lib/VMCore/InstrTypes.cpp

   1 //===-- InstrTypes.cpp - Implement Instruction subclasses --------*- C++ -*--=//
   2 //
   3 // This file implements
   4 //
   5 //===----------------------------------------------------------------------===//
   6
   7 #include "llvm/iOther.h"
   8 #include "llvm/BasicBlock.h"
   9 #include "llvm/Method.h"
  10 #include "llvm/SymbolTable.h"
  11 #include "llvm/Type.h"
  12 #include <algorithm>  // find
  13
  14 // TODO: Move to getUnaryOperator iUnary.cpp when and if it exists!
  15 UnaryOperator *UnaryOperator::create(UnaryOps Op, Value *Source) {
  16   switch (Op) {
  17   default:
  18     cerr << "Don't know how to GetUnaryOperator " << Op << endl;
  19     return 0;
  20   }
  21 }
  22
  23 //===----------------------------------------------------------------------===//
  24 //                            TerminatorInst Class
  25 //===----------------------------------------------------------------------===//
  26
  27 TerminatorInst::TerminatorInst(unsigned iType)
  28   : Instruction(Type::VoidTy, iType, "") {
  29 }
  30
  31
  32 //===----------------------------------------------------------------------===//
  33 //                            MethodArgument Class
  34 //===----------------------------------------------------------------------===//
  35
  36 // Specialize setName to take care of symbol table majik
  37 void MethodArgument::setName(const string &name) {
  38   Method *P;
  39   if ((P = getParent()) && hasName()) P->getSymbolTable()->remove(this);
  40   Value::setName(name);
  41   if (P && hasName()) P->getSymbolTable()->insert(this);
  42 }
  43
  44
  45 //===----------------------------------------------------------------------===//
  46 //                               PHINode Class
  47 //===----------------------------------------------------------------------===//
  48
  49 PHINode::PHINode(const Type *Ty, const string &name)
  50   : Instruction(Ty, Instruction::PHINode, name) {
  51 }
  52
  53 PHINode::PHINode(const PHINode &PN)
  54   : Instruction(PN.getType(), Instruction::PHINode) {
  55   Operands.reserve(PN.Operands.size());
  56   for (unsigned i = 0; i < PN.Operands.size(); i+=2) {
  57     Operands.push_back(Use(PN.Operands[i], this));
  58     Operands.push_back(Use(PN.Operands[i+1], this));
  59   }
  60 }
  61
  62 void PHINode::addIncoming(Value *D, BasicBlock *BB) {
  63   Operands.push_back(Use(D, this));
  64   Operands.push_back(Use(BB, this));
  65 }
  66
  67 // removeIncomingValue - Remove an incoming value.  This is useful if a
  68 // predecessor basic block is deleted.
  69 Value *PHINode::removeIncomingValue(const BasicBlock *BB) {
  70   op_iterator Idx = find(Operands.begin(), Operands.end(), (const Value*)BB);
  71   assert(Idx != Operands.end() && "BB not in PHI node!");
  72   --Idx;  // Back up to value prior to Basic block
  73   Value *Removed = *Idx;
  74   Operands.erase(Idx, Idx+2);  // Erase Value and BasicBlock
  75   return Removed;
  76 }