| // Licensed to the Apache Software Foundation (ASF) under one |
| // or more contributor license agreements. See the NOTICE file |
| // distributed with this work for additional information |
| // regarding copyright ownership. The ASF licenses this file |
| // to you under the Apache License, Version 2.0 (the |
| // "License"); you may not use this file except in compliance |
| // with the License. You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, |
| // software distributed under the License is distributed on an |
| // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| // KIND, either express or implied. See the License for the |
| // specific language governing permissions and limitations |
| // under the License. |
| |
| #include "codegen/codegen-util.h" |
| |
| #include <cctype> |
| |
| #include "common/names.h" |
| |
| using std::isdigit; |
| |
| namespace impala { |
| |
| llvm::CallInst* CodeGenUtil::CreateCallWithBitCasts(LlvmBuilder* builder, |
| llvm::Function* callee, llvm::ArrayRef<llvm::Value*> args, const llvm::Twine& name) { |
| vector<llvm::Value*> bitcast_args; |
| bitcast_args.reserve(args.size()); |
| llvm::Function::arg_iterator fn_arg = callee->arg_begin(); |
| for (llvm::Value* arg : args) { |
| bitcast_args.push_back( |
| CheckedBitCast(builder, arg, fn_arg->getType(), "create_call_bitcast")); |
| ++fn_arg; |
| } |
| return builder->CreateCall(callee, bitcast_args, name); |
| } |
| |
| llvm::Value* CodeGenUtil::CheckedBitCast(LlvmBuilder* builder, llvm::Value* value, |
| llvm::Type* dst_type, const llvm::Twine& name) { |
| DCHECK(TypesAreStructurallyIdentical(value->getType(), dst_type)) |
| << Print(value->getType()) << " " << Print(dst_type); |
| return builder->CreateBitCast(value, dst_type, name); |
| } |
| |
| bool CodeGenUtil::TypesAreStructurallyIdentical(llvm::Type* t1, llvm::Type* t2) { |
| // All primitive types are deduplicated by LLVM, so we can just compare the pointers. |
| if (t1 == t2) return true; |
| // Derived types are structurally identical if they are the same kind of compound type |
| // and the elements are structurally identical. Check to see which of the Type |
| // subclasses t1 belongs to. |
| if (t1->isPointerTy()) { |
| if (!t2->isPointerTy()) return false; |
| } else if (t1->isStructTy()) { |
| if (!t2->isStructTy()) return false; |
| } else if (t1->isArrayTy()) { |
| if (!t2->isArrayTy()) return false; |
| } else if (t1->isFunctionTy()) { |
| if (!t2->isFunctionTy()) return false; |
| } else { |
| DCHECK(t1->isVectorTy()) << Print(t1); |
| if (!t2->isVectorTy()) return false; |
| } |
| if (t1->getNumContainedTypes() != t2->getNumContainedTypes()) return false; |
| for (int i = 0; i < t1->getNumContainedTypes(); ++i) { |
| if (!TypesAreStructurallyIdentical( |
| t1->getContainedType(i), t2->getContainedType(i))) { |
| return false; |
| } |
| } |
| return true; |
| } |
| } |