1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
|
//===- TypeMetadataUtils.h - Utilities related to type metadata --*- C++ -*-==//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file contains functions that make it easier to manipulate type metadata
// for devirtualization.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_ANALYSIS_TYPEMETADATAUTILS_H
#define LLVM_ANALYSIS_TYPEMETADATAUTILS_H
#include "llvm/ADT/SmallVector.h"
#include "llvm/IR/CallSite.h"
namespace llvm {
class DominatorTree;
/// The type of CFI jumptable needed for a function.
enum CfiFunctionLinkage {
CFL_Definition = 0,
CFL_Declaration = 1,
CFL_WeakDeclaration = 2
};
/// A call site that could be devirtualized.
struct DevirtCallSite {
/// The offset from the address point to the virtual function.
uint64_t Offset;
/// The call site itself.
CallSite CS;
};
/// Given a call to the intrinsic \@llvm.type.test, find all devirtualizable
/// call sites based on the call and return them in DevirtCalls.
void findDevirtualizableCallsForTypeTest(
SmallVectorImpl<DevirtCallSite> &DevirtCalls,
SmallVectorImpl<CallInst *> &Assumes, const CallInst *CI,
DominatorTree &DT);
/// Given a call to the intrinsic \@llvm.type.checked.load, find all
/// devirtualizable call sites based on the call and return them in DevirtCalls.
void findDevirtualizableCallsForTypeCheckedLoad(
SmallVectorImpl<DevirtCallSite> &DevirtCalls,
SmallVectorImpl<Instruction *> &LoadedPtrs,
SmallVectorImpl<Instruction *> &Preds, bool &HasNonCallUses,
const CallInst *CI, DominatorTree &DT);
Constant *getPointerAtOffset(Constant *I, uint64_t Offset, Module &M);
}
#endif
|
