RPCS3/llvm-mirror
1
0
Fork 0
mirror of https://github.com/RPCS3/llvm-mirror.git synced 2024-12-28 06:27:16 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity
2ab62b9a92
llvm-mirror/lib/CodeGen/MachineModuleInfo.cpp
Bill Wendling 2ab62b9a92 Refactor the DebugInfoDesc stuff out of the MachineModuleInfo file. Clean up 
some uses of std::vector, where it's return std::vector by value. Yuck!

llvm-svn: 52800
2008-06-27 00:09:40 +00:00

1192 lines
38 KiB
C++
Raw Blame History

//===-- llvm/CodeGen/MachineModuleInfo.cpp ----------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "llvm/CodeGen/MachineModuleInfo.h"
#include "llvm/Constants.h"
#include "llvm/Analysis/ValueTracking.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineLocation.h"
#include "llvm/CodeGen/MachineDebugInfoDesc.h"
#include "llvm/Target/TargetInstrInfo.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Target/TargetOptions.h"
#include "llvm/DerivedTypes.h"
#include "llvm/GlobalVariable.h"
#include "llvm/Intrinsics.h"
#include "llvm/Instructions.h"
#include "llvm/Module.h"
#include "llvm/Support/Dwarf.h"
#include "llvm/Support/Streams.h"
using namespace llvm;
using namespace llvm::dwarf;
// Handle the Pass registration stuff necessary to use TargetData's.
static RegisterPass<MachineModuleInfo>
X("machinemoduleinfo", "Module Information");
char MachineModuleInfo::ID = 0;
//===----------------------------------------------------------------------===//
/// getGlobalVariablesUsing - Return all of the GlobalVariables which have the
/// specified value in their initializer somewhere.
static void
getGlobalVariablesUsing(Value *V, std::vector<GlobalVariable*> &Result) {
// Scan though value users.
for (Value::use_iterator I = V->use_begin(), E = V->use_end(); I != E; ++I) {
if (GlobalVariable *GV = dyn_cast<GlobalVariable>(*I)) {
// If the user is a GlobalVariable then add to result.
Result.push_back(GV);
} else if (Constant *C = dyn_cast<Constant>(*I)) {
// If the user is a constant variable then scan its users
getGlobalVariablesUsing(C, Result);
}
}
}
/// getGlobalVariablesUsing - Return all of the GlobalVariables that use the
/// named GlobalVariable.
static void
getGlobalVariablesUsing(Module &M, const std::string &RootName,
std::vector<GlobalVariable*> &Result) {
std::vector<const Type*> FieldTypes;
FieldTypes.push_back(Type::Int32Ty);
FieldTypes.push_back(Type::Int32Ty);
// Get the GlobalVariable root.
GlobalVariable *UseRoot = M.getGlobalVariable(RootName,
StructType::get(FieldTypes));
// If present and linkonce then scan for users.
if (UseRoot && UseRoot->hasLinkOnceLinkage())
getGlobalVariablesUsing(UseRoot, Result);
}
/// isStringValue - Return true if the given value can be coerced to a string.
///
static bool isStringValue(Value *V) {
if (GlobalVariable *GV = dyn_cast<GlobalVariable>(V)) {
if (GV->hasInitializer() && isa<ConstantArray>(GV->getInitializer())) {
ConstantArray *Init = cast<ConstantArray>(GV->getInitializer());
return Init->isString();
}
} else if (Constant *C = dyn_cast<Constant>(V)) {
if (GlobalValue *GV = dyn_cast<GlobalValue>(C))
return isStringValue(GV);
else if (ConstantExpr *CE = dyn_cast<ConstantExpr>(C)) {
if (CE->getOpcode() == Instruction::GetElementPtr) {
if (CE->getNumOperands() == 3 &&
cast<Constant>(CE->getOperand(1))->isNullValue() &&
isa<ConstantInt>(CE->getOperand(2))) {
return isStringValue(CE->getOperand(0));
}
}
}
}
return false;
}
/// getGlobalVariable - Return either a direct or cast Global value.
///
static GlobalVariable *getGlobalVariable(Value *V) {
if (GlobalVariable *GV = dyn_cast<GlobalVariable>(V)) {
return GV;
} else if (ConstantExpr *CE = dyn_cast<ConstantExpr>(V)) {
if (CE->getOpcode() == Instruction::BitCast) {
return dyn_cast<GlobalVariable>(CE->getOperand(0));
} else if (CE->getOpcode() == Instruction::GetElementPtr) {
for (unsigned int i=1; i<CE->getNumOperands(); i++) {
if (!CE->getOperand(i)->isNullValue())
return NULL;
}
return dyn_cast<GlobalVariable>(CE->getOperand(0));
}
}
return NULL;
}
/// isGlobalVariable - Return true if the given value can be coerced to a
/// GlobalVariable.
static bool isGlobalVariable(Value *V) {
if (isa<GlobalVariable>(V) || isa<ConstantPointerNull>(V)) {
return true;
} else if (ConstantExpr *CE = dyn_cast<ConstantExpr>(V)) {
if (CE->getOpcode() == Instruction::BitCast) {
return isa<GlobalVariable>(CE->getOperand(0));
} else if (CE->getOpcode() == Instruction::GetElementPtr) {
for (unsigned int i=1; i<CE->getNumOperands(); i++) {
if (!CE->getOperand(i)->isNullValue())
return false;
}
return isa<GlobalVariable>(CE->getOperand(0));
}
}
return false;
}
//===----------------------------------------------------------------------===//
/// ApplyToFields - Target the visitor to each field of the debug information
/// descriptor.
void DIVisitor::ApplyToFields(DebugInfoDesc *DD) {
DD->ApplyToFields(this);
}
namespace {
//===----------------------------------------------------------------------===//
/// DICountVisitor - This DIVisitor counts all the fields in the supplied debug
/// the supplied DebugInfoDesc.
class DICountVisitor : public DIVisitor {
private:
unsigned Count; // Running count of fields.
public:
DICountVisitor() : DIVisitor(), Count(0) {}
// Accessors.
unsigned getCount() const { return Count; }
/// Apply - Count each of the fields.
///
virtual void Apply(int &Field) { ++Count; }
virtual void Apply(unsigned &Field) { ++Count; }
virtual void Apply(int64_t &Field) { ++Count; }
virtual void Apply(uint64_t &Field) { ++Count; }
virtual void Apply(bool &Field) { ++Count; }
virtual void Apply(std::string &Field) { ++Count; }
virtual void Apply(DebugInfoDesc *&Field) { ++Count; }
virtual void Apply(GlobalVariable *&Field) { ++Count; }
virtual void Apply(std::vector<DebugInfoDesc *> &Field) {
++Count;
}
};
//===----------------------------------------------------------------------===//
/// DIDeserializeVisitor - This DIVisitor deserializes all the fields in the
/// supplied DebugInfoDesc.
class DIDeserializeVisitor : public DIVisitor {
private:
DIDeserializer &DR; // Active deserializer.
unsigned I; // Current operand index.
ConstantStruct *CI; // GlobalVariable constant initializer.
public:
DIDeserializeVisitor(DIDeserializer &D, GlobalVariable *GV)
: DIVisitor()
, DR(D)
, I(0)
, CI(cast<ConstantStruct>(GV->getInitializer()))
{}
/// Apply - Set the value of each of the fields.
///
virtual void Apply(int &Field) {
Constant *C = CI->getOperand(I++);
Field = cast<ConstantInt>(C)->getSExtValue();
}
virtual void Apply(unsigned &Field) {
Constant *C = CI->getOperand(I++);
Field = cast<ConstantInt>(C)->getZExtValue();
}
virtual void Apply(int64_t &Field) {
Constant *C = CI->getOperand(I++);
Field = cast<ConstantInt>(C)->getSExtValue();
}
virtual void Apply(uint64_t &Field) {
Constant *C = CI->getOperand(I++);
Field = cast<ConstantInt>(C)->getZExtValue();
}
virtual void Apply(bool &Field) {
Constant *C = CI->getOperand(I++);
Field = cast<ConstantInt>(C)->getZExtValue();
}
virtual void Apply(std::string &Field) {
Constant *C = CI->getOperand(I++);
// Fills in the string if it succeeds
if (!GetConstantStringInfo(C, Field))
Field.clear();
}
virtual void Apply(DebugInfoDesc *&Field) {
Constant *C = CI->getOperand(I++);
Field = DR.Deserialize(C);
}
virtual void Apply(GlobalVariable *&Field) {
Constant *C = CI->getOperand(I++);
Field = getGlobalVariable(C);
}
virtual void Apply(std::vector<DebugInfoDesc *> &Field) {
Field.resize(0);
Constant *C = CI->getOperand(I++);
GlobalVariable *GV = getGlobalVariable(C);
if (GV->hasInitializer()) {
if (ConstantArray *CA = dyn_cast<ConstantArray>(GV->getInitializer())) {
for (unsigned i = 0, N = CA->getNumOperands(); i < N; ++i) {
GlobalVariable *GVE = getGlobalVariable(CA->getOperand(i));
DebugInfoDesc *DE = DR.Deserialize(GVE);
Field.push_back(DE);
}
} else if (GV->getInitializer()->isNullValue()) {
if (const ArrayType *T =
dyn_cast<ArrayType>(GV->getType()->getElementType())) {
Field.resize(T->getNumElements());
}
}
}
}
};
//===----------------------------------------------------------------------===//
/// DISerializeVisitor - This DIVisitor serializes all the fields in
/// the supplied DebugInfoDesc.
class DISerializeVisitor : public DIVisitor {
private:
DISerializer &SR; // Active serializer.
std::vector<Constant*> &Elements; // Element accumulator.
public:
DISerializeVisitor(DISerializer &S, std::vector<Constant*> &E)
: DIVisitor()
, SR(S)
, Elements(E)
{}
/// Apply - Set the value of each of the fields.
///
virtual void Apply(int &Field) {
Elements.push_back(ConstantInt::get(Type::Int32Ty, int32_t(Field)));
}
virtual void Apply(unsigned &Field) {
Elements.push_back(ConstantInt::get(Type::Int32Ty, uint32_t(Field)));
}
virtual void Apply(int64_t &Field) {
Elements.push_back(ConstantInt::get(Type::Int64Ty, int64_t(Field)));
}
virtual void Apply(uint64_t &Field) {
Elements.push_back(ConstantInt::get(Type::Int64Ty, uint64_t(Field)));
}
virtual void Apply(bool &Field) {
Elements.push_back(ConstantInt::get(Type::Int1Ty, Field));
}
virtual void Apply(std::string &Field) {
Elements.push_back(SR.getString(Field));
}
virtual void Apply(DebugInfoDesc *&Field) {
GlobalVariable *GV = NULL;
// If non-NULL then convert to global.
if (Field) GV = SR.Serialize(Field);
// FIXME - At some point should use specific type.
const PointerType *EmptyTy = SR.getEmptyStructPtrType();
if (GV) {
// Set to pointer to global.
Elements.push_back(ConstantExpr::getBitCast(GV, EmptyTy));
} else {
// Use NULL.
Elements.push_back(ConstantPointerNull::get(EmptyTy));
}
}
virtual void Apply(GlobalVariable *&Field) {
const PointerType *EmptyTy = SR.getEmptyStructPtrType();
if (Field) {
Elements.push_back(ConstantExpr::getBitCast(Field, EmptyTy));
} else {
Elements.push_back(ConstantPointerNull::get(EmptyTy));
}
}
virtual void Apply(std::vector<DebugInfoDesc *> &Field) {
const PointerType *EmptyTy = SR.getEmptyStructPtrType();
unsigned N = Field.size();
ArrayType *AT = ArrayType::get(EmptyTy, N);
std::vector<Constant *> ArrayElements;
for (unsigned i = 0, N = Field.size(); i < N; ++i) {
if (DebugInfoDesc *Element = Field[i]) {
GlobalVariable *GVE = SR.Serialize(Element);
Constant *CE = ConstantExpr::getBitCast(GVE, EmptyTy);
ArrayElements.push_back(cast<Constant>(CE));
} else {
ArrayElements.push_back(ConstantPointerNull::get(EmptyTy));
}
}
Constant *CA = ConstantArray::get(AT, ArrayElements);
GlobalVariable *CAGV = new GlobalVariable(AT, true,
GlobalValue::InternalLinkage,
CA, "llvm.dbg.array",
SR.getModule());
CAGV->setSection("llvm.metadata");
Constant *CAE = ConstantExpr::getBitCast(CAGV, EmptyTy);
Elements.push_back(CAE);
}
};
//===----------------------------------------------------------------------===//
/// DIGetTypesVisitor - This DIVisitor gathers all the field types in
/// the supplied DebugInfoDesc.
class DIGetTypesVisitor : public DIVisitor {
private:
DISerializer &SR; // Active serializer.
std::vector<const Type*> &Fields; // Type accumulator.
public:
DIGetTypesVisitor(DISerializer &S, std::vector<const Type*> &F)
: DIVisitor()
, SR(S)
, Fields(F)
{}
/// Apply - Set the value of each of the fields.
///
virtual void Apply(int &Field) {
Fields.push_back(Type::Int32Ty);
}
virtual void Apply(unsigned &Field) {
Fields.push_back(Type::Int32Ty);
}
virtual void Apply(int64_t &Field) {
Fields.push_back(Type::Int64Ty);
}
virtual void Apply(uint64_t &Field) {
Fields.push_back(Type::Int64Ty);
}
virtual void Apply(bool &Field) {
Fields.push_back(Type::Int1Ty);
}
virtual void Apply(std::string &Field) {
Fields.push_back(SR.getStrPtrType());
}
virtual void Apply(DebugInfoDesc *&Field) {
// FIXME - At some point should use specific type.
const PointerType *EmptyTy = SR.getEmptyStructPtrType();
Fields.push_back(EmptyTy);
}
virtual void Apply(GlobalVariable *&Field) {
const PointerType *EmptyTy = SR.getEmptyStructPtrType();
Fields.push_back(EmptyTy);
}
virtual void Apply(std::vector<DebugInfoDesc *> &Field) {
const PointerType *EmptyTy = SR.getEmptyStructPtrType();
Fields.push_back(EmptyTy);
}
};
//===----------------------------------------------------------------------===//
/// DIVerifyVisitor - This DIVisitor verifies all the field types against
/// a constant initializer.
class DIVerifyVisitor : public DIVisitor {
private:
DIVerifier &VR; // Active verifier.
bool IsValid; // Validity status.
unsigned I; // Current operand index.
ConstantStruct *CI; // GlobalVariable constant initializer.
public:
DIVerifyVisitor(DIVerifier &V, GlobalVariable *GV)
: DIVisitor()
, VR(V)
, IsValid(true)
, I(0)
, CI(cast<ConstantStruct>(GV->getInitializer()))
{
}
// Accessors.
bool isValid() const { return IsValid; }
/// Apply - Set the value of each of the fields.
///
virtual void Apply(int &Field) {
Constant *C = CI->getOperand(I++);
IsValid = IsValid && isa<ConstantInt>(C);
}
virtual void Apply(unsigned &Field) {
Constant *C = CI->getOperand(I++);
IsValid = IsValid && isa<ConstantInt>(C);
}
virtual void Apply(int64_t &Field) {
Constant *C = CI->getOperand(I++);
IsValid = IsValid && isa<ConstantInt>(C);
}
virtual void Apply(uint64_t &Field) {
Constant *C = CI->getOperand(I++);
IsValid = IsValid && isa<ConstantInt>(C);
}
virtual void Apply(bool &Field) {
Constant *C = CI->getOperand(I++);
IsValid = IsValid && isa<ConstantInt>(C) && C->getType() == Type::Int1Ty;
}
virtual void Apply(std::string &Field) {
Constant *C = CI->getOperand(I++);
IsValid = IsValid &&
(!C || isStringValue(C) || C->isNullValue());
}
virtual void Apply(DebugInfoDesc *&Field) {
// FIXME - Prepare the correct descriptor.
Constant *C = CI->getOperand(I++);
IsValid = IsValid && isGlobalVariable(C);
}
virtual void Apply(GlobalVariable *&Field) {
Constant *C = CI->getOperand(I++);
IsValid = IsValid && isGlobalVariable(C);
}
virtual void Apply(std::vector<DebugInfoDesc *> &Field) {
Constant *C = CI->getOperand(I++);
IsValid = IsValid && isGlobalVariable(C);
if (!IsValid) return;
GlobalVariable *GV = getGlobalVariable(C);
IsValid = IsValid && GV && GV->hasInitializer();
if (!IsValid) return;
ConstantArray *CA = dyn_cast<ConstantArray>(GV->getInitializer());
IsValid = IsValid && CA;
if (!IsValid) return;
for (unsigned i = 0, N = CA->getNumOperands(); IsValid && i < N; ++i) {
IsValid = IsValid && isGlobalVariable(CA->getOperand(i));
if (!IsValid) return;
GlobalVariable *GVE = getGlobalVariable(CA->getOperand(i));
VR.Verify(GVE);
}
}
};
}
//===----------------------------------------------------------------------===//
DebugInfoDesc *DIDeserializer::Deserialize(Value *V) {
return Deserialize(getGlobalVariable(V));
}
DebugInfoDesc *DIDeserializer::Deserialize(GlobalVariable *GV) {
// Handle NULL.
if (!GV) return NULL;
// Check to see if it has been already deserialized.
DebugInfoDesc *&Slot = GlobalDescs[GV];
if (Slot) return Slot;
// Get the Tag from the global.
unsigned Tag = DebugInfoDesc::TagFromGlobal(GV);
// Create an empty instance of the correct sort.
Slot = DebugInfoDesc::DescFactory(Tag);
// If not a user defined descriptor.
if (Slot) {
// Deserialize the fields.
DIDeserializeVisitor DRAM(*this, GV);
DRAM.ApplyToFields(Slot);
}
return Slot;
}
//===----------------------------------------------------------------------===//
/// getStrPtrType - Return a "sbyte *" type.
///
const PointerType *DISerializer::getStrPtrType() {
// If not already defined.
if (!StrPtrTy) {
// Construct the pointer to signed bytes.
StrPtrTy = PointerType::getUnqual(Type::Int8Ty);
}
return StrPtrTy;
}
/// getEmptyStructPtrType - Return a "{ }*" type.
///
const PointerType *DISerializer::getEmptyStructPtrType() {
// If not already defined.
if (!EmptyStructPtrTy) {
// Construct the empty structure type.
const StructType *EmptyStructTy =
StructType::get(std::vector<const Type*>());
// Construct the pointer to empty structure type.
EmptyStructPtrTy = PointerType::getUnqual(EmptyStructTy);
}
return EmptyStructPtrTy;
}
/// getTagType - Return the type describing the specified descriptor (via tag.)
///
const StructType *DISerializer::getTagType(DebugInfoDesc *DD) {
// Attempt to get the previously defined type.
StructType *&Ty = TagTypes[DD->getTag()];
// If not already defined.
if (!Ty) {
// Set up fields vector.
std::vector<const Type*> Fields;
// Get types of fields.
DIGetTypesVisitor GTAM(*this, Fields);
GTAM.ApplyToFields(DD);
// Construct structured type.
Ty = StructType::get(Fields);
// Register type name with module.
M->addTypeName(DD->getTypeString(), Ty);
}
return Ty;
}
/// getString - Construct the string as constant string global.
///
Constant *DISerializer::getString(const std::string &String) {
// Check string cache for previous edition.
Constant *&Slot = StringCache[String];
// Return Constant if previously defined.
if (Slot) return Slot;
// If empty string then use a sbyte* null instead.
if (String.empty()) {
Slot = ConstantPointerNull::get(getStrPtrType());
} else {
// Construct string as an llvm constant.
Constant *ConstStr = ConstantArray::get(String);
// Otherwise create and return a new string global.
GlobalVariable *StrGV = new GlobalVariable(ConstStr->getType(), true,
GlobalVariable::InternalLinkage,
ConstStr, ".str", M);
StrGV->setSection("llvm.metadata");
// Convert to generic string pointer.
Slot = ConstantExpr::getBitCast(StrGV, getStrPtrType());
}
return Slot;
}
/// Serialize - Recursively cast the specified descriptor into a GlobalVariable
/// so that it can be serialized to a .bc or .ll file.
GlobalVariable *DISerializer::Serialize(DebugInfoDesc *DD) {
// Check if the DebugInfoDesc is already in the map.
GlobalVariable *&Slot = DescGlobals[DD];
// See if DebugInfoDesc exists, if so return prior GlobalVariable.
if (Slot) return Slot;
// Get the type associated with the Tag.
const StructType *Ty = getTagType(DD);
// Create the GlobalVariable early to prevent infinite recursion.
GlobalVariable *GV = new GlobalVariable(Ty, true, DD->getLinkage(),
NULL, DD->getDescString(), M);
GV->setSection("llvm.metadata");
// Insert new GlobalVariable in DescGlobals map.
Slot = GV;
// Set up elements vector
std::vector<Constant*> Elements;
// Add fields.
DISerializeVisitor SRAM(*this, Elements);
SRAM.ApplyToFields(DD);
// Set the globals initializer.
GV->setInitializer(ConstantStruct::get(Ty, Elements));
return GV;
}
/// addDescriptor - Directly connect DD with existing GV.
void DISerializer::addDescriptor(DebugInfoDesc *DD,
GlobalVariable *GV) {
DescGlobals[DD] = GV;
}
//===----------------------------------------------------------------------===//
/// Verify - Return true if the GlobalVariable appears to be a valid
/// serialization of a DebugInfoDesc.
bool DIVerifier::Verify(Value *V) {
return !V || Verify(getGlobalVariable(V));
}
bool DIVerifier::Verify(GlobalVariable *GV) {
// NULLs are valid.
if (!GV) return true;
// Check prior validity.
unsigned &ValiditySlot = Validity[GV];
// If visited before then use old state.
if (ValiditySlot) return ValiditySlot == Valid;
// Assume validity for the time being (recursion.)
ValiditySlot = Valid;
// Make sure the global is internal or link once (anchor.)
if (GV->getLinkage() != GlobalValue::InternalLinkage &&
GV->getLinkage() != GlobalValue::LinkOnceLinkage) {
ValiditySlot = Invalid;
return false;
}
// Get the Tag.
unsigned Tag = DebugInfoDesc::TagFromGlobal(GV);
// Check for user defined descriptors.
if (Tag == DW_TAG_invalid) {
ValiditySlot = Valid;
return true;
}
// Get the Version.
unsigned Version = DebugInfoDesc::VersionFromGlobal(GV);
// Check for version mismatch.
if (Version != LLVMDebugVersion) {
ValiditySlot = Invalid;
return false;
}
// Construct an empty DebugInfoDesc.
DebugInfoDesc *DD = DebugInfoDesc::DescFactory(Tag);
// Allow for user defined descriptors.
if (!DD) return true;
// Get the initializer constant.
ConstantStruct *CI = cast<ConstantStruct>(GV->getInitializer());
// Get the operand count.
unsigned N = CI->getNumOperands();
// Get the field count.
unsigned &CountSlot = Counts[Tag];
if (!CountSlot) {
// Check the operand count to the field count
DICountVisitor CTAM;
CTAM.ApplyToFields(DD);
CountSlot = CTAM.getCount();
}
// Field count must be at most equal operand count.
if (CountSlot > N) {
delete DD;
ValiditySlot = Invalid;
return false;
}
// Check each field for valid type.
DIVerifyVisitor VRAM(*this, GV);
VRAM.ApplyToFields(DD);
// Release empty DebugInfoDesc.
delete DD;
// If fields are not valid.
if (!VRAM.isValid()) {
ValiditySlot = Invalid;
return false;
}
return true;
}
/// isVerified - Return true if the specified GV has already been
/// verified as a debug information descriptor.
bool DIVerifier::isVerified(GlobalVariable *GV) {
unsigned &ValiditySlot = Validity[GV];
if (ValiditySlot) return ValiditySlot == Valid;
return false;
}
//===----------------------------------------------------------------------===//
DebugScope::~DebugScope() {
for (unsigned i = 0, N = Scopes.size(); i < N; ++i) delete Scopes[i];
for (unsigned j = 0, M = Variables.size(); j < M; ++j) delete Variables[j];
}
//===----------------------------------------------------------------------===//
MachineModuleInfo::MachineModuleInfo()
: ImmutablePass((intptr_t)&ID)
, DR()
, VR()
, CompileUnits()
, Directories()
, SourceFiles()
, Lines()
, LabelIDList()
, ScopeMap()
, RootScope(NULL)
, FrameMoves()
, LandingPads()
, Personalities()
, CallsEHReturn(0)
, CallsUnwindInit(0)
{
// Always emit "no personality" info
Personalities.push_back(NULL);
}
MachineModuleInfo::~MachineModuleInfo() {
}
/// doInitialization - Initialize the state for a new module.
///
bool MachineModuleInfo::doInitialization() {
return false;
}
/// doFinalization - Tear down the state after completion of a module.
///
bool MachineModuleInfo::doFinalization() {
return false;
}
/// BeginFunction - Begin gathering function meta information.
///
void MachineModuleInfo::BeginFunction(MachineFunction *MF) {
// Coming soon.
}
/// EndFunction - Discard function meta information.
///
void MachineModuleInfo::EndFunction() {
// Clean up scope information.
if (RootScope) {
delete RootScope;
ScopeMap.clear();
RootScope = NULL;
}
// Clean up line info.
Lines.clear();
// Clean up frame info.
FrameMoves.clear();
// Clean up exception info.
LandingPads.clear();
TypeInfos.clear();
FilterIds.clear();
FilterEnds.clear();
CallsEHReturn = 0;
CallsUnwindInit = 0;
}
/// getDescFor - Convert a Value to a debug information descriptor.
///
// FIXME - use new Value type when available.
DebugInfoDesc *MachineModuleInfo::getDescFor(Value *V) {
return DR.Deserialize(V);
}
/// AnalyzeModule - Scan the module for global debug information.
///
void MachineModuleInfo::AnalyzeModule(Module &M) {
SetupCompileUnits(M);
// Insert functions in the llvm.used array into UsedFunctions.
GlobalVariable *GV = M.getGlobalVariable("llvm.used");
if (!GV || !GV->hasInitializer()) return;
// Should be an array of 'i8*'.
ConstantArray *InitList = dyn_cast<ConstantArray>(GV->getInitializer());
if (InitList == 0) return;
for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i) {
if (ConstantExpr *CE = dyn_cast<ConstantExpr>(InitList->getOperand(i)))
if (CE->getOpcode() == Instruction::BitCast)
if (Function *F = dyn_cast<Function>(CE->getOperand(0)))
UsedFunctions.insert(F);
}
}
/// SetupCompileUnits - Set up the unique vector of compile units.
///
void MachineModuleInfo::SetupCompileUnits(Module &M) {
std::vector<void*> CUList;
CompileUnitDesc CUD;
getAnchoredDescriptors(M, &CUD, CUList);
for (unsigned i = 0, N = CUList.size(); i < N; i++)
CompileUnits.insert((CompileUnitDesc*)CUList[i]);
}
/// getCompileUnits - Return a vector of debug compile units.
///
const UniqueVector<CompileUnitDesc *> MachineModuleInfo::getCompileUnits()const{
return CompileUnits;
}
/// getAnchoredDescriptors - Return a vector of anchored debug descriptors.
///
void
MachineModuleInfo::getAnchoredDescriptors(Module &M, const AnchoredDesc *Desc,
std::vector<void*> &AnchoredDescs) {
std::vector<GlobalVariable*> Globals;
getGlobalVariablesUsing(M, Desc->getAnchorString(), Globals);
for (unsigned i = 0, N = Globals.size(); i < N; ++i) {
GlobalVariable *GV = Globals[i];
// FIXME - In the short term, changes are too drastic to continue.
if (DebugInfoDesc::TagFromGlobal(GV) == Desc->getTag() &&
DebugInfoDesc::VersionFromGlobal(GV) == LLVMDebugVersion)
AnchoredDescs.push_back(DR.Deserialize(GV));
}
}
/// getGlobalVariablesUsing - Return all of the GlobalVariables that use the
/// named GlobalVariable.
void
MachineModuleInfo::getGlobalVariablesUsing(Module &M,
const std::string &RootName,
std::vector<GlobalVariable*> &Globals) {
return ::getGlobalVariablesUsing(M, RootName, Globals);
}
/// RecordSourceLine - Records location information and associates it with a
/// debug label. Returns a unique label ID used to generate a label and
/// provide correspondence to the source line list.
unsigned MachineModuleInfo::RecordSourceLine(unsigned Line, unsigned Column,
unsigned Source) {
unsigned ID = NextLabelID();
Lines.push_back(SourceLineInfo(Line, Column, Source, ID));
return ID;
}
/// RecordSource - Register a source file with debug info. Returns an source
/// ID.
unsigned MachineModuleInfo::RecordSource(const std::string &Directory,
const std::string &Source) {
unsigned DirectoryID = Directories.insert(Directory);
return SourceFiles.insert(SourceFileInfo(DirectoryID, Source));
}
unsigned MachineModuleInfo::RecordSource(const CompileUnitDesc *CompileUnit) {
return RecordSource(CompileUnit->getDirectory(),
CompileUnit->getFileName());
}
/// RecordRegionStart - Indicate the start of a region.
///
unsigned MachineModuleInfo::RecordRegionStart(Value *V) {
// FIXME - need to be able to handle split scopes because of bb cloning.
DebugInfoDesc *ScopeDesc = DR.Deserialize(V);
DebugScope *Scope = getOrCreateScope(ScopeDesc);
unsigned ID = NextLabelID();
if (!Scope->getStartLabelID()) Scope->setStartLabelID(ID);
return ID;
}
/// RecordRegionEnd - Indicate the end of a region.
///
unsigned MachineModuleInfo::RecordRegionEnd(Value *V) {
// FIXME - need to be able to handle split scopes because of bb cloning.
DebugInfoDesc *ScopeDesc = DR.Deserialize(V);
DebugScope *Scope = getOrCreateScope(ScopeDesc);
unsigned ID = NextLabelID();
Scope->setEndLabelID(ID);
return ID;
}
/// RecordVariable - Indicate the declaration of a local variable.
///
void MachineModuleInfo::RecordVariable(GlobalValue *GV, unsigned FrameIndex) {
VariableDesc *VD = cast<VariableDesc>(DR.Deserialize(GV));
DebugScope *Scope = getOrCreateScope(VD->getContext());
DebugVariable *DV = new DebugVariable(VD, FrameIndex);
Scope->AddVariable(DV);
}
/// getOrCreateScope - Returns the scope associated with the given descriptor.
///
DebugScope *MachineModuleInfo::getOrCreateScope(DebugInfoDesc *ScopeDesc) {
DebugScope *&Slot = ScopeMap[ScopeDesc];
if (!Slot) {
// FIXME - breaks down when the context is an inlined function.
DebugInfoDesc *ParentDesc = NULL;
if (BlockDesc *Block = dyn_cast<BlockDesc>(ScopeDesc)) {
ParentDesc = Block->getContext();
}
DebugScope *Parent = ParentDesc ? getOrCreateScope(ParentDesc) : NULL;
Slot = new DebugScope(Parent, ScopeDesc);
if (Parent) {
Parent->AddScope(Slot);
} else if (RootScope) {
// FIXME - Add inlined function scopes to the root so we can delete
// them later. Long term, handle inlined functions properly.
RootScope->AddScope(Slot);
} else {
// First function is top level function.
RootScope = Slot;
}
}
return Slot;
}
//===-EH-------------------------------------------------------------------===//
/// getOrCreateLandingPadInfo - Find or create an LandingPadInfo for the
/// specified MachineBasicBlock.
LandingPadInfo &MachineModuleInfo::getOrCreateLandingPadInfo
(MachineBasicBlock *LandingPad) {
unsigned N = LandingPads.size();
for (unsigned i = 0; i < N; ++i) {
LandingPadInfo &LP = LandingPads[i];
if (LP.LandingPadBlock == LandingPad)
return LP;
}
LandingPads.push_back(LandingPadInfo(LandingPad));
return LandingPads[N];
}
/// addInvoke - Provide the begin and end labels of an invoke style call and
/// associate it with a try landing pad block.
void MachineModuleInfo::addInvoke(MachineBasicBlock *LandingPad,
unsigned BeginLabel, unsigned EndLabel) {
LandingPadInfo &LP = getOrCreateLandingPadInfo(LandingPad);
LP.BeginLabels.push_back(BeginLabel);
LP.EndLabels.push_back(EndLabel);
}
/// addLandingPad - Provide the label of a try LandingPad block.
///
unsigned MachineModuleInfo::addLandingPad(MachineBasicBlock *LandingPad) {
unsigned LandingPadLabel = NextLabelID();
LandingPadInfo &LP = getOrCreateLandingPadInfo(LandingPad);
LP.LandingPadLabel = LandingPadLabel;
return LandingPadLabel;
}
/// addPersonality - Provide the personality function for the exception
/// information.
void MachineModuleInfo::addPersonality(MachineBasicBlock *LandingPad,
Function *Personality) {
LandingPadInfo &LP = getOrCreateLandingPadInfo(LandingPad);
LP.Personality = Personality;
for (unsigned i = 0; i < Personalities.size(); ++i)
if (Personalities[i] == Personality)
return;
Personalities.push_back(Personality);
}
/// addCatchTypeInfo - Provide the catch typeinfo for a landing pad.
///
void MachineModuleInfo::addCatchTypeInfo(MachineBasicBlock *LandingPad,
std::vector<GlobalVariable *> &TyInfo) {
LandingPadInfo &LP = getOrCreateLandingPadInfo(LandingPad);
for (unsigned N = TyInfo.size(); N; --N)
LP.TypeIds.push_back(getTypeIDFor(TyInfo[N - 1]));
}
/// addFilterTypeInfo - Provide the filter typeinfo for a landing pad.
///
void MachineModuleInfo::addFilterTypeInfo(MachineBasicBlock *LandingPad,
std::vector<GlobalVariable *> &TyInfo) {
LandingPadInfo &LP = getOrCreateLandingPadInfo(LandingPad);
std::vector<unsigned> IdsInFilter (TyInfo.size());
for (unsigned I = 0, E = TyInfo.size(); I != E; ++I)
IdsInFilter[I] = getTypeIDFor(TyInfo[I]);
LP.TypeIds.push_back(getFilterIDFor(IdsInFilter));
}
/// addCleanup - Add a cleanup action for a landing pad.
///
void MachineModuleInfo::addCleanup(MachineBasicBlock *LandingPad) {
LandingPadInfo &LP = getOrCreateLandingPadInfo(LandingPad);
LP.TypeIds.push_back(0);
}
/// TidyLandingPads - Remap landing pad labels and remove any deleted landing
/// pads.
void MachineModuleInfo::TidyLandingPads() {
for (unsigned i = 0; i != LandingPads.size(); ) {
LandingPadInfo &LandingPad = LandingPads[i];
LandingPad.LandingPadLabel = MappedLabel(LandingPad.LandingPadLabel);
// Special case: we *should* emit LPs with null LP MBB. This indicates
// "nounwind" case.
if (!LandingPad.LandingPadLabel && LandingPad.LandingPadBlock) {
LandingPads.erase(LandingPads.begin() + i);
continue;
}
for (unsigned j=0; j != LandingPads[i].BeginLabels.size(); ) {
unsigned BeginLabel = MappedLabel(LandingPad.BeginLabels[j]);
unsigned EndLabel = MappedLabel(LandingPad.EndLabels[j]);
if (!BeginLabel || !EndLabel) {
LandingPad.BeginLabels.erase(LandingPad.BeginLabels.begin() + j);
LandingPad.EndLabels.erase(LandingPad.EndLabels.begin() + j);
continue;
}
LandingPad.BeginLabels[j] = BeginLabel;
LandingPad.EndLabels[j] = EndLabel;
++j;
}
// Remove landing pads with no try-ranges.
if (LandingPads[i].BeginLabels.empty()) {
LandingPads.erase(LandingPads.begin() + i);
continue;
}
// If there is no landing pad, ensure that the list of typeids is empty.
// If the only typeid is a cleanup, this is the same as having no typeids.
if (!LandingPad.LandingPadBlock ||
(LandingPad.TypeIds.size() == 1 && !LandingPad.TypeIds[0]))
LandingPad.TypeIds.clear();
++i;
}
}
/// getTypeIDFor - Return the type id for the specified typeinfo. This is
/// function wide.
unsigned MachineModuleInfo::getTypeIDFor(GlobalVariable *TI) {
for (unsigned i = 0, N = TypeInfos.size(); i != N; ++i)
if (TypeInfos[i] == TI) return i + 1;
TypeInfos.push_back(TI);
return TypeInfos.size();
}
/// getFilterIDFor - Return the filter id for the specified typeinfos. This is
/// function wide.
int MachineModuleInfo::getFilterIDFor(std::vector<unsigned> &TyIds) {
// If the new filter coincides with the tail of an existing filter, then
// re-use the existing filter. Folding filters more than this requires
// re-ordering filters and/or their elements - probably not worth it.
for (std::vector<unsigned>::iterator I = FilterEnds.begin(),
E = FilterEnds.end(); I != E; ++I) {
unsigned i = *I, j = TyIds.size();
while (i && j)
if (FilterIds[--i] != TyIds[--j])
goto try_next;
if (!j)
// The new filter coincides with range [i, end) of the existing filter.
return -(1 + i);
try_next:;
}
// Add the new filter.
int FilterID = -(1 + FilterIds.size());
FilterIds.reserve(FilterIds.size() + TyIds.size() + 1);
for (unsigned I = 0, N = TyIds.size(); I != N; ++I)
FilterIds.push_back(TyIds[I]);
FilterEnds.push_back(FilterIds.size());
FilterIds.push_back(0); // terminator
return FilterID;
}
/// getPersonality - Return the personality function for the current function.
Function *MachineModuleInfo::getPersonality() const {
// FIXME: Until PR1414 will be fixed, we're using 1 personality function per
// function
return !LandingPads.empty() ? LandingPads[0].Personality : NULL;
}
/// getPersonalityIndex - Return unique index for current personality
/// function. NULL personality function should always get zero index.
unsigned MachineModuleInfo::getPersonalityIndex() const {
const Function* Personality = NULL;
// Scan landing pads. If there is at least one non-NULL personality - use it.
for (unsigned i = 0; i != LandingPads.size(); ++i)
if (LandingPads[i].Personality) {
Personality = LandingPads[i].Personality;
break;
}
for (unsigned i = 0; i < Personalities.size(); ++i) {
if (Personalities[i] == Personality)
return i;
}
// This should never happen
assert(0 && "Personality function should be set!");
return 0;
}
//===----------------------------------------------------------------------===//
/// DebugLabelFolding pass - This pass prunes out redundant labels. This allows
/// a info consumer to determine if the range of two labels is empty, by seeing
/// if the labels map to the same reduced label.
namespace llvm {
struct DebugLabelFolder : public MachineFunctionPass {
static char ID;
DebugLabelFolder() : MachineFunctionPass((intptr_t)&ID) {}
virtual bool runOnMachineFunction(MachineFunction &MF);
virtual const char *getPassName() const { return "Label Folder"; }
};
char DebugLabelFolder::ID = 0;
bool DebugLabelFolder::runOnMachineFunction(MachineFunction &MF) {
// Get machine module info.
MachineModuleInfo *MMI = getAnalysisToUpdate<MachineModuleInfo>();
if (!MMI) return false;
// Track if change is made.
bool MadeChange = false;
// No prior label to begin.
unsigned PriorLabel = 0;
// Iterate through basic blocks.
for (MachineFunction::iterator BB = MF.begin(), E = MF.end();
BB != E; ++BB) {
// Iterate through instructions.
for (MachineBasicBlock::iterator I = BB->begin(), E = BB->end(); I != E; ) {
// Is it a label.
if (I->isDebugLabel()) {
// The label ID # is always operand #0, an immediate.
unsigned NextLabel = I->getOperand(0).getImm();
// If there was an immediate prior label.
if (PriorLabel) {
// Remap the current label to prior label.
MMI->RemapLabel(NextLabel, PriorLabel);
// Delete the current label.
I = BB->erase(I);
// Indicate a change has been made.
MadeChange = true;
continue;
} else {
// Start a new round.
PriorLabel = NextLabel;
}
} else {
// No consecutive labels.
PriorLabel = 0;
}
++I;
}
}
return MadeChange;
}
FunctionPass *createDebugLabelFoldingPass() { return new DebugLabelFolder(); }
}
Reference in New Issue View Git Blame Copy Permalink