It's not necessary to do rounding for alloca operations when the requested
alignment is equal to the stack alignment.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40004 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/Utils/CloneModule.cpp b/lib/Transforms/Utils/CloneModule.cpp
new file mode 100644
index 0000000..d64d58f
--- /dev/null
+++ b/lib/Transforms/Utils/CloneModule.cpp
@@ -0,0 +1,124 @@
+//===- CloneModule.cpp - Clone an entire module ---------------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file was developed by the LLVM research group and is distributed under
+// the University of Illinois Open Source License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements the CloneModule interface which makes a copy of an
+// entire module.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Transforms/Utils/Cloning.h"
+#include "llvm/Module.h"
+#include "llvm/DerivedTypes.h"
+#include "llvm/TypeSymbolTable.h"
+#include "llvm/Constant.h"
+#include "ValueMapper.h"
+using namespace llvm;
+
+/// CloneModule - Return an exact copy of the specified module. This is not as
+/// easy as it might seem because we have to worry about making copies of global
+/// variables and functions, and making their (initializers and references,
+/// respectively) refer to the right globals.
+///
+Module *llvm::CloneModule(const Module *M) {
+ // Create the value map that maps things from the old module over to the new
+ // module.
+ DenseMap<const Value*, Value*> ValueMap;
+ return CloneModule(M, ValueMap);
+}
+
+Module *llvm::CloneModule(const Module *M,
+ DenseMap<const Value*, Value*> &ValueMap) {
+ // First off, we need to create the new module...
+ Module *New = new Module(M->getModuleIdentifier());
+ New->setDataLayout(M->getDataLayout());
+ New->setTargetTriple(M->getTargetTriple());
+ New->setModuleInlineAsm(M->getModuleInlineAsm());
+
+ // Copy all of the type symbol table entries over.
+ const TypeSymbolTable &TST = M->getTypeSymbolTable();
+ for (TypeSymbolTable::const_iterator TI = TST.begin(), TE = TST.end();
+ TI != TE; ++TI)
+ New->addTypeName(TI->first, TI->second);
+
+ // Copy all of the dependent libraries over.
+ for (Module::lib_iterator I = M->lib_begin(), E = M->lib_end(); I != E; ++I)
+ New->addLibrary(*I);
+
+ // Loop over all of the global variables, making corresponding globals in the
+ // new module. Here we add them to the ValueMap and to the new Module. We
+ // don't worry about attributes or initializers, they will come later.
+ //
+ for (Module::const_global_iterator I = M->global_begin(), E = M->global_end();
+ I != E; ++I)
+ ValueMap[I] = new GlobalVariable(I->getType()->getElementType(), false,
+ GlobalValue::ExternalLinkage, 0,
+ I->getName(), New);
+
+ // Loop over the functions in the module, making external functions as before
+ for (Module::const_iterator I = M->begin(), E = M->end(); I != E; ++I) {
+ Function *NF =
+ new Function(cast<FunctionType>(I->getType()->getElementType()),
+ GlobalValue::ExternalLinkage, I->getName(), New);
+ NF->setCallingConv(I->getCallingConv());
+ ValueMap[I]= NF;
+ }
+
+ // Loop over the aliases in the module
+ for (Module::const_alias_iterator I = M->alias_begin(), E = M->alias_end();
+ I != E; ++I)
+ ValueMap[I] = new GlobalAlias(I->getType(), GlobalAlias::ExternalLinkage,
+ I->getName(), NULL, New);
+
+ // Now that all of the things that global variable initializer can refer to
+ // have been created, loop through and copy the global variable referrers
+ // over... We also set the attributes on the global now.
+ //
+ for (Module::const_global_iterator I = M->global_begin(), E = M->global_end();
+ I != E; ++I) {
+ GlobalVariable *GV = cast<GlobalVariable>(ValueMap[I]);
+ if (I->hasInitializer())
+ GV->setInitializer(cast<Constant>(MapValue(I->getInitializer(),
+ ValueMap)));
+ GV->setLinkage(I->getLinkage());
+ GV->setThreadLocal(I->isThreadLocal());
+ GV->setConstant(I->isConstant());
+ }
+
+ // Similarly, copy over function bodies now...
+ //
+ for (Module::const_iterator I = M->begin(), E = M->end(); I != E; ++I) {
+ Function *F = cast<Function>(ValueMap[I]);
+ if (!I->isDeclaration()) {
+ Function::arg_iterator DestI = F->arg_begin();
+ for (Function::const_arg_iterator J = I->arg_begin(); J != I->arg_end();
+ ++J) {
+ DestI->setName(J->getName());
+ ValueMap[J] = DestI++;
+ }
+
+ std::vector<ReturnInst*> Returns; // Ignore returns cloned...
+ CloneFunctionInto(F, I, ValueMap, Returns);
+ }
+
+ F->setLinkage(I->getLinkage());
+ }
+
+ // And aliases
+ for (Module::const_alias_iterator I = M->alias_begin(), E = M->alias_end();
+ I != E; ++I) {
+ GlobalAlias *GA = cast<GlobalAlias>(ValueMap[I]);
+ GA->setLinkage(I->getLinkage());
+ if (const Constant* C = I->getAliasee())
+ GA->setAliasee(cast<Constant>(MapValue(C, ValueMap)));
+ }
+
+ return New;
+}
+
+// vim: sw=2