llvm/CodeGen/MIRParser/MIRParser.h"
#include "MIParser.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/StringMap.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/AsmParser/Parser.h"
#include "llvm/AsmParser/SlotMapping.h"
#include "llvm/CodeGen/MachineConstantPool.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineModuleInfo.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/CodeGen/MIRYamlMapping.h"
#include "llvm/IR/BasicBlock.h"
#include "llvm/IR/DiagnosticInfo.h"
#include "llvm/IR/Instructions.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/IR/Module.h"
#include "llvm/IR/ValueSymbolTable.h"
#include "llvm/Support/LineIterator.h"
#include "llvm/Support/SMLoc.h"
#include "llvm/Support/SourceMgr.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/YAMLTraits.h"
#include <memory>
using namespace llvm;
namespace llvm {
/// This class implements the parsing of LLVM IR that's embedded inside a MIR
/// file.
class MIRParserImpl {
SourceMgr SM;
StringRef Filename;
LLVMContext &Context;
StringMap<std::unique_ptr<yaml::MachineFunction>> Functions;
SlotMapping IRSlots;
/// Maps from register class names to register classes.
StringMap<const TargetRegisterClass *> Names2RegClasses;
public:
MIRParserImpl(std::unique_ptr<MemoryBuffer> Contents, StringRef Filename,
LLVMContext &Context);
void reportDiagnostic(const SMDiagnostic &Diag);
/// Report an error with the given message at unknown location.
///
/// Always returns true.
bool error(const Twine &Message);
/// Report an error with the given message at the given location.
///
/// Always returns true.
bool error(SMLoc Loc, const Twine &Message);
/// Report a given error with the location translated from the location in an
/// embedded string literal to a location in the MIR file.
///
/// Always returns true.
bool error(const SMDiagnostic &Error, SMRange SourceRange);
/// Try to parse the optional LLVM module and the machine functions in the MIR
/// file.
///
/// Return null if an error occurred.
std::unique_ptr<Module> parse();
/// Parse the machine function in the current YAML document.
///
/// \param NoLLVMIR - set to true when the MIR file doesn't have LLVM IR.
/// A dummy IR function is created and inserted into the given module when
/// this parameter is true.
///
/// Return true if an error occurred.
bool parseMachineFunction(yaml::Input &In, Module &M, bool NoLLVMIR);
/// Initialize the machine function to the state that's described in the MIR
/// file.
///
/// Return true if error occurred.
bool initializeMachineFunction(MachineFunction &MF);
bool initializeRegisterInfo(MachineFunction &MF,
const yaml::MachineFunction &YamlMF,
PerFunctionMIParsingState &PFS);
void inferRegisterInfo(MachineFunction &MF,
const yaml::MachineFunction &YamlMF);
bool initializeFrameInfo(MachineFunction &MF,
const yaml::MachineFunction &YamlMF,
PerFunctionMIParsingState &PFS);
bool parseCalleeSavedRegister(MachineFunction &MF,
PerFunctionMIParsingState &PFS,
std::vector<CalleeSavedInfo> &CSIInfo,
const yaml::StringValue &RegisterSource,
int FrameIdx);
bool parseStackObjectsDebugInfo(MachineFunction &MF,
PerFunctionMIParsingState &PFS,
const yaml::MachineStackObject &Object,
int FrameIdx);
bool initializeConstantPool(MachineConstantPool &ConstantPool,
const yaml::MachineFunction &YamlMF,
const MachineFunction &MF,
DenseMap<unsigned, unsigned> &ConstantPoolSlots);
bool initializeJumpTableInfo(MachineFunction &MF,
const yaml::MachineJumpTable &YamlJTI,
PerFunctionMIParsingState &PFS);
private:
bool parseMDNode(MDNode *&Node, const yaml::StringValue &Source,
MachineFunction &MF, const PerFunctionMIParsingState &PFS);
bool parseMBBReference(MachineBasicBlock *&MBB,
const yaml::StringValue &Source, MachineFunction &MF,
const PerFunctionMIParsingState &PFS);
/// Return a MIR diagnostic converted from an MI string diagnostic.
SMDiagnostic diagFromMIStringDiag(const SMDiagnostic &Error,
SMRange SourceRange);
/// Return a MIR diagnostic converted from a diagnostic located in a YAML
/// block scalar string.
SMDiagnostic diagFromBlockStringDiag(const SMDiagnostic &Error,
SMRange SourceRange);
/// Create an empty function with the given name.
void createDummyFunction(StringRef Name, Module &M);
void initNames2RegClasses(const MachineFunction &MF);
/// Check if the given identifier is a name of a register class.
///
/// Return null if the name isn't a register class.
const TargetRegisterClass *getRegClass(const MachineFunction &MF,
StringRef Name);
};
} // end namespace llvm
MIRParserImpl::MIRParserImpl(std::unique_ptr<MemoryBuffer> Contents,
StringRef Filename, LLVMContext &Context)
: SM(), Filename(Filename), Context(Context) {
SM.AddNewSourceBuffer(std::move(Contents), SMLoc());
}
bool MIRParserImpl::error(const Twine &Message) {
Context.diagnose(DiagnosticInfoMIRParser(
DS_Error, SMDiagnostic(Filename, SourceMgr::DK_Error, Message.str())));
return true;
}
bool MIRParserImpl::error(SMLoc Loc, const Twine &Message) {
Context.diagnose(DiagnosticInfoMIRParser(
DS_Error, SM.GetMessage(Loc, SourceMgr::DK_Error, Message)));
return true;
}
bool MIRParserImpl::error(const SMDiagnostic &Error, SMRange SourceRange) {
assert(Error.getKind() == SourceMgr::DK_Error && "Expected an error");
reportDiagnostic(diagFromMIStringDiag(Error, SourceRange));
return true;
}
void MIRParserImpl::reportDiagnostic(const SMDiagnostic &Diag) {
DiagnosticSeverity Kind;
switch (Diag.getKind()) {
case SourceMgr::DK_Error:
Kind = DS_Error;
break;
case SourceMgr::DK_Warning:
Kind = DS_Warning;
break;
case SourceMgr::DK_Note:
Kind = DS_Note;
break;
}
Context.diagnose(DiagnosticInfoMIRParser(Kind, Diag));
}
static void handleYAMLDiag(const SMDiagnostic &Diag, void *Context) {
reinterpret_cast<MIRParserImpl *>(Context)->reportDiagnostic(Diag);
}
std::unique_ptr<Module> MIRParserImpl::parse() {
yaml::Input In(SM.getMemoryBuffer(SM.getMainFileID())->getBuffer(),
/*Ctxt=*/nullptr, handleYAMLDiag, this);
In.setContext(&In);
if (!In.setCurrentDocument()) {
if (In.error())
return nullptr;
// Create an empty module when the MIR file is empty.
return llvm::make_unique<Module>(Filename, Context);
}
std::unique_ptr<Module> M;
bool NoLLVMIR = false;
// Parse the block scalar manually so that we can return unique pointer
// without having to go trough YAML traits.
if (const auto *BSN =
dyn_cast_or_null<yaml::BlockScalarNode>(In.getCurrentNode())) {
SMDiagnostic Error;
M = parseAssembly(MemoryBufferRef(BSN->getValue(), Filename), Error,
Context, &IRSlots);
if (!M) {
reportDiagnostic(diagFromBlockStringDiag(Error, BSN->getSourceRange()));
return M;
}
In.nextDocument();
if (!In.setCurrentDocument())
return M;
} else {
// Create an new, empty module.
M = llvm::make_unique<Module>(Filename, Context);
NoLLVMIR = true;
}
// Parse the machine functions.
do {
if (parseMachineFunction(In, *M, NoLLVMIR))
return nullptr;
In.nextDocument();
} while (In.setCurrentDocument());
return M;
}
bool MIRParserImpl::parseMachineFunction(yaml::Input &In, Module &M,
bool NoLLVMIR) {
auto MF = llvm::make_unique<yaml::MachineFunction>();
yaml::yamlize(In, *MF, false);
if (In.error())
return true;
auto FunctionName = MF->Name;
if (Functions.find(FunctionName) != Functions.end())
return error(Twine("redefinition of machine function '") + FunctionName +
"'");
Functions.insert(std::make_pair(FunctionName, std::move(MF)));
if (NoLLVMIR)
createDummyFunction(FunctionName, M);
else if (!M.getFunction(FunctionName))
return error(Twine("function '") + FunctionName +
"' isn't defined in the provided LLVM IR");
return false;
}
void MIRParserImpl::createDummyFunction(StringRef Name, Module &M) {
auto &Context = M.getContext();
Function *F = cast<Function>(M.getOrInsertFunction(
Name, FunctionType::get(Type::getVoidTy(Context), false)));
BasicBlock *BB = BasicBlock::Create(Context, "entry", F);
new UnreachableInst(Context, BB);
}
bool MIRParserImpl::initializeMachineFunction(MachineFunction &MF) {
auto It = Functions.find(MF.getName());
if (It == Functions.end())
return error(Twine("no machine function information for function '") +
MF.getName() + "' in the MIR file");
// TODO: Recreate the machine function.
const yaml::MachineFunction &YamlMF = *It->getValue();
if (YamlMF.Alignment)
MF.setAlignment(YamlMF.Alignment);
MF.setExposesReturnsTwice(YamlMF.ExposesReturnsTwice);
MF.setHasInlineAsm(YamlMF.HasInlineAsm);
if (YamlMF.AllVRegsAllocated)
MF.getProperties().set(MachineFunctionProperties::Property::AllVRegsAllocated);
PerFunctionMIParsingState PFS;
if (initializeRegisterInfo(MF, YamlMF, PFS))
return true;
if (!YamlMF.Constants.empty()) {
auto *ConstantPool = MF.getConstantPool();
assert(ConstantPool && "Constant pool must be created");
if (initializeConstantPool(*ConstantPool, YamlMF, MF,
PFS.ConstantPoolSlots))
return true;
}
SMDiagnostic Error;
if (parseMachineBasicBlockDefinitions(MF, YamlMF.Body.Value.Value, PFS,
IRSlots, Error)) {
reportDiagnostic(
diagFromBlockStringDiag(Error, YamlMF.Body.Value.SourceRange));
return true;
}
if (MF.empty())
return error(Twine("machine function '") + Twine(MF.getName()) +
"' requires at least one machine basic block in its body");
// Initialize the frame information after creating all the MBBs so that the
// MBB references in the frame information can be resolved.
if (initializeFrameInfo(MF, YamlMF, PFS))
return true;
// Initialize the jump table after creating all the MBBs so that the MBB
// references can be resolved.
if (!YamlMF.JumpTableInfo.Entries.empty() &&
initializeJumpTableInfo(MF, YamlMF.JumpTableInfo, PFS))
return true;
// Parse the machine instructions after creating all of the MBBs so that the
// parser can resolve the MBB references.
if (parseMachineInstructions(MF, YamlMF.Body.Value.Value, PFS, IRSlots,
Error)) {
reportDiagnostic(
diagFromBlockStringDiag(Error, YamlMF.Body.Value.SourceRange));
return true;
}
inferRegisterInfo(MF, YamlMF);
// FIXME: This is a temporary workaround until the reserved registers can be
// serialized.
MF.getRegInfo().freezeReservedRegs(MF);
MF.verify();
return false;
}
bool MIRParserImpl::initializeRegisterInfo(MachineFunction &MF,
const yaml::MachineFunction &YamlMF,
PerFunctionMIParsingState &PFS) {
MachineRegisterInfo &RegInfo = MF.getRegInfo();
assert(RegInfo.isSSA());
if (!YamlMF.IsSSA)
RegInfo.leaveSSA();
assert(RegInfo.tracksLiveness());
if (!YamlMF.TracksRegLiveness)
RegInfo.invalidateLiveness();
RegInfo.enableSubRegLiveness(YamlMF.TracksSubRegLiveness);
SMDiagnostic Error;
// Parse the virtual register information.
for (const auto &VReg : YamlMF.VirtualRegisters) {
unsigned Reg;
if (StringRef(VReg.Class.Value).equals("_")) {
// This is a generic virtual register.
// The size will be set appropriately when we reach the definition.
Reg = RegInfo.createGenericVirtualRegister(/*Size*/ 1);
} else {
const auto *RC = getRegClass(MF, VReg.Class.Value);
if (!RC)
return error(VReg.Class.SourceRange.Start,
Twine("use of undefined register class '") +
VReg.Class.Value + "'");
Reg = RegInfo.createVirtualRegister(RC);
}
if (!PFS.VirtualRegisterSlots.insert(std::make_pair(VReg.ID.Value, Reg))
.second)
return error(VReg.ID.SourceRange.Start,
Twine("redefinition of virtual register '%") +
Twine(VReg.ID.Value) + "'");
if (!VReg.PreferredRegister.Value.empty()) {
unsigned PreferredReg = 0;
if (parseNamedRegisterReference(PreferredReg, SM, MF,
VReg.PreferredRegister.Value, PFS,
IRSlots, Error))
return error(Error, VReg.PreferredRegister.SourceRange);
RegInfo.setSimpleHint(Reg, PreferredReg);
}
}
// Parse the liveins.
for (const auto &LiveIn : YamlMF.LiveIns) {
unsigned Reg = 0;
if (parseNamedRegisterReference(Reg, SM, MF, LiveIn.Register.Value, PFS,
IRSlots, Error))
return error(Error, LiveIn.Register.SourceRange);
unsigned VReg = 0;
if (!LiveIn.VirtualRegister.Value.empty()) {
if (parseVirtualRegisterReference(
VReg, SM, MF, LiveIn.VirtualRegister.Value, PFS, IRSlots, Error))
return error(Error, LiveIn.VirtualRegister.SourceRange);
}
RegInfo.addLiveIn(Reg, VReg);
}
// Parse the callee saved register mask.
BitVector CalleeSavedRegisterMask(RegInfo.getUsedPhysRegsMask().size());
if (!YamlMF.CalleeSavedRegisters)
return false;
for (const auto &RegSource : YamlMF.CalleeSavedRegisters.getValue()) {
unsigned Reg = 0;
if (parseNamedRegisterReference(Reg, SM, MF, RegSource.Value, PFS, IRSlots,
Error))
return error(Error, RegSource.SourceRange);
CalleeSavedRegisterMask[Reg] = true;
}
RegInfo.setUsedPhysRegMask(CalleeSavedRegisterMask.flip());
return false;
}
void MIRParserImpl::inferRegisterInfo(MachineFunction &MF,
const yaml::MachineFunction &YamlMF) {
if (YamlMF.CalleeSavedRegisters)
return;
for (const MachineBasicBlock &MBB : MF) {
for (const MachineInstr &MI : MBB) {
for (const MachineOperand &MO : MI.operands()) {
if (!MO.isRegMask())
continue;
MF.getRegInfo().addPhysRegsUsedFromRegMask(MO.getRegMask());
}
}
}
}
bool MIRParserImpl::initializeFrameInfo(MachineFunction &MF,
const yaml::MachineFunction &YamlMF,
PerFunctionMIParsingState &PFS) {
MachineFrameInfo &MFI = *MF.getFrameInfo();
const Function &F = *MF.getFunction();
const yaml::MachineFrameInfo &YamlMFI = YamlMF.FrameInfo;
MFI.setFrameAddressIsTaken(YamlMFI.IsFrameAddressTaken);
MFI.setReturnAddressIsTaken(YamlMFI.IsReturnAddressTaken);
MFI.setHasStackMap(YamlMFI.HasStackMap);
MFI.setHasPatchPoint(YamlMFI.HasPatchPoint);
MFI.setStackSize(YamlMFI.StackSize);
MFI.setOffsetAdjustment(YamlMFI.OffsetAdjustment);
if (YamlMFI.MaxAlignment)
MFI.ensureMaxAlignment(YamlMFI.MaxAlignment);
MFI.setAdjustsStack(YamlMFI.AdjustsStack);
MFI.setHasCalls(YamlMFI.HasCalls);
MFI.setMaxCallFrameSize(YamlMFI.MaxCallFrameSize);
MFI.setHasOpaqueSPAdjustment(YamlMFI.HasOpaqueSPAdjustment);
MFI.setHasVAStart(YamlMFI.HasVAStart);
MFI.setHasMustTailInVarArgFunc(YamlMFI.HasMustTailInVarArgFunc);
if (!YamlMFI.SavePoint.Value.empty()) {
MachineBasicBlock *MBB = nullptr;
if (parseMBBReference(MBB, YamlMFI.SavePoint, MF, PFS))
return true;
MFI.setSavePoint(MBB);
}
if (!YamlMFI.RestorePoint.Value.empty()) {
MachineBasicBlock *MBB = nullptr;
if (parseMBBReference(MBB, YamlMFI.RestorePoint, MF, PFS))
return true;
MFI.setRestorePoint(MBB);
}
std::vector<CalleeSavedInfo> CSIInfo;
// Initialize the fixed frame objects.
for (const auto &Object : YamlMF.FixedStackObjects) {
int ObjectIdx;
if (Object.Type != yaml::FixedMachineStackObject::SpillSlot)
ObjectIdx = MFI.CreateFixedObject(Object.Size, Object.Offset,
Object.IsImmutable, Object.IsAliased);
else
ObjectIdx = MFI.CreateFixedSpillStackObject(Object.Size, Object.Offset);
MFI.setObjectAlignment(ObjectIdx, Object.Alignment);
if (!PFS.FixedStackObjectSlots.insert(std::make_pair(Object.ID.Value,
ObjectIdx))
.second)
return error(Object.ID.SourceRange.Start,
Twine("redefinition of fixed stack object '%fixed-stack.") +
Twine(Object.ID.Value) + "'");
if (parseCalleeSavedRegister(MF, PFS, CSIInfo, Object.CalleeSavedRegister,
ObjectIdx))
return true;
}
// Initialize the ordinary frame objects.
for (const auto &Object : YamlMF.StackObjects) {
int ObjectIdx;
const AllocaInst *Alloca = nullptr;
const yaml::StringValue &Name = Object.Name;
if (!Name.Value.empty()) {
Alloca = dyn_cast_or_null<AllocaInst>(
F.getValueSymbolTable().lookup(Name.Value));
if (!Alloca)
return error(Name.SourceRange.Start,
"alloca instruction named '" + Name.Value +
"' isn't defined in the function '" + F.getName() +
"'");
}
if (Object.Type == yaml::MachineStackObject::VariableSized)
ObjectIdx = MFI.CreateVariableSizedObject(Object.Alignment, Alloca);
else
ObjectIdx = MFI.CreateStackObject(
Object.Size, Object.Alignment,
Object.Type == yaml::MachineStackObject::SpillSlot, Alloca);
MFI.setObjectOffset(ObjectIdx, Object.Offset);
if (!PFS.StackObjectSlots.insert(std::make_pair(Object.ID.Value, ObjectIdx))
.second)
return error(Object.ID.SourceRange.Start,
Twine("redefinition of stack object '%stack.") +
Twine(Object.ID.Value) + "'");
if (parseCalleeSavedRegister(MF, PFS, CSIInfo, Object.CalleeSavedRegister,
ObjectIdx))
return true;
if (Object.LocalOffset)
MFI.mapLocalFrameObject(ObjectIdx, Object.LocalOffset.getValue());
if (parseStackObjectsDebugInfo(MF, PFS, Object, ObjectIdx))
return true;
}
MFI.setCalleeSavedInfo(CSIInfo);
if (!CSIInfo.empty())
MFI.setCalleeSavedInfoValid(true);
// Initialize the various stack object references after initializing the
// stack objects.
if (!YamlMFI.StackProtector.Value.empty()) {
SMDiagnostic Error;
int FI;
if (parseStackObjectReference(FI, SM, MF, YamlMFI.StackProtector.Value, PFS,
IRSlots, Error))
return error(Error, YamlMFI.StackProtector.SourceRange);
MFI.setStackProtectorIndex(FI);
}
return false;
}
bool MIRParserImpl::parseCalleeSavedRegister(
MachineFunction &MF, PerFunctionMIParsingState &PFS,
std::vector<CalleeSavedInfo> &CSIInfo,
const yaml::StringValue &RegisterSource, int FrameIdx) {
if (RegisterSource.Value.empty())
return false;
unsigned Reg = 0;
SMDiagnostic Error;
if (parseNamedRegisterReference(Reg, SM, MF, RegisterSource.Value, PFS,
IRSlots, Error))
return error(Error, RegisterSource.SourceRange);
CSIInfo.push_back(CalleeSavedInfo(Reg, FrameIdx));
return false;
}
/// Verify that given node is of a certain type. Return true on error.
template <typename T>
static bool typecheckMDNode(T *&Result, MDNode *Node,
const yaml::StringValue &Source,
StringRef TypeString, MIRParserImpl &Parser) {
if (!Node)
return false;
Result = dyn_cast<T>(Node);
if (!Result)
return Parser.error(Source.SourceRange.Start,
"expected a reference to a '" + TypeString +
"' metadata node");
return false;
}
bool MIRParserImpl::parseStackObjectsDebugInfo(
MachineFunction &MF, PerFunctionMIParsingState &PFS,
const yaml::MachineStackObject &Object, int FrameIdx) {
// Debug information can only be attached to stack objects; Fixed stack
// objects aren't supported.
assert(FrameIdx >= 0 && "Expected a stack object frame index");
MDNode *Var = nullptr, *Expr = nullptr, *Loc = nullptr;
if (parseMDNode(Var, Object.DebugVar, MF, PFS) ||
parseMDNode(Expr, Object.DebugExpr, MF, PFS) ||
parseMDNode(Loc, Object.DebugLoc, MF, PFS))
return true;
if (!Var && !Expr && !Loc)
return false;
DILocalVariable *DIVar = nullptr;
DIExpression *DIExpr = nullptr;
DILocation *DILoc = nullptr;
if (typecheckMDNode(DIVar, Var, Object.DebugVar, "DILocalVariable", *this) ||
typecheckMDNode(DIExpr, Expr, Object.DebugExpr, "DIExpression", *this) ||
typecheckMDNode(DILoc, Loc, Object.DebugLoc, "DILocation", *this))
return true;
MF.getMMI().setVariableDbgInfo(DIVar, DIExpr, unsigned(FrameIdx), DILoc);
return false;
}
bool MIRParserImpl::parseMDNode(MDNode *&Node, const yaml::StringValue &Source,
MachineFunction &MF,
const PerFunctionMIParsingState &PFS) {
if (Source.Value.empty())
return false;
SMDiagnostic Error;
if (llvm::parseMDNode(Node, SM, MF, Source.Value, PFS, IRSlots, Error))
return error(Error, Source.SourceRange);
return false;
}
bool MIRParserImpl::initializeConstantPool(
MachineConstantPool &ConstantPool, const yaml::MachineFunction &YamlMF,
const MachineFunction &MF,
DenseMap<unsigned, unsigned> &ConstantPoolSlots) {
const auto &M = *MF.getFunction()->getParent();
SMDiagnostic Error;
for (const auto &YamlConstant : YamlMF.Constants) {
const Constant *Value = dyn_cast_or_null<Constant>(
parseConstantValue(YamlConstant.Value.Value, Error, M));
if (!Value)
return error(Error, YamlConstant.Value.SourceRange);
unsigned Alignment =
YamlConstant.Alignment
? YamlConstant.Alignment
: M.getDataLayout().getPrefTypeAlignment(Value->getType());
unsigned Index = ConstantPool.getConstantPoolIndex(Value, Alignment);
if (!ConstantPoolSlots.insert(std::make_pair(YamlConstant.ID.Value, Index))
.second)
return error(YamlConstant.ID.SourceRange.Start,
Twine("redefinition of constant pool item '%const.") +
Twine(YamlConstant.ID.Value) + "'");
}
return false;
}
bool MIRParserImpl::initializeJumpTableInfo(
MachineFunction &MF, const yaml::MachineJumpTable &YamlJTI,
PerFunctionMIParsingState &PFS) {
MachineJumpTableInfo *JTI = MF.getOrCreateJumpTableInfo(YamlJTI.Kind);
for (const auto &Entry : YamlJTI.Entries) {
std::vector<MachineBasicBlock *> Blocks;
for (const auto &MBBSource : Entry.Blocks) {
MachineBasicBlock *MBB = nullptr;
if (parseMBBReference(MBB, MBBSource.Value, MF, PFS))
return true;
Blocks.push_back(MBB);
}
unsigned Index = JTI->createJumpTableIndex(Blocks);
if (!PFS.JumpTableSlots.insert(std::make_pair(Entry.ID.Value, Index))
.second)
return error(Entry.ID.SourceRange.Start,
Twine("redefinition of jump table entry '%jump-table.") +
Twine(Entry.ID.Value) + "'");
}
return false;
}
bool MIRParserImpl::parseMBBReference(MachineBasicBlock *&MBB,
const yaml::StringValue &Source,
MachineFunction &MF,
const PerFunctionMIParsingState &PFS) {
SMDiagnostic Error;
if (llvm::parseMBBReference(MBB, SM, MF, Source.Value, PFS, IRSlots, Error))
return error(Error, Source.SourceRange);
return false;
}
SMDiagnostic MIRParserImpl::diagFromMIStringDiag(const SMDiagnostic &Error,
SMRange SourceRange) {
assert(SourceRange.isValid() && "Invalid source range");
SMLoc Loc = SourceRange.Start;
bool HasQuote = Loc.getPointer() < SourceRange.End.getPointer() &&
*Loc.getPointer() == '\'';
// Translate the location of the error from the location in the MI string to
// the corresponding location in the MIR file.
Loc = Loc.getFromPointer(Loc.getPointer() + Error.getColumnNo() +
(HasQuote ? 1 : 0));
// TODO: Translate any source ranges as well.
return SM.GetMessage(Loc, Error.getKind(), Error.getMessage(), None,
Error.getFixIts());
}
SMDiagnostic MIRParserImpl::diagFromBlockStringDiag(const SMDiagnostic &Error,
SMRange SourceRange) {
assert(SourceRange.isValid());
// Translate the location of the error from the location in the llvm IR string
// to the corresponding location in the MIR file.
auto LineAndColumn = SM.getLineAndColumn(SourceRange.Start);
unsigned Line = LineAndColumn.first + Error.getLineNo() - 1;
unsigned Column = Error.getColumnNo();
StringRef LineStr = Error.getLineContents();
SMLoc Loc = Error.getLoc();
// Get the full line and adjust the column number by taking the indentation of
// LLVM IR into account.
for (line_iterator L(*SM.getMemoryBuffer(SM.getMainFileID()), false), E;
L != E; ++L) {
if (L.line_number() == Line) {
LineStr = *L;
Loc = SMLoc::getFromPointer(LineStr.data());
auto Indent = LineStr.find(Error.getLineContents());
if (Indent != StringRef::npos)
Column += Indent;
break;
}
}
return SMDiagnostic(SM, Loc, Filename, Line, Column, Error.getKind(),
Error.getMessage(), LineStr, Error.getRanges(),
Error.getFixIts());
}
void MIRParserImpl::initNames2RegClasses(const MachineFunction &MF) {
if (!Names2RegClasses.empty())
return;
const TargetRegisterInfo *TRI = MF.getSubtarget().getRegisterInfo();
for (unsigned I = 0, E = TRI->getNumRegClasses(); I < E; ++I) {
const auto *RC = TRI->getRegClass(I);
Names2RegClasses.insert(
std::make_pair(StringRef(TRI->getRegClassName(RC)).lower(), RC));
}
}
const TargetRegisterClass *MIRParserImpl::getRegClass(const MachineFunction &MF,
StringRef Name) {
initNames2RegClasses(MF);
auto RegClassInfo = Names2RegClasses.find(Name);
if (RegClassInfo == Names2RegClasses.end())
return nullptr;
return RegClassInfo->getValue();
}
MIRParser::MIRParser(std::unique_ptr<MIRParserImpl> Impl)
: Impl(std::move(Impl)) {}
MIRParser::~MIRParser() {}
std::unique_ptr<Module> MIRParser::parseLLVMModule() { return Impl->parse(); }
bool MIRParser::initializeMachineFunction(MachineFunction &MF) {
return Impl->initializeMachineFunction(MF);
}
std::unique_ptr<MIRParser> llvm::createMIRParserFromFile(StringRef Filename,
SMDiagnostic &Error,
LLVMContext &Context) {
auto FileOrErr = MemoryBuffer::getFile(Filename);
if (std::error_code EC = FileOrErr.getError()) {
Error = SMDiagnostic(Filename, SourceMgr::DK_Error,
"Could not open input file: " + EC.message());
return nullptr;
}
return createMIRParser(std::move(FileOrErr.get()), Context);
}
std::unique_ptr<MIRParser>
llvm::createMIRParser(std::unique_ptr<MemoryBuffer> Contents,
LLVMContext &Context) {
auto Filename = Contents->getBufferIdentifier();
return llvm::make_unique<MIRParser>(
llvm::make_unique<MIRParserImpl>(std::move(Contents), Filename, Context));
}
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