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8ab406d5bd
llvm-6502/lib/AsmParser/llvmAsmParser.y
Chris Lattner 8ab406d5bd A couple of substantial cleanup fixes: 
1. Split setValueName into two separate functions, one that is only used
     at function scope and doesn't have to deal with duplicates, and one
     that can be used either at global or function scope but that does deal
     with conflicts.  Conflicts were only in there because of the crappy old
     CFE and probably should be entirely eliminated.
  2. Insert BasicBlock's into the parent functions when they are created
     instead of when they are complete.  This effects name lookup (for the
     better), which will be exploited in the next patch.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14787 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-13 07:59:27 +00:00

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//===-- 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/SymbolTable.h"
#include "llvm/Module.h"
#include "llvm/iTerminators.h"
#include "llvm/iMemory.h"
#include "llvm/iOperators.h"
#include "llvm/iPHINode.h"
#include "llvm/Support/GetElementPtrTypeIterator.h"
#include "Support/STLExtras.h"
#include <algorithm>
#include <iostream>
#include <list>
#include <utility>
int yyerror(const char *ErrorMsg); // Forward declarations to prevent "implicit
int yylex(); // declaration" of xxx warnings.
int yyparse();
namespace llvm {
static Module *ParserResult;
std::string CurFilename;
// 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) std::cerr << X
#else
#define UR_OUT(X)
#endif
#define YYERROR_VERBOSE 1
// HACK ALERT: This variable is used to implement the automatic conversion of
// variable argument instructions from their old to new forms. When this
// compatiblity "Feature" is removed, this should be too.
//
static BasicBlock *CurBB;
static bool ObsoleteVarArgs;
// 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(std::map<const Type *,ValueList> &LateResolvers,
std::map<const Type *,ValueList> *FutureLateResolvers = 0);
static struct PerModuleInfo {
Module *CurrentModule;
std::map<const Type *, ValueList> Values; // Module level numbered definitions
std::map<const Type *,ValueList> LateResolveValues;
std::vector<PATypeHolder> Types;
std::map<ValID, PATypeHolder> LateResolveTypes;
// 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 ConstantPointerRefs.
//
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);
// 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";
}
ThrowException(UndefinedReferences);
}
Values.clear(); // Clear out function local definitions
Types.clear();
CurrentModule = 0;
}
// DeclareNewGlobalValue - Called every time a new GV has been defined. This
// is used to remove things from the forward declaration map, resolving them
// to the correct thing as needed.
//
void DeclareNewGlobalValue(GlobalValue *GV, ValID D) {
// 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(GV->getType(), D));
if (I != GlobalRefs.end()) {
GlobalValue *OldGV = I->second; // Get the placeholder...
I->first.second.destroy(); // Free string memory if necessary
// Replace all uses of the placeholder with the new GV
OldGV->replaceAllUsesWith(GV);
// Remove OldGV from the module...
if (GlobalVariable *GVar = dyn_cast<GlobalVariable>(OldGV))
CurrentModule->getGlobalList().erase(GVar);
else
CurrentModule->getFunctionList().erase(cast<Function>(OldGV));
// Remove the map entry for the global now that it has been created...
GlobalRefs.erase(I);
}
}
} CurModule;
static struct PerFunctionInfo {
Function *CurrentFunction; // Pointer to current function being created
std::map<const Type*, ValueList> Values; // Keep track of #'d definitions
std::map<const Type*, ValueList> LateResolveValues;
std::vector<PATypeHolder> Types;
std::map<ValID, PATypeHolder> LateResolveTypes;
SymbolTable LocalSymtab;
bool isDeclare; // Is this function a forward declararation?
inline PerFunctionInfo() {
CurrentFunction = 0;
isDeclare = false;
}
inline void FunctionStart(Function *M) {
CurrentFunction = M;
}
void FunctionDone() {
// If we could not resolve some blocks at parsing time (forward branches)
// resolve the branches now...
ResolveDefinitions(LateResolveValues, &CurModule.LateResolveValues);
// Make sure to resolve any constant expr references that might exist within
// the function we just declared itself.
ValID FID;
if (CurrentFunction->hasName()) {
FID = ValID::create((char*)CurrentFunction->getName().c_str());
} else {
// Figure out which slot number if is...
ValueList &List = CurModule.Values[CurrentFunction->getType()];
for (unsigned i = 0; ; ++i) {
assert(i < List.size() && "Function not found!");
if (List[i] == CurrentFunction) {
FID = ValID::create((int)i);
break;
}
}
}
CurModule.DeclareNewGlobalValue(CurrentFunction, FID);
Values.clear(); // Clear out function local definitions
Types.clear(); // Clear out function local types
LocalSymtab.clear(); // Clear out function local symbol table
CurrentFunction = 0;
isDeclare = false;
}
} CurFun; // Info for the current function...
static bool inFunctionScope() { return CurFun.CurrentFunction != 0; }
//===----------------------------------------------------------------------===//
// Code to handle definitions of all the types
//===----------------------------------------------------------------------===//
static int InsertValue(Value *V,
std::map<const Type*,ValueList> &ValueTab = CurFun.Values) {
if (V->hasName()) return -1; // Is this a numbered definition?
// Yes, insert the value into the value table...
ValueList &List = ValueTab[V->getType()];
List.push_back(V);
return List.size()-1;
}
// TODO: FIXME when Type are not const
static void InsertType(const Type *Ty, std::vector<PATypeHolder> &Types) {
Types.push_back(Ty);
}
static const Type *getTypeVal(const ValID &D, bool DoNotImprovise = false) {
switch (D.Type) {
case ValID::NumberVal: { // Is it a numbered definition?
unsigned Num = (unsigned)D.Num;
// Module constants occupy the lowest numbered slots...
if (Num < CurModule.Types.size())
return CurModule.Types[Num];
Num -= CurModule.Types.size();
// Check that the number is within bounds...
if (Num <= CurFun.Types.size())
return CurFun.Types[Num];
break;
}
case ValID::NameVal: { // Is it a named definition?
std::string Name(D.Name);
SymbolTable *SymTab = 0;
Type *N = 0;
if (inFunctionScope()) {
SymTab = &CurFun.CurrentFunction->getSymbolTable();
N = SymTab->lookupType(Name);
}
if (N == 0) {
// Symbol table doesn't automatically chain yet... because the function
// hasn't been added to the module...
//
SymTab = &CurModule.CurrentModule->getSymbolTable();
N = SymTab->lookupType(Name);
if (N == 0) break;
}
D.destroy(); // Free old strdup'd memory...
return cast<Type>(N);
}
default:
ThrowException("Internal parser error: Invalid symbol type reference!");
}
// 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?
std::map<ValID, PATypeHolder> &LateResolver = inFunctionScope() ?
CurFun.LateResolveTypes : CurModule.LateResolveTypes;
std::map<ValID, PATypeHolder>::iterator I = LateResolver.find(D);
if (I != LateResolver.end()) {
return I->second;
}
Type *Typ = OpaqueType::get();
LateResolver.insert(std::make_pair(D, Typ));
return Typ;
}
static Value *lookupInSymbolTable(const Type *Ty, const std::string &Name) {
SymbolTable &SymTab =
inFunctionScope() ? CurFun.CurrentFunction->getSymbolTable() :
CurModule.CurrentModule->getSymbolTable();
return SymTab.lookup(Ty, Name);
}
// getValNonImprovising - 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 *getValNonImprovising(const Type *Ty, const ValID &D) {
if (isa<FunctionType>(Ty))
ThrowException("Functions are not values and "
"must be referenced as pointers");
switch (D.Type) {
case ValID::NumberVal: { // Is it a numbered definition?
unsigned Num = (unsigned)D.Num;
// Module constants occupy the lowest numbered slots...
std::map<const Type*,ValueList>::iterator VI = CurModule.Values.find(Ty);
if (VI != CurModule.Values.end()) {
if (Num < VI->second.size())
return VI->second[Num];
Num -= VI->second.size();
}
// Make sure that our type is within bounds
VI = CurFun.Values.find(Ty);
if (VI == CurFun.Values.end()) return 0;
// Check that the number is within bounds...
if (VI->second.size() <= Num) return 0;
return VI->second[Num];
}
case ValID::NameVal: { // Is it a named definition?
Value *N = lookupInSymbolTable(Ty, std::string(D.Name));
if (N == 0) 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 (!ConstantSInt::isValueValidForType(Ty, D.ConstPool64))
ThrowException("Signed integral constant '" +
itostr(D.ConstPool64) + "' is invalid for type '" +
Ty->getDescription() + "'!");
return ConstantSInt::get(Ty, D.ConstPool64);
case ValID::ConstUIntVal: // Is it an unsigned const pool reference?
if (!ConstantUInt::isValueValidForType(Ty, D.UConstPool64)) {
if (!ConstantSInt::isValueValidForType(Ty, D.ConstPool64)) {
ThrowException("Integral constant '" + utostr(D.UConstPool64) +
"' is invalid or out of range!");
} else { // This is really a signed reference. Transmogrify.
return ConstantSInt::get(Ty, D.ConstPool64);
}
} else {
return ConstantUInt::get(Ty, D.UConstPool64);
}
case ValID::ConstFPVal: // Is it a floating point const pool reference?
if (!ConstantFP::isValueValidForType(Ty, D.ConstPoolFP))
ThrowException("FP constant invalid for type!!");
return ConstantFP::get(Ty, D.ConstPoolFP);
case ValID::ConstNullVal: // Is it a null value?
if (!isa<PointerType>(Ty))
ThrowException("Cannot create a a non pointer null!");
return ConstantPointerNull::get(cast<PointerType>(Ty));
case ValID::ConstantVal: // Fully resolved constant?
if (D.ConstantValue->getType() != Ty)
ThrowException("Constant expression type different from required type!");
return D.ConstantValue;
default:
assert(0 && "Unhandled case!");
return 0;
} // End of switch
assert(0 && "Unhandled case!");
return 0;
}
// getVal - This function is identical to getValNonImprovising, 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 &D) {
// See if the value has already been defined...
Value *V = getValNonImprovising(Ty, D);
if (V) return V;
// 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...
//
Value *d = 0;
switch (Ty->getTypeID()) {
case Type::LabelTyID: d = new BBPlaceHolder(Ty, D); break;
default: d = new ValuePlaceHolder(Ty, D); break;
}
assert(d != 0 && "How did we not make something?");
if (inFunctionScope())
InsertValue(d, CurFun.LateResolveValues);
else
InsertValue(d, CurModule.LateResolveValues);
return d;
}
//===----------------------------------------------------------------------===//
// 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(std::map<const Type*,ValueList> &LateResolvers,
std::map<const Type*,ValueList> *FutureLateResolvers) {
// Loop over LateResolveDefs fixing up stuff that couldn't be resolved
for (std::map<const Type*,ValueList>::iterator LRI = LateResolvers.begin(),
E = LateResolvers.end(); LRI != E; ++LRI) {
ValueList &List = LRI->second;
while (!List.empty()) {
Value *V = List.back();
List.pop_back();
ValID &DID = getValIDFromPlaceHolder(V);
Value *TheRealValue = getValNonImprovising(LRI->first, DID);
if (TheRealValue) {
V->replaceAllUsesWith(TheRealValue);
delete V;
} else if (FutureLateResolvers) {
// Functions have their unresolved items forwarded to the module late
// resolver table
InsertValue(V, *FutureLateResolvers);
} else {
if (DID.Type == ValID::NameVal)
ThrowException("Reference to an invalid definition: '" +DID.getName()+
"' of type '" + V->getType()->getDescription() + "'",
getLineNumFromPlaceHolder(V));
else
ThrowException("Reference to an invalid definition: #" +
itostr(DID.Num) + " of type '" +
V->getType()->getDescription() + "'",
getLineNumFromPlaceHolder(V));
}
}
}
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(char *Name, const Type *ToTy) {
std::vector<PATypeHolder> &Types = inFunctionScope() ?
CurFun.Types : CurModule.Types;
ValID D;
if (Name) D = ValID::create(Name);
else D = ValID::create((int)Types.size());
std::map<ValID, PATypeHolder> &LateResolver = inFunctionScope() ?
CurFun.LateResolveTypes : CurModule.LateResolveTypes;
std::map<ValID, PATypeHolder>::iterator I = LateResolver.find(D);
if (I != LateResolver.end()) {
((DerivedType*)I->second.get())->refineAbstractTypeTo(ToTy);
LateResolver.erase(I);
}
}
// ResolveTypes - At this point, all types should be resolved. Any that aren't
// are errors.
//
static void ResolveTypes(std::map<ValID, PATypeHolder> &LateResolveTypes) {
if (!LateResolveTypes.empty()) {
const ValID &DID = LateResolveTypes.begin()->first;
if (DID.Type == ValID::NameVal)
ThrowException("Reference to an invalid type: '" +DID.getName() + "'");
else
ThrowException("Reference to an invalid type: #" + itostr(DID.Num));
}
}
static void setValueNameInternal(Value *V, const std::string &Name,
SymbolTable &ST) {
if (V->getType() == Type::VoidTy)
ThrowException("Can't assign name '" + Name + "' to value with void type!");
// Set the name
V->setName(Name, &ST);
// If we're in function scope
if (inFunctionScope()) {
// Look up the symbol in the Function's local symboltable
Value *Existing = CurFun.LocalSymtab.lookup(V->getType(),Name);
// If it already exists, bail out. We have to recheck this, because there
// may be entries inserted into the current basic block (which has not yet
// been inserted into the function) which collide.
if (Existing) {
ThrowException("Redefinition of value named '" + Name + "' in the '" +
V->getType()->getDescription() + "' type plane!");
} else {
// otherwise, since it doesn't exist, insert it.
CurFun.LocalSymtab.insert(V);
}
}
}
// 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, char *NameStr) {
if (NameStr) {
std::string Name(NameStr); // Copy string
free(NameStr); // Free old string
assert(inFunctionScope() && "Must be in function scope!");
SymbolTable &ST = CurFun.CurrentFunction->getSymbolTable();
if (ST.lookup(V->getType(), Name))
ThrowException("Redefinition of value named '" + Name + "' in the '" +
V->getType()->getDescription() + "' type plane!");
setValueNameInternal(V, Name, ST);
}
}
// setValueNameMergingDuplicates - 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.
//
// This function returns true if the value has already been defined, but is
// allowed to be redefined in the specified context. If the name is a new name
// for the typeplane, false is returned.
//
static bool setValueNameMergingDuplicates(Value *V, char *NameStr) {
if (NameStr == 0) return false;
std::string Name(NameStr); // Copy string
free(NameStr); // Free old string
// FIXME: If we eliminated the function constant pool (which we should), this
// would just unconditionally look at the module symtab.
SymbolTable &ST = inFunctionScope() ?
CurFun.CurrentFunction->getSymbolTable() :
CurModule.CurrentModule->getSymbolTable();
Value *Existing = ST.lookup(V->getType(), Name);
if (Existing) { // Inserting a name that is already defined???
// We are a simple redefinition of a value, check to see if it is defined
// the same as the old one...
if (GlobalVariable *EGV = dyn_cast<GlobalVariable>(Existing)) {
// We are allowed to redefine a global variable in two circumstances:
// 1. If at least one of the globals is uninitialized or
// 2. If both initializers have the same value.
//
if (GlobalVariable *GV = dyn_cast<GlobalVariable>(V)) {
if (!EGV->hasInitializer() || !GV->hasInitializer() ||
EGV->getInitializer() == GV->getInitializer()) {
// Make sure the existing global version gets the initializer! Make
// sure that it also gets marked const if the new version is.
if (GV->hasInitializer() && !EGV->hasInitializer())
EGV->setInitializer(GV->getInitializer());
if (GV->isConstant())
EGV->setConstant(true);
EGV->setLinkage(GV->getLinkage());
delete GV; // Destroy the duplicate!
return true; // They are equivalent!
}
}
} else if (const Constant *C = dyn_cast<Constant>(Existing)) {
if (C == V) return true; // Constants are equal to themselves
}
ThrowException("Redefinition of value named '" + Name + "' in the '" +
V->getType()->getDescription() + "' type plane!");
}
setValueNameInternal(V, Name, ST);
return false;
}
// 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(Type *T, char *NameStr) {
if (NameStr == 0) return false;
std::string Name(NameStr); // Copy string
free(NameStr); // Free old string
// We don't allow assigning names to void type
if (T == Type::VoidTy)
ThrowException("Can't assign name '" + Name + "' to the null type!");
SymbolTable &ST = inFunctionScope() ?
CurFun.CurrentFunction->getSymbolTable() :
CurModule.CurrentModule->getSymbolTable();
Type *Existing = ST.lookupType(Name);
if (Existing) { // Inserting a name that is already defined???
// 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!
((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.
ThrowException("Redefinition of type named '" + Name + "' in the '" +
T->getDescription() + "' type plane!");
}
// Okay, its a newly named type. Set its name.
if (!Name.empty()) ST.insert(Name, T);
// If we're in function scope
if (inFunctionScope()) {
// Look up the symbol in the function's local symboltable
Existing = CurFun.LocalSymtab.lookupType(Name);
// If it already exists
if (Existing) {
// Bail
ThrowException("Redefinition of type named '" + Name + "' in the '" +
T->getDescription() + "' type plane in function scope!");
// otherwise, since it doesn't exist
} else {
// Insert it.
CurFun.LocalSymtab.insert(Name,T);
}
}
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 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->isAbstract()) 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
//===----------------------------------------------------------------------===//
//
Module *RunVMAsmParser(const std::string &Filename, FILE *F) {
llvmAsmin = F;
CurFilename = Filename;
llvmAsmlineno = 1; // Reset the current line number...
ObsoleteVarArgs = false;
// Allocate a new module to read
CurModule.CurrentModule = new Module(Filename);
try {
yyparse(); // Parse the file.
} catch (...) {
// Clear the symbol table so it doesn't complain when it
// gets destructed
CurFun.LocalSymtab.clear();
throw;
}
Module *Result = ParserResult;
// Check to see if they called va_start but not va_arg..
if (!ObsoleteVarArgs)
if (Function *F = Result->getNamedFunction("llvm.va_start"))
if (F->asize() == 1) {
std::cerr << "WARNING: this file uses obsolete features. "
<< "Assemble and disassemble to update it.\n";
ObsoleteVarArgs = true;
}
if (ObsoleteVarArgs) {
// If the user is making use of obsolete varargs intrinsics, adjust them for
// the user.
if (Function *F = Result->getNamedFunction("llvm.va_start")) {
assert(F->asize() == 1 && "Obsolete va_start takes 1 argument!");
const Type *RetTy = F->getFunctionType()->getParamType(0);
RetTy = cast<PointerType>(RetTy)->getElementType();
Function *NF = Result->getOrInsertFunction("llvm.va_start", RetTy, 0);
while (!F->use_empty()) {
CallInst *CI = cast<CallInst>(F->use_back());
Value *V = new CallInst(NF, "", CI);
new StoreInst(V, CI->getOperand(1), CI);
CI->getParent()->getInstList().erase(CI);
}
Result->getFunctionList().erase(F);
}
if (Function *F = Result->getNamedFunction("llvm.va_end")) {
assert(F->asize() == 1 && "Obsolete va_end takes 1 argument!");
const Type *ArgTy = F->getFunctionType()->getParamType(0);
ArgTy = cast<PointerType>(ArgTy)->getElementType();
Function *NF = Result->getOrInsertFunction("llvm.va_end", Type::VoidTy,
ArgTy, 0);
while (!F->use_empty()) {
CallInst *CI = cast<CallInst>(F->use_back());
Value *V = new LoadInst(CI->getOperand(1), "", CI);
new CallInst(NF, V, "", CI);
CI->getParent()->getInstList().erase(CI);
}
Result->getFunctionList().erase(F);
}
if (Function *F = Result->getNamedFunction("llvm.va_copy")) {
assert(F->asize() == 2 && "Obsolete va_copy takes 2 argument!");
const Type *ArgTy = F->getFunctionType()->getParamType(0);
ArgTy = cast<PointerType>(ArgTy)->getElementType();
Function *NF = Result->getOrInsertFunction("llvm.va_copy", ArgTy,
ArgTy, 0);
while (!F->use_empty()) {
CallInst *CI = cast<CallInst>(F->use_back());
Value *V = new CallInst(NF, CI->getOperand(2), "", CI);
new StoreInst(V, CI->getOperand(1), CI);
CI->getParent()->getInstList().erase(CI);
}
Result->getFunctionList().erase(F);
}
}
llvmAsmin = stdin; // F is about to go away, don't use it anymore...
ParserResult = 0;
return Result;
}
} // End llvm namespace
using namespace llvm;
%}
%union {
llvm::Module *ModuleVal;
llvm::Function *FunctionVal;
std::pair<llvm::PATypeHolder*, char*> *ArgVal;
llvm::BasicBlock *BasicBlockVal;
llvm::TerminatorInst *TermInstVal;
llvm::Instruction *InstVal;
llvm::Constant *ConstVal;
const llvm::Type *PrimType;
llvm::PATypeHolder *TypeVal;
llvm::Value *ValueVal;
std::vector<std::pair<llvm::PATypeHolder*,char*> > *ArgList;
std::vector<llvm::Value*> *ValueList;
std::list<llvm::PATypeHolder> *TypeList;
std::list<std::pair<llvm::Value*,
llvm::BasicBlock*> > *PHIList; // Represent the RHS of PHI node
std::vector<std::pair<llvm::Constant*, llvm::BasicBlock*> > *JumpTable;
std::vector<llvm::Constant*> *ConstVector;
llvm::GlobalValue::LinkageTypes Linkage;
int64_t SInt64Val;
uint64_t UInt64Val;
int SIntVal;
unsigned UIntVal;
double FPVal;
bool BoolVal;
char *StrVal; // This memory is strdup'd!
llvm::ValID ValIDVal; // strdup'd memory maybe!
llvm::Instruction::BinaryOps BinaryOpVal;
llvm::Instruction::TermOps TermOpVal;
llvm::Instruction::MemoryOps MemOpVal;
llvm::Instruction::OtherOps OtherOpVal;
llvm::Module::Endianness Endianness;
}
%type <ModuleVal> Module FunctionList
%type <FunctionVal> Function FunctionProto FunctionHeader BasicBlockList
%type <BasicBlockVal> BasicBlock InstructionList
%type <TermInstVal> BBTerminatorInst
%type <InstVal> Inst InstVal MemoryInst
%type <ConstVal> ConstVal ConstExpr
%type <ConstVector> ConstVector
%type <ArgList> ArgList ArgListH
%type <ArgVal> ArgVal
%type <PHIList> PHIList
%type <ValueList> ValueRefList ValueRefListE // For call param lists
%type <ValueList> IndexList // For GEP derived indices
%type <TypeList> TypeListI ArgTypeListI
%type <JumpTable> JumpTable
%type <BoolVal> GlobalType // GLOBAL or CONSTANT?
%type <BoolVal> OptVolatile // 'volatile' or not
%type <Linkage> OptLinkage
%type <Endianness> BigOrLittle
// 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
%type <SInt64Val> EINT64VAL
%token <SIntVal> SINTVAL // Signed 32 bit ints...
%token <UIntVal> UINTVAL // Unsigned 32 bit ints...
%type <SIntVal> INTVAL
%token <FPVal> FPVAL // Float or Double constant
// Built in types...
%type <TypeVal> Types TypesV UpRTypes UpRTypesV
%type <PrimType> SIntType UIntType IntType FPType PrimType // Classifications
%token <PrimType> VOID BOOL SBYTE UBYTE SHORT USHORT INT UINT LONG ULONG
%token <PrimType> FLOAT DOUBLE TYPE LABEL
%token <StrVal> VAR_ID LABELSTR STRINGCONSTANT
%type <StrVal> Name OptName OptAssign
%token IMPLEMENTATION ZEROINITIALIZER TRUETOK FALSETOK BEGINTOK ENDTOK
%token DECLARE GLOBAL CONSTANT VOLATILE
%token TO DOTDOTDOT NULL_TOK CONST INTERNAL LINKONCE WEAK APPENDING
%token OPAQUE NOT EXTERNAL TARGET ENDIAN POINTERSIZE LITTLE BIG
// Basic Block Terminating Operators
%token <TermOpVal> RET BR SWITCH INVOKE UNWIND
// Binary Operators
%type <BinaryOpVal> BinaryOps // all the binary operators
%type <BinaryOpVal> ArithmeticOps LogicalOps SetCondOps // Binops Subcatagories
%token <BinaryOpVal> ADD SUB MUL DIV REM AND OR XOR
%token <BinaryOpVal> SETLE SETGE SETLT SETGT SETEQ SETNE // Binary Comarators
// Memory Instructions
%token <MemOpVal> MALLOC ALLOCA FREE LOAD STORE GETELEMENTPTR
// Other Operators
%type <OtherOpVal> ShiftOps
%token <OtherOpVal> PHI_TOK CALL CAST SELECT SHL SHR VAARG VANEXT
%token VA_ARG // FIXME: OBSOLETE
%start Module
%%
// Handle constant integer size restriction and conversion...
//
INTVAL : SINTVAL;
INTVAL : UINTVAL {
if ($1 > (uint32_t)INT32_MAX) // Outside of my range!
ThrowException("Value too large for type!");
$$ = (int32_t)$1;
};
EINT64VAL : ESINT64VAL; // These have same type and can't cause problems...
EINT64VAL : EUINT64VAL {
if ($1 > (uint64_t)INT64_MAX) // Outside of my range!
ThrowException("Value too large for type!");
$$ = (int64_t)$1;
};
// 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 | DIV | REM;
LogicalOps : AND | OR | XOR;
SetCondOps : SETLE | SETGE | SETLT | SETGT | SETEQ | SETNE;
BinaryOps : ArithmeticOps | LogicalOps | SetCondOps;
ShiftOps : SHL | SHR;
// These are some types that allow classification if we only want a particular
// thing... for example, only a signed, unsigned, or integral type.
SIntType : LONG | INT | SHORT | SBYTE;
UIntType : ULONG | UINT | USHORT | UBYTE;
IntType : SIntType | UIntType;
FPType : FLOAT | DOUBLE;
// OptAssign - Value producing statements have an optional assignment component
OptAssign : Name '=' {
$$ = $1;
}
| /*empty*/ {
$$ = 0;
};
OptLinkage : INTERNAL { $$ = GlobalValue::InternalLinkage; } |
LINKONCE { $$ = GlobalValue::LinkOnceLinkage; } |
WEAK { $$ = GlobalValue::WeakLinkage; } |
APPENDING { $$ = GlobalValue::AppendingLinkage; } |
/*empty*/ { $$ = GlobalValue::ExternalLinkage; };
//===----------------------------------------------------------------------===//
// Types includes all predefined types... except void, because it can only be
// used in specific contexts (function returning void for example). To have
// access to it, a user must explicitly use TypesV.
//
// TypesV includes all of 'Types', but it also includes the void type.
TypesV : Types | VOID { $$ = new PATypeHolder($1); };
UpRTypesV : UpRTypes | VOID { $$ = new PATypeHolder($1); };
Types : UpRTypes {
if (!UpRefs.empty())
ThrowException("Invalid upreference in type: " + (*$1)->getDescription());
$$ = $1;
};
// Derived types are added later...
//
PrimType : BOOL | SBYTE | UBYTE | SHORT | USHORT | INT | UINT ;
PrimType : LONG | ULONG | FLOAT | DOUBLE | TYPE | LABEL;
UpRTypes : OPAQUE {
$$ = new PATypeHolder(OpaqueType::get());
}
| PrimType {
$$ = new PATypeHolder($1);
};
UpRTypes : SymbolicValueRef { // Named types are also simple types...
$$ = new PATypeHolder(getTypeVal($1));
};
// Include derived types in the Types production.
//
UpRTypes : '\\' EUINT64VAL { // Type UpReference
if ($2 > (uint64_t)~0U) ThrowException("Value out of range!");
OpaqueType *OT = OpaqueType::get(); // Use temporary placeholder
UpRefs.push_back(UpRefRecord((unsigned)$2, OT)); // Add to vector...
$$ = new PATypeHolder(OT);
UR_OUT("New Upreference!\n");
}
| UpRTypesV '(' ArgTypeListI ')' { // Function derived type?
std::vector<const Type*> Params;
mapto($3->begin(), $3->end(), std::back_inserter(Params),
std::mem_fun_ref(&PATypeHolder::get));
bool isVarArg = Params.size() && Params.back() == Type::VoidTy;
if (isVarArg) Params.pop_back();
$$ = new PATypeHolder(HandleUpRefs(FunctionType::get(*$1,Params,isVarArg)));
delete $3; // Delete the argument list
delete $1; // Delete the return type handle
}
| '[' EUINT64VAL 'x' UpRTypes ']' { // Sized array type?
$$ = new PATypeHolder(HandleUpRefs(ArrayType::get(*$4, (unsigned)$2)));
delete $4;
}
| '{' TypeListI '}' { // Structure type?
std::vector<const Type*> Elements;
mapto($2->begin(), $2->end(), std::back_inserter(Elements),
std::mem_fun_ref(&PATypeHolder::get));
$$ = new PATypeHolder(HandleUpRefs(StructType::get(Elements)));
delete $2;
}
| '{' '}' { // Empty structure type?
$$ = new PATypeHolder(StructType::get(std::vector<const Type*>()));
}
| UpRTypes '*' { // Pointer type?
$$ = new PATypeHolder(HandleUpRefs(PointerType::get(*$1)));
delete $1;
};
// TypeList - Used for struct declarations and as a basis for function type
// declaration type lists
//
TypeListI : UpRTypes {
$$ = new std::list<PATypeHolder>();
$$->push_back(*$1); delete $1;
}
| TypeListI ',' UpRTypes {
($$=$1)->push_back(*$3); delete $3;
};
// ArgTypeList - List of types for a function type declaration...
ArgTypeListI : TypeListI
| TypeListI ',' DOTDOTDOT {
($$=$1)->push_back(Type::VoidTy);
}
| DOTDOTDOT {
($$ = new std::list<PATypeHolder>())->push_back(Type::VoidTy);
}
| /*empty*/ {
$$ = new std::list<PATypeHolder>();
};
// ConstVal - The various declarations that go into the constant pool. This
// production is used ONLY to represent constants that show up AFTER a 'const',
// 'constant' or 'global' token at global scope. Constants that can be inlined
// into other expressions (such as integers and constexprs) are handled by the
// ResolvedVal, ValueRef and ConstValueRef productions.
//
ConstVal: Types '[' ConstVector ']' { // Nonempty unsized arr
const ArrayType *ATy = dyn_cast<ArrayType>($1->get());
if (ATy == 0)
ThrowException("Cannot make array constant with type: '" +
(*$1)->getDescription() + "'!");
const Type *ETy = ATy->getElementType();
int NumElements = ATy->getNumElements();
// Verify that we have the correct size...
if (NumElements != -1 && NumElements != (int)$3->size())
ThrowException("Type mismatch: constant sized array initialized with " +
utostr($3->size()) + " arguments, but has size of " +
itostr(NumElements) + "!");
// Verify all elements are correct type!
for (unsigned i = 0; i < $3->size(); i++) {
if (ETy != (*$3)[i]->getType())
ThrowException("Element #" + utostr(i) + " is not of type '" +
ETy->getDescription() +"' as required!\nIt is of type '"+
(*$3)[i]->getType()->getDescription() + "'.");
}
$$ = ConstantArray::get(ATy, *$3);
delete $1; delete $3;
}
| Types '[' ']' {
const ArrayType *ATy = dyn_cast<ArrayType>($1->get());
if (ATy == 0)
ThrowException("Cannot make array constant with type: '" +
(*$1)->getDescription() + "'!");
int NumElements = ATy->getNumElements();
if (NumElements != -1 && NumElements != 0)
ThrowException("Type mismatch: constant sized array initialized with 0"
" arguments, but has size of " + itostr(NumElements) +"!");
$$ = ConstantArray::get(ATy, std::vector<Constant*>());
delete $1;
}
| Types 'c' STRINGCONSTANT {
const ArrayType *ATy = dyn_cast<ArrayType>($1->get());
if (ATy == 0)
ThrowException("Cannot make array constant with type: '" +
(*$1)->getDescription() + "'!");
int NumElements = ATy->getNumElements();
const Type *ETy = ATy->getElementType();
char *EndStr = UnEscapeLexed($3, true);
if (NumElements != -1 && NumElements != (EndStr-$3))
ThrowException("Can't build string constant of size " +
itostr((int)(EndStr-$3)) +
" when array has size " + itostr(NumElements) + "!");
std::vector<Constant*> Vals;
if (ETy == Type::SByteTy) {
for (char *C = $3; C != EndStr; ++C)
Vals.push_back(ConstantSInt::get(ETy, *C));
} else if (ETy == Type::UByteTy) {
for (char *C = $3; C != EndStr; ++C)
Vals.push_back(ConstantUInt::get(ETy, (unsigned char)*C));
} else {
free($3);
ThrowException("Cannot build string arrays of non byte sized elements!");
}
free($3);
$$ = ConstantArray::get(ATy, Vals);
delete $1;
}
| Types '{' ConstVector '}' {
const StructType *STy = dyn_cast<StructType>($1->get());
if (STy == 0)
ThrowException("Cannot make struct constant with type: '" +
(*$1)->getDescription() + "'!");
if ($3->size() != STy->getNumContainedTypes())
ThrowException("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))
ThrowException("Expected type '" +
STy->getElementType(i)->getDescription() +
"' for element #" + utostr(i) +
" of structure initializer!");
$$ = ConstantStruct::get(STy, *$3);
delete $1; delete $3;
}
| Types '{' '}' {
const StructType *STy = dyn_cast<StructType>($1->get());
if (STy == 0)
ThrowException("Cannot make struct constant with type: '" +
(*$1)->getDescription() + "'!");
if (STy->getNumContainedTypes() != 0)
ThrowException("Illegal number of initializers for structure type!");
$$ = ConstantStruct::get(STy, std::vector<Constant*>());
delete $1;
}
| Types NULL_TOK {
const PointerType *PTy = dyn_cast<PointerType>($1->get());
if (PTy == 0)
ThrowException("Cannot make null pointer constant with type: '" +
(*$1)->getDescription() + "'!");
$$ = ConstantPointerNull::get(PTy);
delete $1;
}
| Types SymbolicValueRef {
const PointerType *Ty = dyn_cast<PointerType>($1->get());
if (Ty == 0)
ThrowException("Global const reference must be a pointer type!");
// ConstExprs can exist in the body of a function, thus creating
// ConstantPointerRefs whenever they refer to a variable. Because we are in
// the context of a function, getValNonImprovising will search the functions
// symbol table instead of the module symbol table for the global symbol,
// which throws things all off. To get around this, we just tell
// getValNonImprovising that we are at global scope here.
//
Function *SavedCurFn = CurFun.CurrentFunction;
CurFun.CurrentFunction = 0;
Value *V = getValNonImprovising(Ty, $2);
CurFun.CurrentFunction = SavedCurFn;
// If this is an initializer for a constant pointer, which is referencing a
// (currently) undefined variable, create a stub now that shall be replaced
// in the future with the right type of variable.
//
if (V == 0) {
assert(isa<PointerType>(Ty) && "Globals may only be used as pointers!");
const PointerType *PT = cast<PointerType>(Ty);
// First check to see if the forward references value is already created!
PerModuleInfo::GlobalRefsType::iterator I =
CurModule.GlobalRefs.find(std::make_pair(PT, $2));
if (I != CurModule.GlobalRefs.end()) {
V = I->second; // Placeholder already exists, use it...
$2.destroy();
} else {
// Create a placeholder for the global variable reference...
GlobalVariable *GV = new GlobalVariable(PT->getElementType(),
false,
GlobalValue::ExternalLinkage);
// Keep track of the fact that we have a forward ref to recycle it
CurModule.GlobalRefs.insert(std::make_pair(std::make_pair(PT, $2), GV));
// Must temporarily push this value into the module table...
CurModule.CurrentModule->getGlobalList().push_back(GV);
V = GV;
}
}
GlobalValue *GV = cast<GlobalValue>(V);
$$ = ConstantPointerRef::get(GV);
delete $1; // Free the type handle
}
| Types ConstExpr {
if ($1->get() != $2->getType())
ThrowException("Mismatched types for constant expression!");
$$ = $2;
delete $1;
}
| Types ZEROINITIALIZER {
$$ = Constant::getNullValue($1->get());
delete $1;
};
ConstVal : SIntType EINT64VAL { // integral constants
if (!ConstantSInt::isValueValidForType($1, $2))
ThrowException("Constant value doesn't fit in type!");
$$ = ConstantSInt::get($1, $2);
}
| UIntType EUINT64VAL { // integral constants
if (!ConstantUInt::isValueValidForType($1, $2))
ThrowException("Constant value doesn't fit in type!");
$$ = ConstantUInt::get($1, $2);
}
| BOOL TRUETOK { // Boolean constants
$$ = ConstantBool::True;
}
| BOOL FALSETOK { // Boolean constants
$$ = ConstantBool::False;
}
| FPType FPVAL { // Float & Double constants
$$ = ConstantFP::get($1, $2);
};
ConstExpr: CAST '(' ConstVal TO Types ')' {
if (!$3->getType()->isFirstClassType())
ThrowException("cast constant expression from a non-primitive type: '" +
$3->getType()->getDescription() + "'!");
if (!$5->get()->isFirstClassType())
ThrowException("cast constant expression to a non-primitive type: '" +
$5->get()->getDescription() + "'!");
$$ = ConstantExpr::getCast($3, $5->get());
delete $5;
}
| GETELEMENTPTR '(' ConstVal IndexList ')' {
if (!isa<PointerType>($3->getType()))
ThrowException("GetElementPtr requires a pointer operand!");
// LLVM 1.2 and earlier used ubyte struct indices. Convert any ubyte struct
// indices to uint struct indices for compatibility.
generic_gep_type_iterator<std::vector<Value*>::iterator>
GTI = gep_type_begin($3->getType(), $4->begin(), $4->end()),
GTE = gep_type_end($3->getType(), $4->begin(), $4->end());
for (unsigned i = 0, e = $4->size(); i != e && GTI != GTE; ++i, ++GTI)
if (isa<StructType>(*GTI)) // Only change struct indices
if (ConstantUInt *CUI = dyn_cast<ConstantUInt>((*$4)[i]))
if (CUI->getType() == Type::UByteTy)
(*$4)[i] = ConstantExpr::getCast(CUI, Type::UIntTy);
const Type *IdxTy =
GetElementPtrInst::getIndexedType($3->getType(), *$4, true);
if (!IdxTy)
ThrowException("Index list invalid for constant getelementptr!");
std::vector<Constant*> IdxVec;
for (unsigned i = 0, e = $4->size(); i != e; ++i)
if (Constant *C = dyn_cast<Constant>((*$4)[i]))
IdxVec.push_back(C);
else
ThrowException("Indices to constant getelementptr must be constants!");
delete $4;
$$ = ConstantExpr::getGetElementPtr($3, IdxVec);
}
| SELECT '(' ConstVal ',' ConstVal ',' ConstVal ')' {
if ($3->getType() != Type::BoolTy)
ThrowException("Select condition must be of boolean type!");
if ($5->getType() != $7->getType())
ThrowException("Select operand types must match!");
$$ = ConstantExpr::getSelect($3, $5, $7);
}
| BinaryOps '(' ConstVal ',' ConstVal ')' {
if ($3->getType() != $5->getType())
ThrowException("Binary operator types must match!");
$$ = ConstantExpr::get($1, $3, $5);
}
| ShiftOps '(' ConstVal ',' ConstVal ')' {
if ($5->getType() != Type::UByteTy)
ThrowException("Shift count for shift constant must be unsigned byte!");
if (!$3->getType()->isInteger())
ThrowException("Shift constant expression requires integer operand!");
$$ = ConstantExpr::get($1, $3, $5);
};
// ConstVector - A list of comma separated constants.
ConstVector : ConstVector ',' ConstVal {
($$ = $1)->push_back($3);
}
| ConstVal {
$$ = new std::vector<Constant*>();
$$->push_back($1);
};
// GlobalType - Match either GLOBAL or CONSTANT for global declarations...
GlobalType : GLOBAL { $$ = false; } | CONSTANT { $$ = true; };
//===----------------------------------------------------------------------===//
// Rules to match Modules
//===----------------------------------------------------------------------===//
// Module rule: Capture the result of parsing the whole file into a result
// variable...
//
Module : FunctionList {
$$ = ParserResult = $1;
CurModule.ModuleDone();
};
// FunctionList - A list of functions, preceeded by a constant pool.
//
FunctionList : FunctionList Function {
$$ = $1;
CurFun.FunctionDone();
}
| FunctionList FunctionProto {
$$ = $1;
}
| FunctionList IMPLEMENTATION {
$$ = $1;
}
| ConstPool {
$$ = CurModule.CurrentModule;
// Resolve circular types before we parse the body of the module
ResolveTypes(CurModule.LateResolveTypes);
};
// ConstPool - Constants with optional names assigned to them.
ConstPool : ConstPool OptAssign CONST ConstVal {
// FIXME: THIS SHOULD REALLY BE ELIMINATED. It is totally unneeded.
if (!setValueNameMergingDuplicates($4, $2))
InsertValue($4);
}
| ConstPool OptAssign TYPE TypesV { // Types can be defined in the const pool
// 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($2, $4->get());
// TODO: FIXME when Type are not const
if (!setTypeName(const_cast<Type*>($4->get()), $2)) {
// If this is not a redefinition of a type...
if (!$2) {
InsertType($4->get(),
inFunctionScope() ? CurFun.Types : CurModule.Types);
}
}
delete $4;
}
| ConstPool FunctionProto { // Function prototypes can be in const pool
}
| ConstPool OptAssign OptLinkage GlobalType ConstVal {
const Type *Ty = $5->getType();
// Global declarations appear in Constant Pool
Constant *Initializer = $5;
if (Initializer == 0)
ThrowException("Global value initializer is not a constant!");
GlobalVariable *GV = new GlobalVariable(Ty, $4, $3, Initializer);
if (!setValueNameMergingDuplicates(GV, $2)) { // If not redefining...
CurModule.CurrentModule->getGlobalList().push_back(GV);
int Slot = InsertValue(GV, CurModule.Values);
if (Slot != -1) {
CurModule.DeclareNewGlobalValue(GV, ValID::create(Slot));
} else {
CurModule.DeclareNewGlobalValue(GV, ValID::create(
(char*)GV->getName().c_str()));
}
}
}
| ConstPool OptAssign EXTERNAL GlobalType Types {
const Type *Ty = *$5;
// Global declarations appear in Constant Pool
GlobalVariable *GV = new GlobalVariable(Ty,$4,GlobalValue::ExternalLinkage);
if (!setValueNameMergingDuplicates(GV, $2)) { // If not redefining...
CurModule.CurrentModule->getGlobalList().push_back(GV);
int Slot = InsertValue(GV, CurModule.Values);
if (Slot != -1) {
CurModule.DeclareNewGlobalValue(GV, ValID::create(Slot));
} else {
assert(GV->hasName() && "Not named and not numbered!?");
CurModule.DeclareNewGlobalValue(GV, ValID::create(
(char*)GV->getName().c_str()));
}
}
delete $5;
}
| ConstPool TARGET TargetDefinition {
}
| /* empty: end of list */ {
};
BigOrLittle : BIG { $$ = Module::BigEndian; };
BigOrLittle : LITTLE { $$ = Module::LittleEndian; };
TargetDefinition : ENDIAN '=' BigOrLittle {
CurModule.CurrentModule->setEndianness($3);
}
| POINTERSIZE '=' EUINT64VAL {
if ($3 == 32)
CurModule.CurrentModule->setPointerSize(Module::Pointer32);
else if ($3 == 64)
CurModule.CurrentModule->setPointerSize(Module::Pointer64);
else
ThrowException("Invalid pointer size: '" + utostr($3) + "'!");
};
//===----------------------------------------------------------------------===//
// Rules to match Function Headers
//===----------------------------------------------------------------------===//
Name : VAR_ID | STRINGCONSTANT;
OptName : Name | /*empty*/ { $$ = 0; };
ArgVal : Types OptName {
if (*$1 == Type::VoidTy)
ThrowException("void typed arguments are invalid!");
$$ = new std::pair<PATypeHolder*, char*>($1, $2);
};
ArgListH : ArgListH ',' ArgVal {
$$ = $1;
$1->push_back(*$3);
delete $3;
}
| ArgVal {
$$ = new std::vector<std::pair<PATypeHolder*,char*> >();
$$->push_back(*$1);
delete $1;
};
ArgList : ArgListH {
$$ = $1;
}
| ArgListH ',' DOTDOTDOT {
$$ = $1;
$$->push_back(std::pair<PATypeHolder*,
char*>(new PATypeHolder(Type::VoidTy), 0));
}
| DOTDOTDOT {
$$ = new std::vector<std::pair<PATypeHolder*,char*> >();
$$->push_back(std::make_pair(new PATypeHolder(Type::VoidTy), (char*)0));
}
| /* empty */ {
$$ = 0;
};
FunctionHeaderH : TypesV Name '(' ArgList ')' {
UnEscapeLexed($2);
std::string FunctionName($2);
if (!(*$1)->isFirstClassType() && *$1 != Type::VoidTy)
ThrowException("LLVM functions cannot return aggregate types!");
std::vector<const Type*> ParamTypeList;
if ($4) { // If there are arguments...
for (std::vector<std::pair<PATypeHolder*,char*> >::iterator I = $4->begin();
I != $4->end(); ++I)
ParamTypeList.push_back(I->first->get());
}
bool isVarArg = ParamTypeList.size() && ParamTypeList.back() == Type::VoidTy;
if (isVarArg) ParamTypeList.pop_back();
const FunctionType *FT = FunctionType::get(*$1, ParamTypeList, isVarArg);
const PointerType *PFT = PointerType::get(FT);
delete $1;
Function *Fn = 0;
// Is the function already in symtab?
if ((Fn = CurModule.CurrentModule->getFunction(FunctionName, FT))) {
// Yes it is. If this is the case, either we need to be a forward decl,
// or it needs to be.
if (!CurFun.isDeclare && !Fn->isExternal())
ThrowException("Redefinition of function '" + FunctionName + "'!");
// Make sure to strip off any argument names so we can't get conflicts...
for (Function::aiterator AI = Fn->abegin(), AE = Fn->aend(); AI != AE; ++AI)
AI->setName("");
} else { // Not already defined?
Fn = new Function(FT, GlobalValue::ExternalLinkage, FunctionName,
CurModule.CurrentModule);
InsertValue(Fn, CurModule.Values);
CurModule.DeclareNewGlobalValue(Fn, ValID::create($2));
}
free($2); // Free strdup'd memory!
CurFun.FunctionStart(Fn);
// Add all of the arguments we parsed to the function...
if ($4) { // Is null if empty...
if (isVarArg) { // Nuke the last entry
assert($4->back().first->get() == Type::VoidTy && $4->back().second == 0&&
"Not a varargs marker!");
delete $4->back().first;
$4->pop_back(); // Delete the last entry
}
Function::aiterator ArgIt = Fn->abegin();
for (std::vector<std::pair<PATypeHolder*, char*> >::iterator I =$4->begin();
I != $4->end(); ++I, ++ArgIt) {
delete I->first; // Delete the typeholder...
setValueName(ArgIt, I->second); // Insert arg into symtab...
InsertValue(ArgIt);
}
delete $4; // We're now done with the argument list
}
};
BEGIN : BEGINTOK | '{'; // Allow BEGIN or '{' to start a function
FunctionHeader : OptLinkage FunctionHeaderH BEGIN {
$$ = CurFun.CurrentFunction;
// Make sure that we keep track of the linkage type even if there was a
// previous "declare".
$$->setLinkage($1);
// Resolve circular types before we parse the body of the function.
ResolveTypes(CurFun.LateResolveTypes);
};
END : ENDTOK | '}'; // Allow end of '}' to end a function
Function : BasicBlockList END {
$$ = $1;
};
FunctionProto : DECLARE { CurFun.isDeclare = true; } FunctionHeaderH {
$$ = CurFun.CurrentFunction;
CurFun.FunctionDone();
};
//===----------------------------------------------------------------------===//
// Rules to match Basic Blocks
//===----------------------------------------------------------------------===//
ConstValueRef : ESINT64VAL { // A reference to a direct constant
$$ = ValID::create($1);
}
| EUINT64VAL {
$$ = ValID::create($1);
}
| FPVAL { // Perhaps it's an FP constant?
$$ = ValID::create($1);
}
| TRUETOK {
$$ = ValID::create(ConstantBool::True);
}
| FALSETOK {
$$ = ValID::create(ConstantBool::False);
}
| NULL_TOK {
$$ = ValID::createNull();
}
| ConstExpr {
$$ = ValID::create($1);
};
// SymbolicValueRef - Reference to one of two ways of symbolically refering to
// another value.
//
SymbolicValueRef : INTVAL { // Is it an integer reference...?
$$ = ValID::create($1);
}
| Name { // Is it a named reference...?
$$ = ValID::create($1);
};
// 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 {
$$ = getVal(*$1, $2); delete $1;
};
BasicBlockList : BasicBlockList BasicBlock {
$$ = $1;
}
| FunctionHeader BasicBlock { // Do not allow functions with 0 basic blocks
$$ = $1;
};
// Basic blocks are terminated by branching instructions:
// br, br/cc, switch, ret
//
BasicBlock : InstructionList OptAssign BBTerminatorInst {
setValueName($3, $2);
InsertValue($3);
$1->getInstList().push_back($3);
InsertValue($1);
$$ = $1;
}
| LABELSTR InstructionList OptAssign BBTerminatorInst {
setValueName($4, $3);
InsertValue($4);
$2->getInstList().push_back($4);
setValueName($2, $1);
InsertValue($2);
$$ = $2;
};
InstructionList : InstructionList Inst {
$1->getInstList().push_back($2);
$$ = $1;
}
| /* empty */ {
$$ = CurBB = new BasicBlock("", CurFun.CurrentFunction);
};
BBTerminatorInst : RET ResolvedVal { // Return with a result...
$$ = new ReturnInst($2);
}
| RET VOID { // Return with no result...
$$ = new ReturnInst();
}
| BR LABEL ValueRef { // Unconditional Branch...
$$ = new BranchInst(cast<BasicBlock>(getVal(Type::LabelTy, $3)));
} // Conditional Branch...
| BR BOOL ValueRef ',' LABEL ValueRef ',' LABEL ValueRef {
$$ = new BranchInst(cast<BasicBlock>(getVal(Type::LabelTy, $6)),
cast<BasicBlock>(getVal(Type::LabelTy, $9)),
getVal(Type::BoolTy, $3));
}
| SWITCH IntType ValueRef ',' LABEL ValueRef '[' JumpTable ']' {
SwitchInst *S = new SwitchInst(getVal($2, $3),
cast<BasicBlock>(getVal(Type::LabelTy, $6)));
$$ = S;
std::vector<std::pair<Constant*,BasicBlock*> >::iterator I = $8->begin(),
E = $8->end();
for (; I != E; ++I)
S->addCase(I->first, I->second);
delete $8;
}
| SWITCH IntType ValueRef ',' LABEL ValueRef '[' ']' {
SwitchInst *S = new SwitchInst(getVal($2, $3),
cast<BasicBlock>(getVal(Type::LabelTy, $6)));
$$ = S;
}
| INVOKE TypesV ValueRef '(' ValueRefListE ')' TO ResolvedVal
UNWIND ResolvedVal {
const PointerType *PFTy;
const FunctionType *Ty;
if (!(PFTy = dyn_cast<PointerType>($2->get())) ||
!(Ty = dyn_cast<FunctionType>(PFTy->getElementType()))) {
// Pull out the types of all of the arguments...
std::vector<const Type*> ParamTypes;
if ($5) {
for (std::vector<Value*>::iterator I = $5->begin(), E = $5->end();
I != E; ++I)
ParamTypes.push_back((*I)->getType());
}
bool isVarArg = ParamTypes.size() && ParamTypes.back() == Type::VoidTy;
if (isVarArg) ParamTypes.pop_back();
Ty = FunctionType::get($2->get(), ParamTypes, isVarArg);
PFTy = PointerType::get(Ty);
}
Value *V = getVal(PFTy, $3); // Get the function we're calling...
BasicBlock *Normal = dyn_cast<BasicBlock>($8);
BasicBlock *Except = dyn_cast<BasicBlock>($10);
if (Normal == 0 || Except == 0)
ThrowException("Invoke instruction without label destinations!");
// Create the call node...
if (!$5) { // Has no arguments?
$$ = new InvokeInst(V, Normal, Except, std::vector<Value*>());
} 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();
std::vector<Value*>::iterator ArgI = $5->begin(), ArgE = $5->end();
for (; ArgI != ArgE && I != E; ++ArgI, ++I)
if ((*ArgI)->getType() != *I)
ThrowException("Parameter " +(*ArgI)->getName()+ " is not of type '" +
(*I)->getDescription() + "'!");
if (I != E || (ArgI != ArgE && !Ty->isVarArg()))
ThrowException("Invalid number of parameters detected!");
$$ = new InvokeInst(V, Normal, Except, *$5);
}
delete $2;
delete $5;
}
| UNWIND {
$$ = new UnwindInst();
};
JumpTable : JumpTable IntType ConstValueRef ',' LABEL ValueRef {
$$ = $1;
Constant *V = cast<Constant>(getValNonImprovising($2, $3));
if (V == 0)
ThrowException("May only switch on a constant pool value!");
$$->push_back(std::make_pair(V, cast<BasicBlock>(getVal($5, $6))));
}
| IntType ConstValueRef ',' LABEL ValueRef {
$$ = new std::vector<std::pair<Constant*, BasicBlock*> >();
Constant *V = cast<Constant>(getValNonImprovising($1, $2));
if (V == 0)
ThrowException("May only switch on a constant pool value!");
$$->push_back(std::make_pair(V, cast<BasicBlock>(getVal($4, $5))));
};
Inst : OptAssign InstVal {
// Is this definition named?? if so, assign the name...
setValueName($2, $1);
InsertValue($2);
$$ = $2;
};
PHIList : Types '[' ValueRef ',' ValueRef ']' { // Used for PHI nodes
$$ = new std::list<std::pair<Value*, BasicBlock*> >();
$$->push_back(std::make_pair(getVal(*$1, $3),
cast<BasicBlock>(getVal(Type::LabelTy, $5))));
delete $1;
}
| PHIList ',' '[' ValueRef ',' ValueRef ']' {
$$ = $1;
$1->push_back(std::make_pair(getVal($1->front().first->getType(), $4),
cast<BasicBlock>(getVal(Type::LabelTy, $6))));
};
ValueRefList : ResolvedVal { // Used for call statements, and memory insts...
$$ = new std::vector<Value*>();
$$->push_back($1);
}
| ValueRefList ',' ResolvedVal {
$$ = $1;
$1->push_back($3);
};
// ValueRefListE - Just like ValueRefList, except that it may also be empty!
ValueRefListE : ValueRefList | /*empty*/ { $$ = 0; };
InstVal : ArithmeticOps Types ValueRef ',' ValueRef {
if (!(*$2)->isInteger() && !(*$2)->isFloatingPoint())
ThrowException("Arithmetic operator requires integer or FP operands!");
$$ = BinaryOperator::create($1, getVal(*$2, $3), getVal(*$2, $5));
if ($$ == 0)
ThrowException("binary operator returned null!");
delete $2;
}
| LogicalOps Types ValueRef ',' ValueRef {
if (!(*$2)->isIntegral())
ThrowException("Logical operator requires integral operands!");
$$ = BinaryOperator::create($1, getVal(*$2, $3), getVal(*$2, $5));
if ($$ == 0)
ThrowException("binary operator returned null!");
delete $2;
}
| SetCondOps Types ValueRef ',' ValueRef {
$$ = new SetCondInst($1, getVal(*$2, $3), getVal(*$2, $5));
if ($$ == 0)
ThrowException("binary operator returned null!");
delete $2;
}
| NOT ResolvedVal {
std::cerr << "WARNING: Use of eliminated 'not' instruction:"
<< " Replacing with 'xor'.\n";
Value *Ones = ConstantIntegral::getAllOnesValue($2->getType());
if (Ones == 0)
ThrowException("Expected integral type for not instruction!");
$$ = BinaryOperator::create(Instruction::Xor, $2, Ones);
if ($$ == 0)
ThrowException("Could not create a xor instruction!");
}
| ShiftOps ResolvedVal ',' ResolvedVal {
if ($4->getType() != Type::UByteTy)
ThrowException("Shift amount must be ubyte!");
if (!$2->getType()->isInteger())
ThrowException("Shift constant expression requires integer operand!");
$$ = new ShiftInst($1, $2, $4);
}
| CAST ResolvedVal TO Types {
if (!$4->get()->isFirstClassType())
ThrowException("cast instruction to a non-primitive type: '" +
$4->get()->getDescription() + "'!");
$$ = new CastInst($2, *$4);
delete $4;
}
| SELECT ResolvedVal ',' ResolvedVal ',' ResolvedVal {
if ($2->getType() != Type::BoolTy)
ThrowException("select condition must be boolean!");
if ($4->getType() != $6->getType())
ThrowException("select value types should match!");
$$ = new SelectInst($2, $4, $6);
}
| VA_ARG ResolvedVal ',' Types {
// FIXME: This is emulation code for an obsolete syntax. This should be
// removed at some point.
if (!ObsoleteVarArgs) {
std::cerr << "WARNING: this file uses obsolete features. "
<< "Assemble and disassemble to update it.\n";
ObsoleteVarArgs = true;
}
// First, load the valist...
Instruction *CurVAList = new LoadInst($2, "");
CurBB->getInstList().push_back(CurVAList);
// Emit the vaarg instruction.
$$ = new VAArgInst(CurVAList, *$4);
// Now we must advance the pointer and update it in memory.
Instruction *TheVANext = new VANextInst(CurVAList, *$4);
CurBB->getInstList().push_back(TheVANext);
CurBB->getInstList().push_back(new StoreInst(TheVANext, $2));
delete $4;
}
| VAARG ResolvedVal ',' Types {
$$ = new VAArgInst($2, *$4);
delete $4;
}
| VANEXT ResolvedVal ',' Types {
$$ = new VANextInst($2, *$4);
delete $4;
}
| PHI_TOK PHIList {
const Type *Ty = $2->front().first->getType();
if (!Ty->isFirstClassType())
ThrowException("PHI node operands must be of first class type!");
$$ = new PHINode(Ty);
$$->op_reserve($2->size()*2);
while ($2->begin() != $2->end()) {
if ($2->front().first->getType() != Ty)
ThrowException("All elements of a PHI node must be of the same type!");
cast<PHINode>($$)->addIncoming($2->front().first, $2->front().second);
$2->pop_front();
}
delete $2; // Free the list...
}
| CALL TypesV ValueRef '(' ValueRefListE ')' {
const PointerType *PFTy;
const FunctionType *Ty;
if (!(PFTy = dyn_cast<PointerType>($2->get())) ||
!(Ty = dyn_cast<FunctionType>(PFTy->getElementType()))) {
// Pull out the types of all of the arguments...
std::vector<const Type*> ParamTypes;
if ($5) {
for (std::vector<Value*>::iterator I = $5->begin(), E = $5->end();
I != E; ++I)
ParamTypes.push_back((*I)->getType());
}
bool isVarArg = ParamTypes.size() && ParamTypes.back() == Type::VoidTy;
if (isVarArg) ParamTypes.pop_back();
Ty = FunctionType::get($2->get(), ParamTypes, isVarArg);
PFTy = PointerType::get(Ty);
}
Value *V = getVal(PFTy, $3); // Get the function we're calling...
// Create the call node...
if (!$5) { // Has no arguments?
// Make sure no arguments is a good thing!
if (Ty->getNumParams() != 0)
ThrowException("No arguments passed to a function that "
"expects arguments!");
$$ = new CallInst(V, std::vector<Value*>());
} 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();
std::vector<Value*>::iterator ArgI = $5->begin(), ArgE = $5->end();
for (; ArgI != ArgE && I != E; ++ArgI, ++I)
if ((*ArgI)->getType() != *I)
ThrowException("Parameter " +(*ArgI)->getName()+ " is not of type '" +
(*I)->getDescription() + "'!");
if (I != E || (ArgI != ArgE && !Ty->isVarArg()))
ThrowException("Invalid number of parameters detected!");
$$ = new CallInst(V, *$5);
}
delete $2;
delete $5;
}
| MemoryInst {
$$ = $1;
};
// IndexList - List of indices for GEP based instructions...
IndexList : ',' ValueRefList {
$$ = $2;
} | /* empty */ {
$$ = new std::vector<Value*>();
};
OptVolatile : VOLATILE {
$$ = true;
}
| /* empty */ {
$$ = false;
};
MemoryInst : MALLOC Types {
$$ = new MallocInst(*$2);
delete $2;
}
| MALLOC Types ',' UINT ValueRef {
$$ = new MallocInst(*$2, getVal($4, $5));
delete $2;
}
| ALLOCA Types {
$$ = new AllocaInst(*$2);
delete $2;
}
| ALLOCA Types ',' UINT ValueRef {
$$ = new AllocaInst(*$2, getVal($4, $5));
delete $2;
}
| FREE ResolvedVal {
if (!isa<PointerType>($2->getType()))
ThrowException("Trying to free nonpointer type " +
$2->getType()->getDescription() + "!");
$$ = new FreeInst($2);
}
| OptVolatile LOAD Types ValueRef {
if (!isa<PointerType>($3->get()))
ThrowException("Can't load from nonpointer type: " +
(*$3)->getDescription());
$$ = new LoadInst(getVal(*$3, $4), "", $1);
delete $3;
}
| OptVolatile STORE ResolvedVal ',' Types ValueRef {
const PointerType *PT = dyn_cast<PointerType>($5->get());
if (!PT)
ThrowException("Can't store to a nonpointer type: " +
(*$5)->getDescription());
const Type *ElTy = PT->getElementType();
if (ElTy != $3->getType())
ThrowException("Can't store '" + $3->getType()->getDescription() +
"' into space of type '" + ElTy->getDescription() + "'!");
$$ = new StoreInst($3, getVal(*$5, $6), $1);
delete $5;
}
| GETELEMENTPTR Types ValueRef IndexList {
if (!isa<PointerType>($2->get()))
ThrowException("getelementptr insn requires pointer operand!");
// LLVM 1.2 and earlier used ubyte struct indices. Convert any ubyte struct
// indices to uint struct indices for compatibility.
generic_gep_type_iterator<std::vector<Value*>::iterator>
GTI = gep_type_begin($2->get(), $4->begin(), $4->end()),
GTE = gep_type_end($2->get(), $4->begin(), $4->end());
for (unsigned i = 0, e = $4->size(); i != e && GTI != GTE; ++i, ++GTI)
if (isa<StructType>(*GTI)) // Only change struct indices
if (ConstantUInt *CUI = dyn_cast<ConstantUInt>((*$4)[i]))
if (CUI->getType() == Type::UByteTy)
(*$4)[i] = ConstantExpr::getCast(CUI, Type::UIntTy);
if (!GetElementPtrInst::getIndexedType(*$2, *$4, true))
ThrowException("Invalid getelementptr indices for type '" +
(*$2)->getDescription()+ "'!");
$$ = new GetElementPtrInst(getVal(*$2, $3), *$4);
delete $2; delete $4;
};
%%
int yyerror(const char *ErrorMsg) {
std::string where
= std::string((CurFilename == "-") ? std::string("<stdin>") : CurFilename)
+ ":" + utostr((unsigned) llvmAsmlineno) + ": ";
std::string errMsg = std::string(ErrorMsg) + "\n" + where + " while reading ";
if (yychar == YYEMPTY || yychar == 0)
errMsg += "end-of-file.";
else
errMsg += "token: '" + std::string(llvmAsmtext, llvmAsmleng) + "'";
ThrowException(errMsg);
return 0;
}
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