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* Indent class into anonymous namespace, filling up the diff with garbage

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* Internalize global variables with initializers
* Add new stat to track global variable internalization
* Only count functions that were not internal before in internalized function
  count


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3163 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2002-07-30 19:48:44 +00:00
parent 5e1f7ec927
commit 55e41ba3d2
1 changed files with 40 additions and 27 deletions
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29
lib/Transforms/IPO/Internalize.cpp
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@ -1,25 +1,27 @@
//===-- Internalize.cpp - Mark functions internal -------------------------===// //===-- Internalize.cpp - Mark functions internal -------------------------===//
// //
// This pass loops over all of the functions in the input module, looking for a // This pass loops over all of the functions in the input module, looking for a
// main function. If a main function is found, all other functions are marked // main function. If a main function is found, all other functions and all
// as internal. // global variables with initializers are marked as internal.
// //
//===----------------------------------------------------------------------===// //===----------------------------------------------------------------------===//
#include "llvm/Transforms/IPO.h" #include "llvm/Transforms/IPO.h"
#include "llvm/Pass.h" #include "llvm/Pass.h"
#include "llvm/Module.h" #include "llvm/Module.h"
#include "llvm/Function.h"
#include "Support/StatisticReporter.h" #include "Support/StatisticReporter.h"
static Statistic<> NumChanged("internalize\t- Number of functions internal'd");
namespace { namespace {
Statistic<> NumFunctions("internalize\t- Number of functions internalized");
Statistic<> NumGlobals ("internalize\t- Number of global vars internalized");
class InternalizePass : public Pass { class InternalizePass : public Pass {
virtual bool run(Module &M) { virtual bool run(Module &M) {
bool FoundMain = false; // Look for a function named main... bool FoundMain = false; // Look for a function named main...
for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I) for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I)
if (I->getName() == "main" && !I->isExternal()) { if (I->getName() == "main" && !I->isExternal() &&
I->hasExternalLinkage()) {
FoundMain = true; FoundMain = true;
break; break;
} }
@ -31,10 +33,21 @@ class InternalizePass : public Pass {
// Found a main function, mark all functions not named main as internal. // Found a main function, mark all functions not named main as internal.
for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I) for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I)
if (I->getName() != "main" && // Leave the main function external if (I->getName() != "main" && // Leave the main function external
!I->isExternal()) { // Function must be defined here !I->isExternal() && // Function must be defined here
!I->hasInternalLinkage()) { // Can't already have internal linkage
I->setInternalLinkage(true); I->setInternalLinkage(true);
Changed = true; Changed = true;
++NumChanged; ++NumFunctions;
DEBUG(std::cerr << "Internalizing func " << I->getName() << "\n");
}
// Mark all global variables with initializers as internal as well...
for (Module::giterator I = M.gbegin(), E = M.gend(); I != E; ++I)
if (I->hasInitializer() && I->hasExternalLinkage()) {
I->setInternalLinkage(true);
Changed = true;
++NumGlobals;
DEBUG(std::cerr << "Internalizing gvar " << I->getName() << "\n");
} }
return Changed; return Changed;