1//===-- IR/Statepoint.cpp -- gc.statepoint utilities ---  -----------------===//
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// This file contains some utility functions to help recognize gc.statepoint
10// intrinsics.
11//
12//===----------------------------------------------------------------------===//
13
14#include "llvm/IR/Statepoint.h"
15
16#include "llvm/IR/Function.h"
17
18using namespace llvm;
19
20bool llvm::isStatepoint(const CallBase *Call) {
21  if (auto *F = Call->getCalledFunction())
22    return F->getIntrinsicID() == Intrinsic::experimental_gc_statepoint;
23  return false;
24}
25
26bool llvm::isStatepoint(const Value *V) {
27  if (auto *Call = dyn_cast<CallBase>(V))
28    return isStatepoint(Call);
29  return false;
30}
31
32bool llvm::isStatepoint(const Value &V) {
33  return isStatepoint(&V);
34}
35
36bool llvm::isGCRelocate(const CallBase *Call) {
37  return isa<GCRelocateInst>(Call);
38}
39
40bool llvm::isGCRelocate(const Value *V) {
41  if (auto *Call = dyn_cast<CallBase>(V))
42    return isGCRelocate(Call);
43  return false;
44}
45
46bool llvm::isGCResult(const CallBase *Call) { return isa<GCResultInst>(Call); }
47
48bool llvm::isGCResult(const Value *V) {
49  if (auto *Call = dyn_cast<CallBase>(V))
50    return isGCResult(Call);
51  return false;
52}
53
54bool llvm::isStatepointDirectiveAttr(Attribute Attr) {
55  return Attr.hasAttribute("statepoint-id") ||
56         Attr.hasAttribute("statepoint-num-patch-bytes");
57}
58
59StatepointDirectives
60llvm::parseStatepointDirectivesFromAttrs(AttributeList AS) {
61  StatepointDirectives Result;
62
63  Attribute AttrID =
64      AS.getAttribute(AttributeList::FunctionIndex, "statepoint-id");
65  uint64_t StatepointID;
66  if (AttrID.isStringAttribute())
67    if (!AttrID.getValueAsString().getAsInteger(10, StatepointID))
68      Result.StatepointID = StatepointID;
69
70  uint32_t NumPatchBytes;
71  Attribute AttrNumPatchBytes = AS.getAttribute(AttributeList::FunctionIndex,
72                                                "statepoint-num-patch-bytes");
73  if (AttrNumPatchBytes.isStringAttribute())
74    if (!AttrNumPatchBytes.getValueAsString().getAsInteger(10, NumPatchBytes))
75      Result.NumPatchBytes = NumPatchBytes;
76
77  return Result;
78}
79