| 1 | //===----- CGCUDARuntime.h - Interface to CUDA Runtimes ---------*- C++ -*-===// |
|---|---|
| 2 | // |
| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| 4 | // See https://llvm.org/LICENSE.txt for license information. |
| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| 6 | // |
| 7 | //===----------------------------------------------------------------------===// |
| 8 | // |
| 9 | // This provides an abstract class for CUDA code generation. Concrete |
| 10 | // subclasses of this implement code generation for specific CUDA |
| 11 | // runtime libraries. |
| 12 | // |
| 13 | //===----------------------------------------------------------------------===// |
| 14 | |
| 15 | #ifndef LLVM_CLANG_LIB_CODEGEN_CGCUDARUNTIME_H |
| 16 | #define LLVM_CLANG_LIB_CODEGEN_CGCUDARUNTIME_H |
| 17 | |
| 18 | namespace llvm { |
| 19 | class Function; |
| 20 | class GlobalVariable; |
| 21 | } |
| 22 | |
| 23 | namespace clang { |
| 24 | |
| 25 | class CUDAKernelCallExpr; |
| 26 | class VarDecl; |
| 27 | |
| 28 | namespace CodeGen { |
| 29 | |
| 30 | class CodeGenFunction; |
| 31 | class CodeGenModule; |
| 32 | class FunctionArgList; |
| 33 | class ReturnValueSlot; |
| 34 | class RValue; |
| 35 | |
| 36 | class CGCUDARuntime { |
| 37 | protected: |
| 38 | CodeGenModule &CGM; |
| 39 | |
| 40 | public: |
| 41 | // Global variable properties that must be passed to CUDA runtime. |
| 42 | enum DeviceVarFlags { |
| 43 | ExternDeviceVar = 0x01, // extern |
| 44 | ConstantDeviceVar = 0x02, // __constant__ |
| 45 | }; |
| 46 | |
| 47 | CGCUDARuntime(CodeGenModule &CGM) : CGM(CGM) {} |
| 48 | virtual ~CGCUDARuntime(); |
| 49 | |
| 50 | virtual RValue EmitCUDAKernelCallExpr(CodeGenFunction &CGF, |
| 51 | const CUDAKernelCallExpr *E, |
| 52 | ReturnValueSlot ReturnValue); |
| 53 | |
| 54 | /// Emits a kernel launch stub. |
| 55 | virtual void emitDeviceStub(CodeGenFunction &CGF, FunctionArgList &Args) = 0; |
| 56 | virtual void registerDeviceVar(const VarDecl *VD, llvm::GlobalVariable &Var, |
| 57 | unsigned Flags) = 0; |
| 58 | |
| 59 | /// Constructs and returns a module initialization function or nullptr if it's |
| 60 | /// not needed. Must be called after all kernels have been emitted. |
| 61 | virtual llvm::Function *makeModuleCtorFunction() = 0; |
| 62 | |
| 63 | /// Returns a module cleanup function or nullptr if it's not needed. |
| 64 | /// Must be called after ModuleCtorFunction |
| 65 | virtual llvm::Function *makeModuleDtorFunction() = 0; |
| 66 | }; |
| 67 | |
| 68 | /// Creates an instance of a CUDA runtime class. |
| 69 | CGCUDARuntime *CreateNVCUDARuntime(CodeGenModule &CGM); |
| 70 | |
| 71 | } |
| 72 | } |
| 73 | |
| 74 | #endif |
| 75 |