1249259Sdim//===-- InstrinsicInst.cpp - Intrinsic Instruction Wrappers -----*- C++ -*-===// 2249259Sdim// 3249259Sdim// The LLVM Compiler Infrastructure 4249259Sdim// 5249259Sdim// This file is distributed under the University of Illinois Open Source 6249259Sdim// License. See LICENSE.TXT for details. 7249259Sdim// 8249259Sdim//===----------------------------------------------------------------------===// 9249259Sdim// 10249259Sdim// This file implements methods that make it really easy to deal with intrinsic 11249259Sdim// functions. 12249259Sdim// 13249259Sdim// All intrinsic function calls are instances of the call instruction, so these 14249259Sdim// are all subclasses of the CallInst class. Note that none of these classes 15249259Sdim// has state or virtual methods, which is an important part of this gross/neat 16249259Sdim// hack working. 17249259Sdim// 18249259Sdim// In some cases, arguments to intrinsics need to be generic and are defined as 19249259Sdim// type pointer to empty struct { }*. To access the real item of interest the 20249259Sdim// cast instruction needs to be stripped away. 21249259Sdim// 22249259Sdim//===----------------------------------------------------------------------===// 23249259Sdim 24249259Sdim#include "llvm/IR/IntrinsicInst.h" 25249259Sdim#include "llvm/IR/Constants.h" 26249259Sdim#include "llvm/IR/GlobalVariable.h" 27249259Sdim#include "llvm/IR/Metadata.h" 28249259Sdimusing namespace llvm; 29249259Sdim 30249259Sdim//===----------------------------------------------------------------------===// 31249259Sdim/// DbgInfoIntrinsic - This is the common base class for debug info intrinsics 32249259Sdim/// 33249259Sdim 34249259Sdimstatic Value *CastOperand(Value *C) { 35249259Sdim if (ConstantExpr *CE = dyn_cast<ConstantExpr>(C)) 36249259Sdim if (CE->isCast()) 37249259Sdim return CE->getOperand(0); 38249259Sdim return NULL; 39249259Sdim} 40249259Sdim 41249259SdimValue *DbgInfoIntrinsic::StripCast(Value *C) { 42249259Sdim if (Value *CO = CastOperand(C)) { 43249259Sdim C = StripCast(CO); 44249259Sdim } else if (GlobalVariable *GV = dyn_cast<GlobalVariable>(C)) { 45249259Sdim if (GV->hasInitializer()) 46249259Sdim if (Value *CO = CastOperand(GV->getInitializer())) 47249259Sdim C = StripCast(CO); 48249259Sdim } 49249259Sdim return dyn_cast<GlobalVariable>(C); 50249259Sdim} 51249259Sdim 52249259Sdim//===----------------------------------------------------------------------===// 53249259Sdim/// DbgDeclareInst - This represents the llvm.dbg.declare instruction. 54249259Sdim/// 55249259Sdim 56249259SdimValue *DbgDeclareInst::getAddress() const { 57249259Sdim if (MDNode* MD = cast_or_null<MDNode>(getArgOperand(0))) 58249259Sdim return MD->getOperand(0); 59249259Sdim else 60249259Sdim return NULL; 61249259Sdim} 62249259Sdim 63249259Sdim//===----------------------------------------------------------------------===// 64249259Sdim/// DbgValueInst - This represents the llvm.dbg.value instruction. 65249259Sdim/// 66249259Sdim 67249259Sdimconst Value *DbgValueInst::getValue() const { 68249259Sdim return cast<MDNode>(getArgOperand(0))->getOperand(0); 69249259Sdim} 70249259Sdim 71249259SdimValue *DbgValueInst::getValue() { 72249259Sdim return cast<MDNode>(getArgOperand(0))->getOperand(0); 73249259Sdim} 74