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6df60a9eff
Break the "IncludeFile" mechanism into its own header file and adjust other files accordingly. Use this facility for the IntrinsicInst problem which was the subject of PR800. More to follow on this. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28709 91177308-0d34-0410-b5e6-96231b3b80d8
78 lines
2.9 KiB
C++
78 lines
2.9 KiB
C++
//===-- InstrinsicInst.cpp - Intrinsic Instruction Wrappers -----*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by James M. Laskey and is distributed under
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// the University of Illinois Open Source License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements methods that make it really easy to deal with intrinsic
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// functions with the isa/dyncast family of functions. In particular, this
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// allows you to do things like:
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//
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// if (DbgStopPointInst *SPI = dyn_cast<DbgStopPointInst>(Inst))
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// ... SPI->getFileName() ... SPI->getDirectory() ...
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//
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// All intrinsic function calls are instances of the call instruction, so these
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// are all subclasses of the CallInst class. Note that none of these classes
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// has state or virtual methods, which is an important part of this gross/neat
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// hack working.
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//
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// In some cases, arguments to intrinsics need to be generic and are defined as
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// type pointer to empty struct { }*. To access the real item of interest the
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// cast instruction needs to be stripped away.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/IntrinsicInst.h"
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#include "llvm/Constants.h"
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#include "llvm/GlobalVariable.h"
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using namespace llvm;
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//===----------------------------------------------------------------------===//
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/// DbgInfoIntrinsic - This is the common base class for debug info intrinsics
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///
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static Value *CastOperand(Value *C) {
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if (ConstantExpr *CE = dyn_cast<ConstantExpr>(C))
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if (CE->getOpcode() == Instruction::Cast)
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return CE->getOperand(0);
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return NULL;
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}
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Value *DbgInfoIntrinsic::StripCast(Value *C) {
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if (Value *CO = CastOperand(C)) {
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C = StripCast(CO);
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} else if (GlobalVariable *GV = dyn_cast<GlobalVariable>(C)) {
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if (GV->hasInitializer())
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if (Value *CO = CastOperand(GV->getInitializer()))
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C = StripCast(CO);
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}
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return dyn_cast<GlobalVariable>(C);
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}
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//===----------------------------------------------------------------------===//
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/// DbgStopPointInst - This represents the llvm.dbg.stoppoint instruction.
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///
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std::string DbgStopPointInst::getFileName() const {
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GlobalVariable *GV = cast<GlobalVariable>(getContext());
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ConstantStruct *CS = cast<ConstantStruct>(GV->getInitializer());
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return CS->getOperand(4)->getStringValue();
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}
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std::string DbgStopPointInst::getDirectory() const {
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GlobalVariable *GV = cast<GlobalVariable>(getContext());
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ConstantStruct *CS = cast<ConstantStruct>(GV->getInitializer());
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return CS->getOperand(5)->getStringValue();
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}
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//===----------------------------------------------------------------------===//
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/// LinkIntrinsicInstStub -- This is a hack to make sure that programs that
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/// #include IntrinsicInst.h also link this file. See Support/IncludeFile.h
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/// for further details.
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char llvm::LinkIntrinsicInstStub;
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