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https://github.com/c64scene-ar/llvm-6502.git
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4f1bd9e996
1. Fix the macros in IncludeFile.h to put everything in the llvm namespace 2. Replace the previous explicit mechanism in all the .h and .cpp files with the macros in IncludeFile.h This gets us a consistent mechanism throughout LLVM for ensuring linkage. Next step is to make sure its used in enough places. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28715 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 ----------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by the LLVM research group and is distributed under
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// the University of Illinois Open Source 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/Constants.h"
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#include "llvm/DerivedTypes.h"
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#include "llvm/Module.h"
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#include "llvm/Assembly/CachedWriter.h"
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#include "llvm/Support/InstIterator.h"
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using namespace llvm;
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static RegisterAnalysis<FindUsedTypes>
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X("printusedtypes", "Find Used Types");
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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(const 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).second) 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(); 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(std::ostream &o, const Module *M) const {
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o << "Types in use by this module:\n";
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if (M) {
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CachedWriter CW(M, o);
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for (std::set<const Type *>::const_iterator I = UsedTypes.begin(),
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E = UsedTypes.end(); I != E; ++I)
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CW << " " << **I << "\n";
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} else
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for (std::set<const Type *>::const_iterator I = UsedTypes.begin(),
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E = UsedTypes.end(); I != E; ++I)
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o << " " << **I << "\n";
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}
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// Ensure that this file gets linked in when FindUsedTypes.h is used.
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DEFINING_FILE_FOR(FindUsedTypes)
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