llvm-6502/lib/IR/TypeFinder.cpp
Duncan P. N. Exon Smith 5bf8ade9d0 Revert "IR: MDNode => Value"
Instead, we're going to separate metadata from the Value hierarchy.  See
PR21532.

This reverts commit r221375.
This reverts commit r221373.
This reverts commit r221359.
This reverts commit r221167.
This reverts commit r221027.
This reverts commit r221024.
This reverts commit r221023.
This reverts commit r220995.
This reverts commit r220994.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@221711 91177308-0d34-0410-b5e6-96231b3b80d8
2014-11-11 21:30:22 +00:00

160 lines
5.1 KiB
C++

//===-- TypeFinder.cpp - Implement the TypeFinder class -------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements the TypeFinder class for the IR library.
//
//===----------------------------------------------------------------------===//
#include "llvm/IR/TypeFinder.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/IR/BasicBlock.h"
#include "llvm/IR/DerivedTypes.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/Metadata.h"
#include "llvm/IR/Module.h"
using namespace llvm;
void TypeFinder::run(const Module &M, bool onlyNamed) {
OnlyNamed = onlyNamed;
// Get types from global variables.
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());
}
// Get types from aliases.
for (Module::const_alias_iterator I = M.alias_begin(),
E = M.alias_end(); I != E; ++I) {
incorporateType(I->getType());
if (const Value *Aliasee = I->getAliasee())
incorporateValue(Aliasee);
}
// Get types from functions.
SmallVector<std::pair<unsigned, MDNode *>, 4> MDForInst;
for (Module::const_iterator FI = M.begin(), E = M.end(); FI != E; ++FI) {
incorporateType(FI->getType());
if (FI->hasPrefixData())
incorporateValue(FI->getPrefixData());
// First incorporate the arguments.
for (Function::const_arg_iterator AI = FI->arg_begin(),
AE = FI->arg_end(); AI != AE; ++AI)
incorporateValue(AI);
for (Function::const_iterator BB = FI->begin(), E = FI->end();
BB != E;++BB)
for (BasicBlock::const_iterator II = BB->begin(),
E = BB->end(); II != E; ++II) {
const Instruction &I = *II;
// Incorporate the type of the instruction.
incorporateType(I.getType());
// Incorporate non-instruction operand types. (We are incorporating all
// instructions with this loop.)
for (User::const_op_iterator OI = I.op_begin(), OE = I.op_end();
OI != OE; ++OI)
if (!isa<Instruction>(OI))
incorporateValue(*OI);
// Incorporate types hiding in metadata.
I.getAllMetadataOtherThanDebugLoc(MDForInst);
for (unsigned i = 0, e = MDForInst.size(); i != e; ++i)
incorporateMDNode(MDForInst[i].second);
MDForInst.clear();
}
}
for (Module::const_named_metadata_iterator I = M.named_metadata_begin(),
E = M.named_metadata_end(); I != E; ++I) {
const NamedMDNode *NMD = I;
for (unsigned i = 0, e = NMD->getNumOperands(); i != e; ++i)
incorporateMDNode(NMD->getOperand(i));
}
}
void TypeFinder::clear() {
VisitedConstants.clear();
VisitedTypes.clear();
StructTypes.clear();
}
/// incorporateType - This method adds the type to the list of used structures
/// if it's not in there already.
void TypeFinder::incorporateType(Type *Ty) {
// Check to see if we've already visited this type.
if (!VisitedTypes.insert(Ty).second)
return;
SmallVector<Type *, 4> TypeWorklist;
TypeWorklist.push_back(Ty);
do {
Ty = TypeWorklist.pop_back_val();
// If this is a structure or opaque type, add a name for the type.
if (StructType *STy = dyn_cast<StructType>(Ty))
if (!OnlyNamed || STy->hasName())
StructTypes.push_back(STy);
// Add all unvisited subtypes to worklist for processing
for (Type::subtype_reverse_iterator I = Ty->subtype_rbegin(),
E = Ty->subtype_rend();
I != E; ++I)
if (VisitedTypes.insert(*I).second)
TypeWorklist.push_back(*I);
} while (!TypeWorklist.empty());
}
/// incorporateValue - This method is used to walk operand lists finding types
/// hiding in constant expressions and other operands that won't be walked in
/// other ways. GlobalValues, basic blocks, instructions, and inst operands are
/// all explicitly enumerated.
void TypeFinder::incorporateValue(const Value *V) {
if (const MDNode *M = dyn_cast<MDNode>(V))
return incorporateMDNode(M);
if (!isa<Constant>(V) || isa<GlobalValue>(V)) return;
// Already visited?
if (!VisitedConstants.insert(V).second)
return;
// Check this type.
incorporateType(V->getType());
// If this is an instruction, we incorporate it separately.
if (isa<Instruction>(V))
return;
// Look in operands for types.
const User *U = cast<User>(V);
for (Constant::const_op_iterator I = U->op_begin(),
E = U->op_end(); I != E;++I)
incorporateValue(*I);
}
/// incorporateMDNode - This method is used to walk the operands of an MDNode to
/// find types hiding within.
void TypeFinder::incorporateMDNode(const MDNode *V) {
// Already visited?
if (!VisitedConstants.insert(V).second)
return;
// Look in operands for types.
for (unsigned i = 0, e = V->getNumOperands(); i != e; ++i)
if (Value *Op = V->getOperand(i))
incorporateValue(Op);
}