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//===-- gen/dcomputetargetOCL.cpp -----------------------------------------===//
//
// LDC – the LLVM D compiler
//
// Parts of this file are adapted from CodeGenFunction.cpp (Clang, LLVM).
// Therefore, this file is distributed under the LLVM license.
// See the LICENSE file for details.
//===----------------------------------------------------------------------===//
#if LDC_LLVM_SUPPORTED_TARGET_SPIRV
#include "dmd/id.h"
#include "dmd/identifier.h"
#include "dmd/template.h"
#include "dmd/module.h"
#include "gen/abi-spirv.h"
#include "gen/dcompute/target.h"
#include "gen/dcompute/druntime.h"
#include "gen/logger.h"
#include "llvm/Transforms/Scalar.h"
#include <cstring>
#include <string>
// from SPIRVInternal.h
#define SPIR_TARGETTRIPLE32 "spir-unknown-unknown"
#define SPIR_TARGETTRIPLE64 "spir64-unknown-unknown"
#define SPIR_DATALAYOUT32 \
"e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32" \
"-i64:64:64-f32:32:32-f64:64:64-v16:16:16-v24:32:32" \
"-v32:32:32-v48:64:64-v64:64:64-v96:128:128" \
"-v128:128:128-v192:256:256-v256:256:256" \
"-v512:512:512-v1024:1024:1024"
#define SPIR_DATALAYOUT64 \
"e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32" \
"-i64:64:64-f32:32:32-f64:64:64-v16:16:16-v24:32:32" \
"-v32:32:32-v48:64:64-v64:64:64-v96:128:128" \
"-v128:128:128-v192:256:256-v256:256:256" \
"-v512:512:512-v1024:1024:1024"
namespace {
class TargetOCL : public DComputeTarget {
bool usedImage;
public:
TargetOCL(llvm::LLVMContext &c, int oclversion)
: DComputeTarget(c, oclversion, OpenCL, "ocl", "spv", createSPIRVABI(),
// Map from nomimal DCompute address space to OpenCL
// address. For OpenCL this is a no-op.
{{0, 1, 2, 3, 4}}) {
const bool is64 = global.params.targetTriple->isArch64Bit();
_ir = new IRState("dcomputeTargetOCL", ctx);
_ir->module.setTargetTriple(is64 ? SPIR_TARGETTRIPLE64
: SPIR_TARGETTRIPLE32);
_ir->module.setDataLayout(is64 ? SPIR_DATALAYOUT64 : SPIR_DATALAYOUT32);
_ir->dcomputetarget = this;
}
// Adapted from clang
void addMetadata() override {
// opencl.ident?
// spirv.Source // debug only
// stuff from clang's CGSPIRMetadataAdder.cpp
// opencl.used.extensions
// opencl.used.optional.core.features
// opencl.compiler.options
// opencl.enable.FP_CONTRACT (-ffast-math)
{
llvm::Metadata *SPIRVerElts[] = {
llvm::ConstantAsMetadata::get(
llvm::ConstantInt::get(llvm::Type::getInt32Ty(ctx), 1)),
llvm::ConstantAsMetadata::get(
llvm::ConstantInt::get(llvm::Type::getInt32Ty(ctx), 2))};
llvm::NamedMDNode *SPIRVerMD =
_ir->module.getOrInsertNamedMetadata("opencl.spir.version");
SPIRVerMD->addOperand(llvm::MDNode::get(ctx, SPIRVerElts));
}
// Add OpenCL version
{
llvm::Metadata *OCLVerElts[] = {
llvm::ConstantAsMetadata::get(llvm::ConstantInt::get(
llvm::Type::getInt32Ty(ctx), tversion / 100)),
llvm::ConstantAsMetadata::get(llvm::ConstantInt::get(
llvm::Type::getInt32Ty(ctx), (tversion % 100) / 10))};
llvm::NamedMDNode *OCLVerMD =
_ir->module.getOrInsertNamedMetadata("opencl.ocl.version");
OCLVerMD->addOperand(llvm::MDNode::get(ctx, OCLVerElts));
}
if (usedImage) {
llvm::NamedMDNode *OCLUsedCoreFeatures =
_ir->module.getOrInsertNamedMetadata("opencl.used.optional.core.features");
llvm::Metadata *OCLUsedCoreFeaturesElts[] = {
llvm::MDString::get(ctx,"cl_images")
};
OCLUsedCoreFeatures->addOperand(llvm::MDNode::get(ctx, OCLUsedCoreFeaturesElts));
}
}
enum KernArgMD {
KernArgMD_addr_space,
KernArgMD_access_qual,
KernArgMD_type,
KernArgMD_base_type,
KernArgMD_type_qual,
KernArgMD_name,
count_KernArgMD
};
void addKernelMetadata(FuncDeclaration *fd, llvm::Function *llf) override {
// By the time we get here the ABI should have rewritten the function
// type so that the magic types in ldc.dcompute are transformed into
// what the LLVM backend expects.
unsigned i = 0;
// TODO: Handle Function attibutes
std::array<llvm::SmallVector<llvm::Metadata *, 8>,count_KernArgMD> paramArgs;
std::array<llvm::StringRef,count_KernArgMD> args = {{
"kernel_arg_addr_space",
"kernel_arg_access_qual",
"kernel_arg_type",
"kernel_arg_type_qual",
"kernel_arg_base_type",
"kernel_arg_name"
}};
VarDeclarations *vs = fd->parameters;
for (i = 0; i < vs->length; i++) {
VarDeclaration *v = (*vs)[i];
decodeTypes(paramArgs, v);
}
for (i = 0; i < count_KernArgMD; i++) {
llf->setMetadata(args[i],llvm::MDNode::get(ctx,paramArgs[i]));
}
}
std::string mod2str(MOD mod) {
return mod & (MODconst | MODimmutable) ? "const" : "";
}
std::string basicTypeToString(Type *t) {
std::stringstream ss;
auto ty = t->ty;
if (ty == TY::Tint8)
ss << "char";
else if (ty == TY::Tuns8)
ss << "uchar";
else if (ty == TY::Tvector) {
TypeVector *vec = static_cast<TypeVector *>(t);
auto size = vec->size(Loc());
auto basety = vec->basetype->ty;
if (basety == TY::Tint8)
ss << "char";
else if (basety == TY::Tuns8)
ss << "uchar";
else
ss << vec->basetype->toChars();
ss << (int)size;
} else
ss << t->toChars();
return ss.str();
}
void decodeTypes(std::array<llvm::SmallVector<llvm::Metadata *, 8>,count_KernArgMD>& attrs,
VarDeclaration *v)
{
llvm::Optional<DcomputePointer> ptr;
std::string typeQuals;
std::string baseTyName;
std::string tyName;
std::string accessQual = "none";
int addrspace = 0;
if (v->type->ty == TY::Tstruct &&
(ptr = toDcomputePointer(static_cast<TypeStruct *>(v->type)->sym))) {
addrspace = ptr->addrspace;
tyName = basicTypeToString(ptr->type);
auto ts = ptr->type->isTypeStruct();
if (ts && isFromLDC_OpenCL(ts->sym)) {
// TODO: Pipes
auto name = std::string(ts->toChars());
if (!usedImage && name.rfind("ldc.opencl.image",0) == 0)
usedImage = true;
// parse access qualifiers from ldc.opencl.*_XX_t types like ldc.opencl.image1d_ro_t
// 4 == length of "XX_t"
name = name.substr(name.length()-4, 2);
if (name == "ro")
accessQual = "read_only";
else if (name == "wo")
accessQual = "write_only";
else if (name == "rw")
accessQual = "read_write";
// ldc.opencl.{sampler_t, reserve_id_t} do not get an access qualifier
} else {
// things like e.g. GlobalPointer!opencl.image1d_[ro,wo,rw]_t/sampler_t must not have the additional *
// but all others e.g. GlobalPointer!int must
tyName += "*";
}
// there is no volatile or restrict (yet) in D
typeQuals = mod2str(ptr->type->mod);
// TODO: Images and Pipes They are global pointers to opaques
} else {
tyName = basicTypeToString(v->type);
baseTyName = tyName;
typeQuals = mod2str(v->type->mod);
}
attrs[KernArgMD_addr_space].push_back( // i32 addrspace
llvm::ConstantAsMetadata::get(llvm::ConstantInt::get(
llvm::IntegerType::get(ctx, 32), addrspace)));
attrs[KernArgMD_access_qual].push_back(llvm::MDString::get(ctx, accessQual));
attrs[KernArgMD_type].push_back(llvm::MDString::get(ctx, tyName));
attrs[KernArgMD_base_type].push_back(llvm::MDString::get(ctx, baseTyName));
attrs[KernArgMD_type_qual].push_back(llvm::MDString::get(ctx, typeQuals));
attrs[KernArgMD_name].push_back(llvm::MDString::get(ctx, v->ident->toChars()));
}
};
} // anonymous namespace.
DComputeTarget *createOCLTarget(llvm::LLVMContext &c, int oclver) {
return new TargetOCL(c, oclver);
}
#endif // LDC_LLVM_SUPPORTED_TARGET_SPIRV
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