mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-19 19:29:31 +00:00
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25170 91177308-0d34-0410-b5e6-96231b3b80d8
107 lines
3.6 KiB
C++
107 lines
3.6 KiB
C++
//===- FindUsedTypes.cpp - Find all Types used by a module ----------------===//
|
|
//
|
|
// 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 pass is used to seek out all of the types in use by the program. Note
|
|
// that this analysis explicitly does not include types only used by the symbol
|
|
// table.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/Analysis/FindUsedTypes.h"
|
|
#include "llvm/Constants.h"
|
|
#include "llvm/DerivedTypes.h"
|
|
#include "llvm/Module.h"
|
|
#include "llvm/Assembly/CachedWriter.h"
|
|
#include "llvm/Support/InstIterator.h"
|
|
using namespace llvm;
|
|
|
|
static RegisterAnalysis<FindUsedTypes>
|
|
X("printusedtypes", "Find Used Types");
|
|
|
|
// stub to help linkage
|
|
void FindUsedTypes::stub() {}
|
|
|
|
// IncorporateType - Incorporate one type and all of its subtypes into the
|
|
// collection of used types.
|
|
//
|
|
void FindUsedTypes::IncorporateType(const Type *Ty) {
|
|
// If ty doesn't already exist in the used types map, add it now, otherwise
|
|
// return.
|
|
if (!UsedTypes.insert(Ty).second) return; // Already contain Ty.
|
|
|
|
// Make sure to add any types this type references now.
|
|
//
|
|
for (Type::subtype_iterator I = Ty->subtype_begin(), E = Ty->subtype_end();
|
|
I != E; ++I)
|
|
IncorporateType(*I);
|
|
}
|
|
|
|
void FindUsedTypes::IncorporateValue(const Value *V) {
|
|
IncorporateType(V->getType());
|
|
|
|
// If this is a constant, it could be using other types...
|
|
if (const Constant *C = dyn_cast<Constant>(V)) {
|
|
if (!isa<GlobalValue>(C))
|
|
for (User::const_op_iterator OI = C->op_begin(), OE = C->op_end();
|
|
OI != OE; ++OI)
|
|
IncorporateValue(*OI);
|
|
}
|
|
}
|
|
|
|
|
|
// run - This incorporates all types used by the specified module
|
|
//
|
|
bool FindUsedTypes::runOnModule(Module &m) {
|
|
UsedTypes.clear(); // reset if run multiple times...
|
|
|
|
// Loop over global variables, incorporating their types
|
|
for (Module::const_global_iterator I = m.global_begin(), E = m.global_end(); I != E; ++I) {
|
|
IncorporateType(I->getType());
|
|
if (I->hasInitializer())
|
|
IncorporateValue(I->getInitializer());
|
|
}
|
|
|
|
for (Module::iterator MI = m.begin(), ME = m.end(); MI != ME; ++MI) {
|
|
IncorporateType(MI->getType());
|
|
const Function &F = *MI;
|
|
|
|
// Loop over all of the instructions in the function, adding their return
|
|
// type as well as the types of their operands.
|
|
//
|
|
for (const_inst_iterator II = inst_begin(F), IE = inst_end(F);
|
|
II != IE; ++II) {
|
|
const Instruction &I = *II;
|
|
|
|
IncorporateType(I.getType()); // Incorporate the type of the instruction
|
|
for (User::const_op_iterator OI = I.op_begin(), OE = I.op_end();
|
|
OI != OE; ++OI)
|
|
IncorporateValue(*OI); // Insert inst operand types as well
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
// Print the types found in the module. If the optional Module parameter is
|
|
// passed in, then the types are printed symbolically if possible, using the
|
|
// symbol table from the module.
|
|
//
|
|
void FindUsedTypes::print(std::ostream &o, const Module *M) const {
|
|
o << "Types in use by this module:\n";
|
|
if (M) {
|
|
CachedWriter CW(M, o);
|
|
for (std::set<const Type *>::const_iterator I = UsedTypes.begin(),
|
|
E = UsedTypes.end(); I != E; ++I)
|
|
CW << " " << **I << "\n";
|
|
} else
|
|
for (std::set<const Type *>::const_iterator I = UsedTypes.begin(),
|
|
E = UsedTypes.end(); I != E; ++I)
|
|
o << " " << **I << "\n";
|
|
}
|