LinkModules.cpp revision 82b5b219dd3b9035442389ddcd58e6f859aae039
152f7e908cb634f9b9b539d5c6670b8a065478915Chris Lattner//===- Linker.cpp - Module Linker Implementation --------------------------===// 2b576c94c15af9a440f69d9d03c2afead7971118cJohn Criswell// 3b576c94c15af9a440f69d9d03c2afead7971118cJohn Criswell// The LLVM Compiler Infrastructure 4b576c94c15af9a440f69d9d03c2afead7971118cJohn Criswell// 5b576c94c15af9a440f69d9d03c2afead7971118cJohn Criswell// This file was developed by the LLVM research group and is distributed under 6b576c94c15af9a440f69d9d03c2afead7971118cJohn Criswell// the University of Illinois Open Source License. See LICENSE.TXT for details. 7b576c94c15af9a440f69d9d03c2afead7971118cJohn Criswell// 8b576c94c15af9a440f69d9d03c2afead7971118cJohn Criswell//===----------------------------------------------------------------------===// 952f7e908cb634f9b9b539d5c6670b8a065478915Chris Lattner// 1052f7e908cb634f9b9b539d5c6670b8a065478915Chris Lattner// This file implements the LLVM module linker. 1152f7e908cb634f9b9b539d5c6670b8a065478915Chris Lattner// 1252f7e908cb634f9b9b539d5c6670b8a065478915Chris Lattner// Specifically, this: 138d2de8a82cce67513debee7a3fa5aca0189b4105Chris Lattner// * Merges global variables between the two modules 148d2de8a82cce67513debee7a3fa5aca0189b4105Chris Lattner// * Uninit + Uninit = Init, Init + Uninit = Init, Init + Init = Error if != 15c8cc4cb03bd90f89be7fe1649542a2d5ae689632Chris Lattner// * Merges functions between two modules 1652f7e908cb634f9b9b539d5c6670b8a065478915Chris Lattner// 1752f7e908cb634f9b9b539d5c6670b8a065478915Chris Lattner//===----------------------------------------------------------------------===// 1852f7e908cb634f9b9b539d5c6670b8a065478915Chris Lattner 19c837dd93cd20b7e37f70d9496ef63e213e4b4713Misha Brukman#include "llvm/Support/Linker.h" 20adbc0b5287bf36893cdcae2440d48b3cb3489e38Chris Lattner#include "llvm/Constants.h" 21adbc0b5287bf36893cdcae2440d48b3cb3489e38Chris Lattner#include "llvm/DerivedTypes.h" 225c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner#include "llvm/Module.h" 235c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner#include "llvm/SymbolTable.h" 2447b14a4a6a455c7be169cfd312fcbe796f0ad426Misha Brukman#include "llvm/Instructions.h" 25adbc0b5287bf36893cdcae2440d48b3cb3489e38Chris Lattner#include "llvm/Assembly/Writer.h" 26c28a224c68adf0464c275778af4bce762ad25d37Reid Spencer#include <iostream> 27c28a224c68adf0464c275778af4bce762ad25d37Reid Spencer 28f7703df4968084c18c248c1feea9961c19a32e6aChris Lattnerusing namespace llvm; 29d0fde30ce850b78371fd1386338350591f9ff494Brian Gaeke 305c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner// Error - Simple wrapper function to conditionally assign to E and return true. 315c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner// This just makes error return conditions a little bit simpler... 325c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner// 338166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattnerstatic inline bool Error(std::string *E, const std::string &Message) { 345c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner if (E) *E = Message; 355c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner return true; 365c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner} 375c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner 38700867bb69ae1469f2b20005a79fd133e83fd552John Criswell// 39700867bb69ae1469f2b20005a79fd133e83fd552John Criswell// Function: ResolveTypes() 40700867bb69ae1469f2b20005a79fd133e83fd552John Criswell// 41700867bb69ae1469f2b20005a79fd133e83fd552John Criswell// Description: 42700867bb69ae1469f2b20005a79fd133e83fd552John Criswell// Attempt to link the two specified types together. 43700867bb69ae1469f2b20005a79fd133e83fd552John Criswell// 44700867bb69ae1469f2b20005a79fd133e83fd552John Criswell// Inputs: 45700867bb69ae1469f2b20005a79fd133e83fd552John Criswell// DestTy - The type to which we wish to resolve. 46700867bb69ae1469f2b20005a79fd133e83fd552John Criswell// SrcTy - The original type which we want to resolve. 47700867bb69ae1469f2b20005a79fd133e83fd552John Criswell// Name - The name of the type. 48700867bb69ae1469f2b20005a79fd133e83fd552John Criswell// 49700867bb69ae1469f2b20005a79fd133e83fd552John Criswell// Outputs: 50700867bb69ae1469f2b20005a79fd133e83fd552John Criswell// DestST - The symbol table in which the new type should be placed. 51700867bb69ae1469f2b20005a79fd133e83fd552John Criswell// 52700867bb69ae1469f2b20005a79fd133e83fd552John Criswell// Return value: 53700867bb69ae1469f2b20005a79fd133e83fd552John Criswell// true - There is an error and the types cannot yet be linked. 54700867bb69ae1469f2b20005a79fd133e83fd552John Criswell// false - No errors. 554c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner// 56e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattnerstatic bool ResolveTypes(const Type *DestTy, const Type *SrcTy, 57e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner SymbolTable *DestST, const std::string &Name) { 58e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner if (DestTy == SrcTy) return false; // If already equal, noop 59e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner 604c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner // Does the type already exist in the module? 614c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner if (DestTy && !isa<OpaqueType>(DestTy)) { // Yup, the type already exists... 62e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner if (const OpaqueType *OT = dyn_cast<OpaqueType>(SrcTy)) { 63e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner const_cast<OpaqueType*>(OT)->refineAbstractTypeTo(DestTy); 644c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner } else { 654c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner return true; // Cannot link types... neither is opaque and not-equal 664c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner } 674c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner } else { // Type not in dest module. Add it now. 684c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner if (DestTy) // Type _is_ in module, just opaque... 69e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner const_cast<OpaqueType*>(cast<OpaqueType>(DestTy)) 70e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner ->refineAbstractTypeTo(SrcTy); 71fcd0234de65fc07fb06f3245b60e82bdba78c745Chris Lattner else if (!Name.empty()) 72e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner DestST->insert(Name, const_cast<Type*>(SrcTy)); 734c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner } 744c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner return false; 754c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner} 764c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner 7743f4ba8c7d19664bb5de73a7b391b67061f25d22Chris Lattnerstatic const FunctionType *getFT(const PATypeHolder &TH) { 7843f4ba8c7d19664bb5de73a7b391b67061f25d22Chris Lattner return cast<FunctionType>(TH.get()); 7943f4ba8c7d19664bb5de73a7b391b67061f25d22Chris Lattner} 809732be769e57f1dec03f046ab957053048f60e40Chris Lattnerstatic const StructType *getST(const PATypeHolder &TH) { 8143f4ba8c7d19664bb5de73a7b391b67061f25d22Chris Lattner return cast<StructType>(TH.get()); 8243f4ba8c7d19664bb5de73a7b391b67061f25d22Chris Lattner} 83e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner 84e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner// RecursiveResolveTypes - This is just like ResolveTypes, except that it 85e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner// recurses down into derived types, merging the used types if the parent types 86e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner// are compatible. 87e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner// 88e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattnerstatic bool RecursiveResolveTypesI(const PATypeHolder &DestTy, 89e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattner const PATypeHolder &SrcTy, 90e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattner SymbolTable *DestST, const std::string &Name, 91e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattner std::vector<std::pair<PATypeHolder, PATypeHolder> > &Pointers) { 9243f4ba8c7d19664bb5de73a7b391b67061f25d22Chris Lattner const Type *SrcTyT = SrcTy.get(); 9343f4ba8c7d19664bb5de73a7b391b67061f25d22Chris Lattner const Type *DestTyT = DestTy.get(); 9443f4ba8c7d19664bb5de73a7b391b67061f25d22Chris Lattner if (DestTyT == SrcTyT) return false; // If already equal, noop 95e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner 96e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner // If we found our opaque type, resolve it now! 9743f4ba8c7d19664bb5de73a7b391b67061f25d22Chris Lattner if (isa<OpaqueType>(DestTyT) || isa<OpaqueType>(SrcTyT)) 9843f4ba8c7d19664bb5de73a7b391b67061f25d22Chris Lattner return ResolveTypes(DestTyT, SrcTyT, DestST, Name); 99e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner 100e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner // Two types cannot be resolved together if they are of different primitive 101e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner // type. For example, we cannot resolve an int to a float. 102f70c22b019494723d0e706f93d6542dfaa6e73a5Chris Lattner if (DestTyT->getTypeID() != SrcTyT->getTypeID()) return true; 103e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner 104e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner // Otherwise, resolve the used type used by this derived type... 105f70c22b019494723d0e706f93d6542dfaa6e73a5Chris Lattner switch (DestTyT->getTypeID()) { 106e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner case Type::FunctionTyID: { 10743f4ba8c7d19664bb5de73a7b391b67061f25d22Chris Lattner if (cast<FunctionType>(DestTyT)->isVarArg() != 108841e00b96295a2b66cb7573e961656d28a6cb12bChris Lattner cast<FunctionType>(SrcTyT)->isVarArg() || 109841e00b96295a2b66cb7573e961656d28a6cb12bChris Lattner cast<FunctionType>(DestTyT)->getNumContainedTypes() != 110841e00b96295a2b66cb7573e961656d28a6cb12bChris Lattner cast<FunctionType>(SrcTyT)->getNumContainedTypes()) 11143f4ba8c7d19664bb5de73a7b391b67061f25d22Chris Lattner return true; 11243f4ba8c7d19664bb5de73a7b391b67061f25d22Chris Lattner for (unsigned i = 0, e = getFT(DestTy)->getNumContainedTypes(); i != e; ++i) 113e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattner if (RecursiveResolveTypesI(getFT(DestTy)->getContainedType(i), 114e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattner getFT(SrcTy)->getContainedType(i), DestST, "", 115e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattner Pointers)) 116e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner return true; 117e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner return false; 118e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner } 119e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner case Type::StructTyID: { 12043f4ba8c7d19664bb5de73a7b391b67061f25d22Chris Lattner if (getST(DestTy)->getNumContainedTypes() != 12143f4ba8c7d19664bb5de73a7b391b67061f25d22Chris Lattner getST(SrcTy)->getNumContainedTypes()) return 1; 12243f4ba8c7d19664bb5de73a7b391b67061f25d22Chris Lattner for (unsigned i = 0, e = getST(DestTy)->getNumContainedTypes(); i != e; ++i) 123e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattner if (RecursiveResolveTypesI(getST(DestTy)->getContainedType(i), 124e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattner getST(SrcTy)->getContainedType(i), DestST, "", 125e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattner Pointers)) 126e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner return true; 127e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner return false; 128e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner } 129e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner case Type::ArrayTyID: { 13043f4ba8c7d19664bb5de73a7b391b67061f25d22Chris Lattner const ArrayType *DAT = cast<ArrayType>(DestTy.get()); 13143f4ba8c7d19664bb5de73a7b391b67061f25d22Chris Lattner const ArrayType *SAT = cast<ArrayType>(SrcTy.get()); 132e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner if (DAT->getNumElements() != SAT->getNumElements()) return true; 133e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattner return RecursiveResolveTypesI(DAT->getElementType(), SAT->getElementType(), 134e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattner DestST, "", Pointers); 135e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattner } 136e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattner case Type::PointerTyID: { 137e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattner // If this is a pointer type, check to see if we have already seen it. If 138e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattner // so, we are in a recursive branch. Cut off the search now. We cannot use 139e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattner // an associative container for this search, because the type pointers (keys 140e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattner // in the container) change whenever types get resolved... 141e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattner // 142e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattner for (unsigned i = 0, e = Pointers.size(); i != e; ++i) 143e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattner if (Pointers[i].first == DestTy) 144e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattner return Pointers[i].second != SrcTy; 145e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattner 146e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattner // Otherwise, add the current pointers to the vector to stop recursion on 147e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattner // this pair. 148e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattner Pointers.push_back(std::make_pair(DestTyT, SrcTyT)); 149e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattner bool Result = 150e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattner RecursiveResolveTypesI(cast<PointerType>(DestTy.get())->getElementType(), 151e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattner cast<PointerType>(SrcTy.get())->getElementType(), 152e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattner DestST, "", Pointers); 153e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattner Pointers.pop_back(); 154e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattner return Result; 155e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner } 156e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner default: assert(0 && "Unexpected type!"); return true; 157e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner } 158e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner} 159e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner 160e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattnerstatic bool RecursiveResolveTypes(const PATypeHolder &DestTy, 161e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattner const PATypeHolder &SrcTy, 162e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattner SymbolTable *DestST, const std::string &Name){ 163e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattner std::vector<std::pair<PATypeHolder, PATypeHolder> > PointerTypes; 164e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattner return RecursiveResolveTypesI(DestTy, SrcTy, DestST, Name, PointerTypes); 165e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattner} 166e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattner 167e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner 1682c236f3e20a0fb84b5948efa6bb7bb60d759cb32Chris Lattner// LinkTypes - Go through the symbol table of the Src module and see if any 1692c236f3e20a0fb84b5948efa6bb7bb60d759cb32Chris Lattner// types are named in the src module that are not named in the Dst module. 1702c236f3e20a0fb84b5948efa6bb7bb60d759cb32Chris Lattner// Make sure there are no type name conflicts. 1712c236f3e20a0fb84b5948efa6bb7bb60d759cb32Chris Lattner// 1725c2d335d86579941b71816196a95a64b277e8963Chris Lattnerstatic bool LinkTypes(Module *Dest, const Module *Src, std::string *Err) { 1736e6026b46569b01f8f6d4dcdb6c899c3a9c76b3eChris Lattner SymbolTable *DestST = &Dest->getSymbolTable(); 1746e6026b46569b01f8f6d4dcdb6c899c3a9c76b3eChris Lattner const SymbolTable *SrcST = &Src->getSymbolTable(); 1752c236f3e20a0fb84b5948efa6bb7bb60d759cb32Chris Lattner 1762c236f3e20a0fb84b5948efa6bb7bb60d759cb32Chris Lattner // Look for a type plane for Type's... 177567bc2cc1ed4d610daceecbb4ff7f92ebde1b530Reid Spencer SymbolTable::type_const_iterator TI = SrcST->type_begin(); 178567bc2cc1ed4d610daceecbb4ff7f92ebde1b530Reid Spencer SymbolTable::type_const_iterator TE = SrcST->type_end(); 179567bc2cc1ed4d610daceecbb4ff7f92ebde1b530Reid Spencer if (TI == TE) return false; // No named types, do nothing. 1802c236f3e20a0fb84b5948efa6bb7bb60d759cb32Chris Lattner 181cf00c4ab3ba308d45d98c5ccab87362cf802facbMisha Brukman // Some types cannot be resolved immediately because they depend on other 182cf00c4ab3ba308d45d98c5ccab87362cf802facbMisha Brukman // types being resolved to each other first. This contains a list of types we 183cf00c4ab3ba308d45d98c5ccab87362cf802facbMisha Brukman // are waiting to recheck. 1844c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner std::vector<std::string> DelayedTypesToResolve; 1854c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner 186567bc2cc1ed4d610daceecbb4ff7f92ebde1b530Reid Spencer for ( ; TI != TE; ++TI ) { 187567bc2cc1ed4d610daceecbb4ff7f92ebde1b530Reid Spencer const std::string &Name = TI->first; 188c28a224c68adf0464c275778af4bce762ad25d37Reid Spencer const Type *RHS = TI->second; 1892c236f3e20a0fb84b5948efa6bb7bb60d759cb32Chris Lattner 1902c236f3e20a0fb84b5948efa6bb7bb60d759cb32Chris Lattner // Check to see if this type name is already in the dest module... 191567bc2cc1ed4d610daceecbb4ff7f92ebde1b530Reid Spencer Type *Entry = DestST->lookupType(Name); 1924c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner 1934c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner if (ResolveTypes(Entry, RHS, DestST, Name)) { 1944c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner // They look different, save the types 'till later to resolve. 1954c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner DelayedTypesToResolve.push_back(Name); 1964c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner } 1974c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner } 1984c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner 1994c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner // Iteratively resolve types while we can... 2004c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner while (!DelayedTypesToResolve.empty()) { 2014c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner // Loop over all of the types, attempting to resolve them if possible... 2024c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner unsigned OldSize = DelayedTypesToResolve.size(); 2034c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner 204e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner // Try direct resolution by name... 2054c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner for (unsigned i = 0; i != DelayedTypesToResolve.size(); ++i) { 2064c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner const std::string &Name = DelayedTypesToResolve[i]; 207567bc2cc1ed4d610daceecbb4ff7f92ebde1b530Reid Spencer Type *T1 = SrcST->lookupType(Name); 208567bc2cc1ed4d610daceecbb4ff7f92ebde1b530Reid Spencer Type *T2 = DestST->lookupType(Name); 2094c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner if (!ResolveTypes(T2, T1, DestST, Name)) { 2104c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner // We are making progress! 2114c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner DelayedTypesToResolve.erase(DelayedTypesToResolve.begin()+i); 2124c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner --i; 2132f6bb2bce13084dfc4c8acf47f9eae0578267aaaChris Lattner } 2144c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner } 2152f6bb2bce13084dfc4c8acf47f9eae0578267aaaChris Lattner 2164c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner // Did we not eliminate any types? 2174c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner if (DelayedTypesToResolve.size() == OldSize) { 218e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner // Attempt to resolve subelements of types. This allows us to merge these 219e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner // two types: { int* } and { opaque* } 2204c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner for (unsigned i = 0, e = DelayedTypesToResolve.size(); i != e; ++i) { 2214c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner const std::string &Name = DelayedTypesToResolve[i]; 222567bc2cc1ed4d610daceecbb4ff7f92ebde1b530Reid Spencer PATypeHolder T1(SrcST->lookupType(Name)); 223567bc2cc1ed4d610daceecbb4ff7f92ebde1b530Reid Spencer PATypeHolder T2(DestST->lookupType(Name)); 224e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner 225e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner if (!RecursiveResolveTypes(T2, T1, DestST, Name)) { 226e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner // We are making progress! 227e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner DelayedTypesToResolve.erase(DelayedTypesToResolve.begin()+i); 228e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner 229e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner // Go back to the main loop, perhaps we can resolve directly by name 230e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner // now... 231e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner break; 232e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner } 233e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner } 234e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner 235e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner // If we STILL cannot resolve the types, then there is something wrong. 236aeb18ce9c012f8554f48bae9bb32351c6eeaa26cChris Lattner // Report the warning and delete one of the names. 237e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner if (DelayedTypesToResolve.size() == OldSize) { 238aeb18ce9c012f8554f48bae9bb32351c6eeaa26cChris Lattner const std::string &Name = DelayedTypesToResolve.back(); 239aeb18ce9c012f8554f48bae9bb32351c6eeaa26cChris Lattner 240567bc2cc1ed4d610daceecbb4ff7f92ebde1b530Reid Spencer const Type *T1 = SrcST->lookupType(Name); 241567bc2cc1ed4d610daceecbb4ff7f92ebde1b530Reid Spencer const Type *T2 = DestST->lookupType(Name); 242aeb18ce9c012f8554f48bae9bb32351c6eeaa26cChris Lattner std::cerr << "WARNING: Type conflict between types named '" << Name 243adbc0b5287bf36893cdcae2440d48b3cb3489e38Chris Lattner << "'.\n Src='"; 244adbc0b5287bf36893cdcae2440d48b3cb3489e38Chris Lattner WriteTypeSymbolic(std::cerr, T1, Src); 245adbc0b5287bf36893cdcae2440d48b3cb3489e38Chris Lattner std::cerr << "'.\n Dest='"; 246adbc0b5287bf36893cdcae2440d48b3cb3489e38Chris Lattner WriteTypeSymbolic(std::cerr, T2, Dest); 247adbc0b5287bf36893cdcae2440d48b3cb3489e38Chris Lattner std::cerr << "'\n"; 248aeb18ce9c012f8554f48bae9bb32351c6eeaa26cChris Lattner 249aeb18ce9c012f8554f48bae9bb32351c6eeaa26cChris Lattner // Remove the symbol name from the destination. 250aeb18ce9c012f8554f48bae9bb32351c6eeaa26cChris Lattner DelayedTypesToResolve.pop_back(); 2514c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner } 2522c236f3e20a0fb84b5948efa6bb7bb60d759cb32Chris Lattner } 2532c236f3e20a0fb84b5948efa6bb7bb60d759cb32Chris Lattner } 2544c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner 2554c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner 2562c236f3e20a0fb84b5948efa6bb7bb60d759cb32Chris Lattner return false; 2572c236f3e20a0fb84b5948efa6bb7bb60d759cb32Chris Lattner} 2582c236f3e20a0fb84b5948efa6bb7bb60d759cb32Chris Lattner 2595c2d335d86579941b71816196a95a64b277e8963Chris Lattnerstatic void PrintMap(const std::map<const Value*, Value*> &M) { 2605c2d335d86579941b71816196a95a64b277e8963Chris Lattner for (std::map<const Value*, Value*>::const_iterator I = M.begin(), E =M.end(); 2612d3e8bba628843bf2dffa21f69d9b45098d3bfc4Chris Lattner I != E; ++I) { 2625c2d335d86579941b71816196a95a64b277e8963Chris Lattner std::cerr << " Fr: " << (void*)I->first << " "; 26387182ae6baf28ca6da6ee4bc00cf1857f293acfeChris Lattner I->first->dump(); 2645c2d335d86579941b71816196a95a64b277e8963Chris Lattner std::cerr << " To: " << (void*)I->second << " "; 26587182ae6baf28ca6da6ee4bc00cf1857f293acfeChris Lattner I->second->dump(); 2665c2d335d86579941b71816196a95a64b277e8963Chris Lattner std::cerr << "\n"; 2672d3e8bba628843bf2dffa21f69d9b45098d3bfc4Chris Lattner } 2682d3e8bba628843bf2dffa21f69d9b45098d3bfc4Chris Lattner} 2692d3e8bba628843bf2dffa21f69d9b45098d3bfc4Chris Lattner 2702d3e8bba628843bf2dffa21f69d9b45098d3bfc4Chris Lattner 2715c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner// RemapOperand - Use LocalMap and GlobalMap to convert references from one 2725c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner// module to another. This is somewhat sophisticated in that it can 2735c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner// automatically handle constant references correctly as well... 2745c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner// 2755c2d335d86579941b71816196a95a64b277e8963Chris Lattnerstatic Value *RemapOperand(const Value *In, 2765c2d335d86579941b71816196a95a64b277e8963Chris Lattner std::map<const Value*, Value*> &LocalMap, 2775c2d335d86579941b71816196a95a64b277e8963Chris Lattner std::map<const Value*, Value*> *GlobalMap) { 2785c2d335d86579941b71816196a95a64b277e8963Chris Lattner std::map<const Value*,Value*>::const_iterator I = LocalMap.find(In); 2795c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner if (I != LocalMap.end()) return I->second; 2805c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner 2815c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner if (GlobalMap) { 2825c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner I = GlobalMap->find(In); 2835c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner if (I != GlobalMap->end()) return I->second; 2845c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner } 2855c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner 2868d2de8a82cce67513debee7a3fa5aca0189b4105Chris Lattner // Check to see if it's a constant that we are interesting in transforming... 28718961504fc2b299578dba817900a0696cf3ccc4dChris Lattner if (const Constant *CPV = dyn_cast<Constant>(In)) { 288de512b5b2edebe9c9021a92c7c7a9ae9fbc380d6Chris Lattner if ((!isa<DerivedType>(CPV->getType()) && !isa<ConstantExpr>(CPV)) || 289de512b5b2edebe9c9021a92c7c7a9ae9fbc380d6Chris Lattner isa<ConstantAggregateZero>(CPV)) 29018961504fc2b299578dba817900a0696cf3ccc4dChris Lattner return const_cast<Constant*>(CPV); // Simple constants stay identical... 2918d2de8a82cce67513debee7a3fa5aca0189b4105Chris Lattner 292e9bb2df410f7a22decad9a883f7139d5857c1520Chris Lattner Constant *Result = 0; 2938d2de8a82cce67513debee7a3fa5aca0189b4105Chris Lattner 29418961504fc2b299578dba817900a0696cf3ccc4dChris Lattner if (const ConstantArray *CPA = dyn_cast<ConstantArray>(CPV)) { 295cc7ba49d85b66955516ff0d9574a70e1637dea36Alkis Evlogimenos std::vector<Constant*> Operands(CPA->getNumOperands()); 296cc7ba49d85b66955516ff0d9574a70e1637dea36Alkis Evlogimenos for (unsigned i = 0, e = CPA->getNumOperands(); i != e; ++i) 297cc7ba49d85b66955516ff0d9574a70e1637dea36Alkis Evlogimenos Operands[i] = 298cc7ba49d85b66955516ff0d9574a70e1637dea36Alkis Evlogimenos cast<Constant>(RemapOperand(CPA->getOperand(i), LocalMap, GlobalMap)); 299e9bb2df410f7a22decad9a883f7139d5857c1520Chris Lattner Result = ConstantArray::get(cast<ArrayType>(CPA->getType()), Operands); 30018961504fc2b299578dba817900a0696cf3ccc4dChris Lattner } else if (const ConstantStruct *CPS = dyn_cast<ConstantStruct>(CPV)) { 301cc7ba49d85b66955516ff0d9574a70e1637dea36Alkis Evlogimenos std::vector<Constant*> Operands(CPS->getNumOperands()); 302cc7ba49d85b66955516ff0d9574a70e1637dea36Alkis Evlogimenos for (unsigned i = 0, e = CPS->getNumOperands(); i != e; ++i) 303cc7ba49d85b66955516ff0d9574a70e1637dea36Alkis Evlogimenos Operands[i] = 304cc7ba49d85b66955516ff0d9574a70e1637dea36Alkis Evlogimenos cast<Constant>(RemapOperand(CPS->getOperand(i), LocalMap, GlobalMap)); 305e9bb2df410f7a22decad9a883f7139d5857c1520Chris Lattner Result = ConstantStruct::get(cast<StructType>(CPS->getType()), Operands); 306e9bb2df410f7a22decad9a883f7139d5857c1520Chris Lattner } else if (isa<ConstantPointerNull>(CPV)) { 30718961504fc2b299578dba817900a0696cf3ccc4dChris Lattner Result = const_cast<Constant*>(CPV); 30800dc4796132933e76fe2b834ca087e42621c175aReid Spencer } else if (isa<GlobalValue>(CPV)) { 30900dc4796132933e76fe2b834ca087e42621c175aReid Spencer Result = cast<Constant>(RemapOperand(CPV, LocalMap, GlobalMap)); 3106cdf1971bdf88ddd9a7d46b5f5f975497d68c38eChris Lattner } else if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CPV)) { 311b319faff77a5bb12e753c45662f6c532b77f0b91Chris Lattner if (CE->getOpcode() == Instruction::GetElementPtr) { 312b319faff77a5bb12e753c45662f6c532b77f0b91Chris Lattner Value *Ptr = RemapOperand(CE->getOperand(0), LocalMap, GlobalMap); 313b319faff77a5bb12e753c45662f6c532b77f0b91Chris Lattner std::vector<Constant*> Indices; 314b319faff77a5bb12e753c45662f6c532b77f0b91Chris Lattner Indices.reserve(CE->getNumOperands()-1); 315b319faff77a5bb12e753c45662f6c532b77f0b91Chris Lattner for (unsigned i = 1, e = CE->getNumOperands(); i != e; ++i) 316b319faff77a5bb12e753c45662f6c532b77f0b91Chris Lattner Indices.push_back(cast<Constant>(RemapOperand(CE->getOperand(i), 317b319faff77a5bb12e753c45662f6c532b77f0b91Chris Lattner LocalMap, GlobalMap))); 318b319faff77a5bb12e753c45662f6c532b77f0b91Chris Lattner 319b319faff77a5bb12e753c45662f6c532b77f0b91Chris Lattner Result = ConstantExpr::getGetElementPtr(cast<Constant>(Ptr), Indices); 320b319faff77a5bb12e753c45662f6c532b77f0b91Chris Lattner } else if (CE->getNumOperands() == 1) { 321ad333484ea5ae976b83e35ccd3f6cfa6e71290e2Chris Lattner // Cast instruction 322ad333484ea5ae976b83e35ccd3f6cfa6e71290e2Chris Lattner assert(CE->getOpcode() == Instruction::Cast); 3236cdf1971bdf88ddd9a7d46b5f5f975497d68c38eChris Lattner Value *V = RemapOperand(CE->getOperand(0), LocalMap, GlobalMap); 324ad333484ea5ae976b83e35ccd3f6cfa6e71290e2Chris Lattner Result = ConstantExpr::getCast(cast<Constant>(V), CE->getType()); 3251438102576b94d6dac9bb18e8df291c4d632572dChris Lattner } else if (CE->getNumOperands() == 3) { 3261438102576b94d6dac9bb18e8df291c4d632572dChris Lattner // Select instruction 3271438102576b94d6dac9bb18e8df291c4d632572dChris Lattner assert(CE->getOpcode() == Instruction::Select); 3281438102576b94d6dac9bb18e8df291c4d632572dChris Lattner Value *V1 = RemapOperand(CE->getOperand(0), LocalMap, GlobalMap); 3291438102576b94d6dac9bb18e8df291c4d632572dChris Lattner Value *V2 = RemapOperand(CE->getOperand(1), LocalMap, GlobalMap); 3301438102576b94d6dac9bb18e8df291c4d632572dChris Lattner Value *V3 = RemapOperand(CE->getOperand(2), LocalMap, GlobalMap); 3311438102576b94d6dac9bb18e8df291c4d632572dChris Lattner Result = ConstantExpr::getSelect(cast<Constant>(V1), cast<Constant>(V2), 3321438102576b94d6dac9bb18e8df291c4d632572dChris Lattner cast<Constant>(V3)); 3336cdf1971bdf88ddd9a7d46b5f5f975497d68c38eChris Lattner } else if (CE->getNumOperands() == 2) { 3346cdf1971bdf88ddd9a7d46b5f5f975497d68c38eChris Lattner // Binary operator... 3356cdf1971bdf88ddd9a7d46b5f5f975497d68c38eChris Lattner Value *V1 = RemapOperand(CE->getOperand(0), LocalMap, GlobalMap); 3366cdf1971bdf88ddd9a7d46b5f5f975497d68c38eChris Lattner Value *V2 = RemapOperand(CE->getOperand(1), LocalMap, GlobalMap); 3376cdf1971bdf88ddd9a7d46b5f5f975497d68c38eChris Lattner 3386cdf1971bdf88ddd9a7d46b5f5f975497d68c38eChris Lattner Result = ConstantExpr::get(CE->getOpcode(), cast<Constant>(V1), 339d981f8af79be9ea647d593531091740a3a27a85fChris Lattner cast<Constant>(V2)); 3406cdf1971bdf88ddd9a7d46b5f5f975497d68c38eChris Lattner } else { 341b319faff77a5bb12e753c45662f6c532b77f0b91Chris Lattner assert(0 && "Unknown constant expr type!"); 3426cdf1971bdf88ddd9a7d46b5f5f975497d68c38eChris Lattner } 3436cdf1971bdf88ddd9a7d46b5f5f975497d68c38eChris Lattner 3448d2de8a82cce67513debee7a3fa5aca0189b4105Chris Lattner } else { 3458d2de8a82cce67513debee7a3fa5aca0189b4105Chris Lattner assert(0 && "Unknown type of derived type constant value!"); 3468d2de8a82cce67513debee7a3fa5aca0189b4105Chris Lattner } 3478d2de8a82cce67513debee7a3fa5aca0189b4105Chris Lattner 3488d2de8a82cce67513debee7a3fa5aca0189b4105Chris Lattner // Cache the mapping in our local map structure... 349d149c053cdbb406b7b5dff24127b4c509420893eChris Lattner if (GlobalMap) 350d149c053cdbb406b7b5dff24127b4c509420893eChris Lattner GlobalMap->insert(std::make_pair(In, Result)); 351d149c053cdbb406b7b5dff24127b4c509420893eChris Lattner else 352d149c053cdbb406b7b5dff24127b4c509420893eChris Lattner LocalMap.insert(std::make_pair(In, Result)); 3538d2de8a82cce67513debee7a3fa5aca0189b4105Chris Lattner return Result; 3548d2de8a82cce67513debee7a3fa5aca0189b4105Chris Lattner } 3552d3e8bba628843bf2dffa21f69d9b45098d3bfc4Chris Lattner 3565c2d335d86579941b71816196a95a64b277e8963Chris Lattner std::cerr << "XXX LocalMap: \n"; 3572d3e8bba628843bf2dffa21f69d9b45098d3bfc4Chris Lattner PrintMap(LocalMap); 3582d3e8bba628843bf2dffa21f69d9b45098d3bfc4Chris Lattner 3592d3e8bba628843bf2dffa21f69d9b45098d3bfc4Chris Lattner if (GlobalMap) { 3605c2d335d86579941b71816196a95a64b277e8963Chris Lattner std::cerr << "XXX GlobalMap: \n"; 3612d3e8bba628843bf2dffa21f69d9b45098d3bfc4Chris Lattner PrintMap(*GlobalMap); 3622d3e8bba628843bf2dffa21f69d9b45098d3bfc4Chris Lattner } 3632d3e8bba628843bf2dffa21f69d9b45098d3bfc4Chris Lattner 3645c2d335d86579941b71816196a95a64b277e8963Chris Lattner std::cerr << "Couldn't remap value: " << (void*)In << " " << *In << "\n"; 3658d2de8a82cce67513debee7a3fa5aca0189b4105Chris Lattner assert(0 && "Couldn't remap value!"); 3668d2de8a82cce67513debee7a3fa5aca0189b4105Chris Lattner return 0; 3675c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner} 3685c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner 369c003628a612d3687fb77088a5894314210a65385Chris Lattner/// ForceRenaming - The LLVM SymbolTable class autorenames globals that conflict 370c003628a612d3687fb77088a5894314210a65385Chris Lattner/// in the symbol table. This is good for all clients except for us. Go 371c003628a612d3687fb77088a5894314210a65385Chris Lattner/// through the trouble to force this back. 372c003628a612d3687fb77088a5894314210a65385Chris Lattnerstatic void ForceRenaming(GlobalValue *GV, const std::string &Name) { 373c003628a612d3687fb77088a5894314210a65385Chris Lattner assert(GV->getName() != Name && "Can't force rename to self"); 374c003628a612d3687fb77088a5894314210a65385Chris Lattner SymbolTable &ST = GV->getParent()->getSymbolTable(); 375c003628a612d3687fb77088a5894314210a65385Chris Lattner 376c003628a612d3687fb77088a5894314210a65385Chris Lattner // If there is a conflict, rename the conflict. 377c003628a612d3687fb77088a5894314210a65385Chris Lattner Value *ConflictVal = ST.lookup(GV->getType(), Name); 378c003628a612d3687fb77088a5894314210a65385Chris Lattner assert(ConflictVal&&"Why do we have to force rename if there is no conflic?"); 379c003628a612d3687fb77088a5894314210a65385Chris Lattner GlobalValue *ConflictGV = cast<GlobalValue>(ConflictVal); 380c003628a612d3687fb77088a5894314210a65385Chris Lattner assert(ConflictGV->hasInternalLinkage() && 381c003628a612d3687fb77088a5894314210a65385Chris Lattner "Not conflicting with a static global, should link instead!"); 382c003628a612d3687fb77088a5894314210a65385Chris Lattner 383c003628a612d3687fb77088a5894314210a65385Chris Lattner ConflictGV->setName(""); // Eliminate the conflict 384c003628a612d3687fb77088a5894314210a65385Chris Lattner GV->setName(Name); // Force the name back 385c003628a612d3687fb77088a5894314210a65385Chris Lattner ConflictGV->setName(Name); // This will cause ConflictGV to get renamed 3867b0c84dcf59b6ac3a27843fd8162ab36928fba35Chris Lattner assert(GV->getName() == Name && ConflictGV->getName() != Name && 387c003628a612d3687fb77088a5894314210a65385Chris Lattner "ForceRenaming didn't work"); 388c003628a612d3687fb77088a5894314210a65385Chris Lattner} 389c003628a612d3687fb77088a5894314210a65385Chris Lattner 3905c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner 3915c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner// LinkGlobals - Loop through the global variables in the src module and merge 3928166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner// them into the dest module. 3935c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner// 3945c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattnerstatic bool LinkGlobals(Module *Dest, const Module *Src, 3955c2d335d86579941b71816196a95a64b277e8963Chris Lattner std::map<const Value*, Value*> &ValueMap, 3968166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner std::multimap<std::string, GlobalVariable *> &AppendingVars, 3975a837defff581accc09048bea1cd839009e374a7Chris Lattner std::map<std::string, GlobalValue*> &GlobalsByName, 3985c2d335d86579941b71816196a95a64b277e8963Chris Lattner std::string *Err) { 3995c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner // We will need a module level symbol table if the src module has a module 4005c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner // level symbol table... 401b91b657e026e86082b665cc875c2881ed075b68dChris Lattner SymbolTable *ST = (SymbolTable*)&Dest->getSymbolTable(); 4025c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner 4035c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner // Loop over all of the globals in the src module, mapping them over as we go 4045c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner // 4055c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner for (Module::const_giterator I = Src->gbegin(), E = Src->gend(); I != E; ++I){ 40618961504fc2b299578dba817900a0696cf3ccc4dChris Lattner const GlobalVariable *SGV = I; 4074ad02e726d9b634372b037d4b352d8b63bb9e849Chris Lattner GlobalVariable *DGV = 0; 4085a837defff581accc09048bea1cd839009e374a7Chris Lattner // Check to see if may have to link the global. 409fe41069070f1a4b2d58a996b1f82ff747d076435Chris Lattner if (SGV->hasName() && !SGV->hasInternalLinkage()) { 4105a837defff581accc09048bea1cd839009e374a7Chris Lattner std::map<std::string, GlobalValue*>::iterator EGV = 4115a837defff581accc09048bea1cd839009e374a7Chris Lattner GlobalsByName.find(SGV->getName()); 4125a837defff581accc09048bea1cd839009e374a7Chris Lattner if (EGV != GlobalsByName.end()) 4135a837defff581accc09048bea1cd839009e374a7Chris Lattner DGV = dyn_cast<GlobalVariable>(EGV->second); 414868bbf35b079a7f356f6b2fbd9df7e66552bc57eChris Lattner if (DGV && RecursiveResolveTypes(SGV->getType(), DGV->getType(), ST, "")) 415868bbf35b079a7f356f6b2fbd9df7e66552bc57eChris Lattner DGV = 0; // FIXME: gross. 4164ad02e726d9b634372b037d4b352d8b63bb9e849Chris Lattner } 4175c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner 4184ad02e726d9b634372b037d4b352d8b63bb9e849Chris Lattner assert(SGV->hasInitializer() || SGV->hasExternalLinkage() && 4194ad02e726d9b634372b037d4b352d8b63bb9e849Chris Lattner "Global must either be external or have an initializer!"); 4205c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner 4210fec08eb58dd9fffeb72c584aa61a59d71111c8dChris Lattner bool SGExtern = SGV->isExternal(); 4220fec08eb58dd9fffeb72c584aa61a59d71111c8dChris Lattner bool DGExtern = DGV ? DGV->isExternal() : false; 4230fec08eb58dd9fffeb72c584aa61a59d71111c8dChris Lattner 4244ad02e726d9b634372b037d4b352d8b63bb9e849Chris Lattner if (!DGV || DGV->hasInternalLinkage() || SGV->hasInternalLinkage()) { 4255c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner // No linking to be performed, simply create an identical version of the 4268d2de8a82cce67513debee7a3fa5aca0189b4105Chris Lattner // symbol over in the dest module... the initializer will be filled in 4278d2de8a82cce67513debee7a3fa5aca0189b4105Chris Lattner // later by LinkGlobalInits... 4288d2de8a82cce67513debee7a3fa5aca0189b4105Chris Lattner // 4292719bac90525985f4ebb97324b4c087d47b54384Chris Lattner GlobalVariable *NewDGV = 4302719bac90525985f4ebb97324b4c087d47b54384Chris Lattner new GlobalVariable(SGV->getType()->getElementType(), 4312719bac90525985f4ebb97324b4c087d47b54384Chris Lattner SGV->isConstant(), SGV->getLinkage(), /*init*/0, 4322719bac90525985f4ebb97324b4c087d47b54384Chris Lattner SGV->getName(), Dest); 4332719bac90525985f4ebb97324b4c087d47b54384Chris Lattner 4342719bac90525985f4ebb97324b4c087d47b54384Chris Lattner // If the LLVM runtime renamed the global, but it is an externally visible 4352719bac90525985f4ebb97324b4c087d47b54384Chris Lattner // symbol, DGV must be an existing global with internal linkage. Rename 4362719bac90525985f4ebb97324b4c087d47b54384Chris Lattner // it. 437c003628a612d3687fb77088a5894314210a65385Chris Lattner if (NewDGV->getName() != SGV->getName() && !NewDGV->hasInternalLinkage()) 438c003628a612d3687fb77088a5894314210a65385Chris Lattner ForceRenaming(NewDGV, SGV->getName()); 4395c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner 4405c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner // Make sure to remember this mapping... 4412719bac90525985f4ebb97324b4c087d47b54384Chris Lattner ValueMap.insert(std::make_pair(SGV, NewDGV)); 4428166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner if (SGV->hasAppendingLinkage()) 4438166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner // Keep track that this is an appending variable... 4448166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner AppendingVars.insert(std::make_pair(SGV->getName(), NewDGV)); 4458166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner 446c2b97d43a074445c6856d69538a95de09450c26eChris Lattner } else if (SGV->isExternal()) { 447c2b97d43a074445c6856d69538a95de09450c26eChris Lattner // If SGV is external or if both SGV & DGV are external.. Just link the 448c2b97d43a074445c6856d69538a95de09450c26eChris Lattner // external globals, we aren't adding anything. 449c2b97d43a074445c6856d69538a95de09450c26eChris Lattner ValueMap.insert(std::make_pair(SGV, DGV)); 450c2b97d43a074445c6856d69538a95de09450c26eChris Lattner 451c2b97d43a074445c6856d69538a95de09450c26eChris Lattner } else if (DGV->isExternal()) { // If DGV is external but SGV is not... 452c2b97d43a074445c6856d69538a95de09450c26eChris Lattner ValueMap.insert(std::make_pair(SGV, DGV)); 453c2b97d43a074445c6856d69538a95de09450c26eChris Lattner DGV->setLinkage(SGV->getLinkage()); // Inherit linkage! 45435956558e26e655aaa2e8ad6ee405365271869a4Chris Lattner } else if (SGV->hasWeakLinkage() || SGV->hasLinkOnceLinkage()) { 45572ac148d4964fbff950fe11a0eeeda73973b849bChris Lattner // At this point we know that DGV has LinkOnce, Appending, Weak, or 45672ac148d4964fbff950fe11a0eeeda73973b849bChris Lattner // External linkage. If DGV is Appending, this is an error. 45772ac148d4964fbff950fe11a0eeeda73973b849bChris Lattner if (DGV->hasAppendingLinkage()) 45872ac148d4964fbff950fe11a0eeeda73973b849bChris Lattner return Error(Err, "Linking globals named '" + SGV->getName() + 45972ac148d4964fbff950fe11a0eeeda73973b849bChris Lattner " ' with 'weak' and 'appending' linkage is not allowed!"); 46035956558e26e655aaa2e8ad6ee405365271869a4Chris Lattner 46135956558e26e655aaa2e8ad6ee405365271869a4Chris Lattner if (SGV->isConstant() != DGV->isConstant()) 46235956558e26e655aaa2e8ad6ee405365271869a4Chris Lattner return Error(Err, "Global Variable Collision on '" + 46335956558e26e655aaa2e8ad6ee405365271869a4Chris Lattner SGV->getType()->getDescription() + " %" + SGV->getName() + 46435956558e26e655aaa2e8ad6ee405365271869a4Chris Lattner "' - Global variables differ in const'ness"); 46535956558e26e655aaa2e8ad6ee405365271869a4Chris Lattner 46672ac148d4964fbff950fe11a0eeeda73973b849bChris Lattner // Otherwise, just perform the link. 46772ac148d4964fbff950fe11a0eeeda73973b849bChris Lattner ValueMap.insert(std::make_pair(SGV, DGV)); 46835956558e26e655aaa2e8ad6ee405365271869a4Chris Lattner 46935956558e26e655aaa2e8ad6ee405365271869a4Chris Lattner // Linkonce+Weak = Weak 47035956558e26e655aaa2e8ad6ee405365271869a4Chris Lattner if (DGV->hasLinkOnceLinkage() && SGV->hasWeakLinkage()) 47135956558e26e655aaa2e8ad6ee405365271869a4Chris Lattner DGV->setLinkage(SGV->getLinkage()); 47235956558e26e655aaa2e8ad6ee405365271869a4Chris Lattner 47335956558e26e655aaa2e8ad6ee405365271869a4Chris Lattner } else if (DGV->hasWeakLinkage() || DGV->hasLinkOnceLinkage()) { 47472ac148d4964fbff950fe11a0eeeda73973b849bChris Lattner // At this point we know that SGV has LinkOnce, Appending, or External 47572ac148d4964fbff950fe11a0eeeda73973b849bChris Lattner // linkage. If SGV is Appending, this is an error. 47672ac148d4964fbff950fe11a0eeeda73973b849bChris Lattner if (SGV->hasAppendingLinkage()) 47772ac148d4964fbff950fe11a0eeeda73973b849bChris Lattner return Error(Err, "Linking globals named '" + SGV->getName() + 47872ac148d4964fbff950fe11a0eeeda73973b849bChris Lattner " ' with 'weak' and 'appending' linkage is not allowed!"); 47935956558e26e655aaa2e8ad6ee405365271869a4Chris Lattner 48035956558e26e655aaa2e8ad6ee405365271869a4Chris Lattner if (SGV->isConstant() != DGV->isConstant()) 48135956558e26e655aaa2e8ad6ee405365271869a4Chris Lattner return Error(Err, "Global Variable Collision on '" + 48235956558e26e655aaa2e8ad6ee405365271869a4Chris Lattner SGV->getType()->getDescription() + " %" + SGV->getName() + 48335956558e26e655aaa2e8ad6ee405365271869a4Chris Lattner "' - Global variables differ in const'ness"); 48435956558e26e655aaa2e8ad6ee405365271869a4Chris Lattner 48572ac148d4964fbff950fe11a0eeeda73973b849bChris Lattner if (!SGV->hasLinkOnceLinkage()) 48672ac148d4964fbff950fe11a0eeeda73973b849bChris Lattner DGV->setLinkage(SGV->getLinkage()); // Inherit linkage! 48772ac148d4964fbff950fe11a0eeeda73973b849bChris Lattner ValueMap.insert(std::make_pair(SGV, DGV)); 48872ac148d4964fbff950fe11a0eeeda73973b849bChris Lattner 489c2b97d43a074445c6856d69538a95de09450c26eChris Lattner } else if (SGV->getLinkage() != DGV->getLinkage()) { 4904ad02e726d9b634372b037d4b352d8b63bb9e849Chris Lattner return Error(Err, "Global variables named '" + SGV->getName() + 4914ad02e726d9b634372b037d4b352d8b63bb9e849Chris Lattner "' have different linkage specifiers!"); 492c2b97d43a074445c6856d69538a95de09450c26eChris Lattner } else if (SGV->hasExternalLinkage()) { 493c2b97d43a074445c6856d69538a95de09450c26eChris Lattner // Allow linking two exactly identical external global variables... 494f85770c9a670dc5c360015125389c389ae9592c7Chris Lattner if (SGV->isConstant() != DGV->isConstant()) 495c2b97d43a074445c6856d69538a95de09450c26eChris Lattner return Error(Err, "Global Variable Collision on '" + 496c2b97d43a074445c6856d69538a95de09450c26eChris Lattner SGV->getType()->getDescription() + " %" + SGV->getName() + 497c2b97d43a074445c6856d69538a95de09450c26eChris Lattner "' - Global variables differ in const'ness"); 498f85770c9a670dc5c360015125389c389ae9592c7Chris Lattner 499f85770c9a670dc5c360015125389c389ae9592c7Chris Lattner if (SGV->getInitializer() != DGV->getInitializer()) 500f85770c9a670dc5c360015125389c389ae9592c7Chris Lattner return Error(Err, "Global Variable Collision on '" + 501f85770c9a670dc5c360015125389c389ae9592c7Chris Lattner SGV->getType()->getDescription() + " %" + SGV->getName() + 502f85770c9a670dc5c360015125389c389ae9592c7Chris Lattner "' - External linkage globals have different initializers"); 503f85770c9a670dc5c360015125389c389ae9592c7Chris Lattner 504c2b97d43a074445c6856d69538a95de09450c26eChris Lattner ValueMap.insert(std::make_pair(SGV, DGV)); 505c2b97d43a074445c6856d69538a95de09450c26eChris Lattner } else if (SGV->hasAppendingLinkage()) { 5068166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner // No linking is performed yet. Just insert a new copy of the global, and 5078166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner // keep track of the fact that it is an appending variable in the 5088166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner // AppendingVars map. The name is cleared out so that no linkage is 5098166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner // performed. 5108166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner GlobalVariable *NewDGV = 5118166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner new GlobalVariable(SGV->getType()->getElementType(), 5128166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner SGV->isConstant(), SGV->getLinkage(), /*init*/0, 5138166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner "", Dest); 5148166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner 5158166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner // Make sure to remember this mapping... 5168166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner ValueMap.insert(std::make_pair(SGV, NewDGV)); 5178166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner 5188166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner // Keep track that this is an appending variable... 5198166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner AppendingVars.insert(std::make_pair(SGV->getName(), NewDGV)); 5204ad02e726d9b634372b037d4b352d8b63bb9e849Chris Lattner } else { 5214ad02e726d9b634372b037d4b352d8b63bb9e849Chris Lattner assert(0 && "Unknown linkage!"); 5225c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner } 5235c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner } 5245c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner return false; 5255c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner} 5265c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner 5275c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner 5288d2de8a82cce67513debee7a3fa5aca0189b4105Chris Lattner// LinkGlobalInits - Update the initializers in the Dest module now that all 5298d2de8a82cce67513debee7a3fa5aca0189b4105Chris Lattner// globals that may be referenced are in Dest. 5308d2de8a82cce67513debee7a3fa5aca0189b4105Chris Lattner// 5318d2de8a82cce67513debee7a3fa5aca0189b4105Chris Lattnerstatic bool LinkGlobalInits(Module *Dest, const Module *Src, 5325c2d335d86579941b71816196a95a64b277e8963Chris Lattner std::map<const Value*, Value*> &ValueMap, 5335c2d335d86579941b71816196a95a64b277e8963Chris Lattner std::string *Err) { 5348d2de8a82cce67513debee7a3fa5aca0189b4105Chris Lattner 5358d2de8a82cce67513debee7a3fa5aca0189b4105Chris Lattner // Loop over all of the globals in the src module, mapping them over as we go 5368d2de8a82cce67513debee7a3fa5aca0189b4105Chris Lattner // 5378d2de8a82cce67513debee7a3fa5aca0189b4105Chris Lattner for (Module::const_giterator I = Src->gbegin(), E = Src->gend(); I != E; ++I){ 53818961504fc2b299578dba817900a0696cf3ccc4dChris Lattner const GlobalVariable *SGV = I; 5398d2de8a82cce67513debee7a3fa5aca0189b4105Chris Lattner 5408d2de8a82cce67513debee7a3fa5aca0189b4105Chris Lattner if (SGV->hasInitializer()) { // Only process initialized GV's 5418d2de8a82cce67513debee7a3fa5aca0189b4105Chris Lattner // Figure out what the initializer looks like in the dest module... 5424ad02e726d9b634372b037d4b352d8b63bb9e849Chris Lattner Constant *SInit = 5432f6bb2bce13084dfc4c8acf47f9eae0578267aaaChris Lattner cast<Constant>(RemapOperand(SGV->getInitializer(), ValueMap, 0)); 5448d2de8a82cce67513debee7a3fa5aca0189b4105Chris Lattner 5458d2de8a82cce67513debee7a3fa5aca0189b4105Chris Lattner GlobalVariable *DGV = cast<GlobalVariable>(ValueMap[SGV]); 5464ad02e726d9b634372b037d4b352d8b63bb9e849Chris Lattner if (DGV->hasInitializer()) { 5474ad02e726d9b634372b037d4b352d8b63bb9e849Chris Lattner if (SGV->hasExternalLinkage()) { 5484ad02e726d9b634372b037d4b352d8b63bb9e849Chris Lattner if (DGV->getInitializer() != SInit) 5494ad02e726d9b634372b037d4b352d8b63bb9e849Chris Lattner return Error(Err, "Global Variable Collision on '" + 5504ad02e726d9b634372b037d4b352d8b63bb9e849Chris Lattner SGV->getType()->getDescription() +"':%"+SGV->getName()+ 5514ad02e726d9b634372b037d4b352d8b63bb9e849Chris Lattner " - Global variables have different initializers"); 55272ac148d4964fbff950fe11a0eeeda73973b849bChris Lattner } else if (DGV->hasLinkOnceLinkage() || DGV->hasWeakLinkage()) { 5534ad02e726d9b634372b037d4b352d8b63bb9e849Chris Lattner // Nothing is required, mapped values will take the new global 5544ad02e726d9b634372b037d4b352d8b63bb9e849Chris Lattner // automatically. 55557cb9883aa4c82357594d4186858f175135be3b1Chris Lattner } else if (SGV->hasLinkOnceLinkage() || SGV->hasWeakLinkage()) { 55657cb9883aa4c82357594d4186858f175135be3b1Chris Lattner // Nothing is required, mapped values will take the new global 55757cb9883aa4c82357594d4186858f175135be3b1Chris Lattner // automatically. 5584ad02e726d9b634372b037d4b352d8b63bb9e849Chris Lattner } else if (DGV->hasAppendingLinkage()) { 5594ad02e726d9b634372b037d4b352d8b63bb9e849Chris Lattner assert(0 && "Appending linkage unimplemented!"); 5604ad02e726d9b634372b037d4b352d8b63bb9e849Chris Lattner } else { 5614ad02e726d9b634372b037d4b352d8b63bb9e849Chris Lattner assert(0 && "Unknown linkage!"); 5624ad02e726d9b634372b037d4b352d8b63bb9e849Chris Lattner } 5638d2de8a82cce67513debee7a3fa5aca0189b4105Chris Lattner } else { 5648d2de8a82cce67513debee7a3fa5aca0189b4105Chris Lattner // Copy the initializer over now... 5654ad02e726d9b634372b037d4b352d8b63bb9e849Chris Lattner DGV->setInitializer(SInit); 5668d2de8a82cce67513debee7a3fa5aca0189b4105Chris Lattner } 5678d2de8a82cce67513debee7a3fa5aca0189b4105Chris Lattner } 5688d2de8a82cce67513debee7a3fa5aca0189b4105Chris Lattner } 5698d2de8a82cce67513debee7a3fa5aca0189b4105Chris Lattner return false; 5708d2de8a82cce67513debee7a3fa5aca0189b4105Chris Lattner} 5715c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner 57279df7c0aaa18129e55968c8783ef8346807bd4afChris Lattner// LinkFunctionProtos - Link the functions together between the two modules, 573c8cc4cb03bd90f89be7fe1649542a2d5ae689632Chris Lattner// without doing function bodies... this just adds external function prototypes 574c8cc4cb03bd90f89be7fe1649542a2d5ae689632Chris Lattner// to the Dest function... 5755c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner// 57679df7c0aaa18129e55968c8783ef8346807bd4afChris Lattnerstatic bool LinkFunctionProtos(Module *Dest, const Module *Src, 5775c2d335d86579941b71816196a95a64b277e8963Chris Lattner std::map<const Value*, Value*> &ValueMap, 5785a837defff581accc09048bea1cd839009e374a7Chris Lattner std::map<std::string, GlobalValue*> &GlobalsByName, 5795c2d335d86579941b71816196a95a64b277e8963Chris Lattner std::string *Err) { 580b91b657e026e86082b665cc875c2881ed075b68dChris Lattner SymbolTable *ST = (SymbolTable*)&Dest->getSymbolTable(); 5815c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner 582c8cc4cb03bd90f89be7fe1649542a2d5ae689632Chris Lattner // Loop over all of the functions in the src module, mapping them over as we 583c8cc4cb03bd90f89be7fe1649542a2d5ae689632Chris Lattner // go 5845c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner // 5855c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner for (Module::const_iterator I = Src->begin(), E = Src->end(); I != E; ++I) { 58618961504fc2b299578dba817900a0696cf3ccc4dChris Lattner const Function *SF = I; // SrcFunction 5874ad02e726d9b634372b037d4b352d8b63bb9e849Chris Lattner Function *DF = 0; 5885a837defff581accc09048bea1cd839009e374a7Chris Lattner if (SF->hasName() && !SF->hasInternalLinkage()) { 5895a837defff581accc09048bea1cd839009e374a7Chris Lattner // Check to see if may have to link the function. 5905a837defff581accc09048bea1cd839009e374a7Chris Lattner std::map<std::string, GlobalValue*>::iterator EF = 5915a837defff581accc09048bea1cd839009e374a7Chris Lattner GlobalsByName.find(SF->getName()); 5925a837defff581accc09048bea1cd839009e374a7Chris Lattner if (EF != GlobalsByName.end()) 5935a837defff581accc09048bea1cd839009e374a7Chris Lattner DF = dyn_cast<Function>(EF->second); 594868bbf35b079a7f356f6b2fbd9df7e66552bc57eChris Lattner if (DF && RecursiveResolveTypes(SF->getType(), DF->getType(), ST, "")) 595868bbf35b079a7f356f6b2fbd9df7e66552bc57eChris Lattner DF = 0; // FIXME: gross. 5965a837defff581accc09048bea1cd839009e374a7Chris Lattner } 5975c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner 5984ad02e726d9b634372b037d4b352d8b63bb9e849Chris Lattner if (!DF || SF->hasInternalLinkage() || DF->hasInternalLinkage()) { 5990fec08eb58dd9fffeb72c584aa61a59d71111c8dChris Lattner // Function does not already exist, simply insert an function signature 6000fec08eb58dd9fffeb72c584aa61a59d71111c8dChris Lattner // identical to SF into the dest module... 6012719bac90525985f4ebb97324b4c087d47b54384Chris Lattner Function *NewDF = new Function(SF->getFunctionType(), SF->getLinkage(), 6022719bac90525985f4ebb97324b4c087d47b54384Chris Lattner SF->getName(), Dest); 6032719bac90525985f4ebb97324b4c087d47b54384Chris Lattner 6042719bac90525985f4ebb97324b4c087d47b54384Chris Lattner // If the LLVM runtime renamed the function, but it is an externally 6052719bac90525985f4ebb97324b4c087d47b54384Chris Lattner // visible symbol, DF must be an existing function with internal linkage. 6062719bac90525985f4ebb97324b4c087d47b54384Chris Lattner // Rename it. 607c003628a612d3687fb77088a5894314210a65385Chris Lattner if (NewDF->getName() != SF->getName() && !NewDF->hasInternalLinkage()) 60882b5b219dd3b9035442389ddcd58e6f859aae039Chris Lattner ForceRenaming(NewDF, SF->getName()); 6094ad02e726d9b634372b037d4b352d8b63bb9e849Chris Lattner 6104ad02e726d9b634372b037d4b352d8b63bb9e849Chris Lattner // ... and remember this mapping... 6112719bac90525985f4ebb97324b4c087d47b54384Chris Lattner ValueMap.insert(std::make_pair(SF, NewDF)); 612c2b97d43a074445c6856d69538a95de09450c26eChris Lattner } else if (SF->isExternal()) { 613c2b97d43a074445c6856d69538a95de09450c26eChris Lattner // If SF is external or if both SF & DF are external.. Just link the 614c2b97d43a074445c6856d69538a95de09450c26eChris Lattner // external functions, we aren't adding anything. 615c2b97d43a074445c6856d69538a95de09450c26eChris Lattner ValueMap.insert(std::make_pair(SF, DF)); 616c2b97d43a074445c6856d69538a95de09450c26eChris Lattner } else if (DF->isExternal()) { // If DF is external but SF is not... 617c2b97d43a074445c6856d69538a95de09450c26eChris Lattner // Link the external functions, update linkage qualifiers 618c2b97d43a074445c6856d69538a95de09450c26eChris Lattner ValueMap.insert(std::make_pair(SF, DF)); 619c2b97d43a074445c6856d69538a95de09450c26eChris Lattner DF->setLinkage(SF->getLinkage()); 620c2b97d43a074445c6856d69538a95de09450c26eChris Lattner 62135956558e26e655aaa2e8ad6ee405365271869a4Chris Lattner } else if (SF->hasWeakLinkage() || SF->hasLinkOnceLinkage()) { 62272ac148d4964fbff950fe11a0eeeda73973b849bChris Lattner // At this point we know that DF has LinkOnce, Weak, or External linkage. 62372ac148d4964fbff950fe11a0eeeda73973b849bChris Lattner ValueMap.insert(std::make_pair(SF, DF)); 62472ac148d4964fbff950fe11a0eeeda73973b849bChris Lattner 62535956558e26e655aaa2e8ad6ee405365271869a4Chris Lattner // Linkonce+Weak = Weak 62635956558e26e655aaa2e8ad6ee405365271869a4Chris Lattner if (DF->hasLinkOnceLinkage() && SF->hasWeakLinkage()) 62735956558e26e655aaa2e8ad6ee405365271869a4Chris Lattner DF->setLinkage(SF->getLinkage()); 62835956558e26e655aaa2e8ad6ee405365271869a4Chris Lattner 62935956558e26e655aaa2e8ad6ee405365271869a4Chris Lattner } else if (DF->hasWeakLinkage() || DF->hasLinkOnceLinkage()) { 63072ac148d4964fbff950fe11a0eeeda73973b849bChris Lattner // At this point we know that SF has LinkOnce or External linkage. 63172ac148d4964fbff950fe11a0eeeda73973b849bChris Lattner ValueMap.insert(std::make_pair(SF, DF)); 63272ac148d4964fbff950fe11a0eeeda73973b849bChris Lattner if (!SF->hasLinkOnceLinkage()) // Don't inherit linkonce linkage 63372ac148d4964fbff950fe11a0eeeda73973b849bChris Lattner DF->setLinkage(SF->getLinkage()); 63472ac148d4964fbff950fe11a0eeeda73973b849bChris Lattner 635c2b97d43a074445c6856d69538a95de09450c26eChris Lattner } else if (SF->getLinkage() != DF->getLinkage()) { 6360fec08eb58dd9fffeb72c584aa61a59d71111c8dChris Lattner return Error(Err, "Functions named '" + SF->getName() + 6370fec08eb58dd9fffeb72c584aa61a59d71111c8dChris Lattner "' have different linkage specifiers!"); 638c2b97d43a074445c6856d69538a95de09450c26eChris Lattner } else if (SF->hasExternalLinkage()) { 639c2b97d43a074445c6856d69538a95de09450c26eChris Lattner // The function is defined in both modules!! 640c2b97d43a074445c6856d69538a95de09450c26eChris Lattner return Error(Err, "Function '" + 641c2b97d43a074445c6856d69538a95de09450c26eChris Lattner SF->getFunctionType()->getDescription() + "':\"" + 642c2b97d43a074445c6856d69538a95de09450c26eChris Lattner SF->getName() + "\" - Function is already defined!"); 643c2b97d43a074445c6856d69538a95de09450c26eChris Lattner } else { 644c2b97d43a074445c6856d69538a95de09450c26eChris Lattner assert(0 && "Unknown linkage configuration found!"); 6455c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner } 6465c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner } 6475c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner return false; 6485c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner} 6495c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner 650c8cc4cb03bd90f89be7fe1649542a2d5ae689632Chris Lattner// LinkFunctionBody - Copy the source function over into the dest function and 651c8cc4cb03bd90f89be7fe1649542a2d5ae689632Chris Lattner// fix up references to values. At this point we know that Dest is an external 652c8cc4cb03bd90f89be7fe1649542a2d5ae689632Chris Lattner// function, and that Src is not. 6535c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner// 65479df7c0aaa18129e55968c8783ef8346807bd4afChris Lattnerstatic bool LinkFunctionBody(Function *Dest, const Function *Src, 6555c2d335d86579941b71816196a95a64b277e8963Chris Lattner std::map<const Value*, Value*> &GlobalMap, 6565c2d335d86579941b71816196a95a64b277e8963Chris Lattner std::string *Err) { 6575c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner assert(Src && Dest && Dest->isExternal() && !Src->isExternal()); 6585c2d335d86579941b71816196a95a64b277e8963Chris Lattner std::map<const Value*, Value*> LocalMap; // Map for function local values 6595c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner 660c8cc4cb03bd90f89be7fe1649542a2d5ae689632Chris Lattner // Go through and convert function arguments over... 66169da5cf26143e4542d4bf8c78ffac6d079efe5c9Chris Lattner Function::aiterator DI = Dest->abegin(); 66218961504fc2b299578dba817900a0696cf3ccc4dChris Lattner for (Function::const_aiterator I = Src->abegin(), E = Src->aend(); 66369da5cf26143e4542d4bf8c78ffac6d079efe5c9Chris Lattner I != E; ++I, ++DI) { 66469da5cf26143e4542d4bf8c78ffac6d079efe5c9Chris Lattner DI->setName(I->getName()); // Copy the name information over... 6655c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner 6665c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner // Add a mapping to our local map 66769da5cf26143e4542d4bf8c78ffac6d079efe5c9Chris Lattner LocalMap.insert(std::make_pair(I, DI)); 6685c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner } 6695c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner 6705c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner // Loop over all of the basic blocks, copying the instructions over... 6715c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner // 67279df7c0aaa18129e55968c8783ef8346807bd4afChris Lattner for (Function::const_iterator I = Src->begin(), E = Src->end(); I != E; ++I) { 673c8cc4cb03bd90f89be7fe1649542a2d5ae689632Chris Lattner // Create new basic block and add to mapping and the Dest function... 67418961504fc2b299578dba817900a0696cf3ccc4dChris Lattner BasicBlock *DBB = new BasicBlock(I->getName(), Dest); 67518961504fc2b299578dba817900a0696cf3ccc4dChris Lattner LocalMap.insert(std::make_pair(I, DBB)); 6765c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner 6775c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner // Loop over all of the instructions in the src basic block, copying them 6785c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner // over. Note that this is broken in a strict sense because the cloned 6795c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner // instructions will still be referencing values in the Src module, not 6805c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner // the remapped values. In our case, however, we will not get caught and 6815c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner // so we can delay patching the values up until later... 6825c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner // 68318961504fc2b299578dba817900a0696cf3ccc4dChris Lattner for (BasicBlock::const_iterator II = I->begin(), IE = I->end(); 6845c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner II != IE; ++II) { 68518961504fc2b299578dba817900a0696cf3ccc4dChris Lattner Instruction *DI = II->clone(); 68618961504fc2b299578dba817900a0696cf3ccc4dChris Lattner DI->setName(II->getName()); 6875c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner DBB->getInstList().push_back(DI); 68818961504fc2b299578dba817900a0696cf3ccc4dChris Lattner LocalMap.insert(std::make_pair(II, DI)); 6895c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner } 6905c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner } 6915c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner 692c8cc4cb03bd90f89be7fe1649542a2d5ae689632Chris Lattner // At this point, all of the instructions and values of the function are now 693c8cc4cb03bd90f89be7fe1649542a2d5ae689632Chris Lattner // copied over. The only problem is that they are still referencing values in 694c8cc4cb03bd90f89be7fe1649542a2d5ae689632Chris Lattner // the Source function as operands. Loop through all of the operands of the 695c8cc4cb03bd90f89be7fe1649542a2d5ae689632Chris Lattner // functions and patch them up to point to the local versions... 6965c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner // 69718961504fc2b299578dba817900a0696cf3ccc4dChris Lattner for (Function::iterator BB = Dest->begin(), BE = Dest->end(); BB != BE; ++BB) 69818961504fc2b299578dba817900a0696cf3ccc4dChris Lattner for (BasicBlock::iterator I = BB->begin(), E = BB->end(); I != E; ++I) 69918961504fc2b299578dba817900a0696cf3ccc4dChris Lattner for (Instruction::op_iterator OI = I->op_begin(), OE = I->op_end(); 700221d688a5ef21a22c2368c9fff0e92d7966c95e5Chris Lattner OI != OE; ++OI) 701221d688a5ef21a22c2368c9fff0e92d7966c95e5Chris Lattner *OI = RemapOperand(*OI, LocalMap, &GlobalMap); 7025c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner 7035c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner return false; 7045c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner} 7055c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner 7065c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner 707c8cc4cb03bd90f89be7fe1649542a2d5ae689632Chris Lattner// LinkFunctionBodies - Link in the function bodies that are defined in the 708c8cc4cb03bd90f89be7fe1649542a2d5ae689632Chris Lattner// source module into the DestModule. This consists basically of copying the 709c8cc4cb03bd90f89be7fe1649542a2d5ae689632Chris Lattner// function over and fixing up references to values. 7105c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner// 71179df7c0aaa18129e55968c8783ef8346807bd4afChris Lattnerstatic bool LinkFunctionBodies(Module *Dest, const Module *Src, 7125c2d335d86579941b71816196a95a64b277e8963Chris Lattner std::map<const Value*, Value*> &ValueMap, 7135c2d335d86579941b71816196a95a64b277e8963Chris Lattner std::string *Err) { 7145c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner 715c8cc4cb03bd90f89be7fe1649542a2d5ae689632Chris Lattner // Loop over all of the functions in the src module, mapping them over as we 716c8cc4cb03bd90f89be7fe1649542a2d5ae689632Chris Lattner // go 7175c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner // 71818961504fc2b299578dba817900a0696cf3ccc4dChris Lattner for (Module::const_iterator SF = Src->begin(), E = Src->end(); SF != E; ++SF){ 71918961504fc2b299578dba817900a0696cf3ccc4dChris Lattner if (!SF->isExternal()) { // No body if function is external 72018961504fc2b299578dba817900a0696cf3ccc4dChris Lattner Function *DF = cast<Function>(ValueMap[SF]); // Destination function 721c2d774b6c1d38421c435b6d3cfaa10402c900aebChris Lattner 72218961504fc2b299578dba817900a0696cf3ccc4dChris Lattner // DF not external SF external? 72335956558e26e655aaa2e8ad6ee405365271869a4Chris Lattner if (DF->isExternal()) { 72435956558e26e655aaa2e8ad6ee405365271869a4Chris Lattner // Only provide the function body if there isn't one already. 72535956558e26e655aaa2e8ad6ee405365271869a4Chris Lattner if (LinkFunctionBody(DF, SF, ValueMap, Err)) 72635956558e26e655aaa2e8ad6ee405365271869a4Chris Lattner return true; 727c2d774b6c1d38421c435b6d3cfaa10402c900aebChris Lattner } 728c2d774b6c1d38421c435b6d3cfaa10402c900aebChris Lattner } 7295c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner } 7305c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner return false; 7315c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner} 7325c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner 7338166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner// LinkAppendingVars - If there were any appending global variables, link them 7348166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner// together now. Return true on error. 7358166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner// 7368166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattnerstatic bool LinkAppendingVars(Module *M, 7378166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner std::multimap<std::string, GlobalVariable *> &AppendingVars, 7388166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner std::string *ErrorMsg) { 7398166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner if (AppendingVars.empty()) return false; // Nothing to do. 7408166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner 7418166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner // Loop over the multimap of appending vars, processing any variables with the 7428166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner // same name, forming a new appending global variable with both of the 7438166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner // initializers merged together, then rewrite references to the old variables 7448166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner // and delete them. 7458166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner // 7468166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner std::vector<Constant*> Inits; 7478166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner while (AppendingVars.size() > 1) { 7488166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner // Get the first two elements in the map... 7498166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner std::multimap<std::string, 7508166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner GlobalVariable*>::iterator Second = AppendingVars.begin(), First=Second++; 7518166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner 7528166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner // If the first two elements are for different names, there is no pair... 7538166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner // Otherwise there is a pair, so link them together... 7548166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner if (First->first == Second->first) { 7558166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner GlobalVariable *G1 = First->second, *G2 = Second->second; 7568166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner const ArrayType *T1 = cast<ArrayType>(G1->getType()->getElementType()); 7578166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner const ArrayType *T2 = cast<ArrayType>(G2->getType()->getElementType()); 7588166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner 7598166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner // Check to see that they two arrays agree on type... 7608166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner if (T1->getElementType() != T2->getElementType()) 7618166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner return Error(ErrorMsg, 7628166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner "Appending variables with different element types need to be linked!"); 7638166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner if (G1->isConstant() != G2->isConstant()) 7648166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner return Error(ErrorMsg, 7658166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner "Appending variables linked with different const'ness!"); 7668166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner 7678166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner unsigned NewSize = T1->getNumElements() + T2->getNumElements(); 7688166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner ArrayType *NewType = ArrayType::get(T1->getElementType(), NewSize); 7698166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner 7708166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner // Create the new global variable... 7718166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner GlobalVariable *NG = 7728166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner new GlobalVariable(NewType, G1->isConstant(), G1->getLinkage(), 7738166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner /*init*/0, First->first, M); 7748166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner 7758166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner // Merge the initializer... 7768166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner Inits.reserve(NewSize); 777de512b5b2edebe9c9021a92c7c7a9ae9fbc380d6Chris Lattner if (ConstantArray *I = dyn_cast<ConstantArray>(G1->getInitializer())) { 778de512b5b2edebe9c9021a92c7c7a9ae9fbc380d6Chris Lattner for (unsigned i = 0, e = T1->getNumElements(); i != e; ++i) 779cc7ba49d85b66955516ff0d9574a70e1637dea36Alkis Evlogimenos Inits.push_back(I->getOperand(i)); 780de512b5b2edebe9c9021a92c7c7a9ae9fbc380d6Chris Lattner } else { 781de512b5b2edebe9c9021a92c7c7a9ae9fbc380d6Chris Lattner assert(isa<ConstantAggregateZero>(G1->getInitializer())); 782de512b5b2edebe9c9021a92c7c7a9ae9fbc380d6Chris Lattner Constant *CV = Constant::getNullValue(T1->getElementType()); 783de512b5b2edebe9c9021a92c7c7a9ae9fbc380d6Chris Lattner for (unsigned i = 0, e = T1->getNumElements(); i != e; ++i) 784de512b5b2edebe9c9021a92c7c7a9ae9fbc380d6Chris Lattner Inits.push_back(CV); 785de512b5b2edebe9c9021a92c7c7a9ae9fbc380d6Chris Lattner } 786de512b5b2edebe9c9021a92c7c7a9ae9fbc380d6Chris Lattner if (ConstantArray *I = dyn_cast<ConstantArray>(G2->getInitializer())) { 787de512b5b2edebe9c9021a92c7c7a9ae9fbc380d6Chris Lattner for (unsigned i = 0, e = T2->getNumElements(); i != e; ++i) 788cc7ba49d85b66955516ff0d9574a70e1637dea36Alkis Evlogimenos Inits.push_back(I->getOperand(i)); 789de512b5b2edebe9c9021a92c7c7a9ae9fbc380d6Chris Lattner } else { 790de512b5b2edebe9c9021a92c7c7a9ae9fbc380d6Chris Lattner assert(isa<ConstantAggregateZero>(G2->getInitializer())); 791de512b5b2edebe9c9021a92c7c7a9ae9fbc380d6Chris Lattner Constant *CV = Constant::getNullValue(T2->getElementType()); 792de512b5b2edebe9c9021a92c7c7a9ae9fbc380d6Chris Lattner for (unsigned i = 0, e = T2->getNumElements(); i != e; ++i) 793de512b5b2edebe9c9021a92c7c7a9ae9fbc380d6Chris Lattner Inits.push_back(CV); 794de512b5b2edebe9c9021a92c7c7a9ae9fbc380d6Chris Lattner } 7958166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner NG->setInitializer(ConstantArray::get(NewType, Inits)); 7968166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner Inits.clear(); 7978166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner 7988166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner // Replace any uses of the two global variables with uses of the new 7998166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner // global... 8008166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner 8018166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner // FIXME: This should rewrite simple/straight-forward uses such as 8028166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner // getelementptr instructions to not use the Cast! 80300dc4796132933e76fe2b834ca087e42621c175aReid Spencer G1->replaceAllUsesWith(ConstantExpr::getCast(NG, G1->getType())); 80400dc4796132933e76fe2b834ca087e42621c175aReid Spencer G2->replaceAllUsesWith(ConstantExpr::getCast(NG, G2->getType())); 8058166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner 8068166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner // Remove the two globals from the module now... 8078166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner M->getGlobalList().erase(G1); 8088166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner M->getGlobalList().erase(G2); 8098166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner 8108166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner // Put the new global into the AppendingVars map so that we can handle 8118166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner // linking of more than two vars... 8128166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner Second->second = NG; 8138166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner } 8148166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner AppendingVars.erase(First); 8158166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner } 8168166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner 8178166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner return false; 8188166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner} 81952f7e908cb634f9b9b539d5c6670b8a065478915Chris Lattner 82052f7e908cb634f9b9b539d5c6670b8a065478915Chris Lattner 82152f7e908cb634f9b9b539d5c6670b8a065478915Chris Lattner// LinkModules - This function links two modules together, with the resulting 82252f7e908cb634f9b9b539d5c6670b8a065478915Chris Lattner// left module modified to be the composite of the two input modules. If an 82352f7e908cb634f9b9b539d5c6670b8a065478915Chris Lattner// error occurs, true is returned and ErrorMsg (if not null) is set to indicate 8245c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner// the problem. Upon failure, the Dest module could be in a modified state, and 8255c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner// shouldn't be relied on to be consistent. 82652f7e908cb634f9b9b539d5c6670b8a065478915Chris Lattner// 827f7703df4968084c18c248c1feea9961c19a32e6aChris Lattnerbool llvm::LinkModules(Module *Dest, const Module *Src, std::string *ErrorMsg) { 828873c5e7859c1534bf92c9e2747f2b70685059598Chris Lattner if (Dest->getEndianness() == Module::AnyEndianness) 829873c5e7859c1534bf92c9e2747f2b70685059598Chris Lattner Dest->setEndianness(Src->getEndianness()); 830873c5e7859c1534bf92c9e2747f2b70685059598Chris Lattner if (Dest->getPointerSize() == Module::AnyPointerSize) 831873c5e7859c1534bf92c9e2747f2b70685059598Chris Lattner Dest->setPointerSize(Src->getPointerSize()); 832873c5e7859c1534bf92c9e2747f2b70685059598Chris Lattner 833873c5e7859c1534bf92c9e2747f2b70685059598Chris Lattner if (Src->getEndianness() != Module::AnyEndianness && 834873c5e7859c1534bf92c9e2747f2b70685059598Chris Lattner Dest->getEndianness() != Src->getEndianness()) 83543a9994c0164848d44527060da72985c75183a48Chris Lattner std::cerr << "WARNING: Linking two modules of different endianness!\n"; 836873c5e7859c1534bf92c9e2747f2b70685059598Chris Lattner if (Src->getPointerSize() != Module::AnyPointerSize && 837873c5e7859c1534bf92c9e2747f2b70685059598Chris Lattner Dest->getPointerSize() != Src->getPointerSize()) 83843a9994c0164848d44527060da72985c75183a48Chris Lattner std::cerr << "WARNING: Linking two modules of different pointer size!\n"; 8392c236f3e20a0fb84b5948efa6bb7bb60d759cb32Chris Lattner 8402c236f3e20a0fb84b5948efa6bb7bb60d759cb32Chris Lattner // LinkTypes - Go through the symbol table of the Src module and see if any 8412c236f3e20a0fb84b5948efa6bb7bb60d759cb32Chris Lattner // types are named in the src module that are not named in the Dst module. 8422c236f3e20a0fb84b5948efa6bb7bb60d759cb32Chris Lattner // Make sure there are no type name conflicts. 8432c236f3e20a0fb84b5948efa6bb7bb60d759cb32Chris Lattner // 8442c236f3e20a0fb84b5948efa6bb7bb60d759cb32Chris Lattner if (LinkTypes(Dest, Src, ErrorMsg)) return true; 8452c236f3e20a0fb84b5948efa6bb7bb60d759cb32Chris Lattner 8465c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner // ValueMap - Mapping of values from what they used to be in Src, to what they 8475c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner // are now in Dest. 8485c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner // 8495c2d335d86579941b71816196a95a64b277e8963Chris Lattner std::map<const Value*, Value*> ValueMap; 8505c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner 8518166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner // AppendingVars - Keep track of global variables in the destination module 8528166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner // with appending linkage. After the module is linked together, they are 8538166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner // appended and the module is rewritten. 8548166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner // 8558166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner std::multimap<std::string, GlobalVariable *> AppendingVars; 8568166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner 8575a837defff581accc09048bea1cd839009e374a7Chris Lattner // GlobalsByName - The LLVM SymbolTable class fights our best efforts at 8585a837defff581accc09048bea1cd839009e374a7Chris Lattner // linking by separating globals by type. Until PR411 is fixed, we replicate 8595a837defff581accc09048bea1cd839009e374a7Chris Lattner // it's functionality here. 8605a837defff581accc09048bea1cd839009e374a7Chris Lattner std::map<std::string, GlobalValue*> GlobalsByName; 8615a837defff581accc09048bea1cd839009e374a7Chris Lattner 8625a837defff581accc09048bea1cd839009e374a7Chris Lattner for (Module::giterator I = Dest->gbegin(), E = Dest->gend(); I != E; ++I) { 8635a837defff581accc09048bea1cd839009e374a7Chris Lattner // Add all of the appending globals already in the Dest module to 8645a837defff581accc09048bea1cd839009e374a7Chris Lattner // AppendingVars. 865f41464618f41b92cf0a0bd14ccc57bce727fb33dChris Lattner if (I->hasAppendingLinkage()) 866f41464618f41b92cf0a0bd14ccc57bce727fb33dChris Lattner AppendingVars.insert(std::make_pair(I->getName(), I)); 8678166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner 8685a837defff581accc09048bea1cd839009e374a7Chris Lattner // Keep track of all globals by name. 8695a837defff581accc09048bea1cd839009e374a7Chris Lattner if (!I->hasInternalLinkage() && I->hasName()) 8705a837defff581accc09048bea1cd839009e374a7Chris Lattner GlobalsByName[I->getName()] = I; 8715a837defff581accc09048bea1cd839009e374a7Chris Lattner } 8725a837defff581accc09048bea1cd839009e374a7Chris Lattner 8735a837defff581accc09048bea1cd839009e374a7Chris Lattner // Keep track of all globals by name. 8745a837defff581accc09048bea1cd839009e374a7Chris Lattner for (Module::iterator I = Dest->begin(), E = Dest->end(); I != E; ++I) 8755a837defff581accc09048bea1cd839009e374a7Chris Lattner if (!I->hasInternalLinkage() && I->hasName()) 8765a837defff581accc09048bea1cd839009e374a7Chris Lattner GlobalsByName[I->getName()] = I; 8775a837defff581accc09048bea1cd839009e374a7Chris Lattner 8788166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner // Insert all of the globals in src into the Dest module... without linking 8798166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner // initializers (which could refer to functions not yet mapped over). 8808166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner // 8815a837defff581accc09048bea1cd839009e374a7Chris Lattner if (LinkGlobals(Dest, Src, ValueMap, AppendingVars, GlobalsByName, ErrorMsg)) 8825a837defff581accc09048bea1cd839009e374a7Chris Lattner return true; 8835c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner 884c8cc4cb03bd90f89be7fe1649542a2d5ae689632Chris Lattner // Link the functions together between the two modules, without doing function 885c8cc4cb03bd90f89be7fe1649542a2d5ae689632Chris Lattner // bodies... this just adds external function prototypes to the Dest 886c8cc4cb03bd90f89be7fe1649542a2d5ae689632Chris Lattner // function... We do this so that when we begin processing function bodies, 887c8cc4cb03bd90f89be7fe1649542a2d5ae689632Chris Lattner // all of the global values that may be referenced are available in our 888c8cc4cb03bd90f89be7fe1649542a2d5ae689632Chris Lattner // ValueMap. 8895c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner // 8905a837defff581accc09048bea1cd839009e374a7Chris Lattner if (LinkFunctionProtos(Dest, Src, ValueMap, GlobalsByName, ErrorMsg)) 8915a837defff581accc09048bea1cd839009e374a7Chris Lattner return true; 8925c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner 8936cdf1971bdf88ddd9a7d46b5f5f975497d68c38eChris Lattner // Update the initializers in the Dest module now that all globals that may 8946cdf1971bdf88ddd9a7d46b5f5f975497d68c38eChris Lattner // be referenced are in Dest. 8956cdf1971bdf88ddd9a7d46b5f5f975497d68c38eChris Lattner // 8966cdf1971bdf88ddd9a7d46b5f5f975497d68c38eChris Lattner if (LinkGlobalInits(Dest, Src, ValueMap, ErrorMsg)) return true; 8976cdf1971bdf88ddd9a7d46b5f5f975497d68c38eChris Lattner 898c8cc4cb03bd90f89be7fe1649542a2d5ae689632Chris Lattner // Link in the function bodies that are defined in the source module into the 899c8cc4cb03bd90f89be7fe1649542a2d5ae689632Chris Lattner // DestModule. This consists basically of copying the function over and 900c8cc4cb03bd90f89be7fe1649542a2d5ae689632Chris Lattner // fixing up references to values. 9015c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner // 90279df7c0aaa18129e55968c8783ef8346807bd4afChris Lattner if (LinkFunctionBodies(Dest, Src, ValueMap, ErrorMsg)) return true; 90352f7e908cb634f9b9b539d5c6670b8a065478915Chris Lattner 9048166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner // If there were any appending global variables, link them together now. 9058166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner // 9068166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner if (LinkAppendingVars(Dest, AppendingVars, ErrorMsg)) return true; 9078166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner 90852f7e908cb634f9b9b539d5c6670b8a065478915Chris Lattner return false; 90952f7e908cb634f9b9b539d5c6670b8a065478915Chris Lattner} 9109466f5113ba859677a28887c3c7143065e702019Vikram S. Adve 911567bc2cc1ed4d610daceecbb4ff7f92ebde1b530Reid Spencer// vim: sw=2 912