-//===-- SlotCalculator.cpp - Calculate what slots values land in ------------=//
+//===-- SlotCalculator.cpp - Calculate what slots values land in ----------===//
+//
+// 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 a useful analysis step to figure out what numbered
// slots values in a program will land in (keeping track of per plane
#include "llvm/Constant.h"
#include "llvm/DerivedTypes.h"
#include "llvm/SymbolTable.h"
-#include "Support/DepthFirstIterator.h"
+#include "Support/PostOrderIterator.h"
#include "Support/STLExtras.h"
#include <algorithm>
+using namespace llvm;
#if 0
-#define SC_DEBUG(X) cerr << X
+#define SC_DEBUG(X) std::cerr << X
#else
#define SC_DEBUG(X)
#endif
// Preload table... Make sure that all of the primitive types are in the table
// and that their Primitive ID is equal to their slot #
//
+ SC_DEBUG("Inserting primitive types:\n");
for (unsigned i = 0; i < Type::FirstDerivedTyID; ++i) {
assert(Type::getPrimitiveType((Type::PrimitiveID)i));
- insertVal(Type::getPrimitiveType((Type::PrimitiveID)i), true);
+ insertValue(Type::getPrimitiveType((Type::PrimitiveID)i), true);
}
if (M == 0) return; // Empty table...
// Preload table... Make sure that all of the primitive types are in the table
// and that their Primitive ID is equal to their slot #
//
+ SC_DEBUG("Inserting primitive types:\n");
for (unsigned i = 0; i < Type::FirstDerivedTyID; ++i) {
assert(Type::getPrimitiveType((Type::PrimitiveID)i));
- insertVal(Type::getPrimitiveType((Type::PrimitiveID)i), true);
+ insertValue(Type::getPrimitiveType((Type::PrimitiveID)i), true);
}
if (TheModule == 0) return; // Empty table...
void SlotCalculator::processModule() {
SC_DEBUG("begin processModule!\n");
- // Add all of the constants that the global variables might refer to first.
+ // Add all of the global variables to the value table...
//
for (Module::const_giterator I = TheModule->gbegin(), E = TheModule->gend();
I != E; ++I)
- if (I->hasInitializer())
- insertValue(I->getInitializer());
-
- // 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);
+ getOrCreateSlot(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);
+ for (Module::const_iterator I = TheModule->begin(), E = TheModule->end();
+ I != E; ++I)
+ getOrCreateSlot(I);
+
+ // Add all of the module level constants used as initializers
+ //
+ for (Module::const_giterator I = TheModule->gbegin(), E = TheModule->gend();
+ I != E; ++I)
+ if (I->hasInitializer())
+ getOrCreateSlot(I->getInitializer());
// 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) {
+ if (!IgnoreNamedNodes) {
SC_DEBUG("Inserting SymbolTable values:\n");
- processSymbolTable(TheModule->getSymbolTable());
+ processSymbolTable(&TheModule->getSymbolTable());
}
SC_DEBUG("end processModule!\n");
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);
+ getOrCreateSlot(TI->second);
}
void SlotCalculator::processSymbolTableConstants(const SymbolTable *ST) {
for (SymbolTable::type_const_iterator TI = I->second.begin(),
TE = I->second.end(); TI != TE; ++TI)
if (isa<Constant>(TI->second))
- insertValue(TI->second);
+ getOrCreateSlot(TI->second);
}
-void SlotCalculator::incorporateFunction(const Function *M) {
+void SlotCalculator::incorporateFunction(const Function *F) {
assert(ModuleLevel.size() == 0 && "Module already incorporated!");
SC_DEBUG("begin processFunction!\n");
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);
+ for(Function::const_aiterator I = F->abegin(), E = F->aend(); I != E; ++I)
+ getOrCreateSlot(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
//
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);
+ for (constant_iterator I = constant_begin(F), E = constant_end(F);
I != E; ++I) {
- cerr << " " << *I->getType()
- << " " << *I << "\n";
+ std::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));
+ for_each(constant_begin(F), constant_end(F),
+ bind_obj(this, &SlotCalculator::getOrCreateSlot));
// 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
// symboltable references to constants not in the output. Scan for these
// constants now.
//
- if (M->hasSymbolTable())
- processSymbolTableConstants(M->getSymbolTable());
+ processSymbolTableConstants(&F->getSymbolTable());
}
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));*/
+ for (Function::const_iterator I = F->begin(), E = F->end(); I != E; ++I)
+ getOrCreateSlot(I);
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));
+ for (Function::const_iterator BB = F->begin(), E = F->end(); BB != E; ++BB)
+ for (BasicBlock::const_iterator I = BB->begin(), E = BB->end(); I!=E; ++I) {
+ getOrCreateSlot(I);
+ if (const VANextInst *VAN = dyn_cast<VANextInst>(I))
+ getOrCreateSlot(VAN->getArgType());
+ }
- if (M->hasSymbolTable() && !IgnoreNamedNodes) {
+ if (!IgnoreNamedNodes) {
SC_DEBUG("Inserting SymbolTable values:\n");
- processSymbolTable(M->getSymbolTable());
+ processSymbolTable(&F->getSymbolTable());
}
SC_DEBUG("end processFunction!\n");
SC_DEBUG("end purgeFunction!\n");
}
-int SlotCalculator::getValSlot(const Value *D) const {
+int SlotCalculator::getSlot(const Value *D) const {
std::map<const Value*, unsigned>::const_iterator I = NodeMap.find(D);
if (I == NodeMap.end()) return -1;
}
-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);
- }
-
- int SlotNo = getValSlot(D); // Check to see if it's already in!
+int SlotCalculator::getOrCreateSlot(const Value *V) {
+ int SlotNo = getSlot(V); // Check to see if it's already in!
if (SlotNo != -1) return SlotNo;
- return insertVal(D);
+
+ if (!isa<GlobalValue>(V))
+ if (const Constant *C = dyn_cast<Constant>(V)) {
+ // This makes sure that if a constant has uses (for example an array of
+ // const ints), that they are inserted also.
+ //
+ for (User::const_op_iterator I = C->op_begin(), E = C->op_end();
+ I != E; ++I)
+ getOrCreateSlot(*I);
+ }
+
+ return insertValue(V);
}
-int SlotCalculator::insertVal(const Value *D, bool dontIgnore) {
+int SlotCalculator::insertValue(const Value *D, bool dontIgnore) {
assert(D && "Can't insert a null value!");
- assert(getValSlot(D) == -1 && "Value is already in the table!");
+ assert(getSlot(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... Note that types
if (D->getType() == Type::VoidTy || // Ignore void type nodes
(IgnoreNamedNodes && // Ignore named and constants
(D->hasName() || isa<Constant>(D)) && !isa<Type>(D))) {
- SC_DEBUG("ignored value " << D << "\n");
+ SC_DEBUG("ignored value " << *D << "\n");
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)) {
+ if (const Type *TheTy = dyn_cast<Type>(D)) {
// Insert the current type before any subtypes. This is important because
// recursive types elements are inserted in a bottom up order. Changing
//
// global { \2 * } { { \2 }* null }
//
- int ResultSlot;
- if ((ResultSlot = getValSlot(TheTy)) == -1) {
- ResultSlot = doInsertVal(TheTy);
- SC_DEBUG(" Inserted type: " << TheTy->getDescription() << " slot=" <<
- ResultSlot << "\n");
- }
+ int ResultSlot = doInsertValue(TheTy);
+ SC_DEBUG(" Inserted type: " << TheTy->getDescription() << " slot=" <<
+ ResultSlot << "\n");
- // 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...
+ // Loop over any contained types in the definition... in post
+ // order.
//
- for (df_iterator<const Type*> I = df_begin(TheTy, true),
- E = df_end(TheTy); I != E; ++I)
+ for (po_iterator<const Type*> I = po_begin(TheTy), E = po_end(TheTy);
+ I != E; ++I) {
if (*I != TheTy) {
+ const Type *SubTy = *I;
// 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() << "\n");
- int Slot = doInsertVal(SubTy);
- SC_DEBUG(" Inserted subtype: " << SubTy->getDescription() <<
- " slot=" << Slot << "\n");
- }
+ if (getSlot(SubTy) == -1) {
+ SC_DEBUG(" Inserting subtype: " << SubTy->getDescription() << "\n");
+ int Slot = doInsertValue(SubTy);
+ SC_DEBUG(" Inserted subtype: " << SubTy->getDescription() <<
+ " slot=" << Slot << "\n");
+ }
}
+ }
return ResultSlot;
}
// Okay, everything is happy, actually insert the silly value now...
- return doInsertVal(D);
+ return doInsertValue(D);
}
-// doInsertVal - This is a small helper function to be called only be insertVal.
+// doInsertValue - This is a small helper function to be called only
+// be insertValue.
//
-int SlotCalculator::doInsertVal(const Value *D) {
+int SlotCalculator::doInsertValue(const Value *D) {
const Type *Typ = D->getType();
unsigned Ty;
// cerr << "Inserting type '" << cast<Type>(D)->getDescription() << "'!\n";
if (Typ->isDerivedType()) {
- int DefSlot = getValSlot(Typ);
- if (DefSlot == -1) { // Have we already entered this type?
+ int ValSlot = getSlot(Typ);
+ if (ValSlot == -1) { // Have we already entered this type?
// 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?");
+ ValSlot = insertValue(Typ, true);
+ assert(ValSlot != -1 && "ProcessType returned -1 for a type?");
}
- Ty = (unsigned)DefSlot;
+ Ty = (unsigned)ValSlot;
} else {
Ty = Typ->getPrimitiveID();
}
if (Table.size() <= Ty) // Make sure we have the type plane allocated...
Table.resize(Ty+1, TypePlane());
-
+
+ // If this is the first value to get inserted into the type plane, make sure
+ // to insert the implicit null value...
+ if (Table[Ty].empty() && Ty >= Type::FirstDerivedTyID && !IgnoreNamedNodes) {
+ Value *ZeroInitializer = Constant::getNullValue(Typ);
+
+ // If we are pushing zeroinit, it will be handled below.
+ if (D != ZeroInitializer) {
+ Table[Ty].push_back(ZeroInitializer);
+ NodeMap[ZeroInitializer] = 0;
+ }
+ }
+
// Insert node into table and NodeMap...
unsigned DestSlot = NodeMap[D] = Table[Ty].size();
Table[Ty].push_back(D);
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