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diff --git a/contrib/llvm/tools/clang/lib/CodeGen/CGCUDANV.cpp b/contrib/llvm/tools/clang/lib/CodeGen/CGCUDANV.cpp
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+//===----- CGCUDANV.cpp - Interface to NVIDIA CUDA Runtime ----------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This provides a class for CUDA code generation targeting the NVIDIA CUDA
+// runtime library.
+//
+//===----------------------------------------------------------------------===//
+
+#include "CGCUDARuntime.h"
+#include "CodeGenFunction.h"
+#include "CodeGenModule.h"
+#include "clang/AST/Decl.h"
+#include "llvm/IR/BasicBlock.h"
+#include "llvm/IR/CallSite.h"
+#include "llvm/IR/Constants.h"
+#include "llvm/IR/DerivedTypes.h"
+
+using namespace clang;
+using namespace CodeGen;
+
+namespace {
+
+class CGNVCUDARuntime : public CGCUDARuntime {
+
+private:
+ llvm::Type *IntTy, *SizeTy, *VoidTy;
+ llvm::PointerType *CharPtrTy, *VoidPtrTy, *VoidPtrPtrTy;
+
+ /// Convenience reference to LLVM Context
+ llvm::LLVMContext &Context;
+ /// Convenience reference to the current module
+ llvm::Module &TheModule;
+ /// Keeps track of kernel launch stubs emitted in this module
+ llvm::SmallVector<llvm::Function *, 16> EmittedKernels;
+ /// Keeps track of variables containing handles of GPU binaries. Populated by
+ /// ModuleCtorFunction() and used to create corresponding cleanup calls in
+ /// ModuleDtorFunction()
+ llvm::SmallVector<llvm::GlobalVariable *, 16> GpuBinaryHandles;
+
+ llvm::Constant *getSetupArgumentFn() const;
+ llvm::Constant *getLaunchFn() const;
+
+ /// Creates a function to register all kernel stubs generated in this module.
+ llvm::Function *makeRegisterKernelsFn();
+
+ /// Helper function that generates a constant string and returns a pointer to
+ /// the start of the string. The result of this function can be used anywhere
+ /// where the C code specifies const char*.
+ llvm::Constant *makeConstantString(const std::string &Str,
+ const std::string &Name = "",
+ unsigned Alignment = 0) {
+ llvm::Constant *Zeros[] = {llvm::ConstantInt::get(SizeTy, 0),
+ llvm::ConstantInt::get(SizeTy, 0)};
+ auto *ConstStr = CGM.GetAddrOfConstantCString(Str, Name.c_str());
+ return llvm::ConstantExpr::getGetElementPtr(ConstStr->getValueType(),
+ ConstStr, Zeros);
+ }
+
+ void emitDeviceStubBody(CodeGenFunction &CGF, FunctionArgList &Args);
+
+public:
+ CGNVCUDARuntime(CodeGenModule &CGM);
+
+ void emitDeviceStub(CodeGenFunction &CGF, FunctionArgList &Args) override;
+ /// Creates module constructor function
+ llvm::Function *makeModuleCtorFunction() override;
+ /// Creates module destructor function
+ llvm::Function *makeModuleDtorFunction() override;
+};
+
+}
+
+CGNVCUDARuntime::CGNVCUDARuntime(CodeGenModule &CGM)
+ : CGCUDARuntime(CGM), Context(CGM.getLLVMContext()),
+ TheModule(CGM.getModule()) {
+ CodeGen::CodeGenTypes &Types = CGM.getTypes();
+ ASTContext &Ctx = CGM.getContext();
+
+ IntTy = Types.ConvertType(Ctx.IntTy);
+ SizeTy = Types.ConvertType(Ctx.getSizeType());
+ VoidTy = llvm::Type::getVoidTy(Context);
+
+ CharPtrTy = llvm::PointerType::getUnqual(Types.ConvertType(Ctx.CharTy));
+ VoidPtrTy = cast<llvm::PointerType>(Types.ConvertType(Ctx.VoidPtrTy));
+ VoidPtrPtrTy = VoidPtrTy->getPointerTo();
+}
+
+llvm::Constant *CGNVCUDARuntime::getSetupArgumentFn() const {
+ // cudaError_t cudaSetupArgument(void *, size_t, size_t)
+ std::vector<llvm::Type*> Params;
+ Params.push_back(VoidPtrTy);
+ Params.push_back(SizeTy);
+ Params.push_back(SizeTy);
+ return CGM.CreateRuntimeFunction(llvm::FunctionType::get(IntTy,
+ Params, false),
+ "cudaSetupArgument");
+}
+
+llvm::Constant *CGNVCUDARuntime::getLaunchFn() const {
+ // cudaError_t cudaLaunch(char *)
+ return CGM.CreateRuntimeFunction(
+ llvm::FunctionType::get(IntTy, CharPtrTy, false), "cudaLaunch");
+}
+
+void CGNVCUDARuntime::emitDeviceStub(CodeGenFunction &CGF,
+ FunctionArgList &Args) {
+ EmittedKernels.push_back(CGF.CurFn);
+ emitDeviceStubBody(CGF, Args);
+}
+
+void CGNVCUDARuntime::emitDeviceStubBody(CodeGenFunction &CGF,
+ FunctionArgList &Args) {
+ // Build the argument value list and the argument stack struct type.
+ SmallVector<llvm::Value *, 16> ArgValues;
+ std::vector<llvm::Type *> ArgTypes;
+ for (FunctionArgList::const_iterator I = Args.begin(), E = Args.end();
+ I != E; ++I) {
+ llvm::Value *V = CGF.GetAddrOfLocalVar(*I);
+ ArgValues.push_back(V);
+ assert(isa<llvm::PointerType>(V->getType()) && "Arg type not PointerType");
+ ArgTypes.push_back(cast<llvm::PointerType>(V->getType())->getElementType());
+ }
+ llvm::StructType *ArgStackTy = llvm::StructType::get(Context, ArgTypes);
+
+ llvm::BasicBlock *EndBlock = CGF.createBasicBlock("setup.end");
+
+ // Emit the calls to cudaSetupArgument
+ llvm::Constant *cudaSetupArgFn = getSetupArgumentFn();
+ for (unsigned I = 0, E = Args.size(); I != E; ++I) {
+ llvm::Value *Args[3];
+ llvm::BasicBlock *NextBlock = CGF.createBasicBlock("setup.next");
+ Args[0] = CGF.Builder.CreatePointerCast(ArgValues[I], VoidPtrTy);
+ Args[1] = CGF.Builder.CreateIntCast(
+ llvm::ConstantExpr::getSizeOf(ArgTypes[I]),
+ SizeTy, false);
+ Args[2] = CGF.Builder.CreateIntCast(
+ llvm::ConstantExpr::getOffsetOf(ArgStackTy, I),
+ SizeTy, false);
+ llvm::CallSite CS = CGF.EmitRuntimeCallOrInvoke(cudaSetupArgFn, Args);
+ llvm::Constant *Zero = llvm::ConstantInt::get(IntTy, 0);
+ llvm::Value *CSZero = CGF.Builder.CreateICmpEQ(CS.getInstruction(), Zero);
+ CGF.Builder.CreateCondBr(CSZero, NextBlock, EndBlock);
+ CGF.EmitBlock(NextBlock);
+ }
+
+ // Emit the call to cudaLaunch
+ llvm::Constant *cudaLaunchFn = getLaunchFn();
+ llvm::Value *Arg = CGF.Builder.CreatePointerCast(CGF.CurFn, CharPtrTy);
+ CGF.EmitRuntimeCallOrInvoke(cudaLaunchFn, Arg);
+ CGF.EmitBranch(EndBlock);
+
+ CGF.EmitBlock(EndBlock);
+}
+
+/// Creates internal function to register all kernel stubs generated in this
+/// module with the CUDA runtime.
+/// \code
+/// void __cuda_register_kernels(void** GpuBinaryHandle) {
+/// __cudaRegisterFunction(GpuBinaryHandle,Kernel0,...);
+/// ...
+/// __cudaRegisterFunction(GpuBinaryHandle,KernelM,...);
+/// }
+/// \endcode
+llvm::Function *CGNVCUDARuntime::makeRegisterKernelsFn() {
+ llvm::Function *RegisterKernelsFunc = llvm::Function::Create(
+ llvm::FunctionType::get(VoidTy, VoidPtrPtrTy, false),
+ llvm::GlobalValue::InternalLinkage, "__cuda_register_kernels", &TheModule);
+ llvm::BasicBlock *EntryBB =
+ llvm::BasicBlock::Create(Context, "entry", RegisterKernelsFunc);
+ CGBuilderTy Builder(Context);
+ Builder.SetInsertPoint(EntryBB);
+
+ // void __cudaRegisterFunction(void **, const char *, char *, const char *,
+ // int, uint3*, uint3*, dim3*, dim3*, int*)
+ std::vector<llvm::Type *> RegisterFuncParams = {
+ VoidPtrPtrTy, CharPtrTy, CharPtrTy, CharPtrTy, IntTy,
+ VoidPtrTy, VoidPtrTy, VoidPtrTy, VoidPtrTy, IntTy->getPointerTo()};
+ llvm::Constant *RegisterFunc = CGM.CreateRuntimeFunction(
+ llvm::FunctionType::get(IntTy, RegisterFuncParams, false),
+ "__cudaRegisterFunction");
+
+ // Extract GpuBinaryHandle passed as the first argument passed to
+ // __cuda_register_kernels() and generate __cudaRegisterFunction() call for
+ // each emitted kernel.
+ llvm::Argument &GpuBinaryHandlePtr = *RegisterKernelsFunc->arg_begin();
+ for (llvm::Function *Kernel : EmittedKernels) {
+ llvm::Constant *KernelName = makeConstantString(Kernel->getName());
+ llvm::Constant *NullPtr = llvm::ConstantPointerNull::get(VoidPtrTy);
+ llvm::Value *args[] = {
+ &GpuBinaryHandlePtr, Builder.CreateBitCast(Kernel, VoidPtrTy),
+ KernelName, KernelName, llvm::ConstantInt::get(IntTy, -1), NullPtr,
+ NullPtr, NullPtr, NullPtr,
+ llvm::ConstantPointerNull::get(IntTy->getPointerTo())};
+ Builder.CreateCall(RegisterFunc, args);
+ }
+
+ Builder.CreateRetVoid();
+ return RegisterKernelsFunc;
+}
+
+/// Creates a global constructor function for the module:
+/// \code
+/// void __cuda_module_ctor(void*) {
+/// Handle0 = __cudaRegisterFatBinary(GpuBinaryBlob0);
+/// __cuda_register_kernels(Handle0);
+/// ...
+/// HandleN = __cudaRegisterFatBinary(GpuBinaryBlobN);
+/// __cuda_register_kernels(HandleN);
+/// }
+/// \endcode
+llvm::Function *CGNVCUDARuntime::makeModuleCtorFunction() {
+ // void __cuda_register_kernels(void* handle);
+ llvm::Function *RegisterKernelsFunc = makeRegisterKernelsFn();
+ // void ** __cudaRegisterFatBinary(void *);
+ llvm::Constant *RegisterFatbinFunc = CGM.CreateRuntimeFunction(
+ llvm::FunctionType::get(VoidPtrPtrTy, VoidPtrTy, false),
+ "__cudaRegisterFatBinary");
+ // struct { int magic, int version, void * gpu_binary, void * dont_care };
+ llvm::StructType *FatbinWrapperTy =
+ llvm::StructType::get(IntTy, IntTy, VoidPtrTy, VoidPtrTy, nullptr);
+
+ llvm::Function *ModuleCtorFunc = llvm::Function::Create(
+ llvm::FunctionType::get(VoidTy, VoidPtrTy, false),
+ llvm::GlobalValue::InternalLinkage, "__cuda_module_ctor", &TheModule);
+ llvm::BasicBlock *CtorEntryBB =
+ llvm::BasicBlock::Create(Context, "entry", ModuleCtorFunc);
+ CGBuilderTy CtorBuilder(Context);
+
+ CtorBuilder.SetInsertPoint(CtorEntryBB);
+
+ // For each GPU binary, register it with the CUDA runtime and store returned
+ // handle in a global variable and save the handle in GpuBinaryHandles vector
+ // to be cleaned up in destructor on exit. Then associate all known kernels
+ // with the GPU binary handle so CUDA runtime can figure out what to call on
+ // the GPU side.
+ for (const std::string &GpuBinaryFileName :
+ CGM.getCodeGenOpts().CudaGpuBinaryFileNames) {
+ llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> GpuBinaryOrErr =
+ llvm::MemoryBuffer::getFileOrSTDIN(GpuBinaryFileName);
+ if (std::error_code EC = GpuBinaryOrErr.getError()) {
+ CGM.getDiags().Report(diag::err_cannot_open_file) << GpuBinaryFileName
+ << EC.message();
+ continue;
+ }
+
+ // Create initialized wrapper structure that points to the loaded GPU binary
+ llvm::Constant *Values[] = {
+ llvm::ConstantInt::get(IntTy, 0x466243b1), // Fatbin wrapper magic.
+ llvm::ConstantInt::get(IntTy, 1), // Fatbin version.
+ makeConstantString(GpuBinaryOrErr.get()->getBuffer(), "", 16), // Data.
+ llvm::ConstantPointerNull::get(VoidPtrTy)}; // Unused in fatbin v1.
+ llvm::GlobalVariable *FatbinWrapper = new llvm::GlobalVariable(
+ TheModule, FatbinWrapperTy, true, llvm::GlobalValue::InternalLinkage,
+ llvm::ConstantStruct::get(FatbinWrapperTy, Values),
+ "__cuda_fatbin_wrapper");
+
+ // GpuBinaryHandle = __cudaRegisterFatBinary(&FatbinWrapper);
+ llvm::CallInst *RegisterFatbinCall = CtorBuilder.CreateCall(
+ RegisterFatbinFunc,
+ CtorBuilder.CreateBitCast(FatbinWrapper, VoidPtrTy));
+ llvm::GlobalVariable *GpuBinaryHandle = new llvm::GlobalVariable(
+ TheModule, VoidPtrPtrTy, false, llvm::GlobalValue::InternalLinkage,
+ llvm::ConstantPointerNull::get(VoidPtrPtrTy), "__cuda_gpubin_handle");
+ CtorBuilder.CreateStore(RegisterFatbinCall, GpuBinaryHandle, false);
+
+ // Call __cuda_register_kernels(GpuBinaryHandle);
+ CtorBuilder.CreateCall(RegisterKernelsFunc, RegisterFatbinCall);
+
+ // Save GpuBinaryHandle so we can unregister it in destructor.
+ GpuBinaryHandles.push_back(GpuBinaryHandle);
+ }
+
+ CtorBuilder.CreateRetVoid();
+ return ModuleCtorFunc;
+}
+
+/// Creates a global destructor function that unregisters all GPU code blobs
+/// registered by constructor.
+/// \code
+/// void __cuda_module_dtor(void*) {
+/// __cudaUnregisterFatBinary(Handle0);
+/// ...
+/// __cudaUnregisterFatBinary(HandleN);
+/// }
+/// \endcode
+llvm::Function *CGNVCUDARuntime::makeModuleDtorFunction() {
+ // void __cudaUnregisterFatBinary(void ** handle);
+ llvm::Constant *UnregisterFatbinFunc = CGM.CreateRuntimeFunction(
+ llvm::FunctionType::get(VoidTy, VoidPtrPtrTy, false),
+ "__cudaUnregisterFatBinary");
+
+ llvm::Function *ModuleDtorFunc = llvm::Function::Create(
+ llvm::FunctionType::get(VoidTy, VoidPtrTy, false),
+ llvm::GlobalValue::InternalLinkage, "__cuda_module_dtor", &TheModule);
+ llvm::BasicBlock *DtorEntryBB =
+ llvm::BasicBlock::Create(Context, "entry", ModuleDtorFunc);
+ CGBuilderTy DtorBuilder(Context);
+ DtorBuilder.SetInsertPoint(DtorEntryBB);
+
+ for (llvm::GlobalVariable *GpuBinaryHandle : GpuBinaryHandles) {
+ DtorBuilder.CreateCall(UnregisterFatbinFunc,
+ DtorBuilder.CreateLoad(GpuBinaryHandle, false));
+ }
+
+ DtorBuilder.CreateRetVoid();
+ return ModuleDtorFunc;
+}
+
+CGCUDARuntime *CodeGen::CreateNVCUDARuntime(CodeGenModule &CGM) {
+ return new CGNVCUDARuntime(CGM);
+}
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