1 /* 2 * Copyright 2017, The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 namespace llvm { 18 class Function; 19 } 20 21 namespace slang { 22 23 // Remove any readnone/readonly attributes from function parameters, 24 // and remove any argmemonly attributes from functions. 25 // 26 // Jellybean's LLVM version didn't support readnone/readonly as anything 27 // other than function attributes, so it will fail verification otherwise. 28 // Since we never ran the verifier in Jellybean, it ends up with potential 29 // crashes deeper in CodeGen. 30 // 31 // Similarly, older LLVM versions don't support argmemonly as a function 32 // attribute, and so it can trigger an llvm_unreachable assertion when 33 // we attempt to write out bitcode. 34 bool stripUnknownAttributes(llvm::Function &F); 35 36 } // namespace slang 37
