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b934722f1b
* Add new RegisterOpt/RegisterAnalysis templates for registering passes that are to show up in opt or analyze * Register Analyses now * Change optimizations to use RegisterOpt instead of RegisterPass * Add support for different "PassType's" * Add new RegisterOpt/RegisterAnalysis templates for registering passes that are to show up in opt or analyze * Register Analyses now * Change optimizations to use RegisterOpt instead of RegisterPass * Remove getPassName implementations from various subclasses llvm-svn: 3112
50 lines
1.5 KiB
C++
50 lines
1.5 KiB
C++
//===-- Internalize.cpp - Mark functions internal -------------------------===//
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//
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// This pass loops over all of the functions in the input module, looking for a
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// main function. If a main function is found, all other functions are marked
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// as internal.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Transforms/IPO.h"
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#include "llvm/Pass.h"
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#include "llvm/Module.h"
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#include "llvm/Function.h"
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#include "Support/StatisticReporter.h"
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static Statistic<> NumChanged("internalize\t- Number of functions internal'd");
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namespace {
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class InternalizePass : public Pass {
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virtual bool run(Module &M) {
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bool FoundMain = false; // Look for a function named main...
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for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I)
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if (I->getName() == "main" && !I->isExternal()) {
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FoundMain = true;
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break;
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}
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if (!FoundMain) return false; // No main found, must be a library...
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bool Changed = false;
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// Found a main function, mark all functions not named main as internal.
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for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I)
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if (I->getName() != "main" && // Leave the main function external
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!I->isExternal()) { // Function must be defined here
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I->setInternalLinkage(true);
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Changed = true;
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++NumChanged;
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}
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return Changed;
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}
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};
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RegisterOpt<InternalizePass> X("internalize", "Internalize Functions");
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} // end anonymous namespace
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Pass *createInternalizePass() {
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return new InternalizePass();
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}
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