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c10fa6c801
http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20120130/136146.html Implemented CaseIterator and it solves almost all described issues: we don't need to mix operand/case/successor indexing anymore. Base iterator class is implemented as a template since it may be initialized either from "const SwitchInst*" or from "SwitchInst*". ConstCaseIt is just a read-only iterator. CaseIt is read-write iterator; it allows to change case successor and case value. Usage of iterator allows totally remove resolveXXXX methods. All indexing convertions done automatically inside the iterator's getters. Main way of iterator usage looks like this: SwitchInst *SI = ... // intialize it somehow for (SwitchInst::CaseIt i = SI->caseBegin(), e = SI->caseEnd(); i != e; ++i) { BasicBlock *BB = i.getCaseSuccessor(); ConstantInt *V = i.getCaseValue(); // Do something. } If you want to convert case number to TerminatorInst successor index, just use getSuccessorIndex iterator's method. If you want initialize iterator from TerminatorInst successor index, use CaseIt::fromSuccessorIndex(...) method. There are also related changes in llvm-clients: klee and clang. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@152297 91177308-0d34-0410-b5e6-96231b3b80d8
115 lines
3.5 KiB
C++
115 lines
3.5 KiB
C++
//===-- CFGPrinter.h - CFG printer external interface -----------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines external functions that can be called to explicitly
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// instantiate the CFG printer.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_ANALYSIS_CFGPRINTER_H
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#define LLVM_ANALYSIS_CFGPRINTER_H
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#include "llvm/Constants.h"
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#include "llvm/Function.h"
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#include "llvm/Instructions.h"
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#include "llvm/Assembly/Writer.h"
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#include "llvm/Support/CFG.h"
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#include "llvm/Support/GraphWriter.h"
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namespace llvm {
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template<>
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struct DOTGraphTraits<const Function*> : public DefaultDOTGraphTraits {
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DOTGraphTraits (bool isSimple=false) : DefaultDOTGraphTraits(isSimple) {}
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static std::string getGraphName(const Function *F) {
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return "CFG for '" + F->getName().str() + "' function";
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}
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static std::string getSimpleNodeLabel(const BasicBlock *Node,
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const Function *) {
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if (!Node->getName().empty())
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return Node->getName().str();
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std::string Str;
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raw_string_ostream OS(Str);
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WriteAsOperand(OS, Node, false);
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return OS.str();
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}
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static std::string getCompleteNodeLabel(const BasicBlock *Node,
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const Function *) {
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std::string Str;
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raw_string_ostream OS(Str);
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if (Node->getName().empty()) {
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WriteAsOperand(OS, Node, false);
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OS << ":";
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}
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OS << *Node;
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std::string OutStr = OS.str();
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if (OutStr[0] == '\n') OutStr.erase(OutStr.begin());
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// Process string output to make it nicer...
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for (unsigned i = 0; i != OutStr.length(); ++i)
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if (OutStr[i] == '\n') { // Left justify
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OutStr[i] = '\\';
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OutStr.insert(OutStr.begin()+i+1, 'l');
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} else if (OutStr[i] == ';') { // Delete comments!
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unsigned Idx = OutStr.find('\n', i+1); // Find end of line
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OutStr.erase(OutStr.begin()+i, OutStr.begin()+Idx);
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--i;
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}
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return OutStr;
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}
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std::string getNodeLabel(const BasicBlock *Node,
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const Function *Graph) {
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if (isSimple())
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return getSimpleNodeLabel(Node, Graph);
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else
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return getCompleteNodeLabel(Node, Graph);
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}
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static std::string getEdgeSourceLabel(const BasicBlock *Node,
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succ_const_iterator I) {
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// Label source of conditional branches with "T" or "F"
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if (const BranchInst *BI = dyn_cast<BranchInst>(Node->getTerminator()))
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if (BI->isConditional())
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return (I == succ_begin(Node)) ? "T" : "F";
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// Label source of switch edges with the associated value.
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if (const SwitchInst *SI = dyn_cast<SwitchInst>(Node->getTerminator())) {
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unsigned SuccNo = I.getSuccessorIndex();
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if (SuccNo == 0) return "def";
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std::string Str;
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raw_string_ostream OS(Str);
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SwitchInst::ConstCaseIt Case =
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SwitchInst::ConstCaseIt::fromSuccessorIndex(SI, SuccNo);
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OS << Case.getCaseValue()->getValue();
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return OS.str();
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}
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return "";
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}
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};
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} // End llvm namespace
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namespace llvm {
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class FunctionPass;
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FunctionPass *createCFGPrinterPass ();
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FunctionPass *createCFGOnlyPrinterPass ();
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} // End llvm namespace
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#endif
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