Method GetPackedValidityBitValue

cpp/src/gandiva/llvm_generator.cc:472–479

Return value of a bit in validity bitMap (handles null bitmaps too).

/// Return value of a bit in validity bitMap (handles null bitmaps too).
llvm::Value* LLVMGenerator::GetPackedValidityBitValue(llvm::Value* bitmap,
                                                      llvm::Value* position) {
  ADD_TRACE("fetch validity bit at position %T", position);

  llvm::Value* bitmap8 = ir_builder()->CreateBitCast(
      bitmap, types()->ptr_type(types()->i8_type()), "bitMapCast");
  return AddFunctionCall("bitMapValidityGetBit", types()->i1_type(), {bitmap8, position});
}

/// Clear the bit in bitMap if value = false.
void LLVMGenerator::ClearPackedBitValueIfFalse(llvm::Value* bitmap, llvm::Value* position,