llvm-6502/lib/VMCore/IntrinsicInst.cpp
Victor Hernandez 3a32865d58 Improve llvm.dbg.declare intrinsic by referring directly to the storage in its first argument, via function-local metadata (instead of via a bitcast).
This patch also cleans up code that expects there to be a bitcast in the first argument and testcases that call llvm.dbg.declare.
It also strips old llvm.dbg.declare intrinsics that did not pass metadata as the first argument.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93531 91177308-0d34-0410-b5e6-96231b3b80d8
2010-01-15 19:04:09 +00:00

75 lines
2.4 KiB
C++

//===-- InstrinsicInst.cpp - Intrinsic Instruction Wrappers -----*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements methods that make it really easy to deal with intrinsic
// functions.
//
// All intrinsic function calls are instances of the call instruction, so these
// are all subclasses of the CallInst class. Note that none of these classes
// has state or virtual methods, which is an important part of this gross/neat
// hack working.
//
// In some cases, arguments to intrinsics need to be generic and are defined as
// type pointer to empty struct { }*. To access the real item of interest the
// cast instruction needs to be stripped away.
//
//===----------------------------------------------------------------------===//
#include "llvm/IntrinsicInst.h"
#include "llvm/Constants.h"
#include "llvm/GlobalVariable.h"
#include "llvm/Analysis/ValueTracking.h"
#include "llvm/CodeGen/MachineModuleInfo.h"
using namespace llvm;
//===----------------------------------------------------------------------===//
/// DbgInfoIntrinsic - This is the common base class for debug info intrinsics
///
static Value *CastOperand(Value *C) {
if (ConstantExpr *CE = dyn_cast<ConstantExpr>(C))
if (CE->isCast())
return CE->getOperand(0);
return NULL;
}
Value *DbgInfoIntrinsic::StripCast(Value *C) {
if (Value *CO = CastOperand(C)) {
C = StripCast(CO);
} else if (GlobalVariable *GV = dyn_cast<GlobalVariable>(C)) {
if (GV->hasInitializer())
if (Value *CO = CastOperand(GV->getInitializer()))
C = StripCast(CO);
}
return dyn_cast<GlobalVariable>(C);
}
//===----------------------------------------------------------------------===//
/// DbgDeclareInst - This represents the llvm.dbg.declare instruction.
///
Value *DbgDeclareInst::getAddress() const {
if (MDNode* MD = cast_or_null<MDNode>(getOperand(1)))
return MD->getOperand(0);
else
return NULL;
}
//===----------------------------------------------------------------------===//
/// DbgValueInst - This represents the llvm.dbg.value instruction.
///
const Value *DbgValueInst::getValue() const {
return cast<MDNode>(getOperand(1))->getOperand(0);
}
Value *DbgValueInst::getValue() {
return cast<MDNode>(getOperand(1))->getOperand(0);
}