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4b51f99c87
This was always part of the VMCore library out of necessity -- it deals entirely in the IR. The .cpp file in fact was already part of the VMCore library. This is just a mechanical move. I've tried to go through and re-apply the coding standard's preferred header sort, but at 40-ish files, I may have gotten some wrong. Please let me know if so. I'll be committing the corresponding updates to Clang and Polly, and Duncan has DragonEgg. Thanks to Bill and Eric for giving the green light for this bit of cleanup. llvm-svn: 159421
65 lines
2.3 KiB
C++
65 lines
2.3 KiB
C++
//===-- ModuleUtils.cpp - Functions to manipulate Modules -----------------===//
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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 family of functions perform manipulations on Modules.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Transforms/Utils/ModuleUtils.h"
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#include "llvm/DerivedTypes.h"
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#include "llvm/Function.h"
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#include "llvm/IRBuilder.h"
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#include "llvm/Module.h"
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using namespace llvm;
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static void appendToGlobalArray(const char *Array,
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Module &M, Function *F, int Priority) {
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IRBuilder<> IRB(M.getContext());
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FunctionType *FnTy = FunctionType::get(IRB.getVoidTy(), false);
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StructType *Ty = StructType::get(
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IRB.getInt32Ty(), PointerType::getUnqual(FnTy), NULL);
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Constant *RuntimeCtorInit = ConstantStruct::get(
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Ty, IRB.getInt32(Priority), F, NULL);
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// Get the current set of static global constructors and add the new ctor
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// to the list.
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SmallVector<Constant *, 16> CurrentCtors;
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if (GlobalVariable * GVCtor = M.getNamedGlobal(Array)) {
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if (Constant *Init = GVCtor->getInitializer()) {
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unsigned n = Init->getNumOperands();
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CurrentCtors.reserve(n + 1);
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for (unsigned i = 0; i != n; ++i)
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CurrentCtors.push_back(cast<Constant>(Init->getOperand(i)));
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}
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GVCtor->eraseFromParent();
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}
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CurrentCtors.push_back(RuntimeCtorInit);
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// Create a new initializer.
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ArrayType *AT = ArrayType::get(RuntimeCtorInit->getType(),
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CurrentCtors.size());
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Constant *NewInit = ConstantArray::get(AT, CurrentCtors);
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// Create the new global variable and replace all uses of
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// the old global variable with the new one.
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(void)new GlobalVariable(M, NewInit->getType(), false,
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GlobalValue::AppendingLinkage, NewInit, Array);
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}
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void llvm::appendToGlobalCtors(Module &M, Function *F, int Priority) {
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appendToGlobalArray("llvm.global_ctors", M, F, Priority);
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}
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void llvm::appendToGlobalDtors(Module &M, Function *F, int Priority) {
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appendToGlobalArray("llvm.global_dtors", M, F, Priority);
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}
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