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// Header for WorkitemHandler, a parent class for all implementations of
// work-group generation.
//
// Copyright (c) 2012-2019 Pekka Jääskeläinen
// 2024 Pekka Jääskeläinen / Intel Finland Oy
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to
// deal in 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:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// 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
// AUTHORS 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
// IN THE SOFTWARE.
#ifndef POCL_WORKITEM_HANDLER_H
#define POCL_WORKITEM_HANDLER_H
#include "config.h"
#include "Kernel.h"
#include <llvm/IR/Function.h>
#include <llvm/IR/PassManager.h>
#include <llvm/Pass.h>
#include <llvm/Support/CommandLine.h>
namespace pocl {
// Common base class for work-group function generators that includes
// utility functionality.
class WorkitemHandler {
public:
// Should be called when starting to process a new kernel.
void Initialize(pocl::Kernel *K);
protected:
void movePhiNodes(llvm::BasicBlock *Src, llvm::BasicBlock *Dst);
bool fixUndominatedVariableUses (llvm::DominatorTree &DT, llvm::Function &F);
bool dominatesUse (llvm::DominatorTree &DT, llvm::Instruction &Inst,
unsigned OpNum);
llvm::Instruction *getGlobalSize(int Dim);
llvm::Instruction *getGlobalIdOrigin(int dim);
void GenerateGlobalIdComputation();
llvm::AllocaInst *createAlignedAndPaddedContextAlloca(
llvm::Instruction *Inst, llvm::Instruction *Before,
const std::string &Name, bool &PaddingAdded);
// The handler should override these to return the linear and n-dimensional
// work-item index in the parallel region with the given \param Instr.
// The Value should be reachable by the given \param Instr.
virtual llvm::Value *getLinearWIIndexInRegion(llvm::Instruction *Instr) {
return nullptr;
};
virtual llvm::Instruction *getLocalIdInRegion(llvm::Instruction *Instr,
size_t Dim) {
return nullptr;
};
llvm::GetElementPtrInst *
createContextArrayGEP(llvm::AllocaInst *CtxArrayAlloca,
llvm::Instruction *Before, bool AlignPadding);
bool canAnnotateParallelLoops();
bool handleLocalMemAllocas();
void handleWorkitemFunctions();
llvm::Instruction *getWorkGroupSizeInstr();
// The type of size_t for the current target.
llvm::Type *ST;
// The width of size_t for the current target.
int SizeTWidth;
// The Module global variables that hold the place of the current local
// id until privatized.
std::array<llvm::Value *, 3> LocalIdGlobals;
std::array<llvm::Value *, 3> LocalSizeGlobals;
std::array<llvm::Value *, 3> GlobalIdGlobals;
std::array<llvm::Value *, 3> GroupIdGlobals;
std::array<llvm::Value *, 3> NumGroupsGlobals;
// Points to the global size computation instructions in the entry
// block of the currently handled kernel.
std::array<llvm::Instruction *, 3> GlobalSizes;
// Points to the global id origin computation instructions in the entry
// block of the currently handled kernel. To get the global id, the current
// local id must be added to it.
std::array<llvm::Instruction *, 3> GlobalIdOrigins;
// Points to the __pocl_local_mem_alloca pseudo function declaration, if
// it's been referred to in the currently processed module.
llvm::Function *LocalMemAllocaFuncDecl;
// Points to the __pocl_work_group_alloca pseudo function declaration, if
// it's been referred to in the currently processed module.
llvm::Function *WorkGroupAllocaFuncDecl;
// Points to the work-group size computation instruction in the entry
// block of the currently handled kernel. Will be created with the first
// call to getWorkGroupSizeInstr.
llvm::Instruction *WGSizeInstr;
// The currently handled Kernel/Function and its Module.
pocl::Kernel *K;
llvm::Module *M;
// Copies of compilation parameters
std::string KernelName;
unsigned long AddressBits;
bool WGAssumeZeroGlobalOffset;
bool WGDynamicLocalSize;
bool DeviceUsingArgBufferLauncher;
bool DeviceIsSPMD;
unsigned long WGLocalSizeX;
unsigned long WGLocalSizeY;
unsigned long WGLocalSizeZ;
unsigned long WGMaxGridDimWidth;
};
}
#endif
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