Use names instead of numbers for some of the magic

[oota-llvm.git] / lib / Transforms / Utils / CloneModule.cpp

diff --git a/lib/Transforms/Utils/CloneModule.cpp b/lib/Transforms/Utils/CloneModule.cpp
index 324e00aaa8c1208b633c41cceee4f790b31c74fb..0285f8c8d107b052adc5e7daad7a01f15642bc30 100644 (file)
--- a/lib/Transforms/Utils/CloneModule.cpp
+++ b/lib/Transforms/Utils/CloneModule.cpp
@@ -2,8 +2,8 @@
 //
 //                     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 is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
@@ -15,9 +15,9 @@
 #include "llvm/Transforms/Utils/Cloning.h"
 #include "llvm/Module.h"
 #include "llvm/DerivedTypes.h"
-#include "llvm/SymbolTable.h"
+#include "llvm/TypeSymbolTable.h"
 #include "llvm/Constant.h"
-#include "ValueMapper.h"
+#include "llvm/Transforms/Utils/ValueMapper.h"
 using namespace llvm;
 
 /// CloneModule - Return an exact copy of the specified module.  This is not as
@@ -26,46 +26,60 @@ using namespace llvm;
 /// 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->setEndianness(M->getEndianness());
-  New->setPointerSize(M->getPointerSize());
+  Module *New = new Module(M->getModuleIdentifier(), M->getContext());
+  New->setDataLayout(M->getDataLayout());
   New->setTargetTriple(M->getTargetTriple());
+  New->setModuleInlineAsm(M->getModuleInlineAsm());
 
   // Copy all of the type symbol table entries over.
-  const SymbolTable &SymTab = M->getSymbolTable();
-  SymbolTable::type_const_iterator TypeI = SymTab.type_begin();
-  SymbolTable::type_const_iterator TypeE = SymTab.type_end();
-  for (; TypeI != TypeE; ++TypeI)
-    New->addTypeName(TypeI->first, TypeI->second);
+  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);
 
-  // Create the value map that maps things from the old module over to the new
-  // module.
-  std::map<const Value*, Value*> ValueMap;
-
   // 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);
+       I != E; ++I) {
+    GlobalVariable *GV = new GlobalVariable(*New, 
+                                            I->getType()->getElementType(),
+                                            false,
+                                            GlobalValue::ExternalLinkage, 0,
+                                            I->getName());
+    GV->setAlignment(I->getAlignment());
+    ValueMap[I] = GV;
+  }
 
   // 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;
+      Function::Create(cast<FunctionType>(I->getType()->getElementType()),
+                       GlobalValue::ExternalLinkage, I->getName(), New);
+    NF->copyAttributesFrom(I);
+    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.
@@ -75,15 +89,18 @@ Module *llvm::CloneModule(const Module *M) {
     GlobalVariable *GV = cast<GlobalVariable>(ValueMap[I]);
     if (I->hasInitializer())
       GV->setInitializer(cast<Constant>(MapValue(I->getInitializer(),
-                                                 ValueMap)));
+                                                 ValueMap,
+                                                 M->getContext())));
     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->isExternal()) {
+    if (!I->isDeclaration()) {
       Function::arg_iterator DestI = F->arg_begin();
       for (Function::const_arg_iterator J = I->arg_begin(); J != I->arg_end();
            ++J) {
@@ -91,14 +108,21 @@ Module *llvm::CloneModule(const Module *M) {
         ValueMap[J] = DestI++;
       }
 
-      std::vector<ReturnInst*> Returns;  // Ignore returns cloned...
+      SmallVector<ReturnInst*, 8> 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, M->getContext())));
+  }
+  
   return New;
 }
-
-// vim: sw=2