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