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
22 using namespace clang;
23 using namespace CodeGen;
24
~CGCUDARuntime()25 CGCUDARuntime::~CGCUDARuntime() {}
26
EmitCUDAKernelCallExpr(CodeGenFunction & CGF,const CUDAKernelCallExpr * E,ReturnValueSlot ReturnValue)27 RValue 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, ReturnValue, TargetDecl);
49 CGF.EmitBranch(ContBlock);
50
51 CGF.EmitBlock(ContBlock);
52 eval.end(CGF);
53
54 return RValue::get(nullptr);
55 }
56