mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-17 18:31:04 +00:00
3da94aec4d
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21428 91177308-0d34-0410-b5e6-96231b3b80d8
68 lines
2.5 KiB
C++
68 lines
2.5 KiB
C++
//===- AnalysisWrappers.cpp - Wrappers around non-pass analyses -----------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file was developed by the LLVM research group and is distributed under
|
|
// the University of Illinois Open Source License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file defines pass wrappers around LLVM analyses that don't make sense to
|
|
// be passes. It provides a nice standard pass interface to these classes so
|
|
// that they can be printed out by analyze.
|
|
//
|
|
// These classes are separated out of analyze.cpp so that it is more clear which
|
|
// code is the integral part of the analyze tool, and which part of the code is
|
|
// just making it so more passes are available.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/Module.h"
|
|
#include "llvm/Pass.h"
|
|
#include "llvm/Support/CallSite.h"
|
|
#include <iostream>
|
|
using namespace llvm;
|
|
|
|
namespace {
|
|
/// ExternalFunctionsPassedConstants - This pass prints out call sites to
|
|
/// external functions that are called with constant arguments. This can be
|
|
/// useful when looking for standard library functions we should constant fold
|
|
/// or handle in alias analyses.
|
|
struct ExternalFunctionsPassedConstants : public ModulePass {
|
|
virtual bool runOnModule(Module &M) {
|
|
for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I)
|
|
if (I->isExternal()) {
|
|
bool PrintedFn = false;
|
|
for (Value::use_iterator UI = I->use_begin(), E = I->use_end();
|
|
UI != E; ++UI)
|
|
if (Instruction *User = dyn_cast<Instruction>(*UI)) {
|
|
CallSite CS = CallSite::get(User);
|
|
if (CS.getInstruction()) {
|
|
for (CallSite::arg_iterator AI = CS.arg_begin(),
|
|
E = CS.arg_end(); AI != E; ++AI)
|
|
if (isa<Constant>(*AI)) {
|
|
if (!PrintedFn) {
|
|
std::cerr << "Function '" << I->getName() << "':\n";
|
|
PrintedFn = true;
|
|
}
|
|
std::cerr << *User;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
void print(std::ostream &OS) const {}
|
|
|
|
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
|
|
AU.setPreservesAll();
|
|
}
|
|
};
|
|
|
|
RegisterAnalysis<ExternalFunctionsPassedConstants>
|
|
P2("externalfnconstants", "Print external fn callsites passed constants");
|
|
}
|