//
// 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 is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
//
//===----------------------------------------------------------------------===//
+#define DEBUG_TYPE "internalize"
#include "llvm/Transforms/IPO.h"
#include "llvm/Pass.h"
#include "llvm/Module.h"
#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/Compiler.h"
#include "llvm/Support/Debug.h"
#include "llvm/ADT/Statistic.h"
#include <fstream>
-#include <iostream>
#include <set>
using namespace llvm;
+STATISTIC(NumFunctions, "Number of functions internalized");
+STATISTIC(NumGlobals , "Number of global vars internalized");
+
namespace {
- Statistic<> NumFunctions("internalize", "Number of functions internalized");
- Statistic<> NumGlobals ("internalize", "Number of global vars internalized");
// APIFile - A file which contains a list of symbols that should not be marked
// external.
cl::desc("A list of symbol names to preserve"),
cl::CommaSeparated);
- class InternalizePass : public ModulePass {
+ class VISIBILITY_HIDDEN InternalizePass : public ModulePass {
std::set<std::string> ExternalNames;
bool DontInternalize;
public:
- InternalizePass(bool InternalizeEverything = true);
- InternalizePass(const std::vector <const char *>& exportList);
+ static char ID; // Pass identification, replacement for typeid
+ explicit InternalizePass(bool InternalizeEverything = true);
+ explicit InternalizePass(const std::vector <const char *>& exportList);
void LoadFile(const char *Filename);
virtual bool runOnModule(Module &M);
};
+ char InternalizePass::ID = 0;
RegisterPass<InternalizePass> X("internalize", "Internalize Global Symbols");
} // end anonymous namespace
InternalizePass::InternalizePass(bool InternalizeEverything)
- : DontInternalize(false){
+ : ModulePass((intptr_t)&ID), DontInternalize(false){
if (!APIFile.empty()) // If a filename is specified, use it
LoadFile(APIFile.c_str());
else if (!APIList.empty()) // Else, if a list is specified, use it.
DontInternalize = true;
}
-InternalizePass::InternalizePass(const std::vector<const char *>&exportList) {
+InternalizePass::InternalizePass(const std::vector<const char *>&exportList)
+ : ModulePass((intptr_t)&ID), DontInternalize(false){
for(std::vector<const char *>::const_iterator itr = exportList.begin();
- itr != exportList.end(); itr++) {
+ itr != exportList.end(); itr++) {
ExternalNames.insert(*itr);
}
}
// Load the APIFile...
std::ifstream In(Filename);
if (!In.good()) {
- std::cerr << "WARNING: Internalize couldn't load file '" << Filename
- << "'!\n";
+ cerr << "WARNING: Internalize couldn't load file '" << Filename << "'!\n";
return; // Do not internalize anything...
}
while (In) {
// internalize the module, it must be a library or something.
//
if (ExternalNames.empty()) {
- Function *MainFunc = M.getMainFunction();
- if (MainFunc == 0 || MainFunc->isExternal())
+ Function *MainFunc = M.getFunction("main");
+ if (MainFunc == 0 || MainFunc->isDeclaration())
return false; // No main found, must be a library...
// Preserve main, internalize all else.
// Found a main function, mark all functions not named main as internal.
for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I)
- if (!I->isExternal() && // Function must be defined here
+ if (!I->isDeclaration() && // Function must be defined here
!I->hasInternalLinkage() && // Can't already have internal linkage
!ExternalNames.count(I->getName())) {// Not marked to keep external?
I->setLinkage(GlobalValue::InternalLinkage);
Changed = true;
++NumFunctions;
- DEBUG(std::cerr << "Internalizing func " << I->getName() << "\n");
+ DOUT << "Internalizing func " << I->getName() << "\n";
}
// Never internalize the llvm.used symbol. It is used to implement
// attribute((used)).
ExternalNames.insert("llvm.used");
- // Never internalize anchors used by the debugger, else the debugger won't
- // find them. (see MachineDebugInfo.)
+ // Never internalize anchors used by the machine module info, else the info
+ // won't find them. (see MachineModuleInfo.)
ExternalNames.insert("llvm.dbg.compile_units");
ExternalNames.insert("llvm.dbg.global_variables");
ExternalNames.insert("llvm.dbg.subprograms");
+ ExternalNames.insert("llvm.global_ctors");
+ ExternalNames.insert("llvm.global_dtors");
+ ExternalNames.insert("llvm.noinline");
+ ExternalNames.insert("llvm.global.annotations");
// Mark all global variables with initializers as internal as well.
for (Module::global_iterator I = M.global_begin(), E = M.global_end();
I != E; ++I)
- if (!I->isExternal() && !I->hasInternalLinkage() &&
+ if (!I->isDeclaration() && !I->hasInternalLinkage() &&
!ExternalNames.count(I->getName())) {
- // Special case handling of the global ctor and dtor list. When we
- // internalize it, we mark it constant, which allows elimination of
- // the list if it's empty.
- //
- if (I->hasAppendingLinkage() && (I->getName() == "llvm.global_ctors" ||
- I->getName() == "llvm.global_dtors")) {
- // If the global ctors/dtors list has no uses, do not internalize it, as
- // there is no __main in this program, so the asmprinter should handle
- // it.
- if (I->use_empty()) continue;
-
- // Otherwise, also mark the list constant, as we know that it will not
- // be mutated any longer, and the makes simple IPO xforms automatically
- // better.
- I->setConstant(true);
- }
-
I->setLinkage(GlobalValue::InternalLinkage);
Changed = true;
++NumGlobals;
- DEBUG(std::cerr << "Internalized gvar " << I->getName() << "\n");
+ DOUT << "Internalized gvar " << I->getName() << "\n";
}
return Changed;
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