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1 //===-- IR/Statepoint.cpp -- gc.statepoint utilities --- -----------------===//
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2 //
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3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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4 // See https://llvm.org/LICENSE.txt for license information.
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5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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6 //
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7 //===----------------------------------------------------------------------===//
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8 //
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9 // This file contains some utility functions to help recognize gc.statepoint
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10 // intrinsics.
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11 //
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12 //===----------------------------------------------------------------------===//
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13
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14 #include "llvm/IR/Statepoint.h"
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15
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16 #include "llvm/IR/Function.h"
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17
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18 using namespace llvm;
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19
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20 bool llvm::isStatepoint(const CallBase *Call) {
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21 if (auto *F = Call->getCalledFunction())
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22 return F->getIntrinsicID() == Intrinsic::experimental_gc_statepoint;
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23 return false;
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24 }
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25
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26 bool llvm::isStatepoint(const Value *V) {
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27 if (auto *Call = dyn_cast<CallBase>(V))
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28 return isStatepoint(Call);
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29 return false;
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30 }
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31
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32 bool llvm::isStatepoint(const Value &V) {
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33 return isStatepoint(&V);
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34 }
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35
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36 bool llvm::isGCRelocate(const CallBase *Call) {
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37 return isa<GCRelocateInst>(Call);
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38 }
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39
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40 bool llvm::isGCRelocate(const Value *V) {
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41 if (auto *Call = dyn_cast<CallBase>(V))
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42 return isGCRelocate(Call);
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43 return false;
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44 }
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45
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46 bool llvm::isGCResult(const CallBase *Call) { return isa<GCResultInst>(Call); }
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47
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48 bool llvm::isGCResult(const Value *V) {
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49 if (auto *Call = dyn_cast<CallBase>(V))
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50 return isGCResult(Call);
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51 return false;
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52 }
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53
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54 bool llvm::isStatepointDirectiveAttr(Attribute Attr) {
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55 return Attr.hasAttribute("statepoint-id") ||
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56 Attr.hasAttribute("statepoint-num-patch-bytes");
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57 }
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58
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59 StatepointDirectives
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60 llvm::parseStatepointDirectivesFromAttrs(AttributeList AS) {
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61 StatepointDirectives Result;
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62
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63 Attribute AttrID =
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64 AS.getAttribute(AttributeList::FunctionIndex, "statepoint-id");
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65 uint64_t StatepointID;
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66 if (AttrID.isStringAttribute())
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67 if (!AttrID.getValueAsString().getAsInteger(10, StatepointID))
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68 Result.StatepointID = StatepointID;
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69
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70 uint32_t NumPatchBytes;
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71 Attribute AttrNumPatchBytes = AS.getAttribute(AttributeList::FunctionIndex,
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72 "statepoint-num-patch-bytes");
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73 if (AttrNumPatchBytes.isStringAttribute())
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74 if (!AttrNumPatchBytes.getValueAsString().getAsInteger(10, NumPatchBytes))
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75 Result.NumPatchBytes = NumPatchBytes;
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76
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77 return Result;
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78 }
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