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godot/thirdparty/glslang/SPIRV/SPVRemapper.h

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//
// Copyright (C) 2015 LunarG, Inc.
//
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
//
// Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//
// Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following
// disclaimer in the documentation and/or other materials provided
// with the distribution.
//
// Neither the name of 3Dlabs Inc. Ltd. nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
// COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
//
#ifndef SPIRVREMAPPER_H
#define SPIRVREMAPPER_H
#include <string>
#include <vector>
#include <cstdlib>
#include <exception>
namespace spv {
// MSVC defines __cplusplus as an older value, even when it supports almost all of 11.
// We handle that here by making our own symbol.
#if __cplusplus >= 201103L || (defined(_MSC_VER) && _MSC_VER >= 1700)
# define use_cpp11 1
#endif
class spirvbin_base_t
{
public:
enum Options {
NONE = 0,
STRIP = (1<<0),
MAP_TYPES = (1<<1),
MAP_NAMES = (1<<2),
MAP_FUNCS = (1<<3),
DCE_FUNCS = (1<<4),
DCE_VARS = (1<<5),
DCE_TYPES = (1<<6),
OPT_LOADSTORE = (1<<7),
OPT_FWD_LS = (1<<8), // EXPERIMENTAL: PRODUCES INVALID SCHEMA-0 SPIRV
MAP_ALL = (MAP_TYPES | MAP_NAMES | MAP_FUNCS),
DCE_ALL = (DCE_FUNCS | DCE_VARS | DCE_TYPES),
OPT_ALL = (OPT_LOADSTORE),
ALL_BUT_STRIP = (MAP_ALL | DCE_ALL | OPT_ALL),
DO_EVERYTHING = (STRIP | ALL_BUT_STRIP)
};
};
} // namespace SPV
#if !defined (use_cpp11)
#include <cstdio>
#include <cstdint>
namespace spv {
class spirvbin_t : public spirvbin_base_t
{
public:
spirvbin_t(int /*verbose = 0*/) { }
void remap(std::vector<std::uint32_t>& /*spv*/, unsigned int /*opts = 0*/)
{
printf("Tool not compiled for C++11, which is required for SPIR-V remapping.\n");
exit(5);
}
};
} // namespace SPV
#else // defined (use_cpp11)
#include <functional>
#include <cstdint>
#include <unordered_map>
#include <unordered_set>
#include <map>
#include <set>
#include <cassert>
#include "spirv.hpp"
#include "spvIR.h"
namespace spv {
// class to hold SPIR-V binary data for remapping, DCE, and debug stripping
class spirvbin_t : public spirvbin_base_t
{
public:
spirvbin_t(int verbose = 0) : entryPoint(spv::NoResult), largestNewId(0), verbose(verbose), errorLatch(false)
{ }
virtual ~spirvbin_t() { }
// remap on an existing binary in memory
void remap(std::vector<std::uint32_t>& spv, const std::vector<std::string>& whiteListStrings,
std::uint32_t opts = DO_EVERYTHING);
// remap on an existing binary in memory - legacy interface without white list
void remap(std::vector<std::uint32_t>& spv, std::uint32_t opts = DO_EVERYTHING);
// Type for error/log handler functions
typedef std::function<void(const std::string&)> errorfn_t;
typedef std::function<void(const std::string&)> logfn_t;
// Register error/log handling functions (can be lambda fn / functor / etc)
static void registerErrorHandler(errorfn_t handler) { errorHandler = handler; }
static void registerLogHandler(logfn_t handler) { logHandler = handler; }
protected:
// This can be overridden to provide other message behavior if needed
virtual void msg(int minVerbosity, int indent, const std::string& txt) const;
private:
// Local to global, or global to local ID map
typedef std::unordered_map<spv::Id, spv::Id> idmap_t;
typedef std::unordered_set<spv::Id> idset_t;
typedef std::unordered_map<spv::Id, int> blockmap_t;
void remap(std::uint32_t opts = DO_EVERYTHING);
// Map of names to IDs
typedef std::unordered_map<std::string, spv::Id> namemap_t;
typedef std::uint32_t spirword_t;
typedef std::pair<unsigned, unsigned> range_t;
typedef std::function<void(spv::Id&)> idfn_t;
typedef std::function<bool(spv::Op, unsigned start)> instfn_t;
// Special Values for ID map:
static const spv::Id unmapped; // unchanged from default value
static const spv::Id unused; // unused ID
static const int header_size; // SPIR header = 5 words
class id_iterator_t;
// For mapping type entries between different shaders
typedef std::vector<spirword_t> typeentry_t;
typedef std::map<spv::Id, typeentry_t> globaltypes_t;
// A set that preserves position order, and a reverse map
typedef std::set<int> posmap_t;
typedef std::unordered_map<spv::Id, int> posmap_rev_t;
// Maps and ID to the size of its base type, if known.
typedef std::unordered_map<spv::Id, unsigned> typesize_map_t;
// handle error
void error(const std::string& txt) const { errorLatch = true; errorHandler(txt); }
bool isConstOp(spv::Op opCode) const;
bool isTypeOp(spv::Op opCode) const;
bool isStripOp(spv::Op opCode) const;
bool isFlowCtrl(spv::Op opCode) const;
range_t literalRange(spv::Op opCode) const;
range_t typeRange(spv::Op opCode) const;
range_t constRange(spv::Op opCode) const;
unsigned typeSizeInWords(spv::Id id) const;
unsigned idTypeSizeInWords(spv::Id id) const;
bool isStripOp(spv::Op opCode, unsigned start) const;
spv::Id& asId(unsigned word) { return spv[word]; }
const spv::Id& asId(unsigned word) const { return spv[word]; }
spv::Op asOpCode(unsigned word) const { return opOpCode(spv[word]); }
std::uint32_t asOpCodeHash(unsigned word);
spv::Decoration asDecoration(unsigned word) const { return spv::Decoration(spv[word]); }
unsigned asWordCount(unsigned word) const { return opWordCount(spv[word]); }
spv::Id asTypeConstId(unsigned word) const { return asId(word + (isTypeOp(asOpCode(word)) ? 1 : 2)); }
unsigned idPos(spv::Id id) const;
static unsigned opWordCount(spirword_t data) { return data >> spv::WordCountShift; }
static spv::Op opOpCode(spirword_t data) { return spv::Op(data & spv::OpCodeMask); }
// Header access & set methods
spirword_t magic() const { return spv[0]; } // return magic number
spirword_t bound() const { return spv[3]; } // return Id bound from header
spirword_t bound(spirword_t b) { return spv[3] = b; }
spirword_t genmagic() const { return spv[2]; } // generator magic
spirword_t genmagic(spirword_t m) { return spv[2] = m; }
spirword_t schemaNum() const { return spv[4]; } // schema number from header
// Mapping fns: get
spv::Id localId(spv::Id id) const { return idMapL[id]; }
// Mapping fns: set
inline spv::Id localId(spv::Id id, spv::Id newId);
void countIds(spv::Id id);
// Return next unused new local ID.
// NOTE: boost::dynamic_bitset would be more efficient due to find_next(),
// which std::vector<bool> doens't have.
inline spv::Id nextUnusedId(spv::Id id);
void buildLocalMaps();
std::string literalString(unsigned word) const; // Return literal as a std::string
int literalStringWords(const std::string& str) const { return (int(str.size())+4)/4; }
bool isNewIdMapped(spv::Id newId) const { return isMapped(newId); }
bool isOldIdUnmapped(spv::Id oldId) const { return localId(oldId) == unmapped; }
bool isOldIdUnused(spv::Id oldId) const { return localId(oldId) == unused; }
bool isOldIdMapped(spv::Id oldId) const { return !isOldIdUnused(oldId) && !isOldIdUnmapped(oldId); }
bool isFunction(spv::Id oldId) const { return fnPos.find(oldId) != fnPos.end(); }
// bool matchType(const globaltypes_t& globalTypes, spv::Id lt, spv::Id gt) const;
// spv::Id findType(const globaltypes_t& globalTypes, spv::Id lt) const;
std::uint32_t hashType(unsigned typeStart) const;
spirvbin_t& process(instfn_t, idfn_t, unsigned begin = 0, unsigned end = 0);
int processInstruction(unsigned word, instfn_t, idfn_t);
void validate() const;
void mapTypeConst();
void mapFnBodies();
void optLoadStore();
void dceFuncs();
void dceVars();
void dceTypes();
void mapNames();
void foldIds(); // fold IDs to smallest space
void forwardLoadStores(); // load store forwarding (EXPERIMENTAL)
void offsetIds(); // create relative offset IDs
void applyMap(); // remap per local name map
void mapRemainder(); // map any IDs we haven't touched yet
void stripDebug(); // strip all debug info
void stripDeadRefs(); // strips debug info for now-dead references after DCE
void strip(); // remove debug symbols
std::vector<spirword_t> spv; // SPIR words
std::vector<std::string> stripWhiteList;
namemap_t nameMap; // ID names from OpName
// Since we want to also do binary ops, we can't use std::vector<bool>. we could use
// boost::dynamic_bitset, but we're trying to avoid a boost dependency.
typedef std::uint64_t bits_t;
std::vector<bits_t> mapped; // which new IDs have been mapped
static const int mBits = sizeof(bits_t) * 4;
bool isMapped(spv::Id id) const { return id < maxMappedId() && ((mapped[id/mBits] & (1LL<<(id%mBits))) != 0); }
void setMapped(spv::Id id) { resizeMapped(id); mapped[id/mBits] |= (1LL<<(id%mBits)); }
void resizeMapped(spv::Id id) { if (id >= maxMappedId()) mapped.resize(id/mBits+1, 0); }
size_t maxMappedId() const { return mapped.size() * mBits; }
// Add a strip range for a given instruction starting at 'start'
// Note: avoiding brace initializers to please older versions os MSVC.
void stripInst(unsigned start) { stripRange.push_back(range_t(start, start + asWordCount(start))); }
// Function start and end. use unordered_map because we'll have
// many fewer functions than IDs.
std::unordered_map<spv::Id, range_t> fnPos;
// Which functions are called, anywhere in the module, with a call count
std::unordered_map<spv::Id, int> fnCalls;
posmap_t typeConstPos; // word positions that define types & consts (ordered)
posmap_rev_t idPosR; // reverse map from IDs to positions
typesize_map_t idTypeSizeMap; // maps each ID to its type size, if known.
std::vector<spv::Id> idMapL; // ID {M}ap from {L}ocal to {G}lobal IDs
spv::Id entryPoint; // module entry point
spv::Id largestNewId; // biggest new ID we have mapped anything to
// Sections of the binary to strip, given as [begin,end)
std::vector<range_t> stripRange;
// processing options:
std::uint32_t options;
int verbose; // verbosity level
// Error latch: this is set if the error handler is ever executed. It would be better to
// use a try/catch block and throw, but that's not desired for certain environments, so
// this is the alternative.
mutable bool errorLatch;
static errorfn_t errorHandler;
static logfn_t logHandler;
};
} // namespace SPV
#endif // defined (use_cpp11)
#endif // SPIRVREMAPPER_H
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