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//===-- InstrTypes.cpp - Implement Instruction subclasses --------*- C++ -*--=//
//
// This file implements
//
//===----------------------------------------------------------------------===//
#include "llvm/iOther.h"
#include "llvm/BasicBlock.h"
#include "llvm/Method.h"
#include "llvm/SymbolTable.h"
#include "llvm/Type.h"
#include <algorithm> // find
//===----------------------------------------------------------------------===//
// TerminatorInst Class
//===----------------------------------------------------------------------===//
TerminatorInst::TerminatorInst(unsigned iType)
: Instruction(Type::VoidTy, iType, "") {
}
//===----------------------------------------------------------------------===//
// MethodArgument Class
//===----------------------------------------------------------------------===//
// Specialize setName to take care of symbol table majik
void MethodArgument::setName(const string &name) {
Method *P;
if ((P = getParent()) && hasName()) P->getSymbolTable()->remove(this);
Value::setName(name);
if (P && hasName()) P->getSymbolTable()->insert(this);
}
//===----------------------------------------------------------------------===//
// PHINode Class
//===----------------------------------------------------------------------===//
PHINode::PHINode(const Type *Ty, const string &name)
: Instruction(Ty, Instruction::PHINode, name) {
}
PHINode::PHINode(const PHINode &PN)
: Instruction(PN.getType(), Instruction::PHINode) {
Operands.reserve(PN.Operands.size());
for (unsigned i = 0; i < PN.Operands.size(); i+=2) {
Operands.push_back(Use(PN.Operands[i], this));
Operands.push_back(Use(PN.Operands[i+1], this));
}
}
void PHINode::addIncoming(Value *D, BasicBlock *BB) {
Operands.push_back(Use(D, this));
Operands.push_back(Use(BB, this));
}
// removeIncomingValue - Remove an incoming value. This is useful if a
// predecessor basic block is deleted.
Value *PHINode::removeIncomingValue(const BasicBlock *BB) {
op_iterator Idx = find(Operands.begin(), Operands.end(), (const Value*)BB);
assert(Idx != Operands.end() && "BB not in PHI node!");
--Idx; // Back up to value prior to Basic block
Value *Removed = *Idx;
Operands.erase(Idx, Idx+2); // Erase Value and BasicBlock
return Removed;
}
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