mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-13 20:32:21 +00:00
f6e8cb4954
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13797 91177308-0d34-0410-b5e6-96231b3b80d8
59 lines
2.0 KiB
C++
59 lines
2.0 KiB
C++
//===-- iBranch.cpp - Implement the Branch instruction --------------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file was developed by the LLVM research group and is distributed under
|
|
// the University of Illinois Open Source License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file implements the 'br' instruction, which can represent either a
|
|
// conditional or unconditional branch.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/iTerminators.h"
|
|
#include "llvm/BasicBlock.h"
|
|
#include "llvm/Type.h"
|
|
using namespace llvm;
|
|
|
|
// Out-of-line ReturnInst method, put here so the C++ compiler can choose to
|
|
// emit the vtable for the class in this translation unit.
|
|
void ReturnInst::setSuccessor(unsigned idx, BasicBlock *NewSucc) {
|
|
assert(0 && "ReturnInst has no successors!");
|
|
}
|
|
|
|
// Likewise for UnwindInst
|
|
void UnwindInst::setSuccessor(unsigned idx, BasicBlock *NewSucc) {
|
|
assert(0 && "UnwindInst has no successors!");
|
|
}
|
|
|
|
void BranchInst::init(BasicBlock *IfTrue)
|
|
{
|
|
assert(IfTrue != 0 && "Branch destination may not be null!");
|
|
Operands.reserve(1);
|
|
Operands.push_back(Use(IfTrue, this));
|
|
}
|
|
|
|
void BranchInst::init(BasicBlock *IfTrue, BasicBlock *IfFalse, Value *Cond)
|
|
{
|
|
assert(IfTrue && IfFalse && Cond &&
|
|
"Branch destinations and condition may not be null!");
|
|
assert(Cond && Cond->getType() == Type::BoolTy &&
|
|
"May only branch on boolean predicates!");
|
|
Operands.reserve(3);
|
|
Operands.push_back(Use(IfTrue, this));
|
|
Operands.push_back(Use(IfFalse, this));
|
|
Operands.push_back(Use(Cond, this));
|
|
}
|
|
|
|
BranchInst::BranchInst(const BranchInst &BI) : TerminatorInst(Instruction::Br) {
|
|
Operands.reserve(BI.Operands.size());
|
|
Operands.push_back(Use(BI.Operands[0], this));
|
|
if (BI.Operands.size() != 1) {
|
|
assert(BI.Operands.size() == 3 && "BR can have 1 or 3 operands!");
|
|
Operands.push_back(Use(BI.Operands[1], this));
|
|
Operands.push_back(Use(BI.Operands[2], this));
|
|
}
|
|
}
|