You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
62 lines
2.2 KiB
62 lines
2.2 KiB
//===-- CGOpenMPRuntimeAMDGCN.cpp - Interface to OpenMP AMDGCN Runtimes --===//
|
|
//
|
|
// 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
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This provides a class for OpenMP runtime code generation specialized to
|
|
// AMDGCN targets from generalized CGOpenMPRuntimeGPU class.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "CGOpenMPRuntimeAMDGCN.h"
|
|
#include "CGOpenMPRuntimeGPU.h"
|
|
#include "CodeGenFunction.h"
|
|
#include "clang/AST/Attr.h"
|
|
#include "clang/AST/DeclOpenMP.h"
|
|
#include "clang/AST/StmtOpenMP.h"
|
|
#include "clang/AST/StmtVisitor.h"
|
|
#include "clang/Basic/Cuda.h"
|
|
#include "llvm/ADT/SmallPtrSet.h"
|
|
#include "llvm/IR/IntrinsicsAMDGPU.h"
|
|
|
|
using namespace clang;
|
|
using namespace CodeGen;
|
|
using namespace llvm::omp;
|
|
|
|
CGOpenMPRuntimeAMDGCN::CGOpenMPRuntimeAMDGCN(CodeGenModule &CGM)
|
|
: CGOpenMPRuntimeGPU(CGM) {
|
|
if (!CGM.getLangOpts().OpenMPIsDevice)
|
|
llvm_unreachable("OpenMP AMDGCN can only handle device code.");
|
|
}
|
|
|
|
llvm::Value *CGOpenMPRuntimeAMDGCN::getGPUWarpSize(CodeGenFunction &CGF) {
|
|
CGBuilderTy &Bld = CGF.Builder;
|
|
// return constant compile-time target-specific warp size
|
|
unsigned WarpSize = CGF.getTarget().getGridValue(llvm::omp::GV_Warp_Size);
|
|
return Bld.getInt32(WarpSize);
|
|
}
|
|
|
|
llvm::Value *CGOpenMPRuntimeAMDGCN::getGPUThreadID(CodeGenFunction &CGF) {
|
|
CGBuilderTy &Bld = CGF.Builder;
|
|
llvm::Function *F =
|
|
CGF.CGM.getIntrinsic(llvm::Intrinsic::amdgcn_workitem_id_x);
|
|
return Bld.CreateCall(F, llvm::None, "nvptx_tid");
|
|
}
|
|
|
|
llvm::Value *CGOpenMPRuntimeAMDGCN::getGPUNumThreads(CodeGenFunction &CGF) {
|
|
CGBuilderTy &Bld = CGF.Builder;
|
|
llvm::Module *M = &CGF.CGM.getModule();
|
|
const char *LocSize = "__ockl_get_local_size";
|
|
llvm::Function *F = M->getFunction(LocSize);
|
|
if (!F) {
|
|
F = llvm::Function::Create(
|
|
llvm::FunctionType::get(CGF.Int64Ty, {CGF.Int32Ty}, false),
|
|
llvm::GlobalVariable::ExternalLinkage, LocSize, &CGF.CGM.getModule());
|
|
}
|
|
return Bld.CreateTrunc(
|
|
Bld.CreateCall(F, {Bld.getInt32(0)}, "nvptx_num_threads"), CGF.Int32Ty);
|
|
}
|