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must be called in the pass's constructor. This function uses static dependency declarations to recursively initialize the pass's dependencies. Clients that only create passes through the createFooPass() APIs will require no changes. Clients that want to use the CommandLine options for passes will need to manually call the appropriate initialization functions in PassInitialization.h before parsing commandline arguments. I have tested this with all standard configurations of clang and llvm-gcc on Darwin. It is possible that there are problems with the static dependencies that will only be visible with non-standard options. If you encounter any crash in pass registration/creation, please send the testcase to me directly. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116820 91177308-0d34-0410-b5e6-96231b3b80d8
166 lines
4.9 KiB
C++
166 lines
4.9 KiB
C++
//===- CFGPrinter.cpp - DOT printer for the control flow graph ------------===//
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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 a '-dot-cfg' analysis pass, which emits the
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// cfg.<fnname>.dot file for each function in the program, with a graph of the
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// CFG for that function.
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//
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// The other main feature of this file is that it implements the
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// Function::viewCFG method, which is useful for debugging passes which operate
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// on the CFG.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Analysis/CFGPrinter.h"
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#include "llvm/Pass.h"
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using namespace llvm;
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namespace {
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struct CFGViewer : public FunctionPass {
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static char ID; // Pass identifcation, replacement for typeid
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CFGViewer() : FunctionPass(ID) {
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initializeCFGOnlyViewerPass(*PassRegistry::getPassRegistry());
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}
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virtual bool runOnFunction(Function &F) {
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F.viewCFG();
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return false;
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}
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void print(raw_ostream &OS, const Module* = 0) const {}
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virtual void getAnalysisUsage(AnalysisUsage &AU) const {
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AU.setPreservesAll();
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}
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};
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}
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char CFGViewer::ID = 0;
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INITIALIZE_PASS(CFGViewer, "view-cfg", "View CFG of function", false, true)
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namespace {
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struct CFGOnlyViewer : public FunctionPass {
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static char ID; // Pass identifcation, replacement for typeid
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CFGOnlyViewer() : FunctionPass(ID) {
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initializeCFGOnlyViewerPass(*PassRegistry::getPassRegistry());
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}
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virtual bool runOnFunction(Function &F) {
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F.viewCFGOnly();
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return false;
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}
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void print(raw_ostream &OS, const Module* = 0) const {}
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virtual void getAnalysisUsage(AnalysisUsage &AU) const {
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AU.setPreservesAll();
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}
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};
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}
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char CFGOnlyViewer::ID = 0;
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INITIALIZE_PASS(CFGOnlyViewer, "view-cfg-only",
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"View CFG of function (with no function bodies)", false, true)
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namespace {
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struct CFGPrinter : public FunctionPass {
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static char ID; // Pass identification, replacement for typeid
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CFGPrinter() : FunctionPass(ID) {
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initializeCFGPrinterPass(*PassRegistry::getPassRegistry());
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}
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virtual bool runOnFunction(Function &F) {
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std::string Filename = "cfg." + F.getNameStr() + ".dot";
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errs() << "Writing '" << Filename << "'...";
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std::string ErrorInfo;
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raw_fd_ostream File(Filename.c_str(), ErrorInfo);
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if (ErrorInfo.empty())
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WriteGraph(File, (const Function*)&F);
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else
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errs() << " error opening file for writing!";
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errs() << "\n";
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return false;
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}
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void print(raw_ostream &OS, const Module* = 0) const {}
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virtual void getAnalysisUsage(AnalysisUsage &AU) const {
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AU.setPreservesAll();
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}
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};
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}
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char CFGPrinter::ID = 0;
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INITIALIZE_PASS(CFGPrinter, "dot-cfg", "Print CFG of function to 'dot' file",
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false, true)
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namespace {
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struct CFGOnlyPrinter : public FunctionPass {
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static char ID; // Pass identification, replacement for typeid
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CFGOnlyPrinter() : FunctionPass(ID) {
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initializeCFGOnlyPrinterPass(*PassRegistry::getPassRegistry());
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}
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virtual bool runOnFunction(Function &F) {
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std::string Filename = "cfg." + F.getNameStr() + ".dot";
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errs() << "Writing '" << Filename << "'...";
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std::string ErrorInfo;
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raw_fd_ostream File(Filename.c_str(), ErrorInfo);
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if (ErrorInfo.empty())
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WriteGraph(File, (const Function*)&F, true);
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else
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errs() << " error opening file for writing!";
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errs() << "\n";
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return false;
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}
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void print(raw_ostream &OS, const Module* = 0) const {}
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virtual void getAnalysisUsage(AnalysisUsage &AU) const {
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AU.setPreservesAll();
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}
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};
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}
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char CFGOnlyPrinter::ID = 0;
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INITIALIZE_PASS(CFGOnlyPrinter, "dot-cfg-only",
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"Print CFG of function to 'dot' file (with no function bodies)",
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false, true)
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/// viewCFG - This function is meant for use from the debugger. You can just
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/// say 'call F->viewCFG()' and a ghostview window should pop up from the
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/// program, displaying the CFG of the current function. This depends on there
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/// being a 'dot' and 'gv' program in your path.
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///
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void Function::viewCFG() const {
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ViewGraph(this, "cfg" + getNameStr());
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}
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/// viewCFGOnly - This function is meant for use from the debugger. It works
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/// just like viewCFG, but it does not include the contents of basic blocks
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/// into the nodes, just the label. If you are only interested in the CFG t
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/// his can make the graph smaller.
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///
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void Function::viewCFGOnly() const {
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ViewGraph(this, "cfg" + getNameStr(), true);
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}
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FunctionPass *llvm::createCFGPrinterPass () {
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return new CFGPrinter();
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}
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FunctionPass *llvm::createCFGOnlyPrinterPass () {
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return new CFGOnlyPrinter();
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}
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