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 
18 using namespace llvm;
19 
20 bool llvm::isStatepoint(const CallBase *Call) {
21   return isa<GCStatepointInst>(Call);
22 }
23 
24 bool llvm::isStatepoint(const Value *V) {
25   return isa<GCStatepointInst>(V);
26 }
27 
28 bool llvm::isStatepoint(const Value &V) {
29   return isStatepoint(&V);
30 }
31 
32 bool llvm::isGCRelocate(const CallBase *Call) {
33   return isa<GCRelocateInst>(Call);
34 }
35 
36 bool llvm::isGCRelocate(const Value *V) {
37   if (auto *Call = dyn_cast<CallBase>(V))
38     return isGCRelocate(Call);
39   return false;
40 }
41 
42 bool llvm::isGCResult(const CallBase *Call) { return isa<GCResultInst>(Call); }
43 
44 bool llvm::isGCResult(const Value *V) {
45   if (auto *Call = dyn_cast<CallBase>(V))
46     return isGCResult(Call);
47   return false;
48 }
49 
50 bool llvm::isStatepointDirectiveAttr(Attribute Attr) {
51   return Attr.hasAttribute("statepoint-id") ||
52          Attr.hasAttribute("statepoint-num-patch-bytes");
53 }
54 
55 StatepointDirectives
56 llvm::parseStatepointDirectivesFromAttrs(AttributeList AS) {
57   StatepointDirectives Result;
58 
59   Attribute AttrID =
60       AS.getAttribute(AttributeList::FunctionIndex, "statepoint-id");
61   uint64_t StatepointID;
62   if (AttrID.isStringAttribute())
63     if (!AttrID.getValueAsString().getAsInteger(10, StatepointID))
64       Result.StatepointID = StatepointID;
65 
66   uint32_t NumPatchBytes;
67   Attribute AttrNumPatchBytes = AS.getAttribute(AttributeList::FunctionIndex,
68                                                 "statepoint-num-patch-bytes");
69   if (AttrNumPatchBytes.isStringAttribute())
70     if (!AttrNumPatchBytes.getValueAsString().getAsInteger(10, NumPatchBytes))
71       Result.NumPatchBytes = NumPatchBytes;
72 
73   return Result;
74 }
75