1 | //===- MemoryBuiltinsTest.cpp - Tests for utilities in MemoryBuiltins.h ---===// |
2 | // |
3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
4 | // See https://llvm.org/LICENSE.txt for license information. |
5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
6 | // |
7 | //===----------------------------------------------------------------------===// |
8 | |
9 | #include "llvm/Analysis/MemoryBuiltins.h" |
10 | #include "llvm/IR/Attributes.h" |
11 | #include "llvm/IR/Constants.h" |
12 | #include "llvm/IR/Function.h" |
13 | #include "llvm/IR/LLVMContext.h" |
14 | #include "llvm/IR/Module.h" |
15 | #include "gtest/gtest.h" |
16 | |
17 | using namespace llvm; |
18 | |
19 | namespace { |
20 | // allocsize should not imply that a function is a traditional allocation |
21 | // function (e.g. that can be optimized out/...); it just tells us how many |
22 | // bytes exist at the pointer handed back by the function. |
23 | TEST(AllocSize, AllocationBuiltinsTest) { |
24 | LLVMContext Context; |
25 | Module M("" , Context); |
26 | IntegerType *ArgTy = Type::getInt32Ty(C&: Context); |
27 | |
28 | Function *AllocSizeFn = Function::Create( |
29 | Ty: FunctionType::get(Result: PointerType::getUnqual(C&: Context), Params: {ArgTy}, isVarArg: false), |
30 | Linkage: GlobalValue::ExternalLinkage, N: "F" , M: &M); |
31 | |
32 | AllocSizeFn->addFnAttr( |
33 | Attr: Attribute::getWithAllocSizeArgs(Context, ElemSizeArg: 1, NumElemsArg: std::nullopt)); |
34 | |
35 | // 100 is arbitrary. |
36 | std::unique_ptr<CallInst> Caller( |
37 | CallInst::Create(Func: AllocSizeFn, Args: {ConstantInt::get(Ty: ArgTy, V: 100)})); |
38 | |
39 | const TargetLibraryInfo *TLI = nullptr; |
40 | EXPECT_FALSE(isAllocLikeFn(Caller.get(), TLI)); |
41 | |
42 | // FIXME: We might be able to treat allocsize functions as general allocation |
43 | // functions. |
44 | EXPECT_FALSE(isAllocationFn(Caller.get(), TLI)); |
45 | } |
46 | } |
47 | |