mirror of
https://github.com/c64scene-ar/llvm-6502.git
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0b8c9a80f2
into their new header subdirectory: include/llvm/IR. This matches the directory structure of lib, and begins to correct a long standing point of file layout clutter in LLVM. There are still more header files to move here, but I wanted to handle them in separate commits to make tracking what files make sense at each layer easier. The only really questionable files here are the target intrinsic tablegen files. But that's a battle I'd rather not fight today. I've updated both CMake and Makefile build systems (I think, and my tests think, but I may have missed something). I've also re-sorted the includes throughout the project. I'll be committing updates to Clang, DragonEgg, and Polly momentarily. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171366 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/IR/Constants.h"
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#include "llvm/IR/Instructions.h"
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#include "llvm/IR/LLVMContext.h"
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#include "llvm/IR/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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