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
36  eval.begin(CGF);
37  CGF.EmitBlock(ConfigOKBlock);
38
39  const Decl *TargetDecl = 0;
40  if (const ImplicitCastExpr *CE = dyn_cast<ImplicitCastExpr>(E->getCallee())) {
41    if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(CE->getSubExpr())) {
42      TargetDecl = DRE->getDecl();
43    }
44  }
45
46  llvm::Value *Callee = CGF.EmitScalarExpr(E->getCallee());
47  CGF.EmitCall(E->getCallee()->getType(), Callee, ReturnValue,
48               E->arg_begin(), E->arg_end(), TargetDecl);
49  CGF.EmitBranch(ContBlock);
50
51  CGF.EmitBlock(ContBlock);
52  eval.end(CGF);
53
54  return RValue::get(0);
55}
56