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//===- TCE.cpp ------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "ABIInfoImpl.h"
#include "TargetInfo.h"
using namespace clang;
using namespace clang::CodeGen;
//===----------------------------------------------------------------------===//
// TCE ABI Implementation (see http://tce.cs.tut.fi). Uses mostly the defaults.
// Currently subclassed only to implement custom OpenCL C function attribute
// handling.
//===----------------------------------------------------------------------===//
namespace {
class TCETargetCodeGenInfo : public TargetCodeGenInfo {
public:
TCETargetCodeGenInfo(CodeGenTypes &CGT)
: TargetCodeGenInfo(std::make_unique<DefaultABIInfo>(CGT)) {}
void setTargetAttributes(const Decl *D, llvm::GlobalValue *GV,
CodeGen::CodeGenModule &M) const override;
};
void TCETargetCodeGenInfo::setTargetAttributes(
const Decl *D, llvm::GlobalValue *GV, CodeGen::CodeGenModule &M) const {
if (GV->isDeclaration())
return;
const FunctionDecl *FD = dyn_cast_or_null<FunctionDecl>(D);
if (!FD) return;
llvm::Function *F = cast<llvm::Function>(GV);
if (M.getLangOpts().OpenCL) {
if (FD->hasAttr<DeviceKernelAttr>()) {
// OpenCL C Kernel functions are not subject to inlining
F->addFnAttr(llvm::Attribute::NoInline);
const ReqdWorkGroupSizeAttr *Attr = FD->getAttr<ReqdWorkGroupSizeAttr>();
if (Attr) {
// Convert the reqd_work_group_size() attributes to metadata.
llvm::LLVMContext &Context = F->getContext();
llvm::NamedMDNode *OpenCLMetadata =
M.getModule().getOrInsertNamedMetadata(
"opencl.kernel_wg_size_info");
auto Eval = [&](Expr *E) {
return E->EvaluateKnownConstInt(FD->getASTContext());
};
SmallVector<llvm::Metadata *, 5> Operands{
llvm::ConstantAsMetadata::get(F),
llvm::ConstantAsMetadata::get(llvm::Constant::getIntegerValue(
M.Int32Ty, Eval(Attr->getXDim()))),
llvm::ConstantAsMetadata::get(llvm::Constant::getIntegerValue(
M.Int32Ty, Eval(Attr->getYDim()))),
llvm::ConstantAsMetadata::get(llvm::Constant::getIntegerValue(
M.Int32Ty, Eval(Attr->getZDim()))),
// Add a boolean constant operand for "required" (true) or "hint"
// (false) for implementing the work_group_size_hint attr later.
// Currently always true as the hint is not yet implemented.
llvm::ConstantAsMetadata::get(llvm::ConstantInt::getTrue(Context))};
OpenCLMetadata->addOperand(llvm::MDNode::get(Context, Operands));
}
}
}
}
}
std::unique_ptr<TargetCodeGenInfo>
CodeGen::createTCETargetCodeGenInfo(CodeGenModule &CGM) {
return std::make_unique<TCETargetCodeGenInfo>(CGM.getTypes());
}
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