6bb1cadd56
that builds the following additional llvm/clang tools: - bugpoint - llc - lli - llvm-ar - llvm-as - llvm-bcanalyzer - llvm-diff - llvm-dis - llvm-extract - llvm-ld - llvm-link - llvm-mc - llvm-nm - llvm-objdump - llvm-prof - llvm-ranlib - llvm-rtdyld - llvm-stub - macho-dump - opt These tools are mainly useful for people that want to manipulate llvm bitcode (.bc) and llvm assembly language (.ll) files, or want to tinker with llvm and clang themselves. MFC after: 2 weeks
95 lines
3.1 KiB
C++
95 lines
3.1 KiB
C++
//===- AnalysisWrappers.cpp - Wrappers around non-pass analyses -----------===//
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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 pass wrappers around LLVM analyses that don't make sense to
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// be passes. It provides a nice standard pass interface to these classes so
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// that they can be printed out by analyze.
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//
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// These classes are separated out of analyze.cpp so that it is more clear which
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// code is the integral part of the analyze tool, and which part of the code is
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// just making it so more passes are available.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Module.h"
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#include "llvm/Pass.h"
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#include "llvm/Support/CallSite.h"
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#include "llvm/Analysis/CallGraph.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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/// ExternalFunctionsPassedConstants - This pass prints out call sites to
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/// external functions that are called with constant arguments. This can be
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/// useful when looking for standard library functions we should constant fold
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/// or handle in alias analyses.
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struct ExternalFunctionsPassedConstants : public ModulePass {
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static char ID; // Pass ID, replacement for typeid
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ExternalFunctionsPassedConstants() : ModulePass(ID) {}
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virtual bool runOnModule(Module &M) {
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for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I) {
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if (!I->isDeclaration()) continue;
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bool PrintedFn = false;
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for (Value::use_iterator UI = I->use_begin(), E = I->use_end();
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UI != E; ++UI) {
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Instruction *User = dyn_cast<Instruction>(*UI);
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if (!User) continue;
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CallSite CS(cast<Value>(User));
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if (!CS) continue;
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for (CallSite::arg_iterator AI = CS.arg_begin(),
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E = CS.arg_end(); AI != E; ++AI) {
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if (!isa<Constant>(*AI)) continue;
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if (!PrintedFn) {
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errs() << "Function '" << I->getName() << "':\n";
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PrintedFn = true;
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}
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errs() << *User;
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break;
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}
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}
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}
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return false;
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}
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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 ExternalFunctionsPassedConstants::ID = 0;
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static RegisterPass<ExternalFunctionsPassedConstants>
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P1("print-externalfnconstants",
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"Print external fn callsites passed constants");
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namespace {
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struct CallGraphPrinter : public ModulePass {
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static char ID; // Pass ID, replacement for typeid
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CallGraphPrinter() : ModulePass(ID) {}
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virtual void getAnalysisUsage(AnalysisUsage &AU) const {
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AU.setPreservesAll();
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AU.addRequiredTransitive<CallGraph>();
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}
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virtual bool runOnModule(Module &M) {
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getAnalysis<CallGraph>().print(errs(), &M);
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return false;
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}
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};
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}
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char CallGraphPrinter::ID = 0;
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static RegisterPass<CallGraphPrinter>
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P2("print-callgraph", "Print a call graph");
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