1//===----- CGCUDARuntime.cpp - Interface to CUDA Runtimes -----------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This provides an abstract class for CUDA code generation.  Concrete
11// subclasses of this implement code generation for specific CUDA
12// runtime libraries.
13//
14//===----------------------------------------------------------------------===//
15
16#include "CGCUDARuntime.h"
17#include "CGCall.h"
18#include "CodeGenFunction.h"
19#include "clang/AST/Decl.h"
20#include "clang/AST/ExprCXX.h"
21
22using namespace clang;
23using namespace CodeGen;
24
25CGCUDARuntime::~CGCUDARuntime() {}
26
27RValue CGCUDARuntime::EmitCUDAKernelCallExpr(CodeGenFunction &CGF,
28                                             const CUDAKernelCallExpr *E,
29                                             ReturnValueSlot ReturnValue) {
30  llvm::BasicBlock *ConfigOKBlock = CGF.createBasicBlock("kcall.configok");
31  llvm::BasicBlock *ContBlock = CGF.createBasicBlock("kcall.end");
32
33  CodeGenFunction::ConditionalEvaluation eval(CGF);
34  CGF.EmitBranchOnBoolExpr(E->getConfig(), ContBlock, ConfigOKBlock,
35                           /*TrueCount=*/0);
36
37  eval.begin(CGF);
38  CGF.EmitBlock(ConfigOKBlock);
39
40  const Decl *TargetDecl = nullptr;
41  if (const ImplicitCastExpr *CE = dyn_cast<ImplicitCastExpr>(E->getCallee())) {
42    if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(CE->getSubExpr())) {
43      TargetDecl = DRE->getDecl();
44    }
45  }
46
47  llvm::Value *Callee = CGF.EmitScalarExpr(E->getCallee());
48  CGF.EmitCall(E->getCallee()->getType(), Callee, E->getLocStart(),
49               ReturnValue, E->arg_begin(), E->arg_end(), TargetDecl);
50  CGF.EmitBranch(ContBlock);
51
52  CGF.EmitBlock(ContBlock);
53  eval.end(CGF);
54
55  return RValue::get(nullptr);
56}
57