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9b62cf6143
teak-llvm/llvm/lib/CodeGen/MIRParser/MIRParser.cpp
Alex Lorenz 9b62cf6143 MIR Parser: Rename the method 'diagFromLLVMAssemblyDiag'. NFC. 
This commit renames the method 'diagFromLLVMAssemblyDiag' to
'diagFromBlockStringDiag'. This method will be used when converting diagnostics
from other YAML block strings, and not just the LLVM module block string, so
the new name should reflect that.

llvm-svn: 244943
2015-08-13 20:30:11 +00:00

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28 KiB
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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/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);
/// Initialize the machine basic block using it's YAML representation.
///
/// Return true if an error occurred.
bool initializeMachineBasicBlock(MachineFunction &MF, MachineBasicBlock &MBB,
const yaml::MachineBasicBlock &YamlMBB,
const PerFunctionMIParsingState &PFS);
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 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 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);
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;
}
const auto &F = *MF.getFunction();
for (const auto &YamlMBB : YamlMF.BasicBlocks) {
const BasicBlock *BB = nullptr;
const yaml::StringValue &Name = YamlMBB.Name;
const yaml::StringValue &IRBlock = YamlMBB.IRBlock;
if (!Name.Value.empty()) {
BB = dyn_cast_or_null<BasicBlock>(
F.getValueSymbolTable().lookup(Name.Value));
if (!BB)
return error(Name.SourceRange.Start,
Twine("basic block '") + Name.Value +
"' is not defined in the function '" + MF.getName() +
"'");
}
if (!IRBlock.Value.empty()) {
// TODO: Report an error when both name and ir block are specified.
SMDiagnostic Error;
if (parseIRBlockReference(BB, SM, MF, IRBlock.Value, PFS, IRSlots, Error))
return error(Error, IRBlock.SourceRange);
}
auto *MBB = MF.CreateMachineBasicBlock(BB);
MF.insert(MF.end(), MBB);
bool WasInserted =
PFS.MBBSlots.insert(std::make_pair(YamlMBB.ID, MBB)).second;
if (!WasInserted)
return error(Twine("redefinition of machine basic block with id #") +
Twine(YamlMBB.ID));
}
if (YamlMF.BasicBlocks.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;
// Initialize the machine basic blocks after creating them all so that the
// machine instructions parser can resolve the MBB references.
unsigned I = 0;
for (const auto &YamlMBB : YamlMF.BasicBlocks) {
if (initializeMachineBasicBlock(MF, *MF.getBlockNumbered(I++), YamlMBB,
PFS))
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::initializeMachineBasicBlock(
MachineFunction &MF, MachineBasicBlock &MBB,
const yaml::MachineBasicBlock &YamlMBB,
const PerFunctionMIParsingState &PFS) {
MBB.setAlignment(YamlMBB.Alignment);
if (YamlMBB.AddressTaken)
MBB.setHasAddressTaken();
MBB.setIsLandingPad(YamlMBB.IsLandingPad);
SMDiagnostic Error;
// Parse the successors.
const auto &Weights = YamlMBB.SuccessorWeights;
bool HasWeights = !Weights.empty();
if (HasWeights && Weights.size() != YamlMBB.Successors.size()) {
bool IsFew = Weights.size() < YamlMBB.Successors.size();
return error(IsFew ? Weights.back().SourceRange.End
: Weights[YamlMBB.Successors.size()].SourceRange.Start,
Twine("too ") + (IsFew ? "few" : "many") +
" successor weights, expected " +
Twine(YamlMBB.Successors.size()) + ", have " +
Twine(Weights.size()));
}
size_t SuccessorIndex = 0;
for (const auto &MBBSource : YamlMBB.Successors) {
MachineBasicBlock *SuccMBB = nullptr;
if (parseMBBReference(SuccMBB, MBBSource, MF, PFS))
return true;
// TODO: Report an error when adding the same successor more than once.
MBB.addSuccessor(SuccMBB, HasWeights ? Weights[SuccessorIndex++].Value : 0);
}
// Parse the liveins.
for (const auto &LiveInSource : YamlMBB.LiveIns) {
unsigned Reg = 0;
if (parseNamedRegisterReference(Reg, SM, MF, LiveInSource.Value, PFS,
IRSlots, Error))
return error(Error, LiveInSource.SourceRange);
MBB.addLiveIn(Reg);
}
// Parse the instructions.
for (const auto &MISource : YamlMBB.Instructions) {
MachineInstr *MI = nullptr;
if (parseMachineInstr(MI, SM, MF, MISource.Value, PFS, IRSlots, Error))
return error(Error, MISource.SourceRange);
MBB.insert(MBB.end(), MI);
}
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) {
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 + "'");
unsigned 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;
}
MFI.setCalleeSavedInfo(CSIInfo);
if (!CSIInfo.empty())
MFI.setCalleeSavedInfoValid(true);
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;
}
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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