llvm/lib/IR/Statepoint.cpp

   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::isStatepointDirectiveAttr(Attribute Attr) {
  21   return Attr.hasAttribute("statepoint-id") ||
  22          Attr.hasAttribute("statepoint-num-patch-bytes");
  23 }
  24
  25 StatepointDirectives
  26 llvm::parseStatepointDirectivesFromAttrs(AttributeList AS) {
  27   StatepointDirectives Result;
  28
  29   Attribute AttrID = AS.getFnAttr("statepoint-id");
  30   uint64_t StatepointID;
  31   if (AttrID.isStringAttribute())
  32     if (!AttrID.getValueAsString().getAsInteger(10, StatepointID))
  33       Result.StatepointID = StatepointID;
  34
  35   uint32_t NumPatchBytes;
  36   Attribute AttrNumPatchBytes = AS.getFnAttr("statepoint-num-patch-bytes");
  37   if (AttrNumPatchBytes.isStringAttribute())
  38     if (!AttrNumPatchBytes.getValueAsString().getAsInteger(10, NumPatchBytes))
  39       Result.NumPatchBytes = NumPatchBytes;
  40
  41   return Result;
  42 }