mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2025-10-30 16:17:05 +00:00
62815d9672
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3676 91177308-0d34-0410-b5e6-96231b3b80d8
45 lines
1.6 KiB
C++
45 lines
1.6 KiB
C++
//===-- iBranch.cpp - Implement the Branch instruction -----------*- C++ -*--=//
|
|
//
|
|
// 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"
|
|
|
|
BranchInst::BranchInst(BasicBlock *True, BasicBlock *False, Value *Cond,
|
|
Instruction *InsertBefore)
|
|
: TerminatorInst(Instruction::Br, InsertBefore) {
|
|
assert(True != 0 && "True branch destination may not be null!!!");
|
|
Operands.reserve(False ? 3 : 1);
|
|
Operands.push_back(Use(True, this));
|
|
if (False) {
|
|
Operands.push_back(Use(False, this));
|
|
Operands.push_back(Use(Cond, this));
|
|
}
|
|
|
|
assert(!!False == !!Cond &&
|
|
"Either both cond and false or neither can be specified!");
|
|
assert((Cond == 0 || Cond->getType() == Type::BoolTy) &&
|
|
"May only branch on boolean predicates!!!!");
|
|
}
|
|
|
|
BranchInst::BranchInst(BasicBlock *True, Instruction *InsertBefore)
|
|
: TerminatorInst(Instruction::Br, InsertBefore) {
|
|
assert(True != 0 && "True branch destination may not be null!!!");
|
|
Operands.reserve(1);
|
|
Operands.push_back(Use(True, 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));
|
|
}
|
|
}
|