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4c1f3c24db
into their new header subdirectory: include/llvm/IR. This matches the directory structure of lib, and begins to correct a long standing point of file layout clutter in LLVM. There are still more header files to move here, but I wanted to handle them in separate commits to make tracking what files make sense at each layer easier. The only really questionable files here are the target intrinsic tablegen files. But that's a battle I'd rather not fight today. I've updated both CMake and Makefile build systems (I think, and my tests think, but I may have missed something). I've also re-sorted the includes throughout the project. I'll be committing updates to Clang, DragonEgg, and Polly momentarily. llvm-svn: 171366
113 lines
3.9 KiB
C++
113 lines
3.9 KiB
C++
//===- PrintSCC.cpp - Enumerate SCCs in some key graphs -------------------===//
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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 provides passes to print out SCCs in a CFG or a CallGraph.
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// Normally, you would not use these passes; instead, you would use the
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// scc_iterator directly to enumerate SCCs and process them in some way. These
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// passes serve three purposes:
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//
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// (1) As a reference for how to use the scc_iterator.
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// (2) To print out the SCCs for a CFG or a CallGraph:
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// analyze -print-cfg-sccs to print the SCCs in each CFG of a module.
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// analyze -print-cfg-sccs -stats to print the #SCCs and the maximum SCC size.
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// analyze -print-cfg-sccs -debug > /dev/null to watch the algorithm in action.
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//
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// and similarly:
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// analyze -print-callgraph-sccs [-stats] [-debug] to print SCCs in the CallGraph
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//
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// (3) To test the scc_iterator.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/ADT/SCCIterator.h"
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#include "llvm/Analysis/CallGraph.h"
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#include "llvm/IR/Module.h"
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#include "llvm/Pass.h"
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#include "llvm/Support/CFG.h"
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#include "llvm/Support/raw_ostream.h"
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using namespace llvm;
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namespace {
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struct CFGSCC : public FunctionPass {
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static char ID; // Pass identification, replacement for typeid
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CFGSCC() : FunctionPass(ID) {}
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bool runOnFunction(Function& func);
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void print(raw_ostream &O, 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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struct CallGraphSCC : public ModulePass {
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static char ID; // Pass identification, replacement for typeid
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CallGraphSCC() : ModulePass(ID) {}
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// run - Print out SCCs in the call graph for the specified module.
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bool runOnModule(Module &M);
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void print(raw_ostream &O, const Module* = 0) const { }
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// getAnalysisUsage - This pass requires the CallGraph.
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virtual void getAnalysisUsage(AnalysisUsage &AU) const {
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AU.setPreservesAll();
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AU.addRequired<CallGraph>();
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}
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};
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}
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char CFGSCC::ID = 0;
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static RegisterPass<CFGSCC>
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Y("print-cfg-sccs", "Print SCCs of each function CFG");
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char CallGraphSCC::ID = 0;
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static RegisterPass<CallGraphSCC>
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Z("print-callgraph-sccs", "Print SCCs of the Call Graph");
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bool CFGSCC::runOnFunction(Function &F) {
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unsigned sccNum = 0;
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errs() << "SCCs for Function " << F.getName() << " in PostOrder:";
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for (scc_iterator<Function*> SCCI = scc_begin(&F),
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E = scc_end(&F); SCCI != E; ++SCCI) {
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std::vector<BasicBlock*> &nextSCC = *SCCI;
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errs() << "\nSCC #" << ++sccNum << " : ";
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for (std::vector<BasicBlock*>::const_iterator I = nextSCC.begin(),
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E = nextSCC.end(); I != E; ++I)
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errs() << (*I)->getName() << ", ";
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if (nextSCC.size() == 1 && SCCI.hasLoop())
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errs() << " (Has self-loop).";
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}
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errs() << "\n";
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return true;
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}
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// run - Print out SCCs in the call graph for the specified module.
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bool CallGraphSCC::runOnModule(Module &M) {
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CallGraphNode* rootNode = getAnalysis<CallGraph>().getRoot();
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unsigned sccNum = 0;
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errs() << "SCCs for the program in PostOrder:";
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for (scc_iterator<CallGraphNode*> SCCI = scc_begin(rootNode),
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E = scc_end(rootNode); SCCI != E; ++SCCI) {
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const std::vector<CallGraphNode*> &nextSCC = *SCCI;
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errs() << "\nSCC #" << ++sccNum << " : ";
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for (std::vector<CallGraphNode*>::const_iterator I = nextSCC.begin(),
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E = nextSCC.end(); I != E; ++I)
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errs() << ((*I)->getFunction() ? (*I)->getFunction()->getName()
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: "external node") << ", ";
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if (nextSCC.size() == 1 && SCCI.hasLoop())
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errs() << " (Has self-loop).";
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}
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errs() << "\n";
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return true;
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}
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