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/*========================== begin_copyright_notice ============================
Copyright (C) 2020-2022 Intel Corporation
SPDX-License-Identifier: MIT
============================= end_copyright_notice ===========================*/
#include "vc/Support/BackendConfig.h"
#include <llvm/Support/CommandLine.h>
#include <string>
#define DEBUG_TYPE "GenXBackendConfig"
using namespace llvm;
//===----------------------------------------------------------------------===//
//
// All options that can control backend behavior should be here.
//
//===----------------------------------------------------------------------===//
static cl::opt<bool> GenerateDebugInfoOpt(
"vc-emit-debug-info", cl::Hidden,
cl::desc("Generate DWARF debug info for each compiled kernel"));
static cl::opt<bool> EmitDebuggableKernelsOpt(
"vc-emit-debuggable-kernels", cl::Hidden,
cl::desc("Emit kernels suitable for interaction with the debugger"));
static cl::opt<bool> DumpRegAllocOpt(
"genx-dump-regalloc", cl::Hidden,
cl::desc(
"Enable dumping of GenX liveness and register allocation to a file."));
static cl::opt<unsigned> StackMemSizeOpt("stack-mem-size",
cl::desc("Available space for stack"));
static cl::opt<bool>
EnableAsmDumpsOpt("genx-enable-asm-dumps",
cl::desc("Enable finalizer assembly dumps"));
static cl::opt<bool>
EnableDebugInfoDumpOpt("vc-enable-dbginfo-dumps",
cl::desc("Enable debug information-related dumps"));
static cl::opt<std::string> DebugInfoDumpsNameOverrideOpt(
"vc-dbginfo-dumps-name-override",
cl::desc("Override for 'suffix' part of debug info dump name"));
static cl::opt<std::string>
OCLGenericBiFPath("vc-ocl-generic-bif-path",
cl::desc("full name (with path) of a BiF file with "
"precompiled OpenCL generic builtins"),
cl::init(""));
static cl::opt<std::string>
VCEmulationBiFPath("vc-emulation-bif-path",
cl::desc("full name (with path) of a BiF file with "
"precompiled emulation routines"),
cl::init(""));
static cl::opt<std::string>
VCSPIRVBuiltinsBiFPath("vc-spirv-builtins-bif-path",
cl::desc("full name (with path) of a BiF file with "
"precompiled SPIR-V builtins"),
cl::init(""));
static cl::opt<std::string>
VCPrintfBiFPath("vc-printf-bif-path",
cl::desc("full name (with path) of a BiF file with "
"precompiled printf implementation"),
cl::init(""));
static cl::opt<bool> LocalizeLRsForAccUsageOpt(
"vc-acc-split", cl::Hidden,
cl::desc("Localize arithmetic chain to reduce accumulator usages"));
static cl::opt<bool>
DisableLRCoalescingOpt("vc-disable-coalescing", cl::Hidden,
cl::desc("disable coalescing of live ranges"));
static cl::opt<bool>
DisableExtraCoalescingOpt("vc-disable-extra-coalescing", cl::Hidden,
cl::desc("disable extrac coalescing"));
static cl::opt<bool> DisableNonOverlappingRegionOptOpt(
"vc-disable-non-overlapping-region-opt", cl::Hidden,
cl::desc("Disable non-overlapping region optimization"));
static cl::opt<bool>
UseNewStackBuilderOpt("vc-use-new-stack-builder",
cl::desc("Use prolog/epilog insertion pass"));
static cl::opt<unsigned>
StatelessPrivateMemSizeOpt("dbgonly-enforce-privmem-stateless",
cl::desc("Enforce stateless privmem size"));
static cl::opt<FunctionControl> FunctionControlOpt(
"vc-function-control", cl::desc("Force special calls (see supported enum)"),
cl::values(clEnumValN(FunctionControl::Default, "default", "Default"),
clEnumValN(FunctionControl::StackCall, "stackcall",
"Stackcall")));
static cl::opt<bool> LargeGRFModeOpt("vc-large-grf",
cl::desc("Enable large GRF mode"));
static cl::opt<bool> UseBindlessBuffersOpt("vc-use-bindless-buffers",
cl::desc("Use bindless buffers"));
static cl::opt<bool> EnablePreemptionOpt("vc-enable-preemption",
cl::desc("Enable preemption"));
static cl::opt<bool> SaveStackCallLinkageOpt(
"save-stack-call-linkage", cl::Hidden,
cl::desc("Do not override stack calls linkage as internal"));
static cl::opt<bool> UsePlain2DImagesOpt(
"vc-use-plain-2d-images", cl::Hidden,
cl::desc("Treat \"image2d_t\" annotation as non-media image"));
static cl::opt<bool>
L3FlushForGlobalOpt("vc-flush-l3-for-global", cl::Hidden,
cl::desc("Enable flushing L3 cache for globals"));
static cl::opt<bool> GPUFenceScopeOnSingleTileGPUsOpt(
"vc-gpu-scope-fence-on-single-tile", cl::Hidden,
cl::desc("Allow the use of \"GPU\" fence scope on single-tile GPUs."));
static cl::opt<bool> DirectCallsOnlyOpt(
"direct-calls-only", cl::Hidden,
cl::desc(
"Generate code under the assumption all unknown calls are direct"));
static cl::opt<unsigned> VCLoopUnrollThreshold(
"vc-loop-unroll-threshold", cl::Hidden,
cl::desc("Threshold value for LLVM loop unroll pass"));
static cl::opt<bool> VCIgnoreLoopUnrollThresholdOnPragma(
"vc-ignore-loop-unroll-threshold-on-pragma", cl::Hidden,
cl::desc("Ignore threshold value for LLVM loop unroll pass when pragma is "
"used"));
static cl::opt<unsigned> InteropSubgroupSizeOpt("vc-interop-subgroup-size", cl::Hidden,
cl::desc("Set subgroup size used for cross-module calls"));
//===----------------------------------------------------------------------===//
//
// Backend config related stuff.
//
//===----------------------------------------------------------------------===//
char GenXBackendConfig::ID = 0;
template <typename DstT, typename OptT>
static void enforceOptionIfSpecified(DstT &Opt, OptT &OptValue) {
if (OptValue.getNumOccurrences())
Opt = OptValue;
}
void GenXBackendOptions::enforceLLVMOptions() {
enforceOptionIfSpecified(DebuggabilityEmitDebuggableKernels,
EmitDebuggableKernelsOpt);
enforceOptionIfSpecified(DebuggabilityEmitDWARF, GenerateDebugInfoOpt);
enforceOptionIfSpecified(DumpRegAlloc, DumpRegAllocOpt);
enforceOptionIfSpecified(StackSurfaceMaxSize, StackMemSizeOpt);
enforceOptionIfSpecified(EnableAsmDumps, EnableAsmDumpsOpt);
enforceOptionIfSpecified(EnableDebugInfoDumps, EnableDebugInfoDumpOpt);
enforceOptionIfSpecified(DebugInfoDumpsNameOverride,
DebugInfoDumpsNameOverrideOpt);
enforceOptionIfSpecified(UseNewStackBuilder, UseNewStackBuilderOpt);
enforceOptionIfSpecified(LocalizeLRsForAccUsage, LocalizeLRsForAccUsageOpt);
enforceOptionIfSpecified(DisableLiveRangesCoalescing, DisableLRCoalescingOpt);
enforceOptionIfSpecified(DisableExtraCoalescing, DisableExtraCoalescingOpt);
enforceOptionIfSpecified(DisableNonOverlappingRegionOpt,
DisableNonOverlappingRegionOptOpt);
enforceOptionIfSpecified(FCtrl, FunctionControlOpt);
enforceOptionIfSpecified(IsLargeGRFMode, LargeGRFModeOpt);
enforceOptionIfSpecified(UseBindlessBuffers, UseBindlessBuffersOpt);
enforceOptionIfSpecified(StatelessPrivateMemSize, StatelessPrivateMemSizeOpt);
enforceOptionIfSpecified(SaveStackCallLinkage, SaveStackCallLinkageOpt);
enforceOptionIfSpecified(UsePlain2DImages, UsePlain2DImagesOpt);
enforceOptionIfSpecified(L3FlushForGlobal, L3FlushForGlobalOpt);
enforceOptionIfSpecified(GPUFenceScopeOnSingleTileGPUs,
GPUFenceScopeOnSingleTileGPUsOpt);
enforceOptionIfSpecified(EnablePreemption, EnablePreemptionOpt);
enforceOptionIfSpecified(DirectCallsOnly, DirectCallsOnlyOpt);
enforceOptionIfSpecified(LoopUnrollThreshold, VCLoopUnrollThreshold);
enforceOptionIfSpecified(IgnoreLoopUnrollThresholdOnPragma,
VCIgnoreLoopUnrollThresholdOnPragma);
enforceOptionIfSpecified(InteropSubgroupSize, InteropSubgroupSizeOpt);
}
static std::unique_ptr<MemoryBuffer>
readBiFModuleFromFile(const cl::opt<std::string> &File) {
if (File.getNumOccurrences() == 0)
return nullptr;
ErrorOr<std::unique_ptr<MemoryBuffer>> FileOrErr =
MemoryBuffer::getFileOrSTDIN(File);
if (!FileOrErr)
report_fatal_error(llvm::StringRef("opening OpenCL BiF file failed: " +
FileOrErr.getError().message()));
return std::move(FileOrErr.get());
}
GenXBackendData::GenXBackendData(InitFromLLMVOpts) {
setOwningBiFModuleIf(BiFKind::OCLGeneric,
readBiFModuleFromFile(OCLGenericBiFPath));
setOwningBiFModuleIf(BiFKind::VCEmulation,
readBiFModuleFromFile(VCEmulationBiFPath));
setOwningBiFModuleIf(BiFKind::VCSPIRVBuiltins,
readBiFModuleFromFile(VCSPIRVBuiltinsBiFPath));
setOwningBiFModuleIf(BiFKind::VCPrintf, readBiFModuleFromFile(VCPrintfBiFPath));
}
void GenXBackendData::setOwningBiFModule(
BiFKind Kind, std::unique_ptr<MemoryBuffer> ModuleBuffer) {
IGC_ASSERT_MESSAGE(ModuleBuffer, "wrong argument");
IGC_ASSERT(static_cast<size_t>(Kind) < BiFModuleOwner.size());
BiFModuleOwner[Kind] = std::move(ModuleBuffer);
BiFModule[Kind] = IGCLLVM::makeMemoryBufferRef(*BiFModuleOwner[Kind]);
}
void GenXBackendData::setOwningBiFModuleIf(
BiFKind Kind, std::unique_ptr<MemoryBuffer> ModuleBuffer) {
if (ModuleBuffer)
setOwningBiFModule(Kind, std::move(ModuleBuffer));
}
GenXBackendConfig::GenXBackendConfig()
: ImmutablePass(ID), Options{GenXBackendOptions::InitFromLLVMOpts{}},
Data{GenXBackendData::InitFromLLMVOpts{}} {
initializeGenXBackendConfigPass(*PassRegistry::getPassRegistry());
}
GenXBackendConfig::GenXBackendConfig(GenXBackendOptions OptionsIn,
GenXBackendData DataIn)
: ImmutablePass(ID), Options(std::move(OptionsIn)),
Data(std::move(DataIn)) {
initializeGenXBackendConfigPass(*PassRegistry::getPassRegistry());
}
INITIALIZE_PASS(GenXBackendConfig, DEBUG_TYPE, DEBUG_TYPE, false, true)
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