mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-23 11:13:28 +01:00
78 lines
2.9 KiB
C++
78 lines
2.9 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 with the isa/dyncast family of functions. In particular, this
|
|
// allows you to do things like:
|
|
//
|
|
// if (DbgStopPointInst *SPI = dyn_cast<DbgStopPointInst>(Inst))
|
|
// ... SPI->getFileName() ... SPI->getDirectory() ...
|
|
//
|
|
// 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);
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
/// DbgStopPointInst - This represents the llvm.dbg.stoppoint instruction.
|
|
///
|
|
|
|
Value *DbgStopPointInst::getFileName() const {
|
|
// Once the operand indices are verified, update this assert
|
|
assert(LLVMDebugVersion == (7 << 16) && "Verify operand indices");
|
|
GlobalVariable *GV = cast<GlobalVariable>(getContext());
|
|
if (!GV->hasInitializer()) return NULL;
|
|
ConstantStruct *CS = cast<ConstantStruct>(GV->getInitializer());
|
|
return CS->getOperand(3);
|
|
}
|
|
|
|
Value *DbgStopPointInst::getDirectory() const {
|
|
// Once the operand indices are verified, update this assert
|
|
assert(LLVMDebugVersion == (7 << 16) && "Verify operand indices");
|
|
GlobalVariable *GV = cast<GlobalVariable>(getContext());
|
|
if (!GV->hasInitializer()) return NULL;
|
|
ConstantStruct *CS = cast<ConstantStruct>(GV->getInitializer());
|
|
return CS->getOperand(4);
|
|
}
|