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