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
17namespace llvm {
18class Function;
19}
20
21namespace 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.
34bool stripUnknownAttributes(llvm::Function &F);
35
36}  // namespace slang
37