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CGCUDARuntime.h
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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 
37 protected:
39 
40 public:
41  // Global variable properties that must be passed to CUDA runtime.
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.
70 
71 }
72 }
73 
74 #endif
ReturnValueSlot - Contains the address where the return value of a function can be stored...
Definition: CGCall.h:363
DominatorTree GraphTraits specialization so the DominatorTree can be iterable by generic graph iterat...
Definition: Dominators.h:29
constexpr XRayInstrMask Function
Definition: XRayInstr.h:38
Represents a variable declaration or definition.
Definition: Decl.h:812
CodeGenFunction - This class organizes the per-function state that is used while generating LLVM code...
RValue - This trivial value class is used to represent the result of an expression that is evaluated...
Definition: CGValue.h:38
FunctionArgList - Type for representing both the decl and type of parameters to a function...
Definition: CGCall.h:358
This class organizes the cross-function state that is used while generating LLVM code.
Dataflow Directional Tag Classes.
Represents a call to a CUDA kernel function.
Definition: ExprCXX.h:218
CGCUDARuntime * CreateNVCUDARuntime(CodeGenModule &CGM)
Creates an instance of a CUDA runtime class.
Definition: CGCUDANV.cpp:783
CGCUDARuntime(CodeGenModule &CGM)
Definition: CGCUDARuntime.h:47