| /* |
| * Copyright 2015, The Android Open Source Project |
| * |
| * Licensed 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. |
| */ |
| |
| #ifndef BCC_RS_UTILS_H |
| #define BCC_RS_UTILS_H |
| |
| #include "rsDefines.h" |
| |
| #include <llvm/IR/Type.h> |
| #include <llvm/IR/DerivedTypes.h> |
| #include <llvm/ADT/StringRef.h> |
| |
| #include <string> |
| |
| namespace { |
| |
| static inline llvm::StringRef getUnsuffixedStructName(const llvm::StructType *T) { |
| #ifdef _DEBUG |
| // Bug: 22926131 |
| // When building with assertions enabled, LLVM cannot read the name of a |
| // literal (anonymous) structure, because they shouldn't actually ever have |
| // a name. Unfortunately, due to past definitions of RenderScript object |
| // types as anonymous structures typedef-ed to their proper typename, |
| // we had been relying on accessing this information. LLVM bitcode retains |
| // the typedef-ed name for such anonymous structures. There is a |
| // corresponding (safe) fix to the RenderScript headers to actually name |
| // these types the same as their typedef name to simplify things. That |
| // fixes this issue going forward, but it won't allow us to compile legacy |
| // code properly. In that case, we just have non-assert builds ignore the |
| // fact that anonymous structures shouldn't have their name read, and do it |
| // anyway. Note that RSCompilerDriver.cpp checks the compiler version |
| // number (from llvm-rs-cc) to ensure that we are only ever building modern |
| // code when we have assertions enabled. Legacy code can only be compiled |
| // correctly with a non-asserting compiler. |
| // |
| // Note that the whole reason for looking at the "unsuffixed" name of the |
| // type is because LLVM suffixes duplicate typedefs of the same anonymous |
| // structure. In the new case, where all of the RS object types have a |
| // proper name, they won't have a dotted suffix at all. We still need |
| // to look at the old unsuffixed version to handle legacy code properly. |
| if (T->isLiteral()) { |
| return ""; |
| } |
| #endif |
| |
| // Get just the object type name with no suffix. |
| size_t LastDot = T->getName().rfind('.'); |
| if (LastDot == strlen("struct")) { |
| // If we get back to just the "struct" part, we know that we had a |
| // raw typename (i.e. struct.rs_element with no ".[0-9]+" suffix on it. |
| // In that case, we will want to create our slice such that it contains |
| // the entire name. |
| LastDot = T->getName().size(); |
| } |
| return T->getStructName().slice(0, LastDot); |
| } |
| |
| const char kAllocationTypeName[] = "struct.rs_allocation"; |
| const char kElementTypeName[] = "struct.rs_element"; |
| const char kSamplerTypeName[] = "struct.rs_sampler"; |
| const char kScriptTypeName[] = "struct.rs_script"; |
| const char kTypeTypeName[] = "struct.rs_type"; |
| |
| // Returns the RsDataType for a given input LLVM type. |
| // This is only used to distinguish the associated RS object types (i.e. |
| // rs_allocation, rs_element, rs_sampler, rs_script, and rs_type). |
| // All other types are reported back as RS_TYPE_NONE, since no special |
| // handling would be necessary. |
| static inline enum RsDataType getRsDataTypeForType(const llvm::Type *T) { |
| if (T->isStructTy()) { |
| const llvm::StringRef StructName = getUnsuffixedStructName(llvm::dyn_cast<const llvm::StructType>(T)); |
| if (StructName.equals(kAllocationTypeName)) { |
| return RS_TYPE_ALLOCATION; |
| } else if (StructName.equals(kElementTypeName)) { |
| return RS_TYPE_ELEMENT; |
| } else if (StructName.equals(kSamplerTypeName)) { |
| return RS_TYPE_SAMPLER; |
| } else if (StructName.equals(kScriptTypeName)) { |
| return RS_TYPE_SCRIPT; |
| } else if (StructName.equals(kTypeTypeName)) { |
| return RS_TYPE_TYPE; |
| } |
| } |
| return RS_TYPE_NONE; |
| } |
| |
| // Returns true if the input type is one of our RenderScript object types |
| // (allocation, element, sampler, script, type) and false if it is not. |
| static inline bool isRsObjectType(const llvm::Type *T) { |
| return getRsDataTypeForType(T) != RS_TYPE_NONE; |
| } |
| |
| } // end namespace |
| |
| // When we have a general reduction kernel with no combiner function, |
| // we will synthesize a combiner function from the accumulator |
| // function. Given the accumulator function name, what should be the |
| // name of the combiner function? |
| static inline std::string nameReduceCombinerFromAccumulator(llvm::StringRef accumName) { |
| return std::string(accumName) + ".combiner"; |
| } |
| |
| #endif // BCC_RS_UTILS_H |