//
//===----------------------------------------------------------------------===//
-#include "llvm/Analysis/SlotCalculator.h"
-#include "llvm/ConstantPool.h"
-#include "llvm/Method.h"
+#include "llvm/SlotCalculator.h"
+#include "llvm/Analysis/ConstantsScanner.h"
#include "llvm/Module.h"
-#include "llvm/BasicBlock.h"
-#include "llvm/ConstPoolVals.h"
#include "llvm/iOther.h"
+#include "llvm/Constant.h"
#include "llvm/DerivedTypes.h"
+#include "llvm/SymbolTable.h"
+#include "Support/DepthFirstIterator.h"
+#include "Support/STLExtras.h"
+#include <algorithm>
+
+#if 0
+#define SC_DEBUG(X) cerr << X
+#else
+#define SC_DEBUG(X)
+#endif
SlotCalculator::SlotCalculator(const Module *M, bool IgnoreNamed) {
IgnoreNamedNodes = IgnoreNamed;
}
if (M == 0) return; // Empty table...
-
- bool Result = processModule(M);
- assert(Result == false && "Error in processModule!");
+ processModule();
}
-SlotCalculator::SlotCalculator(const Method *M, bool IgnoreNamed) {
+SlotCalculator::SlotCalculator(const Function *M, bool IgnoreNamed) {
IgnoreNamedNodes = IgnoreNamed;
TheModule = M ? M->getParent() : 0;
if (TheModule == 0) return; // Empty table...
- bool Result = processModule(TheModule);
- assert(Result == false && "Error in processModule!");
+ processModule(); // Process module level stuff
+ incorporateFunction(M); // Start out in incorporated state
+}
+
+
+// processModule - Process all of the module level function declarations and
+// types that are available.
+//
+void SlotCalculator::processModule() {
+ SC_DEBUG("begin processModule!\n");
+
+ // Add all of the constants that the global variables might refer to first.
+ //
+ for (Module::const_giterator I = TheModule->gbegin(), E = TheModule->gend();
+ I != E; ++I) {
+ if (I->hasInitializer())
+ insertValue(I->getInitializer());
+ }
- incorporateMethod(M);
+ // Add all of the global variables to the value table...
+ //
+ for(Module::const_giterator I = TheModule->gbegin(), E = TheModule->gend();
+ I != E; ++I)
+ insertValue(I);
+
+ // Scavenge the types out of the functions, then add the functions themselves
+ // to the value table...
+ //
+ for(Module::const_iterator I = TheModule->begin(), E = TheModule->end();
+ I != E; ++I)
+ insertValue(I);
+
+ // Insert constants that are named at module level into the slot pool so that
+ // the module symbol table can refer to them...
+ //
+ if (TheModule->hasSymbolTable() && !IgnoreNamedNodes) {
+ SC_DEBUG("Inserting SymbolTable values:\n");
+ processSymbolTable(TheModule->getSymbolTable());
+ }
+
+ SC_DEBUG("end processModule!\n");
}
-void SlotCalculator::incorporateMethod(const Method *M) {
+// processSymbolTable - Insert all of the values in the specified symbol table
+// into the values table...
+//
+void SlotCalculator::processSymbolTable(const SymbolTable *ST) {
+ for (SymbolTable::const_iterator I = ST->begin(), E = ST->end(); I != E; ++I)
+ for (SymbolTable::type_const_iterator TI = I->second.begin(),
+ TE = I->second.end(); TI != TE; ++TI)
+ insertValue(TI->second);
+}
+
+void SlotCalculator::processSymbolTableConstants(const SymbolTable *ST) {
+ for (SymbolTable::const_iterator I = ST->begin(), E = ST->end(); I != E; ++I)
+ for (SymbolTable::type_const_iterator TI = I->second.begin(),
+ TE = I->second.end(); TI != TE; ++TI)
+ if (isa<Constant>(TI->second))
+ insertValue(TI->second);
+}
+
+
+void SlotCalculator::incorporateFunction(const Function *M) {
assert(ModuleLevel.size() == 0 && "Module already incorporated!");
- // Save the Table state before we process the method...
- for (unsigned i = 0; i < Table.size(); ++i) {
+ SC_DEBUG("begin processFunction!\n");
+
+ // Save the Table state before we process the function...
+ for (unsigned i = 0; i < Table.size(); ++i)
ModuleLevel.push_back(Table[i].size());
+
+ SC_DEBUG("Inserting function arguments\n");
+
+ // Iterate over function arguments, adding them to the value table...
+ for(Function::const_aiterator I = M->abegin(), E = M->aend(); I != E; ++I)
+ insertValue(I);
+
+ // Iterate over all of the instructions in the function, looking for constant
+ // values that are referenced. Add these to the value pools before any
+ // nonconstant values. This will be turned into the constant pool for the
+ // bytecode writer.
+ //
+ if (!IgnoreNamedNodes) { // Assembly writer does not need this!
+ SC_DEBUG("Inserting function constants:\n";
+ for (constant_iterator I = constant_begin(M), E = constant_end(M);
+ I != E; ++I) {
+ cerr << " " << *I->getType()
+ << " " << *I << "\n";
+ });
+
+ // Emit all of the constants that are being used by the instructions in the
+ // function...
+ for_each(constant_begin(M), constant_end(M),
+ bind_obj(this, &SlotCalculator::insertValue));
+
+ // If there is a symbol table, it is possible that the user has names for
+ // constants that are not being used. In this case, we will have problems
+ // if we don't emit the constants now, because otherwise we will get
+ // symboltable references to constants not in the output. Scan for these
+ // constants now.
+ //
+ if (M->hasSymbolTable())
+ processSymbolTableConstants(M->getSymbolTable());
}
- // Process the method to incorporate its values into our table
- processMethod(M);
+ SC_DEBUG("Inserting Labels:\n");
+
+ // Iterate over basic blocks, adding them to the value table...
+ for (Function::const_iterator I = M->begin(), E = M->end(); I != E; ++I)
+ insertValue(I);
+ /* for_each(M->begin(), M->end(),
+ bind_obj(this, &SlotCalculator::insertValue));*/
+
+ SC_DEBUG("Inserting Instructions:\n");
+
+ // Add all of the instructions to the type planes...
+ for_each(inst_begin(M), inst_end(M),
+ bind_obj(this, &SlotCalculator::insertValue));
+
+ if (M->hasSymbolTable() && !IgnoreNamedNodes) {
+ SC_DEBUG("Inserting SymbolTable values:\n");
+ processSymbolTable(M->getSymbolTable());
+ }
+
+ SC_DEBUG("end processFunction!\n");
}
-void SlotCalculator::purgeMethod() {
+void SlotCalculator::purgeFunction() {
assert(ModuleLevel.size() != 0 && "Module not incorporated!");
unsigned NumModuleTypes = ModuleLevel.size();
+ SC_DEBUG("begin purgeFunction!\n");
+
// First, remove values from existing type planes
for (unsigned i = 0; i < NumModuleTypes; ++i) {
- unsigned ModuleSize = ModuleLevel[i]; // Size of plane before method came
- while (Table[i].size() != ModuleSize) {
- NodeMap.erase(NodeMap.find(Table[i].back())); // Erase from nodemap
- Table[i].pop_back(); // Shrink plane
+ unsigned ModuleSize = ModuleLevel[i]; // Size of plane before function came
+ TypePlane &CurPlane = Table[i];
+ //SC_DEBUG("Processing Plane " <<i<< " of size " << CurPlane.size() <<endl);
+
+ while (CurPlane.size() != ModuleSize) {
+ //SC_DEBUG(" Removing [" << i << "] Value=" << CurPlane.back() << "\n");
+ std::map<const Value *, unsigned>::iterator NI =
+ NodeMap.find(CurPlane.back());
+ assert(NI != NodeMap.end() && "Node not in nodemap?");
+ NodeMap.erase(NI); // Erase from nodemap
+ CurPlane.pop_back(); // Shrink plane
}
}
// We don't need this state anymore, free it up.
ModuleLevel.clear();
- // Next, remove any type planes defined by the method...
+ // Next, remove any type planes defined by the function...
while (NumModuleTypes != Table.size()) {
TypePlane &Plane = Table.back();
+ SC_DEBUG("Removing Plane " << (Table.size()-1) << " of size "
+ << Plane.size() << endl);
while (Plane.size()) {
NodeMap.erase(NodeMap.find(Plane.back())); // Erase from nodemap
Plane.pop_back(); // Shrink plane
Table.pop_back(); // Nuke the plane, we don't like it.
}
-}
-bool SlotCalculator::processConstant(const ConstPoolVal *CPV) {
- //cerr << "Inserting constant: '" << CPV->getStrValue() << endl;
- insertVal(CPV);
- return false;
+ SC_DEBUG("end purgeFunction!\n");
}
-// processType - This callback occurs when an derived type is discovered
-// at the class level. This activity occurs when processing a constant pool.
-//
-bool SlotCalculator::processType(const Type *Ty) {
- //cerr << "processType: " << Ty->getName() << endl;
- // TODO: Don't leak memory!!! Free this in the dtor!
- insertVal(new ConstPoolType(Ty));
- return false;
-}
-
-bool SlotCalculator::visitMethod(const Method *M) {
- //cerr << "visitMethod: '" << M->getType()->getName() << "'\n";
- insertVal(M);
- return false;
+int SlotCalculator::getValSlot(const Value *D) const {
+ std::map<const Value*, unsigned>::const_iterator I = NodeMap.find(D);
+ if (I == NodeMap.end()) return -1;
+
+ return (int)I->second;
}
-bool SlotCalculator::processMethodArgument(const MethodArgument *MA) {
- insertVal(MA);
- return false;
-}
-bool SlotCalculator::processBasicBlock(const BasicBlock *BB) {
- insertVal(BB);
- ModuleAnalyzer::processBasicBlock(BB); // Lets visit the instructions too!
- return false;
-}
+int SlotCalculator::insertValue(const Value *D) {
+ if (isa<Constant>(D) || isa<GlobalVariable>(D)) {
+ const User *U = cast<const User>(D);
+ // This makes sure that if a constant has uses (for example an array
+ // of const ints), that they are inserted also. Same for global variable
+ // initializers.
+ //
+ for(User::const_op_iterator I = U->op_begin(), E = U->op_end(); I != E; ++I)
+ if (!isa<GlobalValue>(*I)) // Don't chain insert global values
+ insertValue(*I);
+ }
-bool SlotCalculator::processInstruction(const Instruction *I) {
- insertVal(I);
- return false;
+ int SlotNo = getValSlot(D); // Check to see if it's already in!
+ if (SlotNo != -1) return SlotNo;
+ return insertVal(D);
}
-int SlotCalculator::getValSlot(const Value *D) const {
- map<const Value*, unsigned>::const_iterator I = NodeMap.find(D);
- if (I == NodeMap.end()) return -1;
-
- return (int)I->second;
-}
-void SlotCalculator::insertVal(const Value *D, bool dontIgnore = false) {
- if (D == 0) return;
+int SlotCalculator::insertVal(const Value *D, bool dontIgnore) {
+ assert(D && "Can't insert a null value!");
+ assert(getValSlot(D) == -1 && "Value is already in the table!");
// If this node does not contribute to a plane, or if the node has a
- // name and we don't want names, then ignore the silly node...
+ // name and we don't want names, then ignore the silly node... Note that types
+ // do need slot numbers so that we can keep track of where other values land.
//
if (!dontIgnore) // Don't ignore nonignorables!
if (D->getType() == Type::VoidTy || // Ignore void type nodes
- (IgnoreNamedNodes &&
- (D->hasName() || (D->isConstant() && !(D->getType() == Type::TypeTy)))))
- return;// If IgnoreNamed nodes, ignore if it's a constant or has a name
+ (IgnoreNamedNodes && // Ignore named and constants
+ (D->hasName() || isa<Constant>(D)) && !isa<Type>(D))) {
+ SC_DEBUG("ignored value " << D << endl);
+ return -1; // We do need types unconditionally though
+ }
+
+ // If it's a type, make sure that all subtypes of the type are included...
+ if (const Type *TheTy = dyn_cast<const Type>(D)) {
+
+ // Insert the current type before any subtypes. This is important because
+ // recursive types elements are inserted in a bottom up order. Changing
+ // this here can break things. For example:
+ //
+ // global { \2 * } { { \2 }* null }
+ //
+ int ResultSlot;
+ if ((ResultSlot = getValSlot(TheTy)) == -1) {
+ ResultSlot = doInsertVal(TheTy);
+ SC_DEBUG(" Inserted type: " << TheTy->getDescription() << " slot=" <<
+ ResultSlot << endl);
+ }
+
+ // Loop over any contained types in the definition... in reverse depth first
+ // order. This assures that all of the leafs of a type are output before
+ // the type itself is. This also assures us that we will not hit infinite
+ // recursion on recursive types...
+ //
+ for (df_iterator<const Type*> I = df_begin(TheTy, true),
+ E = df_end(TheTy); I != E; ++I)
+ if (*I != TheTy) {
+ // If we haven't seen this sub type before, add it to our type table!
+ const Type *SubTy = *I;
+ if (getValSlot(SubTy) == -1) {
+ SC_DEBUG(" Inserting subtype: " << SubTy->getDescription() << endl);
+ int Slot = doInsertVal(SubTy);
+ SC_DEBUG(" Inserted subtype: " << SubTy->getDescription() <<
+ " slot=" << Slot << endl);
+ }
+ }
+ return ResultSlot;
+ }
+
+ // Okay, everything is happy, actually insert the silly value now...
+ return doInsertVal(D);
+}
+
+// doInsertVal - This is a small helper function to be called only be insertVal.
+//
+int SlotCalculator::doInsertVal(const Value *D) {
const Type *Typ = D->getType();
unsigned Ty;
// Used for debugging DefSlot=-1 assertion...
//if (Typ == Type::TypeTy)
- // cerr << "Inserting type '" << D->castTypeAsserting()->getName() << "'!\n";
+ // cerr << "Inserting type '" << cast<Type>(D)->getDescription() << "'!\n";
if (Typ->isDerivedType()) {
int DefSlot = getValSlot(Typ);
if (DefSlot == -1) { // Have we already entered this type?
- // This can happen if a type is first seen in an instruction. For
- // example, if you say 'malloc uint', this defines a type 'uint*' that
- // may be undefined at this point.
- //
- cerr << "Type '" << Typ->getName() << "' unknown!\n";
- assert(0 && "Shouldn't type be in constant pool!?!?!");
- abort();
+ // Nope, this is the first we have seen the type, process it.
+ DefSlot = insertVal(Typ, true);
+ assert(DefSlot != -1 && "ProcessType returned -1 for a type?");
}
Ty = (unsigned)DefSlot;
} else {
Table.resize(Ty+1, TypePlane());
// Insert node into table and NodeMap...
- NodeMap[D] = Table[Ty].size();
-
- if (Typ == Type::TypeTy && !D->isType()) {
- // If it's a type constant, add the Type also
-
- // All Type instances should be constant types!
- const ConstPoolType *CPT = (const ConstPoolType*)D->castConstantAsserting();
- int Slot = getValSlot(CPT->getValue());
- if (Slot == -1) {
- // Only add if it's not already here!
- NodeMap[CPT->getValue()] = Table[Ty].size();
- } else if (!CPT->hasName()) { // If the type has no name...
- NodeMap[D] = (unsigned)Slot; // Don't readd type, merge.
- return;
- }
- }
+ unsigned DestSlot = NodeMap[D] = Table[Ty].size();
Table[Ty].push_back(D);
+
+ SC_DEBUG(" Inserting value [" << Ty << "] = " << D << " slot=" <<
+ DestSlot << " [");
+ // G = Global, C = Constant, T = Type, F = Function, o = other
+ SC_DEBUG((isa<GlobalVariable>(D) ? "G" : (isa<Constant>(D) ? "C" :
+ (isa<Type>(D) ? "T" : (isa<Function>(D) ? "F" : "o")))));
+ SC_DEBUG("]\n");
+ return (int)DestSlot;
}
projects / oota-llvm.git / blobdiff