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//===-- IR/Statepoint.cpp -- gc.statepoint utilities --- -----------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file contains some utility functions to help recognize gc.statepoint
// intrinsics.
//
//===----------------------------------------------------------------------===//
#include "llvm/IR/Statepoint.h"
#include "llvm/IR/Function.h"
using namespace llvm;
static const Function *getCalledFunction(ImmutableCallSite CS) {
if (!CS.getInstruction())
return nullptr;
return CS.getCalledFunction();
}
bool llvm::isStatepoint(ImmutableCallSite CS) {
if (auto *F = getCalledFunction(CS))
return F->getIntrinsicID() == Intrinsic::experimental_gc_statepoint;
return false;
}
bool llvm::isStatepoint(const Value *V) {
if (auto CS = ImmutableCallSite(V))
return isStatepoint(CS);
return false;
}
bool llvm::isStatepoint(const Value &V) {
return isStatepoint(&V);
}
bool llvm::isGCRelocate(ImmutableCallSite CS) {
return CS.getInstruction() && isa<GCRelocateInst>(CS.getInstruction());
}
bool llvm::isGCRelocate(const Value *V) {
if (auto CS = ImmutableCallSite(V))
return isGCRelocate(CS);
return false;
}
bool llvm::isGCResult(ImmutableCallSite CS) {
return CS.getInstruction() && isa<GCResultInst>(CS.getInstruction());
}
bool llvm::isGCResult(const Value *V) {
if (auto CS = ImmutableCallSite(V))
return isGCResult(CS);
return false;
}
bool llvm::isStatepointDirectiveAttr(Attribute Attr) {
return Attr.hasAttribute("statepoint-id") ||
Attr.hasAttribute("statepoint-num-patch-bytes");
}
StatepointDirectives
llvm::parseStatepointDirectivesFromAttrs(AttributeList AS) {
StatepointDirectives Result;
Attribute AttrID =
AS.getAttribute(AttributeList::FunctionIndex, "statepoint-id");
uint64_t StatepointID;
if (AttrID.isStringAttribute())
if (!AttrID.getValueAsString().getAsInteger(10, StatepointID))
Result.StatepointID = StatepointID;
uint32_t NumPatchBytes;
Attribute AttrNumPatchBytes = AS.getAttribute(AttributeList::FunctionIndex,
"statepoint-num-patch-bytes");
if (AttrNumPatchBytes.isStringAttribute())
if (!AttrNumPatchBytes.getValueAsString().getAsInteger(10, NumPatchBytes))
Result.NumPatchBytes = NumPatchBytes;
return Result;
}
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