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876ac60880
business. This header includes Function and BasicBlock and directly uses the interfaces of both classes. It has to do with the IR, it even has that in the name. =] Put it in the library it belongs to. This is one step toward making LLVM's Support library survive a C++ modules bootstrap. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@202814 91177308-0d34-0410-b5e6-96231b3b80d8
101 lines
3.3 KiB
C++
101 lines
3.3 KiB
C++
//===- FindUsedTypes.cpp - Find all Types used by a module ----------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This pass is used to seek out all of the types in use by the program. Note
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// that this analysis explicitly does not include types only used by the symbol
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// table.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Analysis/FindUsedTypes.h"
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#include "llvm/IR/Constants.h"
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#include "llvm/IR/DerivedTypes.h"
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#include "llvm/IR/InstIterator.h"
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#include "llvm/IR/Module.h"
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#include "llvm/Support/raw_ostream.h"
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using namespace llvm;
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char FindUsedTypes::ID = 0;
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INITIALIZE_PASS(FindUsedTypes, "print-used-types",
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"Find Used Types", false, true)
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// IncorporateType - Incorporate one type and all of its subtypes into the
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// collection of used types.
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//
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void FindUsedTypes::IncorporateType(Type *Ty) {
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// If ty doesn't already exist in the used types map, add it now, otherwise
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// return.
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if (!UsedTypes.insert(Ty)) return; // Already contain Ty.
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// Make sure to add any types this type references now.
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//
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for (Type::subtype_iterator I = Ty->subtype_begin(), E = Ty->subtype_end();
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I != E; ++I)
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IncorporateType(*I);
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}
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void FindUsedTypes::IncorporateValue(const Value *V) {
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IncorporateType(V->getType());
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// If this is a constant, it could be using other types...
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if (const Constant *C = dyn_cast<Constant>(V)) {
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if (!isa<GlobalValue>(C))
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for (User::const_op_iterator OI = C->op_begin(), OE = C->op_end();
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OI != OE; ++OI)
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IncorporateValue(*OI);
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}
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}
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// run - This incorporates all types used by the specified module
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//
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bool FindUsedTypes::runOnModule(Module &m) {
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UsedTypes.clear(); // reset if run multiple times...
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// Loop over global variables, incorporating their types
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for (Module::const_global_iterator I = m.global_begin(), E = m.global_end();
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I != E; ++I) {
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IncorporateType(I->getType());
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if (I->hasInitializer())
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IncorporateValue(I->getInitializer());
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}
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for (Module::iterator MI = m.begin(), ME = m.end(); MI != ME; ++MI) {
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IncorporateType(MI->getType());
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const Function &F = *MI;
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// Loop over all of the instructions in the function, adding their return
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// type as well as the types of their operands.
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//
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for (const_inst_iterator II = inst_begin(F), IE = inst_end(F);
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II != IE; ++II) {
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const Instruction &I = *II;
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IncorporateType(I.getType()); // Incorporate the type of the instruction
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for (User::const_op_iterator OI = I.op_begin(), OE = I.op_end();
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OI != OE; ++OI)
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IncorporateValue(*OI); // Insert inst operand types as well
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}
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}
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return false;
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}
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// Print the types found in the module. If the optional Module parameter is
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// passed in, then the types are printed symbolically if possible, using the
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// symbol table from the module.
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//
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void FindUsedTypes::print(raw_ostream &OS, const Module *M) const {
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OS << "Types in use by this module:\n";
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for (SetVector<Type *>::const_iterator I = UsedTypes.begin(),
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E = UsedTypes.end(); I != E; ++I) {
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OS << " " << **I << '\n';
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}
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}
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