C++ (Cpp) CodeGenFunction::EmitBlockLiteral Examples

Example #1

File: CGOpenCLRuntime.cpp Project: PolyJIT/clang

CGOpenCLRuntime::EnqueuedBlockInfo
CGOpenCLRuntime::emitOpenCLEnqueuedBlock(CodeGenFunction &CGF, const Expr *E) {
  // The block literal may be assigned to a const variable. Chasing down
  // to get the block literal.
  if (auto DR = dyn_cast<DeclRefExpr>(E)) {
    E = cast<VarDecl>(DR->getDecl())->getInit();
  }
  if (auto Cast = dyn_cast<CastExpr>(E)) {
    E = Cast->getSubExpr();
  }
  auto *Block = cast<BlockExpr>(E);

  // The same block literal may be enqueued multiple times. Cache it if
  // possible.
  auto Loc = EnqueuedBlockMap.find(Block);
  if (Loc != EnqueuedBlockMap.end()) {
    return Loc->second;
  }

  // Emit block literal as a common block expression and get the block invoke
  // function.
  llvm::Function *Invoke;
  auto *V = CGF.EmitBlockLiteral(cast<BlockExpr>(Block), &Invoke);
  auto *F = CGF.getTargetHooks().createEnqueuedBlockKernel(
      CGF, Invoke, V->stripPointerCasts());

  // The common part of the post-processing of the kernel goes here.
  F->addFnAttr(llvm::Attribute::NoUnwind);
  F->setCallingConv(
      CGF.getTypes().ClangCallConvToLLVMCallConv(CallingConv::CC_OpenCLKernel));
  EnqueuedBlockInfo Info{F, V};
  EnqueuedBlockMap[Block] = Info;
  return Info;
}