mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-14 11:32:34 +00:00
d04a8d4b33
Sooooo many of these had incorrect or strange main module includes. I have manually inspected all of these, and fixed the main module include to be the nearest plausible thing I could find. If you own or care about any of these source files, I encourage you to take some time and check that these edits were sensible. I can't have broken anything (I strictly added headers, and reordered them, never removed), but they may not be the headers you'd really like to identify as containing the API being implemented. Many forward declarations and missing includes were added to a header files to allow them to parse cleanly when included first. The main module rule does in fact have its merits. =] git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169131 91177308-0d34-0410-b5e6-96231b3b80d8
136 lines
4.3 KiB
C++
136 lines
4.3 KiB
C++
//===-- ExtractGV.cpp - Global Value extraction pass ----------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This pass extracts global values
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Transforms/IPO.h"
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#include "llvm/ADT/SetVector.h"
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#include "llvm/Constants.h"
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#include "llvm/Instructions.h"
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#include "llvm/LLVMContext.h"
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#include "llvm/Module.h"
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#include "llvm/Pass.h"
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#include <algorithm>
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using namespace llvm;
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namespace {
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/// @brief A pass to extract specific functions and their dependencies.
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class GVExtractorPass : public ModulePass {
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SetVector<GlobalValue *> Named;
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bool deleteStuff;
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public:
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static char ID; // Pass identification, replacement for typeid
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/// FunctionExtractorPass - If deleteFn is true, this pass deletes as the
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/// specified function. Otherwise, it deletes as much of the module as
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/// possible, except for the function specified.
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///
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explicit GVExtractorPass(std::vector<GlobalValue*>& GVs, bool deleteS = true)
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: ModulePass(ID), Named(GVs.begin(), GVs.end()), deleteStuff(deleteS) {}
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bool runOnModule(Module &M) {
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// Visit the global inline asm.
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if (!deleteStuff)
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M.setModuleInlineAsm("");
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// For simplicity, just give all GlobalValues ExternalLinkage. A trickier
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// implementation could figure out which GlobalValues are actually
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// referenced by the Named set, and which GlobalValues in the rest of
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// the module are referenced by the NamedSet, and get away with leaving
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// more internal and private things internal and private. But for now,
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// be conservative and simple.
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// Visit the GlobalVariables.
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for (Module::global_iterator I = M.global_begin(), E = M.global_end();
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I != E; ++I) {
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bool Delete =
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deleteStuff == (bool)Named.count(I) && !I->isDeclaration();
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if (!Delete) {
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if (I->hasAvailableExternallyLinkage())
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continue;
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if (I->getName() == "llvm.global_ctors")
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continue;
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}
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bool Local = I->hasLocalLinkage();
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if (Local)
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I->setVisibility(GlobalValue::HiddenVisibility);
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if (Local || Delete)
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I->setLinkage(GlobalValue::ExternalLinkage);
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if (Delete)
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I->setInitializer(0);
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}
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// Visit the Functions.
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for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I) {
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bool Delete =
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deleteStuff == (bool)Named.count(I) && !I->isDeclaration();
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if (!Delete) {
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if (I->hasAvailableExternallyLinkage())
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continue;
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}
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bool Local = I->hasLocalLinkage();
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if (Local)
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I->setVisibility(GlobalValue::HiddenVisibility);
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if (Local || Delete)
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I->setLinkage(GlobalValue::ExternalLinkage);
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if (Delete)
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I->deleteBody();
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}
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// Visit the Aliases.
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for (Module::alias_iterator I = M.alias_begin(), E = M.alias_end();
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I != E;) {
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Module::alias_iterator CurI = I;
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++I;
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if (CurI->hasLocalLinkage()) {
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CurI->setVisibility(GlobalValue::HiddenVisibility);
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CurI->setLinkage(GlobalValue::ExternalLinkage);
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}
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if (deleteStuff == (bool)Named.count(CurI)) {
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Type *Ty = CurI->getType()->getElementType();
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CurI->removeFromParent();
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llvm::Value *Declaration;
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if (FunctionType *FTy = dyn_cast<FunctionType>(Ty)) {
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Declaration = Function::Create(FTy, GlobalValue::ExternalLinkage,
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CurI->getName(), &M);
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} else {
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Declaration =
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new GlobalVariable(M, Ty, false, GlobalValue::ExternalLinkage,
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0, CurI->getName());
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}
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CurI->replaceAllUsesWith(Declaration);
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delete CurI;
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}
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}
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return true;
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}
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};
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char GVExtractorPass::ID = 0;
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}
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ModulePass *llvm::createGVExtractionPass(std::vector<GlobalValue*>& GVs,
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bool deleteFn) {
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return new GVExtractorPass(GVs, deleteFn);
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}
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