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75 lines
2.2 KiB
75 lines
2.2 KiB
//===-- IR/Statepoint.cpp -- gc.statepoint utilities --- -----------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file contains some utility functions to help recognize gc.statepoint
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// intrinsics.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/IR/Statepoint.h"
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#include "llvm/IR/Function.h"
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using namespace llvm;
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static const Function *getCalledFunction(ImmutableCallSite CS) {
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if (!CS.getInstruction())
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return nullptr;
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return CS.getCalledFunction();
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}
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bool llvm::isStatepoint(ImmutableCallSite CS) {
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if (auto *F = getCalledFunction(CS))
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return F->getIntrinsicID() == Intrinsic::experimental_gc_statepoint;
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return false;
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}
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bool llvm::isStatepoint(const Value *V) {
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if (auto CS = ImmutableCallSite(V))
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return isStatepoint(CS);
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return false;
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}
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bool llvm::isStatepoint(const Value &V) {
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return isStatepoint(&V);
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}
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bool llvm::isGCRelocate(ImmutableCallSite CS) {
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return CS.getInstruction() && isa<GCRelocateInst>(CS.getInstruction());
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}
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bool llvm::isGCResult(ImmutableCallSite CS) {
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return CS.getInstruction() && isa<GCResultInst>(CS.getInstruction());
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}
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bool llvm::isStatepointDirectiveAttr(Attribute Attr) {
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return Attr.hasAttribute("statepoint-id") ||
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Attr.hasAttribute("statepoint-num-patch-bytes");
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}
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StatepointDirectives llvm::parseStatepointDirectivesFromAttrs(AttributeSet AS) {
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StatepointDirectives Result;
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Attribute AttrID =
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AS.getAttribute(AttributeSet::FunctionIndex, "statepoint-id");
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uint64_t StatepointID;
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if (AttrID.isStringAttribute())
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if (!AttrID.getValueAsString().getAsInteger(10, StatepointID))
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Result.StatepointID = StatepointID;
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uint32_t NumPatchBytes;
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Attribute AttrNumPatchBytes = AS.getAttribute(AttributeSet::FunctionIndex,
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"statepoint-num-patch-bytes");
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if (AttrNumPatchBytes.isStringAttribute())
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if (!AttrNumPatchBytes.getValueAsString().getAsInteger(10, NumPatchBytes))
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Result.NumPatchBytes = NumPatchBytes;
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return Result;
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}
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