1 //===-- iBranch.cpp - Implement the Branch instruction -----------*- C++ -*--=//
3 // This file implements the 'br' instruction, which can represent either a
4 // conditional or unconditional branch.
6 //===----------------------------------------------------------------------===//
8 #include "llvm/iTerminators.h"
9 #include "llvm/BasicBlock.h"
10 #include "llvm/Type.h"
12 BranchInst::BranchInst(BasicBlock *True, BasicBlock *False, Value *Cond)
13 : TerminatorInst(Instruction::Br) {
14 assert(True != 0 && "True branch destination may not be null!!!");
15 Operands.reserve(False ? 3 : 1);
16 Operands.push_back(Use(True, this));
18 Operands.push_back(Use(False, this));
19 Operands.push_back(Use(Cond, this));
22 assert(!!False == !!Cond &&
23 "Either both cond and false or neither can be specified!");
24 assert((Cond == 0 || Cond->getType() == Type::BoolTy) &&
25 "May only branch on boolean predicates!!!!");
28 BranchInst::BranchInst(const BranchInst &BI) : TerminatorInst(Instruction::Br) {
29 Operands.reserve(BI.Operands.size());
30 Operands.push_back(Use(BI.Operands[0], this));
31 if (BI.Operands.size() != 1) {
32 assert(BI.Operands.size() == 3 && "BR can have 1 or 3 operands!");
33 Operands.push_back(Use(BI.Operands[1], this));
34 Operands.push_back(Use(BI.Operands[2], this));