1 //===-- iBranch.cpp - Implement the Branch instruction --------------------===//
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 Instruction *InsertBefore)
14 : TerminatorInst(Instruction::Br, InsertBefore) {
15 assert(True != 0 && "True branch destination may not be null!!!");
16 Operands.reserve(False ? 3 : 1);
17 Operands.push_back(Use(True, this));
19 Operands.push_back(Use(False, this));
20 Operands.push_back(Use(Cond, this));
23 assert(!!False == !!Cond &&
24 "Either both cond and false or neither can be specified!");
25 assert((Cond == 0 || Cond->getType() == Type::BoolTy) &&
26 "May only branch on boolean predicates!!!!");
29 BranchInst::BranchInst(BasicBlock *True, Instruction *InsertBefore)
30 : TerminatorInst(Instruction::Br, InsertBefore) {
31 assert(True != 0 && "True branch destination may not be null!!!");
33 Operands.push_back(Use(True, this));
36 BranchInst::BranchInst(const BranchInst &BI) : TerminatorInst(Instruction::Br) {
37 Operands.reserve(BI.Operands.size());
38 Operands.push_back(Use(BI.Operands[0], this));
39 if (BI.Operands.size() != 1) {
40 assert(BI.Operands.size() == 3 && "BR can have 1 or 3 operands!");
41 Operands.push_back(Use(BI.Operands[1], this));
42 Operands.push_back(Use(BI.Operands[2], this));