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For details, See: docs/2002-06-25-MegaPatchInfo.txt git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2778 91177308-0d34-0410-b5e6-96231b3b80d8
48 lines
1.5 KiB
C++
48 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/Internalize.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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class InternalizePass : public Pass {
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const char *getPassName() const { return "Internalize Functions"; }
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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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Pass *createInternalizePass() {
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return new InternalizePass();
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}
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