blob: d2e5256de8870995c436a48fba858008ad608d12 [file] [log] [blame]
//===-- llvmAsmParser.y - Parser for llvm assembly files --------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file was developed by the LLVM research group and is distributed under
// the University of Illinois Open Source License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements the bison parser for LLVM assembly languages files.
//
//===----------------------------------------------------------------------===//
%{
#include "ParserInternals.h"
#include "llvm/CallingConv.h"
#include "llvm/InlineAsm.h"
#include "llvm/Instructions.h"
#include "llvm/Module.h"
#include "llvm/ValueSymbolTable.h"
#include "llvm/AutoUpgrade.h"
#include "llvm/Support/GetElementPtrTypeIterator.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/Support/MathExtras.h"
#include "llvm/Support/Streams.h"
#include <algorithm>
#include <list>
#include <map>
#include <utility>
#ifndef NDEBUG
#define YYDEBUG 1
#endif
// The following is a gross hack. In order to rid the libAsmParser library of
// exceptions, we have to have a way of getting the yyparse function to go into
// an error situation. So, whenever we want an error to occur, the GenerateError
// function (see bottom of file) sets TriggerError. Then, at the end of each
// production in the grammer we use CHECK_FOR_ERROR which will invoke YYERROR
// (a goto) to put YACC in error state. Furthermore, several calls to
// GenerateError are made from inside productions and they must simulate the
// previous exception behavior by exiting the production immediately. We have
// replaced these with the GEN_ERROR macro which calls GeneratError and then
// immediately invokes YYERROR. This would be so much cleaner if it was a
// recursive descent parser.
static bool TriggerError = false;
#define CHECK_FOR_ERROR { if (TriggerError) { TriggerError = false; YYABORT; } }
#define GEN_ERROR(msg) { GenerateError(msg); YYERROR; }
int yyerror(const char *ErrorMsg); // Forward declarations to prevent "implicit
int yylex(); // declaration" of xxx warnings.
int yyparse();
namespace llvm {
std::string CurFilename;
#if YYDEBUG
static cl::opt<bool>
Debug("debug-yacc", cl::desc("Print yacc debug state changes"),
cl::Hidden, cl::init(false));
#endif
}
using namespace llvm;
static Module *ParserResult;
// DEBUG_UPREFS - Define this symbol if you want to enable debugging output
// relating to upreferences in the input stream.
//
//#define DEBUG_UPREFS 1
#ifdef DEBUG_UPREFS
#define UR_OUT(X) cerr << X
#else
#define UR_OUT(X)
#endif
#define YYERROR_VERBOSE 1
static GlobalVariable *CurGV;
// This contains info used when building the body of a function. It is
// destroyed when the function is completed.
//
typedef std::vector<Value *> ValueList; // Numbered defs
static void
ResolveDefinitions(ValueList &LateResolvers, ValueList *FutureLateResolvers=0);
static struct PerModuleInfo {
Module *CurrentModule;
ValueList Values; // Module level numbered definitions
ValueList LateResolveValues;
std::vector<PATypeHolder> Types;
std::map<ValID, PATypeHolder> LateResolveTypes;
/// PlaceHolderInfo - When temporary placeholder objects are created, remember
/// how they were referenced and on which line of the input they came from so
/// that we can resolve them later and print error messages as appropriate.
std::map<Value*, std::pair<ValID, int> > PlaceHolderInfo;
// GlobalRefs - This maintains a mapping between <Type, ValID>'s and forward
// references to global values. Global values may be referenced before they
// are defined, and if so, the temporary object that they represent is held
// here. This is used for forward references of GlobalValues.
//
typedef std::map<std::pair<const PointerType *,
ValID>, GlobalValue*> GlobalRefsType;
GlobalRefsType GlobalRefs;
void ModuleDone() {
// If we could not resolve some functions at function compilation time
// (calls to functions before they are defined), resolve them now... Types
// are resolved when the constant pool has been completely parsed.
//
ResolveDefinitions(LateResolveValues);
if (TriggerError)
return;
// Check to make sure that all global value forward references have been
// resolved!
//
if (!GlobalRefs.empty()) {
std::string UndefinedReferences = "Unresolved global references exist:\n";
for (GlobalRefsType::iterator I = GlobalRefs.begin(), E =GlobalRefs.end();
I != E; ++I) {
UndefinedReferences += " " + I->first.first->getDescription() + " " +
I->first.second.getName() + "\n";
}
GenerateError(UndefinedReferences);
return;
}
// Look for intrinsic functions and CallInst that need to be upgraded
for (Module::iterator FI = CurrentModule->begin(),
FE = CurrentModule->end(); FI != FE; )
UpgradeCallsToIntrinsic(FI++); // must be post-increment, as we remove
Values.clear(); // Clear out function local definitions
Types.clear();
CurrentModule = 0;
}
// GetForwardRefForGlobal - Check to see if there is a forward reference
// for this global. If so, remove it from the GlobalRefs map and return it.
// If not, just return null.
GlobalValue *GetForwardRefForGlobal(const PointerType *PTy, ValID ID) {
// Check to see if there is a forward reference to this global variable...
// if there is, eliminate it and patch the reference to use the new def'n.
GlobalRefsType::iterator I = GlobalRefs.find(std::make_pair(PTy, ID));
GlobalValue *Ret = 0;
if (I != GlobalRefs.end()) {
Ret = I->second;
GlobalRefs.erase(I);
}
return Ret;
}
bool TypeIsUnresolved(PATypeHolder* PATy) {
// If it isn't abstract, its resolved
const Type* Ty = PATy->get();
if (!Ty->isAbstract())
return false;
// Traverse the type looking for abstract types. If it isn't abstract then
// we don't need to traverse that leg of the type.
std::vector<const Type*> WorkList, SeenList;
WorkList.push_back(Ty);
while (!WorkList.empty()) {
const Type* Ty = WorkList.back();
SeenList.push_back(Ty);
WorkList.pop_back();
if (const OpaqueType* OpTy = dyn_cast<OpaqueType>(Ty)) {
// Check to see if this is an unresolved type
std::map<ValID, PATypeHolder>::iterator I = LateResolveTypes.begin();
std::map<ValID, PATypeHolder>::iterator E = LateResolveTypes.end();
for ( ; I != E; ++I) {
if (I->second.get() == OpTy)
return true;
}
} else if (const SequentialType* SeqTy = dyn_cast<SequentialType>(Ty)) {
const Type* TheTy = SeqTy->getElementType();
if (TheTy->isAbstract() && TheTy != Ty) {
std::vector<const Type*>::iterator I = SeenList.begin(),
E = SeenList.end();
for ( ; I != E; ++I)
if (*I == TheTy)
break;
if (I == E)
WorkList.push_back(TheTy);
}
} else if (const StructType* StrTy = dyn_cast<StructType>(Ty)) {
for (unsigned i = 0; i < StrTy->getNumElements(); ++i) {
const Type* TheTy = StrTy->getElementType(i);
if (TheTy->isAbstract() && TheTy != Ty) {
std::vector<const Type*>::iterator I = SeenList.begin(),
E = SeenList.end();
for ( ; I != E; ++I)
if (*I == TheTy)
break;
if (I == E)
WorkList.push_back(TheTy);
}
}
}
}
return false;
}
} CurModule;
static struct PerFunctionInfo {
Function *CurrentFunction; // Pointer to current function being created
ValueList Values; // Keep track of #'d definitions
unsigned NextValNum;
ValueList LateResolveValues;
bool isDeclare; // Is this function a forward declararation?
GlobalValue::LinkageTypes Linkage; // Linkage for forward declaration.
GlobalValue::VisibilityTypes Visibility;
/// BBForwardRefs - When we see forward references to basic blocks, keep
/// track of them here.
std::map<ValID, BasicBlock*> BBForwardRefs;
inline PerFunctionInfo() {
CurrentFunction = 0;
isDeclare = false;
Linkage = GlobalValue::ExternalLinkage;
Visibility = GlobalValue::DefaultVisibility;
}
inline void FunctionStart(Function *M) {
CurrentFunction = M;
NextValNum = 0;
}
void FunctionDone() {
// Any forward referenced blocks left?
if (!BBForwardRefs.empty()) {
GenerateError("Undefined reference to label " +
BBForwardRefs.begin()->second->getName());
return;
}
// Resolve all forward references now.
ResolveDefinitions(LateResolveValues, &CurModule.LateResolveValues);
Values.clear(); // Clear out function local definitions
BBForwardRefs.clear();
CurrentFunction = 0;
isDeclare = false;
Linkage = GlobalValue::ExternalLinkage;
Visibility = GlobalValue::DefaultVisibility;
}
} CurFun; // Info for the current function...
static bool inFunctionScope() { return CurFun.CurrentFunction != 0; }
//===----------------------------------------------------------------------===//
// Code to handle definitions of all the types
//===----------------------------------------------------------------------===//
static void InsertValue(Value *V, ValueList &ValueTab = CurFun.Values) {
// Things that have names or are void typed don't get slot numbers
if (V->hasName() || (V->getType() == Type::VoidTy))
return;
// In the case of function values, we have to allow for the forward reference
// of basic blocks, which are included in the numbering. Consequently, we keep
// track of the next insertion location with NextValNum. When a BB gets
// inserted, it could change the size of the CurFun.Values vector.
if (&ValueTab == &CurFun.Values) {
if (ValueTab.size() <= CurFun.NextValNum)
ValueTab.resize(CurFun.NextValNum+1);
ValueTab[CurFun.NextValNum++] = V;
return;
}
// For all other lists, its okay to just tack it on the back of the vector.
ValueTab.push_back(V);
}
static const Type *getTypeVal(const ValID &D, bool DoNotImprovise = false) {
switch (D.Type) {
case ValID::LocalID: // Is it a numbered definition?
// Module constants occupy the lowest numbered slots...
if (D.Num < CurModule.Types.size())
return CurModule.Types[D.Num];
break;
case ValID::LocalName: // Is it a named definition?
if (const Type *N = CurModule.CurrentModule->getTypeByName(D.getName())) {
D.destroy(); // Free old strdup'd memory...
return N;
}
break;
default:
GenerateError("Internal parser error: Invalid symbol type reference");
return 0;
}
// If we reached here, we referenced either a symbol that we don't know about
// or an id number that hasn't been read yet. We may be referencing something
// forward, so just create an entry to be resolved later and get to it...
//
if (DoNotImprovise) return 0; // Do we just want a null to be returned?
if (inFunctionScope()) {
if (D.Type == ValID::LocalName) {
GenerateError("Reference to an undefined type: '" + D.getName() + "'");
return 0;
} else {
GenerateError("Reference to an undefined type: #" + utostr(D.Num));
return 0;
}
}
std::map<ValID, PATypeHolder>::iterator I =CurModule.LateResolveTypes.find(D);
if (I != CurModule.LateResolveTypes.end())
return I->second;
Type *Typ = OpaqueType::get();
CurModule.LateResolveTypes.insert(std::make_pair(D, Typ));
return Typ;
}
// getExistingVal - Look up the value specified by the provided type and
// the provided ValID. If the value exists and has already been defined, return
// it. Otherwise return null.
//
static Value *getExistingVal(const Type *Ty, const ValID &D) {
if (isa<FunctionType>(Ty)) {
GenerateError("Functions are not values and "
"must be referenced as pointers");
return 0;
}
switch (D.Type) {
case ValID::LocalID: { // Is it a numbered definition?
// Check that the number is within bounds.
if (D.Num >= CurFun.Values.size())
return 0;
Value *Result = CurFun.Values[D.Num];
if (Ty != Result->getType()) {
GenerateError("Numbered value (%" + utostr(D.Num) + ") of type '" +
Result->getType()->getDescription() + "' does not match "
"expected type, '" + Ty->getDescription() + "'");
return 0;
}
return Result;
}
case ValID::GlobalID: { // Is it a numbered definition?
if (D.Num >= CurModule.Values.size())
return 0;
Value *Result = CurModule.Values[D.Num];
if (Ty != Result->getType()) {
GenerateError("Numbered value (@" + utostr(D.Num) + ") of type '" +
Result->getType()->getDescription() + "' does not match "
"expected type, '" + Ty->getDescription() + "'");
return 0;
}
return Result;
}
case ValID::LocalName: { // Is it a named definition?
if (!inFunctionScope())
return 0;
ValueSymbolTable &SymTab = CurFun.CurrentFunction->getValueSymbolTable();
Value *N = SymTab.lookup(D.getName());
if (N == 0)
return 0;
if (N->getType() != Ty)
return 0;
D.destroy(); // Free old strdup'd memory...
return N;
}
case ValID::GlobalName: { // Is it a named definition?
ValueSymbolTable &SymTab = CurModule.CurrentModule->getValueSymbolTable();
Value *N = SymTab.lookup(D.getName());
if (N == 0)
return 0;
if (N->getType() != Ty)
return 0;
D.destroy(); // Free old strdup'd memory...
return N;
}
// Check to make sure that "Ty" is an integral type, and that our
// value will fit into the specified type...
case ValID::ConstSIntVal: // Is it a constant pool reference??
if (!ConstantInt::isValueValidForType(Ty, D.ConstPool64)) {
GenerateError("Signed integral constant '" +
itostr(D.ConstPool64) + "' is invalid for type '" +
Ty->getDescription() + "'");
return 0;
}
return ConstantInt::get(Ty, D.ConstPool64, true);
case ValID::ConstUIntVal: // Is it an unsigned const pool reference?
if (!ConstantInt::isValueValidForType(Ty, D.UConstPool64)) {
if (!ConstantInt::isValueValidForType(Ty, D.ConstPool64)) {
GenerateError("Integral constant '" + utostr(D.UConstPool64) +
"' is invalid or out of range");
return 0;
} else { // This is really a signed reference. Transmogrify.
return ConstantInt::get(Ty, D.ConstPool64, true);
}
} else {
return ConstantInt::get(Ty, D.UConstPool64);
}
case ValID::ConstFPVal: // Is it a floating point const pool reference?
if (!ConstantFP::isValueValidForType(Ty, *D.ConstPoolFP)) {
GenerateError("FP constant invalid for type");
return 0;
}
// Lexer has no type info, so builds all float and double FP constants
// as double. Fix this here. Long double does not need this.
if (&D.ConstPoolFP->getSemantics() == &APFloat::IEEEdouble &&
Ty==Type::FloatTy)
D.ConstPoolFP->convert(APFloat::IEEEsingle, APFloat::rmNearestTiesToEven);
return ConstantFP::get(Ty, *D.ConstPoolFP);
case ValID::ConstNullVal: // Is it a null value?
if (!isa<PointerType>(Ty)) {
GenerateError("Cannot create a a non pointer null");
return 0;
}
return ConstantPointerNull::get(cast<PointerType>(Ty));
case ValID::ConstUndefVal: // Is it an undef value?
return UndefValue::get(Ty);
case ValID::ConstZeroVal: // Is it a zero value?
return Constant::getNullValue(Ty);
case ValID::ConstantVal: // Fully resolved constant?
if (D.ConstantValue->getType() != Ty) {
GenerateError("Constant expression type different from required type");
return 0;
}
return D.ConstantValue;
case ValID::InlineAsmVal: { // Inline asm expression
const PointerType *PTy = dyn_cast<PointerType>(Ty);
const FunctionType *FTy =
PTy ? dyn_cast<FunctionType>(PTy->getElementType()) : 0;
if (!FTy || !InlineAsm::Verify(FTy, D.IAD->Constraints)) {
GenerateError("Invalid type for asm constraint string");
return 0;
}
InlineAsm *IA = InlineAsm::get(FTy, D.IAD->AsmString, D.IAD->Constraints,
D.IAD->HasSideEffects);
D.destroy(); // Free InlineAsmDescriptor.
return IA;
}
default:
assert(0 && "Unhandled case!");
return 0;
} // End of switch
assert(0 && "Unhandled case!");
return 0;
}
// getVal - This function is identical to getExistingVal, except that if a
// value is not already defined, it "improvises" by creating a placeholder var
// that looks and acts just like the requested variable. When the value is
// defined later, all uses of the placeholder variable are replaced with the
// real thing.
//
static Value *getVal(const Type *Ty, const ValID &ID) {
if (Ty == Type::LabelTy) {
GenerateError("Cannot use a basic block here");
return 0;
}
// See if the value has already been defined.
Value *V = getExistingVal(Ty, ID);
if (V) return V;
if (TriggerError) return 0;
if (!Ty->isFirstClassType() && !isa<OpaqueType>(Ty)) {
GenerateError("Invalid use of a composite type");
return 0;
}
// If we reached here, we referenced either a symbol that we don't know about
// or an id number that hasn't been read yet. We may be referencing something
// forward, so just create an entry to be resolved later and get to it...
//
switch (ID.Type) {
case ValID::GlobalName:
case ValID::GlobalID: {
const PointerType *PTy = dyn_cast<PointerType>(Ty);
if (!PTy) {
GenerateError("Invalid type for reference to global" );
return 0;
}
const Type* ElTy = PTy->getElementType();
if (const FunctionType *FTy = dyn_cast<FunctionType>(ElTy))
V = new Function(FTy, GlobalValue::ExternalLinkage);
else
V = new GlobalVariable(ElTy, false, GlobalValue::ExternalLinkage);
break;
}
default:
V = new Argument(Ty);
}
// Remember where this forward reference came from. FIXME, shouldn't we try
// to recycle these things??
CurModule.PlaceHolderInfo.insert(std::make_pair(V, std::make_pair(ID,
llvmAsmlineno)));
if (inFunctionScope())
InsertValue(V, CurFun.LateResolveValues);
else
InsertValue(V, CurModule.LateResolveValues);
return V;
}
/// defineBBVal - This is a definition of a new basic block with the specified
/// identifier which must be the same as CurFun.NextValNum, if its numeric.
static BasicBlock *defineBBVal(const ValID &ID) {
assert(inFunctionScope() && "Can't get basic block at global scope!");
BasicBlock *BB = 0;
// First, see if this was forward referenced
std::map<ValID, BasicBlock*>::iterator BBI = CurFun.BBForwardRefs.find(ID);
if (BBI != CurFun.BBForwardRefs.end()) {
BB = BBI->second;
// The forward declaration could have been inserted anywhere in the
// function: insert it into the correct place now.
CurFun.CurrentFunction->getBasicBlockList().remove(BB);
CurFun.CurrentFunction->getBasicBlockList().push_back(BB);
// We're about to erase the entry, save the key so we can clean it up.
ValID Tmp = BBI->first;
// Erase the forward ref from the map as its no longer "forward"
CurFun.BBForwardRefs.erase(ID);
// The key has been removed from the map but so we don't want to leave
// strdup'd memory around so destroy it too.
Tmp.destroy();
// If its a numbered definition, bump the number and set the BB value.
if (ID.Type == ValID::LocalID) {
assert(ID.Num == CurFun.NextValNum && "Invalid new block number");
InsertValue(BB);
}
ID.destroy();
return BB;
}
// We haven't seen this BB before and its first mention is a definition.
// Just create it and return it.
std::string Name (ID.Type == ValID::LocalName ? ID.getName() : "");
BB = new BasicBlock(Name, CurFun.CurrentFunction);
if (ID.Type == ValID::LocalID) {
assert(ID.Num == CurFun.NextValNum && "Invalid new block number");
InsertValue(BB);
}
ID.destroy(); // Free strdup'd memory
return BB;
}
/// getBBVal - get an existing BB value or create a forward reference for it.
///
static BasicBlock *getBBVal(const ValID &ID) {
assert(inFunctionScope() && "Can't get basic block at global scope!");
BasicBlock *BB = 0;
std::map<ValID, BasicBlock*>::iterator BBI = CurFun.BBForwardRefs.find(ID);
if (BBI != CurFun.BBForwardRefs.end()) {
BB = BBI->second;
} if (ID.Type == ValID::LocalName) {
std::string Name = ID.getName();
Value *N = CurFun.CurrentFunction->getValueSymbolTable().lookup(Name);
if (N)
if (N->getType()->getTypeID() == Type::LabelTyID)
BB = cast<BasicBlock>(N);
else
GenerateError("Reference to label '" + Name + "' is actually of type '"+
N->getType()->getDescription() + "'");
} else if (ID.Type == ValID::LocalID) {
if (ID.Num < CurFun.NextValNum && ID.Num < CurFun.Values.size()) {
if (CurFun.Values[ID.Num]->getType()->getTypeID() == Type::LabelTyID)
BB = cast<BasicBlock>(CurFun.Values[ID.Num]);
else
GenerateError("Reference to label '%" + utostr(ID.Num) +
"' is actually of type '"+
CurFun.Values[ID.Num]->getType()->getDescription() + "'");
}
} else {
GenerateError("Illegal label reference " + ID.getName());
return 0;
}
// If its already been defined, return it now.
if (BB) {
ID.destroy(); // Free strdup'd memory.
return BB;
}
// Otherwise, this block has not been seen before, create it.
std::string Name;
if (ID.Type == ValID::LocalName)
Name = ID.getName();
BB = new BasicBlock(Name, CurFun.CurrentFunction);
// Insert it in the forward refs map.
CurFun.BBForwardRefs[ID] = BB;
return BB;
}
//===----------------------------------------------------------------------===//
// Code to handle forward references in instructions
//===----------------------------------------------------------------------===//
//
// This code handles the late binding needed with statements that reference
// values not defined yet... for example, a forward branch, or the PHI node for
// a loop body.
//
// This keeps a table (CurFun.LateResolveValues) of all such forward references
// and back patchs after we are done.
//
// ResolveDefinitions - If we could not resolve some defs at parsing
// time (forward branches, phi functions for loops, etc...) resolve the
// defs now...
//
static void
ResolveDefinitions(ValueList &LateResolvers, ValueList *FutureLateResolvers) {
// Loop over LateResolveDefs fixing up stuff that couldn't be resolved
while (!LateResolvers.empty()) {
Value *V = LateResolvers.back();
LateResolvers.pop_back();
std::map<Value*, std::pair<ValID, int> >::iterator PHI =
CurModule.PlaceHolderInfo.find(V);
assert(PHI != CurModule.PlaceHolderInfo.end() && "Placeholder error!");
ValID &DID = PHI->second.first;
Value *TheRealValue = getExistingVal(V->getType(), DID);
if (TriggerError)
return;
if (TheRealValue) {
V->replaceAllUsesWith(TheRealValue);
delete V;
CurModule.PlaceHolderInfo.erase(PHI);
} else if (FutureLateResolvers) {
// Functions have their unresolved items forwarded to the module late
// resolver table
InsertValue(V, *FutureLateResolvers);
} else {
if (DID.Type == ValID::LocalName || DID.Type == ValID::GlobalName) {
GenerateError("Reference to an invalid definition: '" +DID.getName()+
"' of type '" + V->getType()->getDescription() + "'",
PHI->second.second);
return;
} else {
GenerateError("Reference to an invalid definition: #" +
itostr(DID.Num) + " of type '" +
V->getType()->getDescription() + "'",
PHI->second.second);
return;
}
}
}
LateResolvers.clear();
}
// ResolveTypeTo - A brand new type was just declared. This means that (if
// name is not null) things referencing Name can be resolved. Otherwise, things
// refering to the number can be resolved. Do this now.
//
static void ResolveTypeTo(std::string *Name, const Type *ToTy) {
ValID D;
if (Name)
D = ValID::createLocalName(*Name);
else
D = ValID::createLocalID(CurModule.Types.size());
std::map<ValID, PATypeHolder>::iterator I =
CurModule.LateResolveTypes.find(D);
if (I != CurModule.LateResolveTypes.end()) {
((DerivedType*)I->second.get())->refineAbstractTypeTo(ToTy);
CurModule.LateResolveTypes.erase(I);
}
}
// setValueName - Set the specified value to the name given. The name may be
// null potentially, in which case this is a noop. The string passed in is
// assumed to be a malloc'd string buffer, and is free'd by this function.
//
static void setValueName(Value *V, std::string *NameStr) {
if (!NameStr) return;
std::string Name(*NameStr); // Copy string
delete NameStr; // Free old string
if (V->getType() == Type::VoidTy) {
GenerateError("Can't assign name '" + Name+"' to value with void type");
return;
}
assert(inFunctionScope() && "Must be in function scope!");
ValueSymbolTable &ST = CurFun.CurrentFunction->getValueSymbolTable();
if (ST.lookup(Name)) {
GenerateError("Redefinition of value '" + Name + "' of type '" +
V->getType()->getDescription() + "'");
return;
}
// Set the name.
V->setName(Name);
}
/// ParseGlobalVariable - Handle parsing of a global. If Initializer is null,
/// this is a declaration, otherwise it is a definition.
static GlobalVariable *
ParseGlobalVariable(std::string *NameStr,
GlobalValue::LinkageTypes Linkage,
GlobalValue::VisibilityTypes Visibility,
bool isConstantGlobal, const Type *Ty,
Constant *Initializer, bool IsThreadLocal) {
if (isa<FunctionType>(Ty)) {
GenerateError("Cannot declare global vars of function type");
return 0;
}
const PointerType *PTy = PointerType::get(Ty);
std::string Name;
if (NameStr) {
Name = *NameStr; // Copy string
delete NameStr; // Free old string
}
// See if this global value was forward referenced. If so, recycle the
// object.
ValID ID;
if (!Name.empty()) {
ID = ValID::createGlobalName(Name);
} else {
ID = ValID::createGlobalID(CurModule.Values.size());
}
if (GlobalValue *FWGV = CurModule.GetForwardRefForGlobal(PTy, ID)) {
// Move the global to the end of the list, from whereever it was
// previously inserted.
GlobalVariable *GV = cast<GlobalVariable>(FWGV);
CurModule.CurrentModule->getGlobalList().remove(GV);
CurModule.CurrentModule->getGlobalList().push_back(GV);
GV->setInitializer(Initializer);
GV->setLinkage(Linkage);
GV->setVisibility(Visibility);
GV->setConstant(isConstantGlobal);
GV->setThreadLocal(IsThreadLocal);
InsertValue(GV, CurModule.Values);
return GV;
}
// If this global has a name
if (!Name.empty()) {
// if the global we're parsing has an initializer (is a definition) and
// has external linkage.
if (Initializer && Linkage != GlobalValue::InternalLinkage)
// If there is already a global with external linkage with this name
if (CurModule.CurrentModule->getGlobalVariable(Name, false)) {
// If we allow this GVar to get created, it will be renamed in the
// symbol table because it conflicts with an existing GVar. We can't
// allow redefinition of GVars whose linking indicates that their name
// must stay the same. Issue the error.
GenerateError("Redefinition of global variable named '" + Name +
"' of type '" + Ty->getDescription() + "'");
return 0;
}
}
// Otherwise there is no existing GV to use, create one now.
GlobalVariable *GV =
new GlobalVariable(Ty, isConstantGlobal, Linkage, Initializer, Name,
CurModule.CurrentModule, IsThreadLocal);
GV->setVisibility(Visibility);
InsertValue(GV, CurModule.Values);
return GV;
}
// setTypeName - Set the specified type to the name given. The name may be
// null potentially, in which case this is a noop. The string passed in is
// assumed to be a malloc'd string buffer, and is freed by this function.
//
// This function returns true if the type has already been defined, but is
// allowed to be redefined in the specified context. If the name is a new name
// for the type plane, it is inserted and false is returned.
static bool setTypeName(const Type *T, std::string *NameStr) {
assert(!inFunctionScope() && "Can't give types function-local names!");
if (NameStr == 0) return false;
std::string Name(*NameStr); // Copy string
delete NameStr; // Free old string
// We don't allow assigning names to void type
if (T == Type::VoidTy) {
GenerateError("Can't assign name '" + Name + "' to the void type");
return false;
}
// Set the type name, checking for conflicts as we do so.
bool AlreadyExists = CurModule.CurrentModule->addTypeName(Name, T);
if (AlreadyExists) { // Inserting a name that is already defined???
const Type *Existing = CurModule.CurrentModule->getTypeByName(Name);
assert(Existing && "Conflict but no matching type?!");
// There is only one case where this is allowed: when we are refining an
// opaque type. In this case, Existing will be an opaque type.
if (const OpaqueType *OpTy = dyn_cast<OpaqueType>(Existing)) {
// We ARE replacing an opaque type!
const_cast<OpaqueType*>(OpTy)->refineAbstractTypeTo(T);
return true;
}
// Otherwise, this is an attempt to redefine a type. That's okay if
// the redefinition is identical to the original. This will be so if
// Existing and T point to the same Type object. In this one case we
// allow the equivalent redefinition.
if (Existing == T) return true; // Yes, it's equal.
// Any other kind of (non-equivalent) redefinition is an error.
GenerateError("Redefinition of type named '" + Name + "' of type '" +
T->getDescription() + "'");
}
return false;
}
//===----------------------------------------------------------------------===//
// Code for handling upreferences in type names...
//
// TypeContains - Returns true if Ty directly contains E in it.
//
static bool TypeContains(const Type *Ty, const Type *E) {
return std::find(Ty->subtype_begin(), Ty->subtype_end(),
E) != Ty->subtype_end();
}
namespace {
struct UpRefRecord {
// NestingLevel - The number of nesting levels that need to be popped before
// this type is resolved.
unsigned NestingLevel;
// LastContainedTy - This is the type at the current binding level for the
// type. Every time we reduce the nesting level, this gets updated.
const Type *LastContainedTy;
// UpRefTy - This is the actual opaque type that the upreference is
// represented with.
OpaqueType *UpRefTy;
UpRefRecord(unsigned NL, OpaqueType *URTy)
: NestingLevel(NL), LastContainedTy(URTy), UpRefTy(URTy) {}
};
}
// UpRefs - A list of the outstanding upreferences that need to be resolved.
static std::vector<UpRefRecord> UpRefs;
/// HandleUpRefs - Every time we finish a new layer of types, this function is
/// called. It loops through the UpRefs vector, which is a list of the
/// currently active types. For each type, if the up reference is contained in
/// the newly completed type, we decrement the level count. When the level
/// count reaches zero, the upreferenced type is the type that is passed in:
/// thus we can complete the cycle.
///
static PATypeHolder HandleUpRefs(const Type *ty) {
// If Ty isn't abstract, or if there are no up-references in it, then there is
// nothing to resolve here.
if (!ty->isAbstract() || UpRefs.empty()) return ty;
PATypeHolder Ty(ty);
UR_OUT("Type '" << Ty->getDescription() <<
"' newly formed. Resolving upreferences.\n" <<
UpRefs.size() << " upreferences active!\n");
// If we find any resolvable upreferences (i.e., those whose NestingLevel goes
// to zero), we resolve them all together before we resolve them to Ty. At
// the end of the loop, if there is anything to resolve to Ty, it will be in
// this variable.
OpaqueType *TypeToResolve = 0;
for (unsigned i = 0; i != UpRefs.size(); ++i) {
UR_OUT(" UR#" << i << " - TypeContains(" << Ty->getDescription() << ", "
<< UpRefs[i].second->getDescription() << ") = "
<< (TypeContains(Ty, UpRefs[i].second) ? "true" : "false") << "\n");
if (TypeContains(Ty, UpRefs[i].LastContainedTy)) {
// Decrement level of upreference
unsigned Level = --UpRefs[i].NestingLevel;
UpRefs[i].LastContainedTy = Ty;
UR_OUT(" Uplevel Ref Level = " << Level << "\n");
if (Level == 0) { // Upreference should be resolved!
if (!TypeToResolve) {
TypeToResolve = UpRefs[i].UpRefTy;
} else {
UR_OUT(" * Resolving upreference for "
<< UpRefs[i].second->getDescription() << "\n";
std::string OldName = UpRefs[i].UpRefTy->getDescription());
UpRefs[i].UpRefTy->refineAbstractTypeTo(TypeToResolve);
UR_OUT(" * Type '" << OldName << "' refined upreference to: "
<< (const void*)Ty << ", " << Ty->getDescription() << "\n");
}
UpRefs.erase(UpRefs.begin()+i); // Remove from upreference list...
--i; // Do not skip the next element...
}
}
}
if (TypeToResolve) {
UR_OUT(" * Resolving upreference for "
<< UpRefs[i].second->getDescription() << "\n";
std::string OldName = TypeToResolve->getDescription());
TypeToResolve->refineAbstractTypeTo(Ty);
}
return Ty;
}
//===----------------------------------------------------------------------===//
// RunVMAsmParser - Define an interface to this parser
//===----------------------------------------------------------------------===//
//
static Module* RunParser(Module * M);
Module *llvm::RunVMAsmParser(const std::string &Filename, FILE *F) {
set_scan_file(F);
CurFilename = Filename;
return RunParser(new Module(CurFilename));
}
Module *llvm::RunVMAsmParser(const char * AsmString, Module * M) {
set_scan_string(AsmString);
CurFilename = "from_memory";
if (M == NULL) {
return RunParser(new Module (CurFilename));
} else {
return RunParser(M);
}
}
%}
%union {
llvm::Module *ModuleVal;
llvm::Function *FunctionVal;
llvm::BasicBlock *BasicBlockVal;
llvm::TerminatorInst *TermInstVal;
llvm::Instruction *InstVal;
llvm::Constant *ConstVal;
const llvm::Type *PrimType;
std::list<llvm::PATypeHolder> *TypeList;
llvm::PATypeHolder *TypeVal;
llvm::Value *ValueVal;
std::vector<llvm::Value*> *ValueList;
llvm::ArgListType *ArgList;
llvm::TypeWithAttrs TypeWithAttrs;
llvm::TypeWithAttrsList *TypeWithAttrsList;
llvm::ValueRefList *ValueRefList;
// Represent the RHS of PHI node
std::list<std::pair<llvm::Value*,
llvm::BasicBlock*> > *PHIList;
std::vector<std::pair<llvm::Constant*, llvm::BasicBlock*> > *JumpTable;
std::vector<llvm::Constant*> *ConstVector;
llvm::GlobalValue::LinkageTypes Linkage;
llvm::GlobalValue::VisibilityTypes Visibility;
uint16_t ParamAttrs;
llvm::APInt *APIntVal;
int64_t SInt64Val;
uint64_t UInt64Val;
int SIntVal;
unsigned UIntVal;
llvm::APFloat *FPVal;
bool BoolVal;
std::string *StrVal; // This memory must be deleted
llvm::ValID ValIDVal;
llvm::Instruction::BinaryOps BinaryOpVal;
llvm::Instruction::TermOps TermOpVal;
llvm::Instruction::MemoryOps MemOpVal;
llvm::Instruction::CastOps CastOpVal;
llvm::Instruction::OtherOps OtherOpVal;
llvm::ICmpInst::Predicate IPredicate;
llvm::FCmpInst::Predicate FPredicate;
}
%type <ModuleVal> Module
%type <FunctionVal> Function FunctionProto FunctionHeader BasicBlockList
%type <BasicBlockVal> BasicBlock InstructionList
%type <TermInstVal> BBTerminatorInst
%type <InstVal> Inst InstVal MemoryInst
%type <ConstVal> ConstVal ConstExpr AliaseeRef
%type <ConstVector> ConstVector
%type <ArgList> ArgList ArgListH
%type <PHIList> PHIList
%type <ValueRefList> ValueRefList // For call param lists & GEP indices
%type <ValueList> IndexList // For GEP indices
%type <TypeList> TypeListI
%type <TypeWithAttrsList> ArgTypeList ArgTypeListI
%type <TypeWithAttrs> ArgType
%type <JumpTable> JumpTable
%type <BoolVal> GlobalType // GLOBAL or CONSTANT?
%type <BoolVal> ThreadLocal // 'thread_local' or not
%type <BoolVal> OptVolatile // 'volatile' or not
%type <BoolVal> OptTailCall // TAIL CALL or plain CALL.
%type <BoolVal> OptSideEffect // 'sideeffect' or not.
%type <Linkage> GVInternalLinkage GVExternalLinkage
%type <Linkage> FunctionDefineLinkage FunctionDeclareLinkage
%type <Linkage> AliasLinkage
%type <Visibility> GVVisibilityStyle
// ValueRef - Unresolved reference to a definition or BB
%type <ValIDVal> ValueRef ConstValueRef SymbolicValueRef
%type <ValueVal> ResolvedVal // <type> <valref> pair
// Tokens and types for handling constant integer values
//
// ESINT64VAL - A negative number within long long range
%token <SInt64Val> ESINT64VAL
// EUINT64VAL - A positive number within uns. long long range
%token <UInt64Val> EUINT64VAL
// ESAPINTVAL - A negative number with arbitrary precision
%token <APIntVal> ESAPINTVAL
// EUAPINTVAL - A positive number with arbitrary precision
%token <APIntVal> EUAPINTVAL
%token <UIntVal> LOCALVAL_ID GLOBALVAL_ID // %123 @123
%token <FPVal> FPVAL // Float or Double constant
// Built in types...
%type <TypeVal> Types ResultTypes
%type <PrimType> IntType FPType PrimType // Classifications
%token <PrimType> VOID INTTYPE
%token <PrimType> FLOAT DOUBLE X86_FP80 FP128 PPC_FP128 LABEL
%token TYPE
%token<StrVal> LOCALVAR GLOBALVAR LABELSTR
%token<StrVal> STRINGCONSTANT ATSTRINGCONSTANT PCTSTRINGCONSTANT
%type <StrVal> LocalName OptLocalName OptLocalAssign
%type <StrVal> GlobalName OptGlobalAssign GlobalAssign
%type <StrVal> OptSection SectionString
%type <UIntVal> OptAlign OptCAlign
%token ZEROINITIALIZER TRUETOK FALSETOK BEGINTOK ENDTOK
%token DECLARE DEFINE GLOBAL CONSTANT SECTION ALIAS VOLATILE THREAD_LOCAL
%token TO DOTDOTDOT NULL_TOK UNDEF INTERNAL LINKONCE WEAK APPENDING
%token DLLIMPORT DLLEXPORT EXTERN_WEAK
%token OPAQUE EXTERNAL TARGET TRIPLE ALIGN
%token DEPLIBS CALL TAIL ASM_TOK MODULE SIDEEFFECT
%token CC_TOK CCC_TOK FASTCC_TOK COLDCC_TOK X86_STDCALLCC_TOK X86_FASTCALLCC_TOK
%token DATALAYOUT
%type <UIntVal> OptCallingConv
%type <ParamAttrs> OptParamAttrs ParamAttr
%type <ParamAttrs> OptFuncAttrs FuncAttr
// Basic Block Terminating Operators
%token <TermOpVal> RET BR SWITCH INVOKE UNWIND UNREACHABLE
// Binary Operators
%type <BinaryOpVal> ArithmeticOps LogicalOps // Binops Subcatagories
%token <BinaryOpVal> ADD SUB MUL UDIV SDIV FDIV UREM SREM FREM AND OR XOR
%token <BinaryOpVal> SHL LSHR ASHR
%token <OtherOpVal> ICMP FCMP
%type <IPredicate> IPredicates
%type <FPredicate> FPredicates
%token EQ NE SLT SGT SLE SGE ULT UGT ULE UGE
%token OEQ ONE OLT OGT OLE OGE ORD UNO UEQ UNE
// Memory Instructions
%token <MemOpVal> MALLOC ALLOCA FREE LOAD STORE GETELEMENTPTR
// Cast Operators
%type <CastOpVal> CastOps
%token <CastOpVal> TRUNC ZEXT SEXT FPTRUNC FPEXT BITCAST
%token <CastOpVal> UITOFP SITOFP FPTOUI FPTOSI INTTOPTR PTRTOINT
// Other Operators
%token <OtherOpVal> PHI_TOK SELECT VAARG
%token <OtherOpVal> EXTRACTELEMENT INSERTELEMENT SHUFFLEVECTOR
// Function Attributes
%token SIGNEXT ZEROEXT NORETURN INREG SRET NOUNWIND NOALIAS BYVAL NEST
// Visibility Styles
%token DEFAULT HIDDEN PROTECTED
%start Module
%%
// Operations that are notably excluded from this list include:
// RET, BR, & SWITCH because they end basic blocks and are treated specially.
//
ArithmeticOps: ADD | SUB | MUL | UDIV | SDIV | FDIV | UREM | SREM | FREM;
LogicalOps : SHL | LSHR | ASHR | AND | OR | XOR;
CastOps : TRUNC | ZEXT | SEXT | FPTRUNC | FPEXT | BITCAST |
UITOFP | SITOFP | FPTOUI | FPTOSI | INTTOPTR | PTRTOINT;
IPredicates
: EQ { $$ = ICmpInst::ICMP_EQ; } | NE { $$ = ICmpInst::ICMP_NE; }
| SLT { $$ = ICmpInst::ICMP_SLT; } | SGT { $$ = ICmpInst::ICMP_SGT; }
| SLE { $$ = ICmpInst::ICMP_SLE; } | SGE { $$ = ICmpInst::ICMP_SGE; }
| ULT { $$ = ICmpInst::ICMP_ULT; } | UGT { $$ = ICmpInst::ICMP_UGT; }
| ULE { $$ = ICmpInst::ICMP_ULE; } | UGE { $$ = ICmpInst::ICMP_UGE; }
;
FPredicates
: OEQ { $$ = FCmpInst::FCMP_OEQ; } | ONE { $$ = FCmpInst::FCMP_ONE; }
| OLT { $$ = FCmpInst::FCMP_OLT; } | OGT { $$ = FCmpInst::FCMP_OGT; }
| OLE { $$ = FCmpInst::FCMP_OLE; } | OGE { $$ = FCmpInst::FCMP_OGE; }
| ORD { $$ = FCmpInst::FCMP_ORD; } | UNO { $$ = FCmpInst::FCMP_UNO; }
| UEQ { $$ = FCmpInst::FCMP_UEQ; } | UNE { $$ = FCmpInst::FCMP_UNE; }
| ULT { $$ = FCmpInst::FCMP_ULT; } | UGT { $$ = FCmpInst::FCMP_UGT; }
| ULE { $$ = FCmpInst::FCMP_ULE; } | UGE { $$ = FCmpInst::FCMP_UGE; }
| TRUETOK { $$ = FCmpInst::FCMP_TRUE; }
| FALSETOK { $$ = FCmpInst::FCMP_FALSE; }
;
// These are some types that allow classification if we only want a particular
// thing... for example, only a signed, unsigned, or integral type.
IntType : INTTYPE;
FPType : FLOAT | DOUBLE | PPC_FP128 | FP128 | X86_FP80;
LocalName : LOCALVAR | STRINGCONSTANT | PCTSTRINGCONSTANT ;
OptLocalName : LocalName | /*empty*/ { $$ = 0; };
/// OptLocalAssign - Value producing statements have an optional assignment
/// component.
OptLocalAssign : LocalName '=' {
$$ = $1;
CHECK_FOR_ERROR
}
| /*empty*/ {
$$ = 0;
CHECK_FOR_ERROR
};
GlobalName : GLOBALVAR | ATSTRINGCONSTANT ;
OptGlobalAssign : GlobalAssign
| /*empty*/ {
$$ = 0;
CHECK_FOR_ERROR
};
GlobalAssign : GlobalName '=' {
$$ = $1;
CHECK_FOR_ERROR
};
GVInternalLinkage
: INTERNAL { $$ = GlobalValue::InternalLinkage; }
| WEAK { $$ = GlobalValue::WeakLinkage; }
| LINKONCE { $$ = GlobalValue::LinkOnceLinkage; }
| APPENDING { $$ = GlobalValue::AppendingLinkage; }
| DLLEXPORT { $$ = GlobalValue::DLLExportLinkage; }
;
GVExternalLinkage
: DLLIMPORT { $$ = GlobalValue::DLLImportLinkage; }
| EXTERN_WEAK { $$ = GlobalValue::ExternalWeakLinkage; }
| EXTERNAL { $$ = GlobalValue::ExternalLinkage; }
;
GVVisibilityStyle
: /*empty*/ { $$ = GlobalValue::DefaultVisibility; }
| DEFAULT { $$ = GlobalValue::DefaultVisibility; }
| HIDDEN { $$ = GlobalValue::HiddenVisibility; }
| PROTECTED { $$ = GlobalValue::ProtectedVisibility; }
;
FunctionDeclareLinkage
: /*empty*/ { $$ = GlobalValue::ExternalLinkage; }
| DLLIMPORT { $$ = GlobalValue::DLLImportLinkage; }
| EXTERN_WEAK { $$ = GlobalValue::ExternalWeakLinkage; }
;
FunctionDefineLinkage
: /*empty*/ { $$ = GlobalValue::ExternalLinkage; }
| INTERNAL { $$ = GlobalValue::InternalLinkage; }
| LINKONCE { $$ = GlobalValue::LinkOnceLinkage; }
| WEAK { $$ = GlobalValue::WeakLinkage; }
| DLLEXPORT { $$ = GlobalValue::DLLExportLinkage; }
;
AliasLinkage
: /*empty*/ { $$ = GlobalValue::ExternalLinkage; }
| WEAK { $$ = GlobalValue::WeakLinkage; }
| INTERNAL { $$ = GlobalValue::InternalLinkage; }
;
OptCallingConv : /*empty*/ { $$ = CallingConv::C; } |
CCC_TOK { $$ = CallingConv::C; } |
FASTCC_TOK { $$ = CallingConv::Fast; } |
COLDCC_TOK { $$ = CallingConv::Cold; } |
X86_STDCALLCC_TOK { $$ = CallingConv::X86_StdCall; } |
X86_FASTCALLCC_TOK { $$ = CallingConv::X86_FastCall; } |
CC_TOK EUINT64VAL {
if ((unsigned)$2 != $2)
GEN_ERROR("Calling conv too large");
$$ = $2;
CHECK_FOR_ERROR
};
ParamAttr : ZEROEXT { $$ = ParamAttr::ZExt; }
| ZEXT { $$ = ParamAttr::ZExt; }
| SIGNEXT { $$ = ParamAttr::SExt; }
| SEXT { $$ = ParamAttr::SExt; }
| INREG { $$ = ParamAttr::InReg; }
| SRET { $$ = ParamAttr::StructRet; }
| NOALIAS { $$ = ParamAttr::NoAlias; }
| BYVAL { $$ = ParamAttr::ByVal; }
| NEST { $$ = ParamAttr::Nest; }
;
OptParamAttrs : /* empty */ { $$ = ParamAttr::None; }
| OptParamAttrs ParamAttr {
$$ = $1 | $2;
}
;
FuncAttr : NORETURN { $$ = ParamAttr::NoReturn; }
| NOUNWIND { $$ = ParamAttr::NoUnwind; }
| ZEROEXT { $$ = ParamAttr::ZExt; }
| SIGNEXT { $$ = ParamAttr::SExt; }
;
OptFuncAttrs : /* empty */ { $$ = ParamAttr::None; }
| OptFuncAttrs FuncAttr {
$$ = $1 | $2;
}
;
// OptAlign/OptCAlign - An optional alignment, and an optional alignment with
// a comma before it.
OptAlign : /*empty*/ { $$ = 0; } |
ALIGN EUINT64VAL {
$$ = $2;
if ($$ != 0 && !isPowerOf2_32($$))
GEN_ERROR("Alignment must be a power of two");
CHECK_FOR_ERROR
};
OptCAlign : /*empty*/ { $$ = 0; } |
',' ALIGN EUINT64VAL {
$$ = $3;
if ($$ != 0 && !isPowerOf2_32($$))
GEN_ERROR("Alignment must be a power of two");
CHECK_FOR_ERROR
};
SectionString : SECTION STRINGCONSTANT {
for (unsigned i = 0, e = $2->length(); i != e; ++i)
if ((*$2)[i] == '"' || (*$2)[i] == '\\')
GEN_ERROR("Invalid character in section name");
$$ = $2;
CHECK_FOR_ERROR
};
OptSection : /*empty*/ { $$ = 0; } |
SectionString { $$ = $1; };
// GlobalVarAttributes - Used to pass the attributes string on a global. CurGV
// is set to be the global we are processing.
//
GlobalVarAttributes : /* empty */ {} |
',' GlobalVarAttribute GlobalVarAttributes {};
GlobalVarAttribute : SectionString {
CurGV->setSection(*$1);
delete $1;
CHECK_FOR_ERROR
}
| ALIGN EUINT64VAL {
if ($2 != 0 && !isPowerOf2_32($2))
GEN_ERROR("Alignment must be a power of two");
CurGV->setAlignment($2);
CHECK_FOR_ERROR
};
//===----------------------------------------------------------------------===//
// Types includes all predefined types... except void, because it can only be
// used in specific contexts (function returning void for example).
// Derived types are added later...
//
PrimType : INTTYPE | FLOAT | DOUBLE | PPC_FP128 | FP128 | X86_FP80 | LABEL ;
Types
: OPAQUE {
$$ = new PATypeHolder(OpaqueType::get());
CHECK_FOR_ERROR
}
| PrimType {
$$ = new PATypeHolder($1);
CHECK_FOR_ERROR
}
| Types '*' { // Pointer type?
if (*$1 == Type::LabelTy)
GEN_ERROR("Cannot form a pointer to a basic block");
$$ = new PATypeHolder(HandleUpRefs(PointerType::get(*$1)));
delete $1;
CHECK_FOR_ERROR
}
| SymbolicValueRef { // Named types are also simple types...
const Type* tmp = getTypeVal($1);
CHECK_FOR_ERROR
$$ = new PATypeHolder(tmp);
}
| '\\' EUINT64VAL { // Type UpReference
if ($2 > (uint64_t)~0U) GEN_ERROR("Value out of range");
OpaqueType *OT = OpaqueType::get(); // Use temporary placeholder
UpRefs.push_back(UpRefRecord((unsigned)$2, OT)); // Add to vector...
$$ = new PATypeHolder(OT);
UR_OUT("New Upreference!\n");
CHECK_FOR_ERROR
}
| Types '(' ArgTypeListI ')' OptFuncAttrs {
std::vector<const Type*> Params;
ParamAttrsVector Attrs;
if ($5 != ParamAttr::None) {
ParamAttrsWithIndex X; X.index = 0; X.attrs = $5;
Attrs.push_back(X);
}
unsigned index = 1;
TypeWithAttrsList::iterator I = $3->begin(), E = $3->end();
for (; I != E; ++I, ++index) {
const Type *Ty = I->Ty->get();
Params.push_back(Ty);
if (Ty != Type::VoidTy)
if (I->Attrs != ParamAttr::None) {
ParamAttrsWithIndex X; X.index = index; X.attrs = I->Attrs;
Attrs.push_back(X);
}
}
bool isVarArg = Params.size() && Params.back() == Type::VoidTy;
if (isVarArg) Params.pop_back();
ParamAttrsList *ActualAttrs = 0;
if (!Attrs.empty())
ActualAttrs = ParamAttrsList::get(Attrs);
FunctionType *FT = FunctionType::get(*$1, Params, isVarArg, ActualAttrs);
delete $3; // Delete the argument list
delete $1; // Delete the return type handle
$$ = new PATypeHolder(HandleUpRefs(FT));
CHECK_FOR_ERROR
}
| VOID '(' ArgTypeListI ')' OptFuncAttrs {
std::vector<const Type*> Params;
ParamAttrsVector Attrs;
if ($5 != ParamAttr::None) {
ParamAttrsWithIndex X; X.index = 0; X.attrs = $5;
Attrs.push_back(X);
}
TypeWithAttrsList::iterator I = $3->begin(), E = $3->end();
unsigned index = 1;
for ( ; I != E; ++I, ++index) {
const Type* Ty = I->Ty->get();
Params.push_back(Ty);
if (Ty != Type::VoidTy)
if (I->Attrs != ParamAttr::None) {
ParamAttrsWithIndex X; X.index = index; X.attrs = I->Attrs;
Attrs.push_back(X);
}
}
bool isVarArg = Params.size() && Params.back() == Type::VoidTy;
if (isVarArg) Params.pop_back();
ParamAttrsList *ActualAttrs = 0;
if (!Attrs.empty())
ActualAttrs = ParamAttrsList::get(Attrs);
FunctionType *FT = FunctionType::get($1, Params, isVarArg, ActualAttrs);
delete $3; // Delete the argument list
$$ = new PATypeHolder(HandleUpRefs(FT));
CHECK_FOR_ERROR
}
| '[' EUINT64VAL 'x' Types ']' { // Sized array type?
$$ = new PATypeHolder(HandleUpRefs(ArrayType::get(*$4, (unsigned)$2)));
delete $4;
CHECK_FOR_ERROR
}
| '<' EUINT64VAL 'x' Types '>' { // Vector type?
const llvm::Type* ElemTy = $4->get();
if ((unsigned)$2 != $2)
GEN_ERROR("Unsigned result not equal to signed result");
if (!ElemTy->isFloatingPoint() && !ElemTy->isInteger())
GEN_ERROR("Element type of a VectorType must be primitive");
if (!isPowerOf2_32($2))
GEN_ERROR("Vector length should be a power of 2");
$$ = new PATypeHolder(HandleUpRefs(VectorType::get(*$4, (unsigned)$2)));
delete $4;
CHECK_FOR_ERROR
}
| '{' TypeListI '}' { // Structure type?
std::vector<const Type*> Elements;
for (std::list<llvm::PATypeHolder>::iterator I = $2->begin(),
E = $2->end(); I != E; ++I)
Elements.push_back(*I);
$$ = new PATypeHolder(HandleUpRefs(StructType::get(Elements)));
delete $2;
CHECK_FOR_ERROR
}
| '{' '}' { // Empty structure type?
$$ = new PATypeHolder(StructType::get(std::vector<const Type*>()));
CHECK_FOR_ERROR
}
| '<' '{' TypeListI '}' '>' {
std::vector<const Type*> Elements;
for (std::list<llvm::PATypeHolder>::iterator I = $3->begin(),
E = $3->end(); I != E; ++I)
Elements.push_back(*I);
$$ = new PATypeHolder(HandleUpRefs(StructType::get(Elements, true)));
delete $3;
CHECK_FOR_ERROR
}
| '<' '{' '}' '>' { // Empty structure type?
$$ = new PATypeHolder(StructType::get(std::vector<const Type*>(), true));
CHECK_FOR_ERROR
}
;
ArgType
: Types OptParamAttrs {
$$.Ty = $1;
$$.Attrs = $2;
}
;
ResultTypes
: Types {
if (!UpRefs.empty())
GEN_ERROR("Invalid upreference in type: " + (*$1)->getDescription());
if (!(*$1)->isFirstClassType())
GEN_ERROR("LLVM functions cannot return aggregate types");
$$ = $1;
}
| VOID {
$$ = new PATypeHolder(Type::VoidTy);
}
;
ArgTypeList : ArgType {
$$ = new TypeWithAttrsList();
$$->push_back($1);
CHECK_FOR_ERROR
}
| ArgTypeList ',' ArgType {
($$=$1)->push_back($3);
CHECK_FOR_ERROR
}
;
ArgTypeListI
: ArgTypeList
| ArgTypeList ',' DOTDOTDOT {
$$=$1;
TypeWithAttrs TWA; TWA.Attrs = ParamAttr::None;
TWA.Ty = new PATypeHolder(Type::VoidTy);
$$->push_back(TWA);
CHECK_FOR_ERROR
}
| DOTDOTDOT {
$$ = new TypeWithAttrsList;
TypeWithAttrs TWA; TWA.Attrs = ParamAttr::None;
TWA.Ty = new PATypeHolder(Type::VoidTy);
$$->push_back(TWA);
CHECK_FOR_ERROR
}
| /*empty*/ {
$$ = new TypeWithAttrsList();
CHECK_FOR_ERROR
};
// TypeList - Used for struct declarations and as a basis for function type
// declaration type lists
//
TypeListI : Types {
$$ = new std::list<PATypeHolder>();
$$->push_back(*$1);
delete $1;
CHECK_FOR_ERROR
}
| TypeListI ',' Types {
($$=$1)->push_back(*$3);
delete $3;
CHECK_FOR_ERROR
};
// ConstVal - The various declarations that go into the constant pool. This
// production is used ONLY to represent constants that show up AFTER a 'const',
// 'constant' or 'global' token at global scope. Constants that can be inlined
// into other expressions (such as integers and constexprs) are handled by the
// ResolvedVal, ValueRef and ConstValueRef productions.
//
ConstVal: Types '[' ConstVector ']' { // Nonempty unsized arr
if (!UpRefs.empty())
GEN_ERROR("Invalid upreference in type: " + (*$1)->getDescription());
const ArrayType *ATy = dyn_cast<ArrayType>($1->get());
if (ATy == 0)
GEN_ERROR("Cannot make array constant with type: '" +
(*$1)->getDescription() + "'");
const Type *ETy = ATy->getElementType();
int NumElements = ATy->getNumElements();
// Verify that we have the correct size...
if (NumElements != -1 && NumElements != (int)$3->size())
GEN_ERROR("Type mismatch: constant sized array initialized with " +
utostr($3->size()) + " arguments, but has size of " +
itostr(NumElements) + "");
// Verify all elements are correct type!
for (unsigned i = 0; i < $3->size(); i++) {
if (ETy != (*$3)[i]->getType())
GEN_ERROR("Element #" + utostr(i) + " is not of type '" +
ETy->getDescription() +"' as required!\nIt is of type '"+
(*$3)[i]->getType()->getDescription() + "'.");
}
$$ = ConstantArray::get(ATy, *$3);
delete $1; delete $3;
CHECK_FOR_ERROR
}
| Types '[' ']' {
if (!UpRefs.empty())
GEN_ERROR("Invalid upreference in type: " + (*$1)->getDescription());
const ArrayType *ATy = dyn_cast<ArrayType>($1->get());
if (ATy == 0)
GEN_ERROR("Cannot make array constant with type: '" +
(*$1)->getDescription() + "'");
int NumElements = ATy->getNumElements();
if (NumElements != -1 && NumElements != 0)
GEN_ERROR("Type mismatch: constant sized array initialized with 0"
" arguments, but has size of " + itostr(NumElements) +"");
$$ = ConstantArray::get(ATy, std::vector<Constant*>());
delete $1;
CHECK_FOR_ERROR
}
| Types 'c' STRINGCONSTANT {
if (!UpRefs.empty())
GEN_ERROR("Invalid upreference in type: " + (*$1)->getDescription());
const ArrayType *ATy = dyn_cast<ArrayType>($1->get());
if (ATy == 0)
GEN_ERROR("Cannot make array constant with type: '" +
(*$1)->getDescription() + "'");
int NumElements = ATy->getNumElements();
const Type *ETy = ATy->getElementType();
if (NumElements != -1 && NumElements != int($3->length()))
GEN_ERROR("Can't build string constant of size " +
itostr((int)($3->length())) +
" when array has size " + itostr(NumElements) + "");
std::vector<Constant*> Vals;
if (ETy == Type::Int8Ty) {
for (unsigned i = 0; i < $3->length(); ++i)
Vals.push_back(ConstantInt::get(ETy, (*$3)[i]));
} else {
delete $3;
GEN_ERROR("Cannot build string arrays of non byte sized elements");
}
delete $3;
$$ = ConstantArray::get(ATy, Vals);
delete $1;
CHECK_FOR_ERROR
}
| Types '<' ConstVector '>' { // Nonempty unsized arr
if (!UpRefs.empty())
GEN_ERROR("Invalid upreference in type: " + (*$1)->getDescription());
const VectorType *PTy = dyn_cast<VectorType>($1->get());
if (PTy == 0)
GEN_ERROR("Cannot make packed constant with type: '" +
(*$1)->getDescription() + "'");
const Type *ETy = PTy->getElementType();
int NumElements = PTy->getNumElements();
// Verify that we have the correct size...
if (NumElements != -1 && NumElements != (int)$3->size())
GEN_ERROR("Type mismatch: constant sized packed initialized with " +
utostr($3->size()) + " arguments, but has size of " +
itostr(NumElements) + "");
// Verify all elements are correct type!
for (unsigned i = 0; i < $3->size(); i++) {
if (ETy != (*$3)[i]->getType())
GEN_ERROR("Element #" + utostr(i) + " is not of type '" +
ETy->getDescription() +"' as required!\nIt is of type '"+
(*$3)[i]->getType()->getDescription() + "'.");
}
$$ = ConstantVector::get(PTy, *$3);
delete $1; delete $3;
CHECK_FOR_ERROR
}
| Types '{' ConstVector '}' {
const StructType *STy = dyn_cast<StructType>($1->get());
if (STy == 0)
GEN_ERROR("Cannot make struct constant with type: '" +
(*$1)->getDescription() + "'");
if ($3->size() != STy->getNumContainedTypes())
GEN_ERROR("Illegal number of initializers for structure type");
// Check to ensure that constants are compatible with the type initializer!
for (unsigned i = 0, e = $3->size(); i != e; ++i)
if ((*$3)[i]->getType() != STy->getElementType(i))
GEN_ERROR("Expected type '" +
STy->getElementType(i)->getDescription() +
"' for element #" + utostr(i) +
" of structure initializer");
// Check to ensure that Type is not packed
if (STy->isPacked())
GEN_ERROR("Unpacked Initializer to vector type '" +
STy->getDescription() + "'");
$$ = ConstantStruct::get(STy, *$3);
delete $1; delete $3;
CHECK_FOR_ERROR
}
| Types '{' '}' {
if (!UpRefs.empty())
GEN_ERROR("Invalid upreference in type: " + (*$1)->getDescription());
const StructType *STy = dyn_cast<StructType>($1->get());
if (STy == 0)
GEN_ERROR("Cannot make struct constant with type: '" +
(*$1)->getDescription() + "'");
if (STy->getNumContainedTypes() != 0)
GEN_ERROR("Illegal number of initializers for structure type");
// Check to ensure that Type is not packed
if (STy->isPacked())
GEN_ERROR("Unpacked Initializer to vector type '" +
STy->getDescription() + "'");
$$ = ConstantStruct::get(STy, std::vector<Constant*>());
delete $1;
CHECK_FOR_ERROR
}
| Types '<' '{' ConstVector '}' '>' {
const StructType *STy = dyn_cast<StructType>($1->get());
if (STy == 0)
GEN_ERROR("Cannot make struct constant with type: '" +
(*$1)->getDescription() + "'");
if ($4->size() != STy->getNumContainedTypes())
GEN_ERROR("Illegal number of initializers for structure type");
// Check to ensure that constants are compatible with the type initializer!
for (unsigned i = 0, e = $4->size(); i != e; ++i)
if ((*$4)[i]->getType() != STy->getElementType(i))
GEN_ERROR("Expected type '" +
STy->getElementType(i)->getDescription() +
"' for element #" + utostr(i) +
" of structure initializer");
// Check to ensure that Type is packed
if (!STy->isPacked())
GEN_ERROR("Vector initializer to non-vector type '" +
STy->getDescription() + "'");
$$ = ConstantStruct::get(STy, *$4);
delete $1; delete $4;
CHECK_FOR_ERROR
}
| Types '<' '{' '}' '>' {
if (!UpRefs.empty())
GEN_ERROR("Invalid upreference in type: " + (*$1)->getDescription());
const StructType *STy = dyn_cast<StructType>($1->get());
if (STy == 0)
GEN_ERROR("Cannot make struct constant with type: '" +
(*$1)->getDescription() + "'");
if (STy->getNumContainedTypes() != 0)
GEN_ERROR("Illegal number of initializers for structure type");
// Check to ensure that Type is packed
if (!STy->isPacked())
GEN_ERROR("Vector initializer to non-vector type '" +
STy->getDescription() + "'");
$$ = ConstantStruct::get(STy, std::vector<Constant*>());
delete $1;
CHECK_FOR_ERROR
}
| Types NULL_TOK {
if (!UpRefs.empty())
GEN_ERROR("Invalid upreference in type: " + (*$1)->getDescription());
const PointerType *PTy = dyn_cast<PointerType>($1->get());
if (PTy == 0)
GEN_ERROR("Cannot make null pointer constant with type: '" +
(*$1)->getDescription() + "'");
$$ = ConstantPointerNull::get(PTy);
delete $1;
CHECK_FOR_ERROR
}
| Types UNDEF {
if (!UpRefs.empty())
GEN_ERROR("Invalid upreference in type: " + (*$1)->getDescription());
$$ = UndefValue::get($1->get());
delete $1;
CHECK_FOR_ERROR
}
| Types SymbolicValueRef {
if (!UpRefs.empty())
GEN_ERROR("Invalid upreference in type: " + (*$1)->getDescription());
const PointerType *Ty = dyn_cast<PointerType>($1->get());
if (Ty == 0)
GEN_ERROR("Global const reference must be a pointer type");
// ConstExprs can exist in the body of a function, thus creating
// GlobalValues whenever they refer to a variable. Because we are in
// the context of a function, getExistingVal will search the functions
// symbol table instead of the module symbol table for the global symbol,
// which throws things all off. To get around this, we just tell
// getExistingVal that we are at global scope here.
//
Function *SavedCurFn = CurFun.CurrentFunction;
CurFun.CurrentFunction = 0;
Value *V = getExistingVal(Ty, $2);
CHECK_FOR_ERROR
CurFun.CurrentFunction = SavedCurFn;
// If this is an initializer for a constant pointer, which is referencing a
// (currently) undefined variable, create a stub now that shall be replaced
// in the future with the right type of variable.
//
if (V == 0) {
assert(isa<PointerType>(Ty) && "Globals may only be used as pointers!");
const PointerType *PT = cast<PointerType>(Ty);
// First check to see if the forward references value is already created!
PerModuleInfo::GlobalRefsType::iterator I =
CurModule.GlobalRefs.find(std::make_pair(PT, $2));
if (I != CurModule.GlobalRefs.end()) {
V = I->second; // Placeholder already exists, use it...
$2.destroy();
} else {
std::string Name;
if ($2.Type == ValID::GlobalName)
Name = $2.getName();
else if ($2.Type != ValID::GlobalID)
GEN_ERROR("Invalid reference to global");
// Create the forward referenced global.
GlobalValue *GV;
if (const FunctionType *FTy =
dyn_cast<FunctionType>(PT->getElementType())) {
GV = new Function(FTy, GlobalValue::ExternalWeakLinkage, Name,
CurModule.CurrentModule);
} else {
GV = new GlobalVariable(PT->getElementType(), false,
GlobalValue::ExternalWeakLinkage, 0,
Name, CurModule.CurrentModule);
}
// Keep track of the fact that we have a forward ref to recycle it
CurModule.GlobalRefs.insert(std::make_pair(std::make_pair(PT, $2), GV));
V = GV;
}
}
$$ = cast<GlobalValue>(V);
delete $1; // Free the type handle
CHECK_FOR_ERROR
}
| Types ConstExpr {
if (!UpRefs.empty())
GEN_ERROR("Invalid upreference in type: " + (*$1)->getDescription());
if ($1->get() != $2->getType())
GEN_ERROR("Mismatched types for constant expression: " +
(*$1)->getDescription() + " and " + $2->getType()->getDescription());
$$ = $2;
delete $1;
CHECK_FOR_ERROR
}
| Types ZEROINITIALIZER {
if (!UpRefs.empty())
GEN_ERROR("Invalid upreference in type: " + (*$1)->getDescription());
const Type *Ty = $1->get();
if (isa<FunctionType>(Ty) || Ty == Type::LabelTy || isa<OpaqueType>(Ty))
GEN_ERROR("Cannot create a null initialized value of this type");
$$ = Constant::getNullValue(Ty);
delete $1;
CHECK_FOR_ERROR
}
| IntType ESINT64VAL { // integral constants
if (!ConstantInt::isValueValidForType($1, $2))
GEN_ERROR("Constant value doesn't fit in type");
$$ = ConstantInt::get($1, $2, true);
CHECK_FOR_ERROR
}
| IntType ESAPINTVAL { // arbitrary precision integer constants
uint32_t BitWidth = cast<IntegerType>($1)->getBitWidth();
if ($2->getBitWidth() > BitWidth) {
GEN_ERROR("Constant value does not fit in type");
}
$2->sextOrTrunc(BitWidth);
$$ = ConstantInt::get(*$2);
delete $2;
CHECK_FOR_ERROR
}
| IntType EUINT64VAL { // integral constants
if (!ConstantInt::isValueValidForType($1, $2))
GEN_ERROR("Constant value doesn't fit in type");
$$ = ConstantInt::get($1, $2, false);
CHECK_FOR_ERROR
}
| IntType EUAPINTVAL { // arbitrary precision integer constants
uint32_t BitWidth = cast<IntegerType>($1)->getBitWidth();
if ($2->getBitWidth() > BitWidth) {
GEN_ERROR("Constant value does not fit in type");
}
$2->zextOrTrunc(BitWidth);
$$ = ConstantInt::get(*$2);
delete $2;
CHECK_FOR_ERROR
}
| INTTYPE TRUETOK { // Boolean constants
assert(cast<IntegerType>($1)->getBitWidth() == 1 && "Not Bool?");
$$ = ConstantInt::getTrue();
CHECK_FOR_ERROR
}
| INTTYPE FALSETOK { // Boolean constants
assert(cast<IntegerType>($1)->getBitWidth() == 1 && "Not Bool?");
$$ = ConstantInt::getFalse();
CHECK_FOR_ERROR
}
| FPType FPVAL { // Floating point constants
if (!ConstantFP::isValueValidForType($1, *$2))
GEN_ERROR("Floating point constant invalid for type");
// Lexer has no type info, so builds all float and double FP constants
// as double. Fix this here. Long double is done right.
if (&$2->getSemantics()==&APFloat::IEEEdouble && $1==Type::FloatTy)
$2->convert(APFloat::IEEEsingle, APFloat::rmNearestTiesToEven);
$$ = ConstantFP::get($1, *$2);
delete $2;
CHECK_FOR_ERROR
};
ConstExpr: CastOps '(' ConstVal TO Types ')' {
if (!UpRefs.empty())
GEN_ERROR("Invalid upreference in type: " + (*$5)->getDescription());
Constant *Val = $3;
const Type *DestTy = $5->get();
if (!CastInst::castIsValid($1, $3, DestTy))
GEN_ERROR("invalid cast opcode for cast from '" +
Val->getType()->getDescription() + "' to '" +
DestTy->getDescription() + "'");
$$ = ConstantExpr::getCast($1, $3, DestTy);
delete $5;
}
| GETELEMENTPTR '(' ConstVal IndexList ')' {
if (!isa<PointerType>($3->getType()))
GEN_ERROR("GetElementPtr requires a pointer operand");
const Type *IdxTy =
GetElementPtrInst::getIndexedType($3->getType(), $4->begin(), $4->end(),
true);
if (!IdxTy)
GEN_ERROR("Index list invalid for constant getelementptr");
SmallVector<Constant*, 8> IdxVec;
for (unsigned i = 0, e = $4->size(); i != e; ++i)
if (Constant *C = dyn_cast<Constant>((*$4)[i]))
IdxVec.push_back(C);
else
GEN_ERROR("Indices to constant getelementptr must be constants");
delete $4;
$$ = ConstantExpr::getGetElementPtr($3, &IdxVec[0], IdxVec.size());
CHECK_FOR_ERROR
}
| SELECT '(' ConstVal ',' ConstVal ',' ConstVal ')' {
if ($3->getType() != Type::Int1Ty)
GEN_ERROR("Select condition must be of boolean type");
if ($5->getType() != $7->getType())
GEN_ERROR("Select operand types must match");
$$ = ConstantExpr::getSelect($3, $5, $7);
CHECK_FOR_ERROR
}
| ArithmeticOps '(' ConstVal ',' ConstVal ')' {
if ($3->getType() != $5->getType())
GEN_ERROR("Binary operator types must match");
CHECK_FOR_ERROR;
$$ = ConstantExpr::get($1, $3, $5);
}
| LogicalOps '(' ConstVal ',' ConstVal ')' {
if ($3->getType() != $5->getType())
GEN_ERROR("Logical operator types must match");
if (!$3->getType()->isInteger()) {
if (Instruction::isShift($1) || !isa<VectorType>($3->getType()) ||
!cast<VectorType>($3->getType())->getElementType()->isInteger())
GEN_ERROR("Logical operator requires integral operands");
}
$$ = ConstantExpr::get($1, $3, $5);
CHECK_FOR_ERROR
}
| ICMP IPredicates '(' ConstVal ',' ConstVal ')' {
if ($4->getType() != $6->getType())
GEN_ERROR("icmp operand types must match");
$$ = ConstantExpr::getICmp($2, $4, $6);
}
| FCMP FPredicates '(' ConstVal ',' ConstVal ')' {
if ($4->getType() != $6->getType())
GEN_ERROR("fcmp operand types must match");
$$ = ConstantExpr::getFCmp($2, $4, $6);
}
| EXTRACTELEMENT '(' ConstVal ',' ConstVal ')' {
if (!ExtractElementInst::isValidOperands($3, $5))
GEN_ERROR("Invalid extractelement operands");
$$ = ConstantExpr::getExtractElement($3, $5);
CHECK_FOR_ERROR
}
| INSERTELEMENT '(' ConstVal ',' ConstVal ',' ConstVal ')' {
if (!InsertElementInst::isValidOperands($3, $5, $7))
GEN_ERROR("Invalid insertelement operands");
$$ = ConstantExpr::getInsertElement($3, $5, $7);
CHECK_FOR_ERROR
}
| SHUFFLEVECTOR '(' ConstVal ',' ConstVal ',' ConstVal ')' {
if (!ShuffleVectorInst::isValidOperands($3, $5, $7))
GEN_ERROR("Invalid shufflevector operands");
$$ = ConstantExpr::getShuffleVector($3, $5, $7);
CHECK_FOR_ERROR
};
// ConstVector - A list of comma separated constants.
ConstVector : ConstVector ',' ConstVal {
($$ = $1)->push_back($3);
CHECK_FOR_ERROR
}
| ConstVal {
$$ = new std::vector<Constant*>();
$$->push_back($1);
CHECK_FOR_ERROR
};
// GlobalType - Match either GLOBAL or CONSTANT for global declarations...
GlobalType : GLOBAL { $$ = false; } | CONSTANT { $$ = true; };
// ThreadLocal
ThreadLocal : THREAD_LOCAL { $$ = true; } | { $$ = false; };
// AliaseeRef - Match either GlobalValue or bitcast to GlobalValue.
AliaseeRef : ResultTypes SymbolicValueRef {
const Type* VTy = $1->get();
Value *V = getVal(VTy, $2);
CHECK_FOR_ERROR
GlobalValue* Aliasee = dyn_cast<GlobalValue>(V);
if (!Aliasee)
GEN_ERROR("Aliases can be created only to global values");
$$ = Aliasee;
CHECK_FOR_ERROR
delete $1;
}
| BITCAST '(' AliaseeRef TO Types ')' {
Constant *Val = $3;
const Type *DestTy = $5->get();
if (!CastInst::castIsValid($1, $3, DestTy))
GEN_ERROR("invalid cast opcode for cast from '" +
Val->getType()->getDescription() + "' to '" +
DestTy->getDescription() + "'");
$$ = ConstantExpr::getCast($1, $3, DestTy);
CHECK_FOR_ERROR
delete $5;
};
//===----------------------------------------------------------------------===//
// Rules to match Modules
//===----------------------------------------------------------------------===//
// Module rule: Capture the result of parsing the whole file into a result
// variable...
//
Module
: DefinitionList {
$$ = ParserResult = CurModule.CurrentModule;
CurModule.ModuleDone();
CHECK_FOR_ERROR;
}
| /*empty*/ {
$$ = ParserResult = CurModule.CurrentModule;
CurModule.ModuleDone();
CHECK_FOR_ERROR;
}
;
DefinitionList
: Definition
| DefinitionList Definition
;
Definition
: DEFINE { CurFun.isDeclare = false; } Function {
CurFun.FunctionDone();
CHECK_FOR_ERROR
}
| DECLARE { CurFun.isDeclare = true; } FunctionProto {
CHECK_FOR_ERROR
}
| MODULE ASM_TOK AsmBlock {
CHECK_FOR_ERROR
}
| OptLocalAssign TYPE Types {
if (!UpRefs.empty())
GEN_ERROR("Invalid upreference in type: " + (*$3)->getDescription());
// Eagerly resolve types. This is not an optimization, this is a
// requirement that is due to the fact that we could have this:
//
// %list = type { %list * }
// %list = type { %list * } ; repeated type decl
//
// If types are not resolved eagerly, then the two types will not be
// determined to be the same type!
//
ResolveTypeTo($1, *$3);
if (!setTypeName(*$3, $1) && !$1) {
CHECK_FOR_ERROR
// If this is a named type that is not a redefinition, add it to the slot
// table.
CurModule.Types.push_back(*$3);
}
delete $3;
CHECK_FOR_ERROR
}
| OptLocalAssign TYPE VOID {
ResolveTypeTo($1, $3);
if (!setTypeName($3, $1) && !$1) {
CHECK_FOR_ERROR
// If this is a named type that is not a redefinition, add it to the slot
// table.
CurModule.Types.push_back($3);
}
CHECK_FOR_ERROR
}
| OptGlobalAssign GVVisibilityStyle ThreadLocal GlobalType ConstVal {
/* "Externally Visible" Linkage */
if ($5 == 0)
GEN_ERROR("Global value initializer is not a constant");
CurGV = ParseGlobalVariable($1, GlobalValue::ExternalLinkage,
$2, $4, $5->getType(), $5, $3);
CHECK_FOR_ERROR
} GlobalVarAttributes {
CurGV = 0;
}
| OptGlobalAssign GVInternalLinkage GVVisibilityStyle ThreadLocal GlobalType
ConstVal {
if ($6 == 0)
GEN_ERROR("Global value initializer is not a constant");
CurGV = ParseGlobalVariable($1, $2, $3, $5, $6->getType(), $6, $4);
CHECK_FOR_ERROR
} GlobalVarAttributes {
CurGV = 0;
}
| OptGlobalAssign GVExternalLinkage GVVisibilityStyle ThreadLocal GlobalType
Types {
if (!UpRefs.empty())
GEN_ERROR("Invalid upreference in type: " + (*$6)->getDescription());
CurGV = ParseGlobalVariable($1, $2, $3, $5, *$6, 0, $4);
CHECK_FOR_ERROR
delete $6;
} GlobalVarAttributes {
CurGV = 0;
CHECK_FOR_ERROR
}
| OptGlobalAssign GVVisibilityStyle ALIAS AliasLinkage AliaseeRef {
std::string Name;
if ($1) {
Name = *$1;
delete $1;
}
if (Name.empty())
GEN_ERROR("Alias name cannot be empty");
Constant* Aliasee = $5;
if (Aliasee == 0)
GEN_ERROR(std::string("Invalid aliasee for alias: ") + Name);
GlobalAlias* GA = new GlobalAlias(Aliasee->getType(), $4, Name, Aliasee,
CurModule.CurrentModule);
GA->setVisibility($2);
InsertValue(GA, CurModule.Values);
// If there was a forward reference of this alias, resolve it now.
ValID ID;
if (!Name.empty())
ID = ValID::createGlobalName(Name);
else
ID = ValID::createGlobalID(CurModule.Values.size()-1);
if (GlobalValue *FWGV =
CurModule.GetForwardRefForGlobal(GA->getType(), ID)) {
// Replace uses of the fwdref with the actual alias.
FWGV->replaceAllUsesWith(GA);
if (GlobalVariable *GV = dyn_cast<GlobalVariable>(FWGV))
GV->eraseFromParent();
else
cast<Function>(FWGV)->eraseFromParent();
}
ID.destroy();
CHECK_FOR_ERROR
}
| TARGET TargetDefinition {
CHECK_FOR_ERROR
}
| DEPLIBS '=' LibrariesDefinition {
CHECK_FOR_ERROR
}
;
AsmBlock : STRINGCONSTANT {
const std::string &AsmSoFar = CurModule.CurrentModule->getModuleInlineAsm();
if (AsmSoFar.empty())
CurModule.CurrentModule->setModuleInlineAsm(*$1);
else
CurModule.CurrentModule->setModuleInlineAsm(AsmSoFar+"\n"+*$1);
delete $1;
CHECK_FOR_ERROR
};
TargetDefinition : TRIPLE '=' STRINGCONSTANT {
CurModule.CurrentModule->setTargetTriple(*$3);
delete $3;
}
| DATALAYOUT '=' STRINGCONSTANT {
CurModule.CurrentModule->setDataLayout(*$3);
delete $3;
};
LibrariesDefinition : '[' LibList ']';
LibList : LibList ',' STRINGCONSTANT {
CurModule.CurrentModule->addLibrary(*$3);
delete $3;
CHECK_FOR_ERROR
}
| STRINGCONSTANT {
CurModule.CurrentModule->addLibrary(*$1);
delete $1;
CHECK_FOR_ERROR
}
| /* empty: end of list */ {
CHECK_FOR_ERROR
}
;
//===----------------------------------------------------------------------===//
// Rules to match Function Headers
//===----------------------------------------------------------------------===//
ArgListH : ArgListH ',' Types OptParamAttrs OptLocalName {
if (!UpRefs.empty())
GEN_ERROR("Invalid upreference in type: " + (*$3)->getDescription());
if (*$3 == Type::VoidTy)
GEN_ERROR("void typed arguments are invalid");
ArgListEntry E; E.Attrs = $4; E.Ty = $3; E.Name = $5;
$$ = $1;
$1->push_back(E);
CHECK_FOR_ERROR
}
| Types OptParamAttrs OptLocalName {
if (!UpRefs.empty())
GEN_ERROR("Invalid upreference in type: " + (*$1)->getDescription());
if (*$1 == Type::VoidTy)
GEN_ERROR("void typed arguments are invalid");
ArgListEntry E; E.Attrs = $2; E.Ty = $1; E.Name = $3;
$$ = new ArgListType;
$$->push_back(E);
CHECK_FOR_ERROR
};
ArgList : ArgListH {
$$ = $1;
CHECK_FOR_ERROR
}
| ArgListH ',' DOTDOTDOT {
$$ = $1;
struct ArgListEntry E;
E.Ty = new PATypeHolder(Type::VoidTy);
E.Name = 0;
E.Attrs = ParamAttr::None;
$$->push_back(E);
CHECK_FOR_ERROR
}
| DOTDOTDOT {
$$ = new ArgListType;
struct ArgListEntry E;
E.Ty = new PATypeHolder(Type::VoidTy);
E.Name = 0;
E.Attrs = ParamAttr::None;
$$->push_back(E);
CHECK_FOR_ERROR
}
| /* empty */ {
$$ = 0;
CHECK_FOR_ERROR
};
FunctionHeaderH : OptCallingConv ResultTypes GlobalName '(' ArgList ')'
OptFuncAttrs OptSection OptAlign {
std::string FunctionName(*$3);
delete $3; // Free strdup'd memory!
// Check the function result for abstractness if this is a define. We should
// have no abstract types at this point
if (!CurFun.isDeclare && CurModule.TypeIsUnresolved($2))
GEN_ERROR("Reference to abstract result: "+ $2->get()->getDescription());
std::vector<const Type*> ParamTypeList;
ParamAttrsVector Attrs;
if ($7 != ParamAttr::None) {
ParamAttrsWithIndex PAWI; PAWI.index = 0; PAWI.attrs = $7;
Attrs.push_back(PAWI);
}
if ($5) { // If there are arguments...
unsigned index = 1;
for (ArgListType::iterator I = $5->begin(); I != $5->end(); ++I, ++index) {
const Type* Ty = I->Ty->get();
if (!CurFun.isDeclare && CurModule.TypeIsUnresolved(I->Ty))
GEN_ERROR("Reference to abstract argument: " + Ty->getDescription());
ParamTypeList.push_back(Ty);
if (Ty != Type::VoidTy)
if (I->Attrs != ParamAttr::None) {
ParamAttrsWithIndex PAWI; PAWI.index = index; PAWI.attrs = I->Attrs;
Attrs.push_back(PAWI);
}
}
}
bool isVarArg = ParamTypeList.size() && ParamTypeList.back() == Type::VoidTy;
if (isVarArg) ParamTypeList.pop_back();
ParamAttrsList *PAL = 0;
if (!Attrs.empty())
PAL = ParamAttrsList::get(Attrs);
FunctionType *FT = FunctionType::get(*$2, ParamTypeList, isVarArg, PAL);
const PointerType *PFT = PointerType::get(FT);
delete $2;
ValID ID;
if (!FunctionName.empty()) {
ID = ValID::createGlobalName((char*)FunctionName.c_str());
} else {
ID = ValID::createGlobalID(CurModule.Values.size());
}
Function *Fn = 0;
// See if this function was forward referenced. If so, recycle the object.
if (GlobalValue *FWRef = CurModule.GetForwardRefForGlobal(PFT, ID)) {
// Move the function to the end of the list, from whereever it was
// previously inserted.
Fn = cast<Function>(FWRef);
CurModule.CurrentModule->getFunctionList().remove(Fn);
CurModule.CurrentModule->getFunctionList().push_back(Fn);
} else if (!FunctionName.empty() && // Merge with an earlier prototype?
(Fn = CurModule.CurrentModule->getFunction(FunctionName))) {
if (Fn->getFunctionType() != FT) {
// The existing function doesn't have the same type. This is an overload
// error.
GEN_ERROR("Overload of function '" + FunctionName + "' not permitted.");
} else if (!CurFun.isDeclare && !Fn->isDeclaration()) {
// Neither the existing or the current function is a declaration and they
// have the same name and same type. Clearly this is a redefinition.
GEN_ERROR("Redefinition of function '" + FunctionName + "'");
} if (Fn->isDeclaration()) {
// Make sure to strip off any argument names so we can't get conflicts.
for (Function::arg_iterator AI = Fn->arg_begin(), AE = Fn->arg_end();
AI != AE; ++AI)
AI->setName("");
}
} else { // Not already defined?
Fn = new Function(FT, GlobalValue::ExternalWeakLinkage, FunctionName,
CurModule.CurrentModule);
InsertValue(Fn, CurModule.Values);
}
CurFun.FunctionStart(Fn);
if (CurFun.isDeclare) {
// If we have declaration, always overwrite linkage. This will allow us to
// correctly handle cases, when pointer to function is passed as argument to
// another function.
Fn->setLinkage(CurFun.Linkage);
Fn->setVisibility(CurFun.Visibility);
}
Fn->setCallingConv($1);
Fn->setAlignment($9);
if ($8) {
Fn->setSection(*$8);
delete $8;
}
// Add all of the arguments we parsed to the function...
if ($5) { // Is null if empty...
if (isVarArg) { // Nuke the last entry
assert($5->back().Ty->get() == Type::VoidTy && $5->back().Name == 0 &&
"Not a varargs marker!");
delete $5->back().Ty;
$5->pop_back(); // Delete the last entry
}
Function::arg_iterator ArgIt = Fn->arg_begin();
Function::arg_iterator ArgEnd = Fn->arg_end();
unsigned Idx = 1;
for (ArgListType::iterator I = $5->begin();
I != $5->end() && ArgIt != ArgEnd; ++I, ++ArgIt) {
delete I->Ty; // Delete the typeholder...
setValueName(ArgIt, I->Name); // Insert arg into symtab...
CHECK_FOR_ERROR
InsertValue(ArgIt);
Idx++;
}
delete $5; // We're now done with the argument list
}
CHECK_FOR_ERROR
};
BEGIN : BEGINTOK | '{'; // Allow BEGIN or '{' to start a function
FunctionHeader : FunctionDefineLinkage GVVisibilityStyle FunctionHeaderH BEGIN {
$$ = CurFun.CurrentFunction;
// Make sure that we keep track of the linkage type even if there was a
// previous "declare".
$$->setLinkage($1);
$$->setVisibility($2);
};
END : ENDTOK | '}'; // Allow end of '}' to end a function
Function : BasicBlockList END {
$$ = $1;
CHECK_FOR_ERROR
};
FunctionProto : FunctionDeclareLinkage GVVisibilityStyle FunctionHeaderH {
CurFun.CurrentFunction->setLinkage($1);
CurFun.CurrentFunction->setVisibility($2);
$$ = CurFun.CurrentFunction;
CurFun.FunctionDone();
CHECK_FOR_ERROR
};
//===----------------------------------------------------------------------===//
// Rules to match Basic Blocks
//===----------------------------------------------------------------------===//
OptSideEffect : /* empty */ {
$$ = false;
CHECK_FOR_ERROR
}
| SIDEEFFECT {
$$ = true;
CHECK_FOR_ERROR
};
ConstValueRef : ESINT64VAL { // A reference to a direct constant
$$ = ValID::create($1);
CHECK_FOR_ERROR
}
| EUINT64VAL {
$$ = ValID::create($1);
CHECK_FOR_ERROR
}
| FPVAL { // Perhaps it's an FP constant?
$$ = ValID::create($1);
CHECK_FOR_ERROR
}
| TRUETOK {
$$ = ValID::create(ConstantInt::getTrue());
CHECK_FOR_ERROR
}
| FALSETOK {
$$ = ValID::create(ConstantInt::getFalse());
CHECK_FOR_ERROR
}
| NULL_TOK {
$$ = ValID::createNull();
CHECK_FOR_ERROR
}
| UNDEF {
$$ = ValID::createUndef();
CHECK_FOR_ERROR
}
| ZEROINITIALIZER { // A vector zero constant.
$$ = ValID::createZeroInit();
CHECK_FOR_ERROR
}
| '<' ConstVector '>' { // Nonempty unsized packed vector
const Type *ETy = (*$2)[0]->getType();
int NumElements = $2->size();
VectorType* pt = VectorType::get(ETy, NumElements);
PATypeHolder* PTy = new PATypeHolder(
HandleUpRefs(
VectorType::get(
ETy,
NumElements)
)
);
// Verify all elements are correct type!
for (unsigned i = 0; i < $2->size(); i++) {
if (ETy != (*$2)[i]->getType())
GEN_ERROR("Element #" + utostr(i) + " is not of type '" +
ETy->getDescription() +"' as required!\nIt is of type '" +
(*$2)[i]->getType()->getDescription() + "'.");
}
$$ = ValID::create(ConstantVector::get(pt, *$2));
delete PTy; delete $2;
CHECK_FOR_ERROR
}
| ConstExpr {
$$ = ValID::create($1);
CHECK_FOR_ERROR
}
| ASM_TOK OptSideEffect STRINGCONSTANT ',' STRINGCONSTANT {
$$ = ValID::createInlineAsm(*$3, *$5, $2);
delete $3;
delete $5;
CHECK_FOR_ERROR
};
// SymbolicValueRef - Reference to one of two ways of symbolically refering to
// another value.
//
SymbolicValueRef : LOCALVAL_ID { // Is it an integer reference...?
$$ = ValID::createLocalID($1);
CHECK_FOR_ERROR
}
| GLOBALVAL_ID {
$$ = ValID::createGlobalID($1);
CHECK_FOR_ERROR
}
| LocalName { // Is it a named reference...?
$$ = ValID::createLocalName(*$1);
delete $1;
CHECK_FOR_ERROR
}
| GlobalName { // Is it a named reference...?
$$ = ValID::createGlobalName(*$1);
delete $1;
CHECK_FOR_ERROR
};
// ValueRef - A reference to a definition... either constant or symbolic
ValueRef : SymbolicValueRef | ConstValueRef;
// ResolvedVal - a <type> <value> pair. This is used only in cases where the
// type immediately preceeds the value reference, and allows complex constant
// pool references (for things like: 'ret [2 x int] [ int 12, int 42]')
ResolvedVal : Types ValueRef {
if (!UpRefs.empty())
GEN_ERROR("Invalid upreference in type: " + (*$1)->getDescription());
$$ = getVal(*$1, $2);
delete $1;
CHECK_FOR_ERROR
}
;
BasicBlockList : BasicBlockList BasicBlock {
$$ = $1;
CHECK_FOR_ERROR
}
| FunctionHeader BasicBlock { // Do not allow functions with 0 basic blocks
$$ = $1;
CHECK_FOR_ERROR
};
// Basic blocks are terminated by branching instructions:
// br, br/cc, switch, ret
//
BasicBlock : InstructionList OptLocalAssign BBTerminatorInst {
setValueName($3, $2);
CHECK_FOR_ERROR
InsertValue($3);
$1->getInstList().push_back($3);
$$ = $1;
CHECK_FOR_ERROR
};
InstructionList : InstructionList Inst {
if (CastInst *CI1 = dyn_cast<CastInst>($2))
if (CastInst *CI2 = dyn_cast<CastInst>(CI1->getOperand(0)))
if (CI2->getParent() == 0)
$1->getInstList().push_back(CI2);
$1->getInstList().push_back($2);
$$ = $1;
CHECK_FOR_ERROR
}
| /* empty */ { // Empty space between instruction lists
$$ = defineBBVal(ValID::createLocalID(CurFun.NextValNum));
CHECK_FOR_ERROR
}
| LABELSTR { // Labelled (named) basic block
$$ = defineBBVal(ValID::createLocalName(*$1));
delete $1;
CHECK_FOR_ERROR
};
BBTerminatorInst : RET ResolvedVal { // Return with a result...
$$ = new ReturnInst($2);
CHECK_FOR_ERROR
}
| RET VOID { // Return with no result...
$$ = new ReturnInst();
CHECK_FOR_ERROR
}
| BR LABEL ValueRef { // Unconditional Branch...
BasicBlock* tmpBB = getBBVal($3);
CHECK_FOR_ERROR
$$ = new BranchInst(tmpBB);
} // Conditional Branch...
| BR INTTYPE ValueRef ',' LABEL ValueRef ',' LABEL ValueRef {
assert(cast<IntegerType>($2)->getBitWidth() == 1 && "Not Bool?");
BasicBlock* tmpBBA = getBBVal($6);
CHECK_FOR_ERROR
BasicBlock* tmpBBB = getBBVal($9);
CHECK_FOR_ERROR
Value* tmpVal = getVal(Type::Int1Ty, $3);
CHECK_FOR_ERROR
$$ = new BranchInst(tmpBBA, tmpBBB, tmpVal);
}
| SWITCH IntType ValueRef ',' LABEL ValueRef '[' JumpTable ']' {
Value* tmpVal = getVal($2, $3);
CHECK_FOR_ERROR
BasicBlock* tmpBB = getBBVal($6);
CHECK_FOR_ERROR
SwitchInst *S = new SwitchInst(tmpVal, tmpBB, $8->size());
$$ = S;
std::vector<std::pair<Constant*,BasicBlock*> >::iterator I = $8->begin(),
E = $8->end();
for (; I != E; ++I) {
if (ConstantInt *CI = dyn_cast<ConstantInt>(I->first))
S->addCase(CI, I->second);
else
GEN_ERROR("Switch case is constant, but not a simple integer");
}
delete $8;
CHECK_FOR_ERROR
}
| SWITCH IntType ValueRef ',' LABEL ValueRef '[' ']' {
Value* tmpVal = getVal($2, $3);
CHECK_FOR_ERROR
BasicBlock* tmpBB = getBBVal($6);
CHECK_FOR_ERROR
SwitchInst *S = new SwitchInst(tmpVal, tmpBB, 0);
$$ = S;
CHECK_FOR_ERROR
}
| INVOKE OptCallingConv ResultTypes ValueRef '(' ValueRefList ')' OptFuncAttrs
TO LABEL ValueRef UNWIND LABEL ValueRef {
// Handle the short syntax
const PointerType *PFTy = 0;
const FunctionType *Ty = 0;
if (!(PFTy = dyn_cast<PointerType>($3->get())) ||
!(Ty = dyn_cast<FunctionType>(PFTy->getElementType()))) {
// Pull out the types of all of the arguments...
std::vector<const Type*> ParamTypes;
ParamAttrsVector Attrs;
if ($8 != ParamAttr::None) {
ParamAttrsWithIndex PAWI; PAWI.index = 0; PAWI.attrs = $8;
Attrs.push_back(PAWI);
}
ValueRefList::iterator I = $6->begin(), E = $6->end();
unsigned index = 1;
for (; I != E; ++I, ++index) {
const Type *Ty = I->Val->getType();
if (Ty == Type::VoidTy)
GEN_ERROR("Short call syntax cannot be used with varargs");
ParamTypes.push_back(Ty);
if (I->Attrs != ParamAttr::None) {
ParamAttrsWithIndex PAWI; PAWI.index = index; PAWI.attrs = I->Attrs;
Attrs.push_back(PAWI);
}
}
ParamAttrsList *PAL = 0;
if (!Attrs.empty())
PAL = ParamAttrsList::get(Attrs);
Ty = FunctionType::get($3->get(), ParamTypes, false, PAL);
PFTy = PointerType::get(Ty);
}
delete $3;
Value *V = getVal(PFTy, $4); // Get the function we're calling...
CHECK_FOR_ERROR
BasicBlock *Normal = getBBVal($11);
CHECK_FOR_ERROR
BasicBlock *Except = getBBVal($14);
CHECK_FOR_ERROR
// Check the arguments
ValueList Args;
if ($6->empty()) { // Has no arguments?
// Make sure no arguments is a good thing!
if (Ty->getNumParams() != 0)
GEN_ERROR("No arguments passed to a function that "
"expects arguments");
} else { // Has arguments?
// Loop through FunctionType's arguments and ensure they are specified
// correctly!
FunctionType::param_iterator I = Ty->param_begin();
FunctionType::param_iterator E = Ty->param_end();
ValueRefList::iterator ArgI = $6->begin(), ArgE = $6->end();
for (; ArgI != ArgE && I != E; ++ArgI, ++I) {
if (ArgI->Val->getType() != *I)
GEN_ERROR("Parameter " + ArgI->Val->getName()+ " is not of type '" +
(*I)->getDescription() + "'");
Args.push_back(ArgI->Val);
}
if (Ty->isVarArg()) {
if (I == E)
for (; ArgI != ArgE; ++ArgI)
Args.push_back(ArgI->Val); // push the remaining varargs
} else if (I != E || ArgI != ArgE)
GEN_ERROR("Invalid number of parameters detected");
}
// Create the InvokeInst
InvokeInst *II = new InvokeInst(V, Normal, Except, Args.begin(), Args.end());
II->setCallingConv($2);
$$ = II;
delete $6;
CHECK_FOR_ERROR
}
| UNWIND {
$$ = new UnwindInst();
CHECK_FOR_ERROR
}
| UNREACHABLE {
$$ = new UnreachableInst();
CHECK_FOR_ERROR
};
JumpTable : JumpTable