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 isStatepoint(const CallBase * Call)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 isStatepoint(const Value * V)26bool llvm::isStatepoint(const Value *V) { 27 if (auto *Call = dyn_cast<CallBase>(V)) 28 return isStatepoint(Call); 29 return false; 30 } 31 isStatepoint(const Value & V)32bool llvm::isStatepoint(const Value &V) { 33 return isStatepoint(&V); 34 } 35 isGCRelocate(const CallBase * Call)36bool llvm::isGCRelocate(const CallBase *Call) { 37 return isa<GCRelocateInst>(Call); 38 } 39 isGCRelocate(const Value * V)40bool llvm::isGCRelocate(const Value *V) { 41 if (auto *Call = dyn_cast<CallBase>(V)) 42 return isGCRelocate(Call); 43 return false; 44 } 45 isGCResult(const CallBase * Call)46bool llvm::isGCResult(const CallBase *Call) { return isa<GCResultInst>(Call); } 47 isGCResult(const Value * V)48bool llvm::isGCResult(const Value *V) { 49 if (auto *Call = dyn_cast<CallBase>(V)) 50 return isGCResult(Call); 51 return false; 52 } 53 isStatepointDirectiveAttr(Attribute Attr)54bool llvm::isStatepointDirectiveAttr(Attribute Attr) { 55 return Attr.hasAttribute("statepoint-id") || 56 Attr.hasAttribute("statepoint-num-patch-bytes"); 57 } 58 59 StatepointDirectives parseStatepointDirectivesFromAttrs(AttributeList AS)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