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//===- SPIRVBasicBlock.h - SPIR-V Basic Block -------------------*- C++ -*-===//
//
// The LLVM/SPIRV Translator
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
// Copyright (c) 2014 Advanced Micro Devices, Inc. All rights reserved.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the "Software"),
// to deal with the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following conditions:
//
// Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimers.
// Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimers in the documentation
// and/or other materials provided with the distribution.
// Neither the names of Advanced Micro Devices, Inc., nor the names of its
// contributors may be used to endorse or promote products derived from this
// Software without specific prior written permission.
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// CONTRIBUTORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS WITH
// THE SOFTWARE.
//
//===----------------------------------------------------------------------===//
/// \file
///
/// This file defines Basic Block class for SPIR-V.
///
//===----------------------------------------------------------------------===//
#ifndef SPIRV_LIBSPIRV_SPIRVBASICBLOCK_H
#define SPIRV_LIBSPIRV_SPIRVBASICBLOCK_H
#include "SPIRVValue.h"
#include <algorithm>
namespace SPIRV {
class SPIRVFunction;
class SPIRVInstruction;
class SPIRVDecoder;
class SPIRVBasicBlock : public SPIRVValue {
public:
SPIRVBasicBlock(SPIRVId TheId, SPIRVFunction *Func);
SPIRVBasicBlock() : SPIRVValue(OpLabel), ParentF(NULL) { setAttr(); }
SPIRVDecoder getDecoder(std::istream &IS) override;
SPIRVFunction *getParent() const { return ParentF; }
size_t getNumInst() const { return InstVec.size(); }
SPIRVInstruction *getInst(size_t I) const { return InstVec[I]; }
SPIRVInstruction *getPrevious(const SPIRVInstruction *I) const {
auto Loc = find(I);
if (Loc == InstVec.end() || Loc == InstVec.begin())
return nullptr;
return *(--Loc);
}
SPIRVInstruction *getNext(const SPIRVInstruction *I) const {
auto Loc = find(I);
if (Loc == InstVec.end())
return nullptr;
++Loc;
if (Loc == InstVec.end())
return nullptr;
return *Loc;
}
// Return the last instruction in the BB or nullptr if the BB is empty.
const SPIRVInstruction *getTerminateInstr() const {
return InstVec.empty() ? nullptr : InstVec.back();
}
// OpVariable instructions must be the first instructions in the block,
// intermixed with OpLine and OpNoLine instructions. Return first instruction
// not being an OpVariable, OpLine or OpNoLine.
SPIRVInstruction *getVariableInsertionPoint() const;
void setScope(SPIRVEntry *Scope) override;
void setParent(SPIRVFunction *F) { ParentF = F; }
SPIRVInstruction *
addInstruction(SPIRVInstruction *I,
const SPIRVInstruction *InsertBefore = nullptr);
void eraseInstruction(const SPIRVInstruction *I) {
auto Loc = find(I);
assert(Loc != InstVec.end());
InstVec.erase(Loc);
}
void setAttr() { setHasNoType(); }
_SPIRV_DCL_ENCDEC
void encodeChildren(spv_ostream &) const override;
void validate() const override {
SPIRVValue::validate();
assert(ParentF && "Invalid parent function");
}
private:
SPIRVFunction *ParentF;
typedef std::vector<SPIRVInstruction *> SPIRVInstructionVector;
SPIRVInstructionVector InstVec;
SPIRVInstructionVector::const_iterator
find(const SPIRVInstruction *Inst) const {
return std::find(InstVec.begin(), InstVec.end(), Inst);
}
SPIRVInstructionVector::iterator find(const SPIRVInstruction *Inst) {
return std::find(InstVec.begin(), InstVec.end(), Inst);
}
};
typedef SPIRVBasicBlock SPIRVLabel;
} // namespace SPIRV
#endif // SPIRV_LIBSPIRV_SPIRVBASICBLOCK_H
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