LinkModules.cpp revision 57a0efa32240ef03ea318f9ba7680fd2b8609c6e
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" 2657a0efa32240ef03ea318f9ba7680fd2b8609c6eReid Spencer#include "llvm/System/Path.h" 27c28a224c68adf0464c275778af4bce762ad25d37Reid Spencer#include <iostream> 2872cf7df6a364c213a94d01e1f0f8d918940c8416Chris Lattner#include <sstream> 29f7703df4968084c18c248c1feea9961c19a32e6aChris Lattnerusing namespace llvm; 30d0fde30ce850b78371fd1386338350591f9ff494Brian Gaeke 315c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner// Error - Simple wrapper function to conditionally assign to E and return true. 325c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner// This just makes error return conditions a little bit simpler... 335c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner// 348166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattnerstatic inline bool Error(std::string *E, const std::string &Message) { 355c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner if (E) *E = Message; 365c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner return true; 375c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner} 385c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner 3972cf7df6a364c213a94d01e1f0f8d918940c8416Chris Lattnerstatic std::string ToStr(const Type *Ty, const Module *M) { 4072cf7df6a364c213a94d01e1f0f8d918940c8416Chris Lattner std::ostringstream OS; 4172cf7df6a364c213a94d01e1f0f8d918940c8416Chris Lattner WriteTypeSymbolic(OS, Ty, M); 4272cf7df6a364c213a94d01e1f0f8d918940c8416Chris Lattner return OS.str(); 4372cf7df6a364c213a94d01e1f0f8d918940c8416Chris Lattner} 4472cf7df6a364c213a94d01e1f0f8d918940c8416Chris Lattner 45700867bb69ae1469f2b20005a79fd133e83fd552John Criswell// 46700867bb69ae1469f2b20005a79fd133e83fd552John Criswell// Function: ResolveTypes() 47700867bb69ae1469f2b20005a79fd133e83fd552John Criswell// 48700867bb69ae1469f2b20005a79fd133e83fd552John Criswell// Description: 49700867bb69ae1469f2b20005a79fd133e83fd552John Criswell// Attempt to link the two specified types together. 50700867bb69ae1469f2b20005a79fd133e83fd552John Criswell// 51700867bb69ae1469f2b20005a79fd133e83fd552John Criswell// Inputs: 52700867bb69ae1469f2b20005a79fd133e83fd552John Criswell// DestTy - The type to which we wish to resolve. 53700867bb69ae1469f2b20005a79fd133e83fd552John Criswell// SrcTy - The original type which we want to resolve. 54700867bb69ae1469f2b20005a79fd133e83fd552John Criswell// Name - The name of the type. 55700867bb69ae1469f2b20005a79fd133e83fd552John Criswell// 56700867bb69ae1469f2b20005a79fd133e83fd552John Criswell// Outputs: 57700867bb69ae1469f2b20005a79fd133e83fd552John Criswell// DestST - The symbol table in which the new type should be placed. 58700867bb69ae1469f2b20005a79fd133e83fd552John Criswell// 59700867bb69ae1469f2b20005a79fd133e83fd552John Criswell// Return value: 60700867bb69ae1469f2b20005a79fd133e83fd552John Criswell// true - There is an error and the types cannot yet be linked. 61700867bb69ae1469f2b20005a79fd133e83fd552John Criswell// false - No errors. 624c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner// 63e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattnerstatic bool ResolveTypes(const Type *DestTy, const Type *SrcTy, 64e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner SymbolTable *DestST, const std::string &Name) { 65e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner if (DestTy == SrcTy) return false; // If already equal, noop 66e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner 674c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner // Does the type already exist in the module? 684c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner if (DestTy && !isa<OpaqueType>(DestTy)) { // Yup, the type already exists... 69e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner if (const OpaqueType *OT = dyn_cast<OpaqueType>(SrcTy)) { 70e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner const_cast<OpaqueType*>(OT)->refineAbstractTypeTo(DestTy); 714c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner } else { 724c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner return true; // Cannot link types... neither is opaque and not-equal 734c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner } 744c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner } else { // Type not in dest module. Add it now. 754c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner if (DestTy) // Type _is_ in module, just opaque... 76e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner const_cast<OpaqueType*>(cast<OpaqueType>(DestTy)) 77e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner ->refineAbstractTypeTo(SrcTy); 78fcd0234de65fc07fb06f3245b60e82bdba78c745Chris Lattner else if (!Name.empty()) 79e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner DestST->insert(Name, const_cast<Type*>(SrcTy)); 804c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner } 814c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner return false; 824c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner} 834c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner 8443f4ba8c7d19664bb5de73a7b391b67061f25d22Chris Lattnerstatic const FunctionType *getFT(const PATypeHolder &TH) { 8543f4ba8c7d19664bb5de73a7b391b67061f25d22Chris Lattner return cast<FunctionType>(TH.get()); 8643f4ba8c7d19664bb5de73a7b391b67061f25d22Chris Lattner} 879732be769e57f1dec03f046ab957053048f60e40Chris Lattnerstatic const StructType *getST(const PATypeHolder &TH) { 8843f4ba8c7d19664bb5de73a7b391b67061f25d22Chris Lattner return cast<StructType>(TH.get()); 8943f4ba8c7d19664bb5de73a7b391b67061f25d22Chris Lattner} 90e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner 91e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner// RecursiveResolveTypes - This is just like ResolveTypes, except that it 92e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner// recurses down into derived types, merging the used types if the parent types 93e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner// are compatible. 94e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner// 95e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattnerstatic bool RecursiveResolveTypesI(const PATypeHolder &DestTy, 96e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattner const PATypeHolder &SrcTy, 97e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattner SymbolTable *DestST, const std::string &Name, 98e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattner std::vector<std::pair<PATypeHolder, PATypeHolder> > &Pointers) { 9943f4ba8c7d19664bb5de73a7b391b67061f25d22Chris Lattner const Type *SrcTyT = SrcTy.get(); 10043f4ba8c7d19664bb5de73a7b391b67061f25d22Chris Lattner const Type *DestTyT = DestTy.get(); 10143f4ba8c7d19664bb5de73a7b391b67061f25d22Chris Lattner if (DestTyT == SrcTyT) return false; // If already equal, noop 102e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner 103e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner // If we found our opaque type, resolve it now! 10443f4ba8c7d19664bb5de73a7b391b67061f25d22Chris Lattner if (isa<OpaqueType>(DestTyT) || isa<OpaqueType>(SrcTyT)) 10543f4ba8c7d19664bb5de73a7b391b67061f25d22Chris Lattner return ResolveTypes(DestTyT, SrcTyT, DestST, Name); 106e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner 107e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner // Two types cannot be resolved together if they are of different primitive 108e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner // type. For example, we cannot resolve an int to a float. 109f70c22b019494723d0e706f93d6542dfaa6e73a5Chris Lattner if (DestTyT->getTypeID() != SrcTyT->getTypeID()) return true; 110e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner 111e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner // Otherwise, resolve the used type used by this derived type... 112f70c22b019494723d0e706f93d6542dfaa6e73a5Chris Lattner switch (DestTyT->getTypeID()) { 113e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner case Type::FunctionTyID: { 11443f4ba8c7d19664bb5de73a7b391b67061f25d22Chris Lattner if (cast<FunctionType>(DestTyT)->isVarArg() != 115841e00b96295a2b66cb7573e961656d28a6cb12bChris Lattner cast<FunctionType>(SrcTyT)->isVarArg() || 116841e00b96295a2b66cb7573e961656d28a6cb12bChris Lattner cast<FunctionType>(DestTyT)->getNumContainedTypes() != 117841e00b96295a2b66cb7573e961656d28a6cb12bChris Lattner cast<FunctionType>(SrcTyT)->getNumContainedTypes()) 11843f4ba8c7d19664bb5de73a7b391b67061f25d22Chris Lattner return true; 11943f4ba8c7d19664bb5de73a7b391b67061f25d22Chris Lattner for (unsigned i = 0, e = getFT(DestTy)->getNumContainedTypes(); i != e; ++i) 120e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattner if (RecursiveResolveTypesI(getFT(DestTy)->getContainedType(i), 121e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattner getFT(SrcTy)->getContainedType(i), DestST, "", 122e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattner Pointers)) 123e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner return true; 124e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner return false; 125e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner } 126e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner case Type::StructTyID: { 12743f4ba8c7d19664bb5de73a7b391b67061f25d22Chris Lattner if (getST(DestTy)->getNumContainedTypes() != 12843f4ba8c7d19664bb5de73a7b391b67061f25d22Chris Lattner getST(SrcTy)->getNumContainedTypes()) return 1; 12943f4ba8c7d19664bb5de73a7b391b67061f25d22Chris Lattner for (unsigned i = 0, e = getST(DestTy)->getNumContainedTypes(); i != e; ++i) 130e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattner if (RecursiveResolveTypesI(getST(DestTy)->getContainedType(i), 131e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattner getST(SrcTy)->getContainedType(i), DestST, "", 132e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattner Pointers)) 133e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner return true; 134e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner return false; 135e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner } 136e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner case Type::ArrayTyID: { 13743f4ba8c7d19664bb5de73a7b391b67061f25d22Chris Lattner const ArrayType *DAT = cast<ArrayType>(DestTy.get()); 13843f4ba8c7d19664bb5de73a7b391b67061f25d22Chris Lattner const ArrayType *SAT = cast<ArrayType>(SrcTy.get()); 139e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner if (DAT->getNumElements() != SAT->getNumElements()) return true; 140e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattner return RecursiveResolveTypesI(DAT->getElementType(), SAT->getElementType(), 141e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattner DestST, "", Pointers); 142e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattner } 143e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattner case Type::PointerTyID: { 144e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattner // If this is a pointer type, check to see if we have already seen it. If 145e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattner // so, we are in a recursive branch. Cut off the search now. We cannot use 146e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattner // an associative container for this search, because the type pointers (keys 147e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattner // in the container) change whenever types get resolved... 148e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattner // 149e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattner for (unsigned i = 0, e = Pointers.size(); i != e; ++i) 150e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattner if (Pointers[i].first == DestTy) 151e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattner return Pointers[i].second != SrcTy; 152e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattner 153e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattner // Otherwise, add the current pointers to the vector to stop recursion on 154e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattner // this pair. 155e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattner Pointers.push_back(std::make_pair(DestTyT, SrcTyT)); 156e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattner bool Result = 157e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattner RecursiveResolveTypesI(cast<PointerType>(DestTy.get())->getElementType(), 158e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattner cast<PointerType>(SrcTy.get())->getElementType(), 159e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattner DestST, "", Pointers); 160e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattner Pointers.pop_back(); 161e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattner return Result; 162e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner } 163e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner default: assert(0 && "Unexpected type!"); return true; 164e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner } 165e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner} 166e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner 167e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattnerstatic bool RecursiveResolveTypes(const PATypeHolder &DestTy, 168e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattner const PATypeHolder &SrcTy, 169e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattner SymbolTable *DestST, const std::string &Name){ 170e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattner std::vector<std::pair<PATypeHolder, PATypeHolder> > PointerTypes; 171e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattner return RecursiveResolveTypesI(DestTy, SrcTy, DestST, Name, PointerTypes); 172e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattner} 173e3092c94ad2e3af96f37a0a8186149acbbd9700aChris Lattner 174e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner 1752c236f3e20a0fb84b5948efa6bb7bb60d759cb32Chris Lattner// LinkTypes - Go through the symbol table of the Src module and see if any 1762c236f3e20a0fb84b5948efa6bb7bb60d759cb32Chris Lattner// types are named in the src module that are not named in the Dst module. 1772c236f3e20a0fb84b5948efa6bb7bb60d759cb32Chris Lattner// Make sure there are no type name conflicts. 1782c236f3e20a0fb84b5948efa6bb7bb60d759cb32Chris Lattner// 1795c2d335d86579941b71816196a95a64b277e8963Chris Lattnerstatic bool LinkTypes(Module *Dest, const Module *Src, std::string *Err) { 1806e6026b46569b01f8f6d4dcdb6c899c3a9c76b3eChris Lattner SymbolTable *DestST = &Dest->getSymbolTable(); 1816e6026b46569b01f8f6d4dcdb6c899c3a9c76b3eChris Lattner const SymbolTable *SrcST = &Src->getSymbolTable(); 1822c236f3e20a0fb84b5948efa6bb7bb60d759cb32Chris Lattner 1832c236f3e20a0fb84b5948efa6bb7bb60d759cb32Chris Lattner // Look for a type plane for Type's... 184567bc2cc1ed4d610daceecbb4ff7f92ebde1b530Reid Spencer SymbolTable::type_const_iterator TI = SrcST->type_begin(); 185567bc2cc1ed4d610daceecbb4ff7f92ebde1b530Reid Spencer SymbolTable::type_const_iterator TE = SrcST->type_end(); 186567bc2cc1ed4d610daceecbb4ff7f92ebde1b530Reid Spencer if (TI == TE) return false; // No named types, do nothing. 1872c236f3e20a0fb84b5948efa6bb7bb60d759cb32Chris Lattner 188cf00c4ab3ba308d45d98c5ccab87362cf802facbMisha Brukman // Some types cannot be resolved immediately because they depend on other 189cf00c4ab3ba308d45d98c5ccab87362cf802facbMisha Brukman // types being resolved to each other first. This contains a list of types we 190cf00c4ab3ba308d45d98c5ccab87362cf802facbMisha Brukman // are waiting to recheck. 1914c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner std::vector<std::string> DelayedTypesToResolve; 1924c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner 193567bc2cc1ed4d610daceecbb4ff7f92ebde1b530Reid Spencer for ( ; TI != TE; ++TI ) { 194567bc2cc1ed4d610daceecbb4ff7f92ebde1b530Reid Spencer const std::string &Name = TI->first; 195c28a224c68adf0464c275778af4bce762ad25d37Reid Spencer const Type *RHS = TI->second; 1962c236f3e20a0fb84b5948efa6bb7bb60d759cb32Chris Lattner 1972c236f3e20a0fb84b5948efa6bb7bb60d759cb32Chris Lattner // Check to see if this type name is already in the dest module... 198567bc2cc1ed4d610daceecbb4ff7f92ebde1b530Reid Spencer Type *Entry = DestST->lookupType(Name); 1994c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner 2004c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner if (ResolveTypes(Entry, RHS, DestST, Name)) { 2014c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner // They look different, save the types 'till later to resolve. 2024c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner DelayedTypesToResolve.push_back(Name); 2034c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner } 2044c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner } 2054c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner 2064c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner // Iteratively resolve types while we can... 2074c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner while (!DelayedTypesToResolve.empty()) { 2084c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner // Loop over all of the types, attempting to resolve them if possible... 2094c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner unsigned OldSize = DelayedTypesToResolve.size(); 2104c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner 211e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner // Try direct resolution by name... 2124c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner for (unsigned i = 0; i != DelayedTypesToResolve.size(); ++i) { 2134c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner const std::string &Name = DelayedTypesToResolve[i]; 214567bc2cc1ed4d610daceecbb4ff7f92ebde1b530Reid Spencer Type *T1 = SrcST->lookupType(Name); 215567bc2cc1ed4d610daceecbb4ff7f92ebde1b530Reid Spencer Type *T2 = DestST->lookupType(Name); 2164c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner if (!ResolveTypes(T2, T1, DestST, Name)) { 2174c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner // We are making progress! 2184c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner DelayedTypesToResolve.erase(DelayedTypesToResolve.begin()+i); 2194c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner --i; 2202f6bb2bce13084dfc4c8acf47f9eae0578267aaaChris Lattner } 2214c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner } 2222f6bb2bce13084dfc4c8acf47f9eae0578267aaaChris Lattner 2234c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner // Did we not eliminate any types? 2244c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner if (DelayedTypesToResolve.size() == OldSize) { 225e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner // Attempt to resolve subelements of types. This allows us to merge these 226e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner // two types: { int* } and { opaque* } 2274c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner for (unsigned i = 0, e = DelayedTypesToResolve.size(); i != e; ++i) { 2284c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner const std::string &Name = DelayedTypesToResolve[i]; 229567bc2cc1ed4d610daceecbb4ff7f92ebde1b530Reid Spencer PATypeHolder T1(SrcST->lookupType(Name)); 230567bc2cc1ed4d610daceecbb4ff7f92ebde1b530Reid Spencer PATypeHolder T2(DestST->lookupType(Name)); 231e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner 232e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner if (!RecursiveResolveTypes(T2, T1, DestST, Name)) { 233e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner // We are making progress! 234e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner DelayedTypesToResolve.erase(DelayedTypesToResolve.begin()+i); 235e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner 236e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner // Go back to the main loop, perhaps we can resolve directly by name 237e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner // now... 238e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner break; 239e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner } 240e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner } 241e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner 242e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner // If we STILL cannot resolve the types, then there is something wrong. 243aeb18ce9c012f8554f48bae9bb32351c6eeaa26cChris Lattner // Report the warning and delete one of the names. 244e76c57ad467ed57f09f2a3ef51628d4b6eb2b304Chris Lattner if (DelayedTypesToResolve.size() == OldSize) { 245aeb18ce9c012f8554f48bae9bb32351c6eeaa26cChris Lattner const std::string &Name = DelayedTypesToResolve.back(); 246aeb18ce9c012f8554f48bae9bb32351c6eeaa26cChris Lattner 247567bc2cc1ed4d610daceecbb4ff7f92ebde1b530Reid Spencer const Type *T1 = SrcST->lookupType(Name); 248567bc2cc1ed4d610daceecbb4ff7f92ebde1b530Reid Spencer const Type *T2 = DestST->lookupType(Name); 249aeb18ce9c012f8554f48bae9bb32351c6eeaa26cChris Lattner std::cerr << "WARNING: Type conflict between types named '" << Name 250adbc0b5287bf36893cdcae2440d48b3cb3489e38Chris Lattner << "'.\n Src='"; 251adbc0b5287bf36893cdcae2440d48b3cb3489e38Chris Lattner WriteTypeSymbolic(std::cerr, T1, Src); 252adbc0b5287bf36893cdcae2440d48b3cb3489e38Chris Lattner std::cerr << "'.\n Dest='"; 253adbc0b5287bf36893cdcae2440d48b3cb3489e38Chris Lattner WriteTypeSymbolic(std::cerr, T2, Dest); 254adbc0b5287bf36893cdcae2440d48b3cb3489e38Chris Lattner std::cerr << "'\n"; 255aeb18ce9c012f8554f48bae9bb32351c6eeaa26cChris Lattner 256aeb18ce9c012f8554f48bae9bb32351c6eeaa26cChris Lattner // Remove the symbol name from the destination. 257aeb18ce9c012f8554f48bae9bb32351c6eeaa26cChris Lattner DelayedTypesToResolve.pop_back(); 2584c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner } 2592c236f3e20a0fb84b5948efa6bb7bb60d759cb32Chris Lattner } 2602c236f3e20a0fb84b5948efa6bb7bb60d759cb32Chris Lattner } 2614c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner 2624c00e53b81de81ecf4ba0c4e287ea230c79e82aeChris Lattner 2632c236f3e20a0fb84b5948efa6bb7bb60d759cb32Chris Lattner return false; 2642c236f3e20a0fb84b5948efa6bb7bb60d759cb32Chris Lattner} 2652c236f3e20a0fb84b5948efa6bb7bb60d759cb32Chris Lattner 2665c2d335d86579941b71816196a95a64b277e8963Chris Lattnerstatic void PrintMap(const std::map<const Value*, Value*> &M) { 2675c2d335d86579941b71816196a95a64b277e8963Chris Lattner for (std::map<const Value*, Value*>::const_iterator I = M.begin(), E =M.end(); 2682d3e8bba628843bf2dffa21f69d9b45098d3bfc4Chris Lattner I != E; ++I) { 2695c2d335d86579941b71816196a95a64b277e8963Chris Lattner std::cerr << " Fr: " << (void*)I->first << " "; 27087182ae6baf28ca6da6ee4bc00cf1857f293acfeChris Lattner I->first->dump(); 2715c2d335d86579941b71816196a95a64b277e8963Chris Lattner std::cerr << " To: " << (void*)I->second << " "; 27287182ae6baf28ca6da6ee4bc00cf1857f293acfeChris Lattner I->second->dump(); 2735c2d335d86579941b71816196a95a64b277e8963Chris Lattner std::cerr << "\n"; 2742d3e8bba628843bf2dffa21f69d9b45098d3bfc4Chris Lattner } 2752d3e8bba628843bf2dffa21f69d9b45098d3bfc4Chris Lattner} 2762d3e8bba628843bf2dffa21f69d9b45098d3bfc4Chris Lattner 2772d3e8bba628843bf2dffa21f69d9b45098d3bfc4Chris Lattner 2785c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner// RemapOperand - Use LocalMap and GlobalMap to convert references from one 2795c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner// module to another. This is somewhat sophisticated in that it can 2805c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner// automatically handle constant references correctly as well... 2815c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner// 2825c2d335d86579941b71816196a95a64b277e8963Chris Lattnerstatic Value *RemapOperand(const Value *In, 2835c2d335d86579941b71816196a95a64b277e8963Chris Lattner std::map<const Value*, Value*> &LocalMap, 2845c2d335d86579941b71816196a95a64b277e8963Chris Lattner std::map<const Value*, Value*> *GlobalMap) { 2855c2d335d86579941b71816196a95a64b277e8963Chris Lattner std::map<const Value*,Value*>::const_iterator I = LocalMap.find(In); 2865c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner if (I != LocalMap.end()) return I->second; 2875c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner 2885c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner if (GlobalMap) { 2895c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner I = GlobalMap->find(In); 2905c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner if (I != GlobalMap->end()) return I->second; 2915c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner } 2925c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner 2938d2de8a82cce67513debee7a3fa5aca0189b4105Chris Lattner // Check to see if it's a constant that we are interesting in transforming... 29418961504fc2b299578dba817900a0696cf3ccc4dChris Lattner if (const Constant *CPV = dyn_cast<Constant>(In)) { 295de512b5b2edebe9c9021a92c7c7a9ae9fbc380d6Chris Lattner if ((!isa<DerivedType>(CPV->getType()) && !isa<ConstantExpr>(CPV)) || 296de512b5b2edebe9c9021a92c7c7a9ae9fbc380d6Chris Lattner isa<ConstantAggregateZero>(CPV)) 29718961504fc2b299578dba817900a0696cf3ccc4dChris Lattner return const_cast<Constant*>(CPV); // Simple constants stay identical... 2988d2de8a82cce67513debee7a3fa5aca0189b4105Chris Lattner 299e9bb2df410f7a22decad9a883f7139d5857c1520Chris Lattner Constant *Result = 0; 3008d2de8a82cce67513debee7a3fa5aca0189b4105Chris Lattner 30118961504fc2b299578dba817900a0696cf3ccc4dChris Lattner if (const ConstantArray *CPA = dyn_cast<ConstantArray>(CPV)) { 302cc7ba49d85b66955516ff0d9574a70e1637dea36Alkis Evlogimenos std::vector<Constant*> Operands(CPA->getNumOperands()); 303cc7ba49d85b66955516ff0d9574a70e1637dea36Alkis Evlogimenos for (unsigned i = 0, e = CPA->getNumOperands(); i != e; ++i) 304cc7ba49d85b66955516ff0d9574a70e1637dea36Alkis Evlogimenos Operands[i] = 305cc7ba49d85b66955516ff0d9574a70e1637dea36Alkis Evlogimenos cast<Constant>(RemapOperand(CPA->getOperand(i), LocalMap, GlobalMap)); 306e9bb2df410f7a22decad9a883f7139d5857c1520Chris Lattner Result = ConstantArray::get(cast<ArrayType>(CPA->getType()), Operands); 30718961504fc2b299578dba817900a0696cf3ccc4dChris Lattner } else if (const ConstantStruct *CPS = dyn_cast<ConstantStruct>(CPV)) { 308cc7ba49d85b66955516ff0d9574a70e1637dea36Alkis Evlogimenos std::vector<Constant*> Operands(CPS->getNumOperands()); 309cc7ba49d85b66955516ff0d9574a70e1637dea36Alkis Evlogimenos for (unsigned i = 0, e = CPS->getNumOperands(); i != e; ++i) 310cc7ba49d85b66955516ff0d9574a70e1637dea36Alkis Evlogimenos Operands[i] = 311cc7ba49d85b66955516ff0d9574a70e1637dea36Alkis Evlogimenos cast<Constant>(RemapOperand(CPS->getOperand(i), LocalMap, GlobalMap)); 312e9bb2df410f7a22decad9a883f7139d5857c1520Chris Lattner Result = ConstantStruct::get(cast<StructType>(CPS->getType()), Operands); 313e9bb2df410f7a22decad9a883f7139d5857c1520Chris Lattner } else if (isa<ConstantPointerNull>(CPV)) { 31418961504fc2b299578dba817900a0696cf3ccc4dChris Lattner Result = const_cast<Constant*>(CPV); 31500dc4796132933e76fe2b834ca087e42621c175aReid Spencer } else if (isa<GlobalValue>(CPV)) { 31600dc4796132933e76fe2b834ca087e42621c175aReid Spencer Result = cast<Constant>(RemapOperand(CPV, LocalMap, GlobalMap)); 3176cdf1971bdf88ddd9a7d46b5f5f975497d68c38eChris Lattner } else if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CPV)) { 318b319faff77a5bb12e753c45662f6c532b77f0b91Chris Lattner if (CE->getOpcode() == Instruction::GetElementPtr) { 319b319faff77a5bb12e753c45662f6c532b77f0b91Chris Lattner Value *Ptr = RemapOperand(CE->getOperand(0), LocalMap, GlobalMap); 320b319faff77a5bb12e753c45662f6c532b77f0b91Chris Lattner std::vector<Constant*> Indices; 321b319faff77a5bb12e753c45662f6c532b77f0b91Chris Lattner Indices.reserve(CE->getNumOperands()-1); 322b319faff77a5bb12e753c45662f6c532b77f0b91Chris Lattner for (unsigned i = 1, e = CE->getNumOperands(); i != e; ++i) 323b319faff77a5bb12e753c45662f6c532b77f0b91Chris Lattner Indices.push_back(cast<Constant>(RemapOperand(CE->getOperand(i), 324b319faff77a5bb12e753c45662f6c532b77f0b91Chris Lattner LocalMap, GlobalMap))); 325b319faff77a5bb12e753c45662f6c532b77f0b91Chris Lattner 326b319faff77a5bb12e753c45662f6c532b77f0b91Chris Lattner Result = ConstantExpr::getGetElementPtr(cast<Constant>(Ptr), Indices); 327b319faff77a5bb12e753c45662f6c532b77f0b91Chris Lattner } else if (CE->getNumOperands() == 1) { 328ad333484ea5ae976b83e35ccd3f6cfa6e71290e2Chris Lattner // Cast instruction 329ad333484ea5ae976b83e35ccd3f6cfa6e71290e2Chris Lattner assert(CE->getOpcode() == Instruction::Cast); 3306cdf1971bdf88ddd9a7d46b5f5f975497d68c38eChris Lattner Value *V = RemapOperand(CE->getOperand(0), LocalMap, GlobalMap); 331ad333484ea5ae976b83e35ccd3f6cfa6e71290e2Chris Lattner Result = ConstantExpr::getCast(cast<Constant>(V), CE->getType()); 3321438102576b94d6dac9bb18e8df291c4d632572dChris Lattner } else if (CE->getNumOperands() == 3) { 3331438102576b94d6dac9bb18e8df291c4d632572dChris Lattner // Select instruction 3341438102576b94d6dac9bb18e8df291c4d632572dChris Lattner assert(CE->getOpcode() == Instruction::Select); 3351438102576b94d6dac9bb18e8df291c4d632572dChris Lattner Value *V1 = RemapOperand(CE->getOperand(0), LocalMap, GlobalMap); 3361438102576b94d6dac9bb18e8df291c4d632572dChris Lattner Value *V2 = RemapOperand(CE->getOperand(1), LocalMap, GlobalMap); 3371438102576b94d6dac9bb18e8df291c4d632572dChris Lattner Value *V3 = RemapOperand(CE->getOperand(2), LocalMap, GlobalMap); 3381438102576b94d6dac9bb18e8df291c4d632572dChris Lattner Result = ConstantExpr::getSelect(cast<Constant>(V1), cast<Constant>(V2), 3391438102576b94d6dac9bb18e8df291c4d632572dChris Lattner cast<Constant>(V3)); 3406cdf1971bdf88ddd9a7d46b5f5f975497d68c38eChris Lattner } else if (CE->getNumOperands() == 2) { 3416cdf1971bdf88ddd9a7d46b5f5f975497d68c38eChris Lattner // Binary operator... 3426cdf1971bdf88ddd9a7d46b5f5f975497d68c38eChris Lattner Value *V1 = RemapOperand(CE->getOperand(0), LocalMap, GlobalMap); 3436cdf1971bdf88ddd9a7d46b5f5f975497d68c38eChris Lattner Value *V2 = RemapOperand(CE->getOperand(1), LocalMap, GlobalMap); 3446cdf1971bdf88ddd9a7d46b5f5f975497d68c38eChris Lattner 3456cdf1971bdf88ddd9a7d46b5f5f975497d68c38eChris Lattner Result = ConstantExpr::get(CE->getOpcode(), cast<Constant>(V1), 346d981f8af79be9ea647d593531091740a3a27a85fChris Lattner cast<Constant>(V2)); 3476cdf1971bdf88ddd9a7d46b5f5f975497d68c38eChris Lattner } else { 348b319faff77a5bb12e753c45662f6c532b77f0b91Chris Lattner assert(0 && "Unknown constant expr type!"); 3496cdf1971bdf88ddd9a7d46b5f5f975497d68c38eChris Lattner } 3506cdf1971bdf88ddd9a7d46b5f5f975497d68c38eChris Lattner 3518d2de8a82cce67513debee7a3fa5aca0189b4105Chris Lattner } else { 3528d2de8a82cce67513debee7a3fa5aca0189b4105Chris Lattner assert(0 && "Unknown type of derived type constant value!"); 3538d2de8a82cce67513debee7a3fa5aca0189b4105Chris Lattner } 3548d2de8a82cce67513debee7a3fa5aca0189b4105Chris Lattner 3558d2de8a82cce67513debee7a3fa5aca0189b4105Chris Lattner // Cache the mapping in our local map structure... 356d149c053cdbb406b7b5dff24127b4c509420893eChris Lattner if (GlobalMap) 357d149c053cdbb406b7b5dff24127b4c509420893eChris Lattner GlobalMap->insert(std::make_pair(In, Result)); 358d149c053cdbb406b7b5dff24127b4c509420893eChris Lattner else 359d149c053cdbb406b7b5dff24127b4c509420893eChris Lattner LocalMap.insert(std::make_pair(In, Result)); 3608d2de8a82cce67513debee7a3fa5aca0189b4105Chris Lattner return Result; 3618d2de8a82cce67513debee7a3fa5aca0189b4105Chris Lattner } 3622d3e8bba628843bf2dffa21f69d9b45098d3bfc4Chris Lattner 3635c2d335d86579941b71816196a95a64b277e8963Chris Lattner std::cerr << "XXX LocalMap: \n"; 3642d3e8bba628843bf2dffa21f69d9b45098d3bfc4Chris Lattner PrintMap(LocalMap); 3652d3e8bba628843bf2dffa21f69d9b45098d3bfc4Chris Lattner 3662d3e8bba628843bf2dffa21f69d9b45098d3bfc4Chris Lattner if (GlobalMap) { 3675c2d335d86579941b71816196a95a64b277e8963Chris Lattner std::cerr << "XXX GlobalMap: \n"; 3682d3e8bba628843bf2dffa21f69d9b45098d3bfc4Chris Lattner PrintMap(*GlobalMap); 3692d3e8bba628843bf2dffa21f69d9b45098d3bfc4Chris Lattner } 3702d3e8bba628843bf2dffa21f69d9b45098d3bfc4Chris Lattner 3715c2d335d86579941b71816196a95a64b277e8963Chris Lattner std::cerr << "Couldn't remap value: " << (void*)In << " " << *In << "\n"; 3728d2de8a82cce67513debee7a3fa5aca0189b4105Chris Lattner assert(0 && "Couldn't remap value!"); 3738d2de8a82cce67513debee7a3fa5aca0189b4105Chris Lattner return 0; 3745c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner} 3755c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner 376c003628a612d3687fb77088a5894314210a65385Chris Lattner/// ForceRenaming - The LLVM SymbolTable class autorenames globals that conflict 377c003628a612d3687fb77088a5894314210a65385Chris Lattner/// in the symbol table. This is good for all clients except for us. Go 378c003628a612d3687fb77088a5894314210a65385Chris Lattner/// through the trouble to force this back. 379c003628a612d3687fb77088a5894314210a65385Chris Lattnerstatic void ForceRenaming(GlobalValue *GV, const std::string &Name) { 380c003628a612d3687fb77088a5894314210a65385Chris Lattner assert(GV->getName() != Name && "Can't force rename to self"); 381c003628a612d3687fb77088a5894314210a65385Chris Lattner SymbolTable &ST = GV->getParent()->getSymbolTable(); 382c003628a612d3687fb77088a5894314210a65385Chris Lattner 383c003628a612d3687fb77088a5894314210a65385Chris Lattner // If there is a conflict, rename the conflict. 384c003628a612d3687fb77088a5894314210a65385Chris Lattner Value *ConflictVal = ST.lookup(GV->getType(), Name); 385c003628a612d3687fb77088a5894314210a65385Chris Lattner assert(ConflictVal&&"Why do we have to force rename if there is no conflic?"); 386c003628a612d3687fb77088a5894314210a65385Chris Lattner GlobalValue *ConflictGV = cast<GlobalValue>(ConflictVal); 387c003628a612d3687fb77088a5894314210a65385Chris Lattner assert(ConflictGV->hasInternalLinkage() && 388c003628a612d3687fb77088a5894314210a65385Chris Lattner "Not conflicting with a static global, should link instead!"); 389c003628a612d3687fb77088a5894314210a65385Chris Lattner 390c003628a612d3687fb77088a5894314210a65385Chris Lattner ConflictGV->setName(""); // Eliminate the conflict 391c003628a612d3687fb77088a5894314210a65385Chris Lattner GV->setName(Name); // Force the name back 392c003628a612d3687fb77088a5894314210a65385Chris Lattner ConflictGV->setName(Name); // This will cause ConflictGV to get renamed 3937b0c84dcf59b6ac3a27843fd8162ab36928fba35Chris Lattner assert(GV->getName() == Name && ConflictGV->getName() != Name && 394c003628a612d3687fb77088a5894314210a65385Chris Lattner "ForceRenaming didn't work"); 395c003628a612d3687fb77088a5894314210a65385Chris Lattner} 396c003628a612d3687fb77088a5894314210a65385Chris Lattner 3975c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner 3985c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner// LinkGlobals - Loop through the global variables in the src module and merge 3998166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner// them into the dest module. 4005c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner// 4015c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattnerstatic bool LinkGlobals(Module *Dest, const Module *Src, 4025c2d335d86579941b71816196a95a64b277e8963Chris Lattner std::map<const Value*, Value*> &ValueMap, 4038166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner std::multimap<std::string, GlobalVariable *> &AppendingVars, 4045a837defff581accc09048bea1cd839009e374a7Chris Lattner std::map<std::string, GlobalValue*> &GlobalsByName, 4055c2d335d86579941b71816196a95a64b277e8963Chris Lattner std::string *Err) { 4065c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner // We will need a module level symbol table if the src module has a module 4075c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner // level symbol table... 408b91b657e026e86082b665cc875c2881ed075b68dChris Lattner SymbolTable *ST = (SymbolTable*)&Dest->getSymbolTable(); 4095c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner 4105c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner // Loop over all of the globals in the src module, mapping them over as we go 4115c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner // 4125c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner for (Module::const_giterator I = Src->gbegin(), E = Src->gend(); I != E; ++I){ 41318961504fc2b299578dba817900a0696cf3ccc4dChris Lattner const GlobalVariable *SGV = I; 4144ad02e726d9b634372b037d4b352d8b63bb9e849Chris Lattner GlobalVariable *DGV = 0; 4155a837defff581accc09048bea1cd839009e374a7Chris Lattner // Check to see if may have to link the global. 416aad2deb17c3e624cae4ebc1ed51fc5264fa1c0b8Chris Lattner if (SGV->hasName() && !SGV->hasInternalLinkage()) 417aad2deb17c3e624cae4ebc1ed51fc5264fa1c0b8Chris Lattner if (!(DGV = Dest->getGlobalVariable(SGV->getName(), 418aad2deb17c3e624cae4ebc1ed51fc5264fa1c0b8Chris Lattner SGV->getType()->getElementType()))) { 419aad2deb17c3e624cae4ebc1ed51fc5264fa1c0b8Chris Lattner std::map<std::string, GlobalValue*>::iterator EGV = 420aad2deb17c3e624cae4ebc1ed51fc5264fa1c0b8Chris Lattner GlobalsByName.find(SGV->getName()); 421aad2deb17c3e624cae4ebc1ed51fc5264fa1c0b8Chris Lattner if (EGV != GlobalsByName.end()) 422aad2deb17c3e624cae4ebc1ed51fc5264fa1c0b8Chris Lattner DGV = dyn_cast<GlobalVariable>(EGV->second); 423aad2deb17c3e624cae4ebc1ed51fc5264fa1c0b8Chris Lattner if (DGV && RecursiveResolveTypes(SGV->getType(), DGV->getType(), ST, "")) 424aad2deb17c3e624cae4ebc1ed51fc5264fa1c0b8Chris Lattner DGV = 0; // FIXME: gross. 425aad2deb17c3e624cae4ebc1ed51fc5264fa1c0b8Chris Lattner } 4265c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner 4274ad02e726d9b634372b037d4b352d8b63bb9e849Chris Lattner assert(SGV->hasInitializer() || SGV->hasExternalLinkage() && 4284ad02e726d9b634372b037d4b352d8b63bb9e849Chris Lattner "Global must either be external or have an initializer!"); 4295c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner 4300fec08eb58dd9fffeb72c584aa61a59d71111c8dChris Lattner bool SGExtern = SGV->isExternal(); 4310fec08eb58dd9fffeb72c584aa61a59d71111c8dChris Lattner bool DGExtern = DGV ? DGV->isExternal() : false; 4320fec08eb58dd9fffeb72c584aa61a59d71111c8dChris Lattner 4334ad02e726d9b634372b037d4b352d8b63bb9e849Chris Lattner if (!DGV || DGV->hasInternalLinkage() || SGV->hasInternalLinkage()) { 4345c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner // No linking to be performed, simply create an identical version of the 4358d2de8a82cce67513debee7a3fa5aca0189b4105Chris Lattner // symbol over in the dest module... the initializer will be filled in 4368d2de8a82cce67513debee7a3fa5aca0189b4105Chris Lattner // later by LinkGlobalInits... 4378d2de8a82cce67513debee7a3fa5aca0189b4105Chris Lattner // 4382719bac90525985f4ebb97324b4c087d47b54384Chris Lattner GlobalVariable *NewDGV = 4392719bac90525985f4ebb97324b4c087d47b54384Chris Lattner new GlobalVariable(SGV->getType()->getElementType(), 4402719bac90525985f4ebb97324b4c087d47b54384Chris Lattner SGV->isConstant(), SGV->getLinkage(), /*init*/0, 4412719bac90525985f4ebb97324b4c087d47b54384Chris Lattner SGV->getName(), Dest); 4422719bac90525985f4ebb97324b4c087d47b54384Chris Lattner 4432719bac90525985f4ebb97324b4c087d47b54384Chris Lattner // If the LLVM runtime renamed the global, but it is an externally visible 4442719bac90525985f4ebb97324b4c087d47b54384Chris Lattner // symbol, DGV must be an existing global with internal linkage. Rename 4452719bac90525985f4ebb97324b4c087d47b54384Chris Lattner // it. 446c003628a612d3687fb77088a5894314210a65385Chris Lattner if (NewDGV->getName() != SGV->getName() && !NewDGV->hasInternalLinkage()) 447c003628a612d3687fb77088a5894314210a65385Chris Lattner ForceRenaming(NewDGV, SGV->getName()); 4485c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner 4495c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner // Make sure to remember this mapping... 4502719bac90525985f4ebb97324b4c087d47b54384Chris Lattner ValueMap.insert(std::make_pair(SGV, NewDGV)); 4518166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner if (SGV->hasAppendingLinkage()) 4528166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner // Keep track that this is an appending variable... 4538166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner AppendingVars.insert(std::make_pair(SGV->getName(), NewDGV)); 4548166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner 455c2b97d43a074445c6856d69538a95de09450c26eChris Lattner } else if (SGV->isExternal()) { 456c2b97d43a074445c6856d69538a95de09450c26eChris Lattner // If SGV is external or if both SGV & DGV are external.. Just link the 457c2b97d43a074445c6856d69538a95de09450c26eChris Lattner // external globals, we aren't adding anything. 458c2b97d43a074445c6856d69538a95de09450c26eChris Lattner ValueMap.insert(std::make_pair(SGV, DGV)); 459c2b97d43a074445c6856d69538a95de09450c26eChris Lattner 460c2b97d43a074445c6856d69538a95de09450c26eChris Lattner } else if (DGV->isExternal()) { // If DGV is external but SGV is not... 461c2b97d43a074445c6856d69538a95de09450c26eChris Lattner ValueMap.insert(std::make_pair(SGV, DGV)); 462c2b97d43a074445c6856d69538a95de09450c26eChris Lattner DGV->setLinkage(SGV->getLinkage()); // Inherit linkage! 46335956558e26e655aaa2e8ad6ee405365271869a4Chris Lattner } else if (SGV->hasWeakLinkage() || SGV->hasLinkOnceLinkage()) { 46472ac148d4964fbff950fe11a0eeeda73973b849bChris Lattner // At this point we know that DGV has LinkOnce, Appending, Weak, or 46572ac148d4964fbff950fe11a0eeeda73973b849bChris Lattner // External linkage. If DGV is Appending, this is an error. 46672ac148d4964fbff950fe11a0eeeda73973b849bChris Lattner if (DGV->hasAppendingLinkage()) 46772ac148d4964fbff950fe11a0eeeda73973b849bChris Lattner return Error(Err, "Linking globals named '" + SGV->getName() + 46872ac148d4964fbff950fe11a0eeeda73973b849bChris Lattner " ' with 'weak' and 'appending' linkage is not allowed!"); 46935956558e26e655aaa2e8ad6ee405365271869a4Chris Lattner 47035956558e26e655aaa2e8ad6ee405365271869a4Chris Lattner if (SGV->isConstant() != DGV->isConstant()) 47135956558e26e655aaa2e8ad6ee405365271869a4Chris Lattner return Error(Err, "Global Variable Collision on '" + 47272cf7df6a364c213a94d01e1f0f8d918940c8416Chris Lattner ToStr(SGV->getType(), Src) + " %" + SGV->getName() + 47335956558e26e655aaa2e8ad6ee405365271869a4Chris Lattner "' - Global variables differ in const'ness"); 47435956558e26e655aaa2e8ad6ee405365271869a4Chris Lattner 47572ac148d4964fbff950fe11a0eeeda73973b849bChris Lattner // Otherwise, just perform the link. 47672ac148d4964fbff950fe11a0eeeda73973b849bChris Lattner ValueMap.insert(std::make_pair(SGV, DGV)); 47735956558e26e655aaa2e8ad6ee405365271869a4Chris Lattner 47835956558e26e655aaa2e8ad6ee405365271869a4Chris Lattner // Linkonce+Weak = Weak 47935956558e26e655aaa2e8ad6ee405365271869a4Chris Lattner if (DGV->hasLinkOnceLinkage() && SGV->hasWeakLinkage()) 48035956558e26e655aaa2e8ad6ee405365271869a4Chris Lattner DGV->setLinkage(SGV->getLinkage()); 48135956558e26e655aaa2e8ad6ee405365271869a4Chris Lattner 48235956558e26e655aaa2e8ad6ee405365271869a4Chris Lattner } else if (DGV->hasWeakLinkage() || DGV->hasLinkOnceLinkage()) { 48372ac148d4964fbff950fe11a0eeeda73973b849bChris Lattner // At this point we know that SGV has LinkOnce, Appending, or External 48472ac148d4964fbff950fe11a0eeeda73973b849bChris Lattner // linkage. If SGV is Appending, this is an error. 48572ac148d4964fbff950fe11a0eeeda73973b849bChris Lattner if (SGV->hasAppendingLinkage()) 48672ac148d4964fbff950fe11a0eeeda73973b849bChris Lattner return Error(Err, "Linking globals named '" + SGV->getName() + 48772ac148d4964fbff950fe11a0eeeda73973b849bChris Lattner " ' with 'weak' and 'appending' linkage is not allowed!"); 48835956558e26e655aaa2e8ad6ee405365271869a4Chris Lattner 48935956558e26e655aaa2e8ad6ee405365271869a4Chris Lattner if (SGV->isConstant() != DGV->isConstant()) 49035956558e26e655aaa2e8ad6ee405365271869a4Chris Lattner return Error(Err, "Global Variable Collision on '" + 49172cf7df6a364c213a94d01e1f0f8d918940c8416Chris Lattner ToStr(SGV->getType(), Src) + " %" + SGV->getName() + 49235956558e26e655aaa2e8ad6ee405365271869a4Chris Lattner "' - Global variables differ in const'ness"); 49335956558e26e655aaa2e8ad6ee405365271869a4Chris Lattner 49472ac148d4964fbff950fe11a0eeeda73973b849bChris Lattner if (!SGV->hasLinkOnceLinkage()) 49572ac148d4964fbff950fe11a0eeeda73973b849bChris Lattner DGV->setLinkage(SGV->getLinkage()); // Inherit linkage! 49672ac148d4964fbff950fe11a0eeeda73973b849bChris Lattner ValueMap.insert(std::make_pair(SGV, DGV)); 49772ac148d4964fbff950fe11a0eeeda73973b849bChris Lattner 498c2b97d43a074445c6856d69538a95de09450c26eChris Lattner } else if (SGV->getLinkage() != DGV->getLinkage()) { 4994ad02e726d9b634372b037d4b352d8b63bb9e849Chris Lattner return Error(Err, "Global variables named '" + SGV->getName() + 5004ad02e726d9b634372b037d4b352d8b63bb9e849Chris Lattner "' have different linkage specifiers!"); 501c2b97d43a074445c6856d69538a95de09450c26eChris Lattner } else if (SGV->hasExternalLinkage()) { 502c2b97d43a074445c6856d69538a95de09450c26eChris Lattner // Allow linking two exactly identical external global variables... 503f85770c9a670dc5c360015125389c389ae9592c7Chris Lattner if (SGV->isConstant() != DGV->isConstant()) 504c2b97d43a074445c6856d69538a95de09450c26eChris Lattner return Error(Err, "Global Variable Collision on '" + 50572cf7df6a364c213a94d01e1f0f8d918940c8416Chris Lattner ToStr(SGV->getType(), Src) + " %" + SGV->getName() + 506c2b97d43a074445c6856d69538a95de09450c26eChris Lattner "' - Global variables differ in const'ness"); 507f85770c9a670dc5c360015125389c389ae9592c7Chris Lattner 508f85770c9a670dc5c360015125389c389ae9592c7Chris Lattner if (SGV->getInitializer() != DGV->getInitializer()) 509f85770c9a670dc5c360015125389c389ae9592c7Chris Lattner return Error(Err, "Global Variable Collision on '" + 51072cf7df6a364c213a94d01e1f0f8d918940c8416Chris Lattner ToStr(SGV->getType(), Src) + " %" + SGV->getName() + 511f85770c9a670dc5c360015125389c389ae9592c7Chris Lattner "' - External linkage globals have different initializers"); 512f85770c9a670dc5c360015125389c389ae9592c7Chris Lattner 513c2b97d43a074445c6856d69538a95de09450c26eChris Lattner ValueMap.insert(std::make_pair(SGV, DGV)); 514c2b97d43a074445c6856d69538a95de09450c26eChris Lattner } else if (SGV->hasAppendingLinkage()) { 5158166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner // No linking is performed yet. Just insert a new copy of the global, and 5168166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner // keep track of the fact that it is an appending variable in the 5178166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner // AppendingVars map. The name is cleared out so that no linkage is 5188166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner // performed. 5198166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner GlobalVariable *NewDGV = 5208166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner new GlobalVariable(SGV->getType()->getElementType(), 5218166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner SGV->isConstant(), SGV->getLinkage(), /*init*/0, 5228166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner "", Dest); 5238166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner 5248166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner // Make sure to remember this mapping... 5258166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner ValueMap.insert(std::make_pair(SGV, NewDGV)); 5268166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner 5278166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner // Keep track that this is an appending variable... 5288166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner AppendingVars.insert(std::make_pair(SGV->getName(), NewDGV)); 5294ad02e726d9b634372b037d4b352d8b63bb9e849Chris Lattner } else { 5304ad02e726d9b634372b037d4b352d8b63bb9e849Chris Lattner assert(0 && "Unknown linkage!"); 5315c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner } 5325c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner } 5335c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner return false; 5345c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner} 5355c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner 5365c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner 5378d2de8a82cce67513debee7a3fa5aca0189b4105Chris Lattner// LinkGlobalInits - Update the initializers in the Dest module now that all 5388d2de8a82cce67513debee7a3fa5aca0189b4105Chris Lattner// globals that may be referenced are in Dest. 5398d2de8a82cce67513debee7a3fa5aca0189b4105Chris Lattner// 5408d2de8a82cce67513debee7a3fa5aca0189b4105Chris Lattnerstatic bool LinkGlobalInits(Module *Dest, const Module *Src, 5415c2d335d86579941b71816196a95a64b277e8963Chris Lattner std::map<const Value*, Value*> &ValueMap, 5425c2d335d86579941b71816196a95a64b277e8963Chris Lattner std::string *Err) { 5438d2de8a82cce67513debee7a3fa5aca0189b4105Chris Lattner 5448d2de8a82cce67513debee7a3fa5aca0189b4105Chris Lattner // Loop over all of the globals in the src module, mapping them over as we go 5458d2de8a82cce67513debee7a3fa5aca0189b4105Chris Lattner // 5468d2de8a82cce67513debee7a3fa5aca0189b4105Chris Lattner for (Module::const_giterator I = Src->gbegin(), E = Src->gend(); I != E; ++I){ 54718961504fc2b299578dba817900a0696cf3ccc4dChris Lattner const GlobalVariable *SGV = I; 5488d2de8a82cce67513debee7a3fa5aca0189b4105Chris Lattner 5498d2de8a82cce67513debee7a3fa5aca0189b4105Chris Lattner if (SGV->hasInitializer()) { // Only process initialized GV's 5508d2de8a82cce67513debee7a3fa5aca0189b4105Chris Lattner // Figure out what the initializer looks like in the dest module... 5514ad02e726d9b634372b037d4b352d8b63bb9e849Chris Lattner Constant *SInit = 5522f6bb2bce13084dfc4c8acf47f9eae0578267aaaChris Lattner cast<Constant>(RemapOperand(SGV->getInitializer(), ValueMap, 0)); 5538d2de8a82cce67513debee7a3fa5aca0189b4105Chris Lattner 5548d2de8a82cce67513debee7a3fa5aca0189b4105Chris Lattner GlobalVariable *DGV = cast<GlobalVariable>(ValueMap[SGV]); 5554ad02e726d9b634372b037d4b352d8b63bb9e849Chris Lattner if (DGV->hasInitializer()) { 5564ad02e726d9b634372b037d4b352d8b63bb9e849Chris Lattner if (SGV->hasExternalLinkage()) { 5574ad02e726d9b634372b037d4b352d8b63bb9e849Chris Lattner if (DGV->getInitializer() != SInit) 5584ad02e726d9b634372b037d4b352d8b63bb9e849Chris Lattner return Error(Err, "Global Variable Collision on '" + 55972cf7df6a364c213a94d01e1f0f8d918940c8416Chris Lattner ToStr(SGV->getType(), Src) +"':%"+SGV->getName()+ 5604ad02e726d9b634372b037d4b352d8b63bb9e849Chris Lattner " - Global variables have different initializers"); 56172ac148d4964fbff950fe11a0eeeda73973b849bChris Lattner } else if (DGV->hasLinkOnceLinkage() || DGV->hasWeakLinkage()) { 5624ad02e726d9b634372b037d4b352d8b63bb9e849Chris Lattner // Nothing is required, mapped values will take the new global 5634ad02e726d9b634372b037d4b352d8b63bb9e849Chris Lattner // automatically. 56457cb9883aa4c82357594d4186858f175135be3b1Chris Lattner } else if (SGV->hasLinkOnceLinkage() || SGV->hasWeakLinkage()) { 56557cb9883aa4c82357594d4186858f175135be3b1Chris Lattner // Nothing is required, mapped values will take the new global 56657cb9883aa4c82357594d4186858f175135be3b1Chris Lattner // automatically. 5674ad02e726d9b634372b037d4b352d8b63bb9e849Chris Lattner } else if (DGV->hasAppendingLinkage()) { 5684ad02e726d9b634372b037d4b352d8b63bb9e849Chris Lattner assert(0 && "Appending linkage unimplemented!"); 5694ad02e726d9b634372b037d4b352d8b63bb9e849Chris Lattner } else { 5704ad02e726d9b634372b037d4b352d8b63bb9e849Chris Lattner assert(0 && "Unknown linkage!"); 5714ad02e726d9b634372b037d4b352d8b63bb9e849Chris Lattner } 5728d2de8a82cce67513debee7a3fa5aca0189b4105Chris Lattner } else { 5738d2de8a82cce67513debee7a3fa5aca0189b4105Chris Lattner // Copy the initializer over now... 5744ad02e726d9b634372b037d4b352d8b63bb9e849Chris Lattner DGV->setInitializer(SInit); 5758d2de8a82cce67513debee7a3fa5aca0189b4105Chris Lattner } 5768d2de8a82cce67513debee7a3fa5aca0189b4105Chris Lattner } 5778d2de8a82cce67513debee7a3fa5aca0189b4105Chris Lattner } 5788d2de8a82cce67513debee7a3fa5aca0189b4105Chris Lattner return false; 5798d2de8a82cce67513debee7a3fa5aca0189b4105Chris Lattner} 5805c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner 58179df7c0aaa18129e55968c8783ef8346807bd4afChris Lattner// LinkFunctionProtos - Link the functions together between the two modules, 582c8cc4cb03bd90f89be7fe1649542a2d5ae689632Chris Lattner// without doing function bodies... this just adds external function prototypes 583c8cc4cb03bd90f89be7fe1649542a2d5ae689632Chris Lattner// to the Dest function... 5845c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner// 58579df7c0aaa18129e55968c8783ef8346807bd4afChris Lattnerstatic bool LinkFunctionProtos(Module *Dest, const Module *Src, 5865c2d335d86579941b71816196a95a64b277e8963Chris Lattner std::map<const Value*, Value*> &ValueMap, 5875a837defff581accc09048bea1cd839009e374a7Chris Lattner std::map<std::string, GlobalValue*> &GlobalsByName, 5885c2d335d86579941b71816196a95a64b277e8963Chris Lattner std::string *Err) { 589b91b657e026e86082b665cc875c2881ed075b68dChris Lattner SymbolTable *ST = (SymbolTable*)&Dest->getSymbolTable(); 5905c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner 591c8cc4cb03bd90f89be7fe1649542a2d5ae689632Chris Lattner // Loop over all of the functions in the src module, mapping them over as we 592c8cc4cb03bd90f89be7fe1649542a2d5ae689632Chris Lattner // go 5935c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner // 5945c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner for (Module::const_iterator I = Src->begin(), E = Src->end(); I != E; ++I) { 59518961504fc2b299578dba817900a0696cf3ccc4dChris Lattner const Function *SF = I; // SrcFunction 5964ad02e726d9b634372b037d4b352d8b63bb9e849Chris Lattner Function *DF = 0; 5975a837defff581accc09048bea1cd839009e374a7Chris Lattner if (SF->hasName() && !SF->hasInternalLinkage()) { 5985a837defff581accc09048bea1cd839009e374a7Chris Lattner // Check to see if may have to link the function. 599aad2deb17c3e624cae4ebc1ed51fc5264fa1c0b8Chris Lattner if (!(DF = Dest->getFunction(SF->getName(), SF->getFunctionType()))) { 600aad2deb17c3e624cae4ebc1ed51fc5264fa1c0b8Chris Lattner std::map<std::string, GlobalValue*>::iterator EF = 601aad2deb17c3e624cae4ebc1ed51fc5264fa1c0b8Chris Lattner GlobalsByName.find(SF->getName()); 602aad2deb17c3e624cae4ebc1ed51fc5264fa1c0b8Chris Lattner if (EF != GlobalsByName.end()) 603aad2deb17c3e624cae4ebc1ed51fc5264fa1c0b8Chris Lattner DF = dyn_cast<Function>(EF->second); 604aad2deb17c3e624cae4ebc1ed51fc5264fa1c0b8Chris Lattner if (DF && RecursiveResolveTypes(SF->getType(), DF->getType(), ST, "")) 605aad2deb17c3e624cae4ebc1ed51fc5264fa1c0b8Chris Lattner DF = 0; // FIXME: gross. 606aad2deb17c3e624cae4ebc1ed51fc5264fa1c0b8Chris Lattner } 6075a837defff581accc09048bea1cd839009e374a7Chris Lattner } 6085c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner 6094ad02e726d9b634372b037d4b352d8b63bb9e849Chris Lattner if (!DF || SF->hasInternalLinkage() || DF->hasInternalLinkage()) { 6100fec08eb58dd9fffeb72c584aa61a59d71111c8dChris Lattner // Function does not already exist, simply insert an function signature 6110fec08eb58dd9fffeb72c584aa61a59d71111c8dChris Lattner // identical to SF into the dest module... 6122719bac90525985f4ebb97324b4c087d47b54384Chris Lattner Function *NewDF = new Function(SF->getFunctionType(), SF->getLinkage(), 6132719bac90525985f4ebb97324b4c087d47b54384Chris Lattner SF->getName(), Dest); 6142719bac90525985f4ebb97324b4c087d47b54384Chris Lattner 6152719bac90525985f4ebb97324b4c087d47b54384Chris Lattner // If the LLVM runtime renamed the function, but it is an externally 6162719bac90525985f4ebb97324b4c087d47b54384Chris Lattner // visible symbol, DF must be an existing function with internal linkage. 6172719bac90525985f4ebb97324b4c087d47b54384Chris Lattner // Rename it. 618c003628a612d3687fb77088a5894314210a65385Chris Lattner if (NewDF->getName() != SF->getName() && !NewDF->hasInternalLinkage()) 61982b5b219dd3b9035442389ddcd58e6f859aae039Chris Lattner ForceRenaming(NewDF, SF->getName()); 6204ad02e726d9b634372b037d4b352d8b63bb9e849Chris Lattner 6214ad02e726d9b634372b037d4b352d8b63bb9e849Chris Lattner // ... and remember this mapping... 6222719bac90525985f4ebb97324b4c087d47b54384Chris Lattner ValueMap.insert(std::make_pair(SF, NewDF)); 623c2b97d43a074445c6856d69538a95de09450c26eChris Lattner } else if (SF->isExternal()) { 624c2b97d43a074445c6856d69538a95de09450c26eChris Lattner // If SF is external or if both SF & DF are external.. Just link the 625c2b97d43a074445c6856d69538a95de09450c26eChris Lattner // external functions, we aren't adding anything. 626c2b97d43a074445c6856d69538a95de09450c26eChris Lattner ValueMap.insert(std::make_pair(SF, DF)); 627c2b97d43a074445c6856d69538a95de09450c26eChris Lattner } else if (DF->isExternal()) { // If DF is external but SF is not... 628c2b97d43a074445c6856d69538a95de09450c26eChris Lattner // Link the external functions, update linkage qualifiers 629c2b97d43a074445c6856d69538a95de09450c26eChris Lattner ValueMap.insert(std::make_pair(SF, DF)); 630c2b97d43a074445c6856d69538a95de09450c26eChris Lattner DF->setLinkage(SF->getLinkage()); 631c2b97d43a074445c6856d69538a95de09450c26eChris Lattner 63235956558e26e655aaa2e8ad6ee405365271869a4Chris Lattner } else if (SF->hasWeakLinkage() || SF->hasLinkOnceLinkage()) { 63372ac148d4964fbff950fe11a0eeeda73973b849bChris Lattner // At this point we know that DF has LinkOnce, Weak, or External linkage. 63472ac148d4964fbff950fe11a0eeeda73973b849bChris Lattner ValueMap.insert(std::make_pair(SF, DF)); 63572ac148d4964fbff950fe11a0eeeda73973b849bChris Lattner 63635956558e26e655aaa2e8ad6ee405365271869a4Chris Lattner // Linkonce+Weak = Weak 63735956558e26e655aaa2e8ad6ee405365271869a4Chris Lattner if (DF->hasLinkOnceLinkage() && SF->hasWeakLinkage()) 63835956558e26e655aaa2e8ad6ee405365271869a4Chris Lattner DF->setLinkage(SF->getLinkage()); 63935956558e26e655aaa2e8ad6ee405365271869a4Chris Lattner 64035956558e26e655aaa2e8ad6ee405365271869a4Chris Lattner } else if (DF->hasWeakLinkage() || DF->hasLinkOnceLinkage()) { 64172ac148d4964fbff950fe11a0eeeda73973b849bChris Lattner // At this point we know that SF has LinkOnce or External linkage. 64272ac148d4964fbff950fe11a0eeeda73973b849bChris Lattner ValueMap.insert(std::make_pair(SF, DF)); 64372ac148d4964fbff950fe11a0eeeda73973b849bChris Lattner if (!SF->hasLinkOnceLinkage()) // Don't inherit linkonce linkage 64472ac148d4964fbff950fe11a0eeeda73973b849bChris Lattner DF->setLinkage(SF->getLinkage()); 64572ac148d4964fbff950fe11a0eeeda73973b849bChris Lattner 646c2b97d43a074445c6856d69538a95de09450c26eChris Lattner } else if (SF->getLinkage() != DF->getLinkage()) { 6470fec08eb58dd9fffeb72c584aa61a59d71111c8dChris Lattner return Error(Err, "Functions named '" + SF->getName() + 6480fec08eb58dd9fffeb72c584aa61a59d71111c8dChris Lattner "' have different linkage specifiers!"); 649c2b97d43a074445c6856d69538a95de09450c26eChris Lattner } else if (SF->hasExternalLinkage()) { 650c2b97d43a074445c6856d69538a95de09450c26eChris Lattner // The function is defined in both modules!! 651c2b97d43a074445c6856d69538a95de09450c26eChris Lattner return Error(Err, "Function '" + 65272cf7df6a364c213a94d01e1f0f8d918940c8416Chris Lattner ToStr(SF->getFunctionType(), Src) + "':\"" + 653c2b97d43a074445c6856d69538a95de09450c26eChris Lattner SF->getName() + "\" - Function is already defined!"); 654c2b97d43a074445c6856d69538a95de09450c26eChris Lattner } else { 655c2b97d43a074445c6856d69538a95de09450c26eChris Lattner assert(0 && "Unknown linkage configuration found!"); 6565c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner } 6575c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner } 6585c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner return false; 6595c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner} 6605c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner 661c8cc4cb03bd90f89be7fe1649542a2d5ae689632Chris Lattner// LinkFunctionBody - Copy the source function over into the dest function and 662c8cc4cb03bd90f89be7fe1649542a2d5ae689632Chris Lattner// fix up references to values. At this point we know that Dest is an external 663c8cc4cb03bd90f89be7fe1649542a2d5ae689632Chris Lattner// function, and that Src is not. 6645c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner// 66579df7c0aaa18129e55968c8783ef8346807bd4afChris Lattnerstatic bool LinkFunctionBody(Function *Dest, const Function *Src, 6665c2d335d86579941b71816196a95a64b277e8963Chris Lattner std::map<const Value*, Value*> &GlobalMap, 6675c2d335d86579941b71816196a95a64b277e8963Chris Lattner std::string *Err) { 6685c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner assert(Src && Dest && Dest->isExternal() && !Src->isExternal()); 6695c2d335d86579941b71816196a95a64b277e8963Chris Lattner std::map<const Value*, Value*> LocalMap; // Map for function local values 6705c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner 671c8cc4cb03bd90f89be7fe1649542a2d5ae689632Chris Lattner // Go through and convert function arguments over... 67269da5cf26143e4542d4bf8c78ffac6d079efe5c9Chris Lattner Function::aiterator DI = Dest->abegin(); 67318961504fc2b299578dba817900a0696cf3ccc4dChris Lattner for (Function::const_aiterator I = Src->abegin(), E = Src->aend(); 67469da5cf26143e4542d4bf8c78ffac6d079efe5c9Chris Lattner I != E; ++I, ++DI) { 67569da5cf26143e4542d4bf8c78ffac6d079efe5c9Chris Lattner DI->setName(I->getName()); // Copy the name information over... 6765c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner 6775c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner // Add a mapping to our local map 67869da5cf26143e4542d4bf8c78ffac6d079efe5c9Chris Lattner LocalMap.insert(std::make_pair(I, DI)); 6795c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner } 6805c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner 6815c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner // Loop over all of the basic blocks, copying the instructions over... 6825c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner // 68379df7c0aaa18129e55968c8783ef8346807bd4afChris Lattner for (Function::const_iterator I = Src->begin(), E = Src->end(); I != E; ++I) { 684c8cc4cb03bd90f89be7fe1649542a2d5ae689632Chris Lattner // Create new basic block and add to mapping and the Dest function... 68518961504fc2b299578dba817900a0696cf3ccc4dChris Lattner BasicBlock *DBB = new BasicBlock(I->getName(), Dest); 68618961504fc2b299578dba817900a0696cf3ccc4dChris Lattner LocalMap.insert(std::make_pair(I, DBB)); 6875c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner 6885c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner // Loop over all of the instructions in the src basic block, copying them 6895c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner // over. Note that this is broken in a strict sense because the cloned 6905c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner // instructions will still be referencing values in the Src module, not 6915c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner // the remapped values. In our case, however, we will not get caught and 6925c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner // so we can delay patching the values up until later... 6935c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner // 69418961504fc2b299578dba817900a0696cf3ccc4dChris Lattner for (BasicBlock::const_iterator II = I->begin(), IE = I->end(); 6955c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner II != IE; ++II) { 69618961504fc2b299578dba817900a0696cf3ccc4dChris Lattner Instruction *DI = II->clone(); 69718961504fc2b299578dba817900a0696cf3ccc4dChris Lattner DI->setName(II->getName()); 6985c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner DBB->getInstList().push_back(DI); 69918961504fc2b299578dba817900a0696cf3ccc4dChris Lattner LocalMap.insert(std::make_pair(II, DI)); 7005c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner } 7015c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner } 7025c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner 703c8cc4cb03bd90f89be7fe1649542a2d5ae689632Chris Lattner // At this point, all of the instructions and values of the function are now 704c8cc4cb03bd90f89be7fe1649542a2d5ae689632Chris Lattner // copied over. The only problem is that they are still referencing values in 705c8cc4cb03bd90f89be7fe1649542a2d5ae689632Chris Lattner // the Source function as operands. Loop through all of the operands of the 706c8cc4cb03bd90f89be7fe1649542a2d5ae689632Chris Lattner // functions and patch them up to point to the local versions... 7075c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner // 70818961504fc2b299578dba817900a0696cf3ccc4dChris Lattner for (Function::iterator BB = Dest->begin(), BE = Dest->end(); BB != BE; ++BB) 70918961504fc2b299578dba817900a0696cf3ccc4dChris Lattner for (BasicBlock::iterator I = BB->begin(), E = BB->end(); I != E; ++I) 71018961504fc2b299578dba817900a0696cf3ccc4dChris Lattner for (Instruction::op_iterator OI = I->op_begin(), OE = I->op_end(); 711221d688a5ef21a22c2368c9fff0e92d7966c95e5Chris Lattner OI != OE; ++OI) 712221d688a5ef21a22c2368c9fff0e92d7966c95e5Chris Lattner *OI = RemapOperand(*OI, LocalMap, &GlobalMap); 7135c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner 7145c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner return false; 7155c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner} 7165c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner 7175c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner 718c8cc4cb03bd90f89be7fe1649542a2d5ae689632Chris Lattner// LinkFunctionBodies - Link in the function bodies that are defined in the 719c8cc4cb03bd90f89be7fe1649542a2d5ae689632Chris Lattner// source module into the DestModule. This consists basically of copying the 720c8cc4cb03bd90f89be7fe1649542a2d5ae689632Chris Lattner// function over and fixing up references to values. 7215c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner// 72279df7c0aaa18129e55968c8783ef8346807bd4afChris Lattnerstatic bool LinkFunctionBodies(Module *Dest, const Module *Src, 7235c2d335d86579941b71816196a95a64b277e8963Chris Lattner std::map<const Value*, Value*> &ValueMap, 7245c2d335d86579941b71816196a95a64b277e8963Chris Lattner std::string *Err) { 7255c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner 726c8cc4cb03bd90f89be7fe1649542a2d5ae689632Chris Lattner // Loop over all of the functions in the src module, mapping them over as we 727c8cc4cb03bd90f89be7fe1649542a2d5ae689632Chris Lattner // go 7285c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner // 72918961504fc2b299578dba817900a0696cf3ccc4dChris Lattner for (Module::const_iterator SF = Src->begin(), E = Src->end(); SF != E; ++SF){ 73018961504fc2b299578dba817900a0696cf3ccc4dChris Lattner if (!SF->isExternal()) { // No body if function is external 73118961504fc2b299578dba817900a0696cf3ccc4dChris Lattner Function *DF = cast<Function>(ValueMap[SF]); // Destination function 732c2d774b6c1d38421c435b6d3cfaa10402c900aebChris Lattner 73318961504fc2b299578dba817900a0696cf3ccc4dChris Lattner // DF not external SF external? 73435956558e26e655aaa2e8ad6ee405365271869a4Chris Lattner if (DF->isExternal()) { 73535956558e26e655aaa2e8ad6ee405365271869a4Chris Lattner // Only provide the function body if there isn't one already. 73635956558e26e655aaa2e8ad6ee405365271869a4Chris Lattner if (LinkFunctionBody(DF, SF, ValueMap, Err)) 73735956558e26e655aaa2e8ad6ee405365271869a4Chris Lattner return true; 738c2d774b6c1d38421c435b6d3cfaa10402c900aebChris Lattner } 739c2d774b6c1d38421c435b6d3cfaa10402c900aebChris Lattner } 7405c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner } 7415c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner return false; 7425c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner} 7435c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner 7448166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner// LinkAppendingVars - If there were any appending global variables, link them 7458166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner// together now. Return true on error. 7468166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner// 7478166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattnerstatic bool LinkAppendingVars(Module *M, 7488166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner std::multimap<std::string, GlobalVariable *> &AppendingVars, 7498166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner std::string *ErrorMsg) { 7508166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner if (AppendingVars.empty()) return false; // Nothing to do. 7518166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner 7528166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner // Loop over the multimap of appending vars, processing any variables with the 7538166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner // same name, forming a new appending global variable with both of the 7548166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner // initializers merged together, then rewrite references to the old variables 7558166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner // and delete them. 7568166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner // 7578166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner std::vector<Constant*> Inits; 7588166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner while (AppendingVars.size() > 1) { 7598166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner // Get the first two elements in the map... 7608166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner std::multimap<std::string, 7618166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner GlobalVariable*>::iterator Second = AppendingVars.begin(), First=Second++; 7628166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner 7638166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner // If the first two elements are for different names, there is no pair... 7648166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner // Otherwise there is a pair, so link them together... 7658166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner if (First->first == Second->first) { 7668166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner GlobalVariable *G1 = First->second, *G2 = Second->second; 7678166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner const ArrayType *T1 = cast<ArrayType>(G1->getType()->getElementType()); 7688166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner const ArrayType *T2 = cast<ArrayType>(G2->getType()->getElementType()); 7698166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner 7708166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner // Check to see that they two arrays agree on type... 7718166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner if (T1->getElementType() != T2->getElementType()) 7728166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner return Error(ErrorMsg, 7738166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner "Appending variables with different element types need to be linked!"); 7748166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner if (G1->isConstant() != G2->isConstant()) 7758166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner return Error(ErrorMsg, 7768166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner "Appending variables linked with different const'ness!"); 7778166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner 7788166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner unsigned NewSize = T1->getNumElements() + T2->getNumElements(); 7798166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner ArrayType *NewType = ArrayType::get(T1->getElementType(), NewSize); 7808166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner 7818166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner // Create the new global variable... 7828166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner GlobalVariable *NG = 7838166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner new GlobalVariable(NewType, G1->isConstant(), G1->getLinkage(), 7848166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner /*init*/0, First->first, M); 7858166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner 7868166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner // Merge the initializer... 7878166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner Inits.reserve(NewSize); 788de512b5b2edebe9c9021a92c7c7a9ae9fbc380d6Chris Lattner if (ConstantArray *I = dyn_cast<ConstantArray>(G1->getInitializer())) { 789de512b5b2edebe9c9021a92c7c7a9ae9fbc380d6Chris Lattner for (unsigned i = 0, e = T1->getNumElements(); i != e; ++i) 790cc7ba49d85b66955516ff0d9574a70e1637dea36Alkis Evlogimenos Inits.push_back(I->getOperand(i)); 791de512b5b2edebe9c9021a92c7c7a9ae9fbc380d6Chris Lattner } else { 792de512b5b2edebe9c9021a92c7c7a9ae9fbc380d6Chris Lattner assert(isa<ConstantAggregateZero>(G1->getInitializer())); 793de512b5b2edebe9c9021a92c7c7a9ae9fbc380d6Chris Lattner Constant *CV = Constant::getNullValue(T1->getElementType()); 794de512b5b2edebe9c9021a92c7c7a9ae9fbc380d6Chris Lattner for (unsigned i = 0, e = T1->getNumElements(); i != e; ++i) 795de512b5b2edebe9c9021a92c7c7a9ae9fbc380d6Chris Lattner Inits.push_back(CV); 796de512b5b2edebe9c9021a92c7c7a9ae9fbc380d6Chris Lattner } 797de512b5b2edebe9c9021a92c7c7a9ae9fbc380d6Chris Lattner if (ConstantArray *I = dyn_cast<ConstantArray>(G2->getInitializer())) { 798de512b5b2edebe9c9021a92c7c7a9ae9fbc380d6Chris Lattner for (unsigned i = 0, e = T2->getNumElements(); i != e; ++i) 799cc7ba49d85b66955516ff0d9574a70e1637dea36Alkis Evlogimenos Inits.push_back(I->getOperand(i)); 800de512b5b2edebe9c9021a92c7c7a9ae9fbc380d6Chris Lattner } else { 801de512b5b2edebe9c9021a92c7c7a9ae9fbc380d6Chris Lattner assert(isa<ConstantAggregateZero>(G2->getInitializer())); 802de512b5b2edebe9c9021a92c7c7a9ae9fbc380d6Chris Lattner Constant *CV = Constant::getNullValue(T2->getElementType()); 803de512b5b2edebe9c9021a92c7c7a9ae9fbc380d6Chris Lattner for (unsigned i = 0, e = T2->getNumElements(); i != e; ++i) 804de512b5b2edebe9c9021a92c7c7a9ae9fbc380d6Chris Lattner Inits.push_back(CV); 805de512b5b2edebe9c9021a92c7c7a9ae9fbc380d6Chris Lattner } 8068166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner NG->setInitializer(ConstantArray::get(NewType, Inits)); 8078166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner Inits.clear(); 8088166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner 8098166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner // Replace any uses of the two global variables with uses of the new 8108166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner // global... 8118166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner 8128166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner // FIXME: This should rewrite simple/straight-forward uses such as 8138166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner // getelementptr instructions to not use the Cast! 81400dc4796132933e76fe2b834ca087e42621c175aReid Spencer G1->replaceAllUsesWith(ConstantExpr::getCast(NG, G1->getType())); 81500dc4796132933e76fe2b834ca087e42621c175aReid Spencer G2->replaceAllUsesWith(ConstantExpr::getCast(NG, G2->getType())); 8168166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner 8178166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner // Remove the two globals from the module now... 8188166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner M->getGlobalList().erase(G1); 8198166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner M->getGlobalList().erase(G2); 8208166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner 8218166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner // Put the new global into the AppendingVars map so that we can handle 8228166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner // linking of more than two vars... 8238166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner Second->second = NG; 8248166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner } 8258166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner AppendingVars.erase(First); 8268166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner } 8278166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner 8288166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner return false; 8298166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner} 83052f7e908cb634f9b9b539d5c6670b8a065478915Chris Lattner 83152f7e908cb634f9b9b539d5c6670b8a065478915Chris Lattner 83252f7e908cb634f9b9b539d5c6670b8a065478915Chris Lattner// LinkModules - This function links two modules together, with the resulting 83352f7e908cb634f9b9b539d5c6670b8a065478915Chris Lattner// left module modified to be the composite of the two input modules. If an 83452f7e908cb634f9b9b539d5c6670b8a065478915Chris Lattner// error occurs, true is returned and ErrorMsg (if not null) is set to indicate 8355c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner// the problem. Upon failure, the Dest module could be in a modified state, and 8365c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner// shouldn't be relied on to be consistent. 83752f7e908cb634f9b9b539d5c6670b8a065478915Chris Lattner// 838f7703df4968084c18c248c1feea9961c19a32e6aChris Lattnerbool llvm::LinkModules(Module *Dest, const Module *Src, std::string *ErrorMsg) { 83957a0efa32240ef03ea318f9ba7680fd2b8609c6eReid Spencer assert(Dest != 0 && "Invalid Destination module"); 84057a0efa32240ef03ea318f9ba7680fd2b8609c6eReid Spencer assert(Src != 0 && "Invalid Source Module"); 84157a0efa32240ef03ea318f9ba7680fd2b8609c6eReid Spencer 842873c5e7859c1534bf92c9e2747f2b70685059598Chris Lattner if (Dest->getEndianness() == Module::AnyEndianness) 843873c5e7859c1534bf92c9e2747f2b70685059598Chris Lattner Dest->setEndianness(Src->getEndianness()); 844873c5e7859c1534bf92c9e2747f2b70685059598Chris Lattner if (Dest->getPointerSize() == Module::AnyPointerSize) 845873c5e7859c1534bf92c9e2747f2b70685059598Chris Lattner Dest->setPointerSize(Src->getPointerSize()); 846873c5e7859c1534bf92c9e2747f2b70685059598Chris Lattner 847873c5e7859c1534bf92c9e2747f2b70685059598Chris Lattner if (Src->getEndianness() != Module::AnyEndianness && 848873c5e7859c1534bf92c9e2747f2b70685059598Chris Lattner Dest->getEndianness() != Src->getEndianness()) 84943a9994c0164848d44527060da72985c75183a48Chris Lattner std::cerr << "WARNING: Linking two modules of different endianness!\n"; 850873c5e7859c1534bf92c9e2747f2b70685059598Chris Lattner if (Src->getPointerSize() != Module::AnyPointerSize && 851873c5e7859c1534bf92c9e2747f2b70685059598Chris Lattner Dest->getPointerSize() != Src->getPointerSize()) 85243a9994c0164848d44527060da72985c75183a48Chris Lattner std::cerr << "WARNING: Linking two modules of different pointer size!\n"; 8532c236f3e20a0fb84b5948efa6bb7bb60d759cb32Chris Lattner 85457a0efa32240ef03ea318f9ba7680fd2b8609c6eReid Spencer // Update the destination module's dependent libraries list with the libraries 85557a0efa32240ef03ea318f9ba7680fd2b8609c6eReid Spencer // from the source module. There's no opportunity for duplicates here as the 85657a0efa32240ef03ea318f9ba7680fd2b8609c6eReid Spencer // Module ensures that duplicate insertions are discarded. 85757a0efa32240ef03ea318f9ba7680fd2b8609c6eReid Spencer Module::lib_iterator SI = Src->lib_begin(); 85857a0efa32240ef03ea318f9ba7680fd2b8609c6eReid Spencer Module::lib_iterator SE = Src->lib_end(); 85957a0efa32240ef03ea318f9ba7680fd2b8609c6eReid Spencer while ( SI != SE ) { 86057a0efa32240ef03ea318f9ba7680fd2b8609c6eReid Spencer Dest->addLibrary(*SI); 86157a0efa32240ef03ea318f9ba7680fd2b8609c6eReid Spencer ++SI; 86257a0efa32240ef03ea318f9ba7680fd2b8609c6eReid Spencer } 86357a0efa32240ef03ea318f9ba7680fd2b8609c6eReid Spencer 8642c236f3e20a0fb84b5948efa6bb7bb60d759cb32Chris Lattner // LinkTypes - Go through the symbol table of the Src module and see if any 8652c236f3e20a0fb84b5948efa6bb7bb60d759cb32Chris Lattner // types are named in the src module that are not named in the Dst module. 8662c236f3e20a0fb84b5948efa6bb7bb60d759cb32Chris Lattner // Make sure there are no type name conflicts. 8672c236f3e20a0fb84b5948efa6bb7bb60d759cb32Chris Lattner // 8682c236f3e20a0fb84b5948efa6bb7bb60d759cb32Chris Lattner if (LinkTypes(Dest, Src, ErrorMsg)) return true; 8692c236f3e20a0fb84b5948efa6bb7bb60d759cb32Chris Lattner 8705c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner // ValueMap - Mapping of values from what they used to be in Src, to what they 8715c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner // are now in Dest. 8725c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner // 8735c2d335d86579941b71816196a95a64b277e8963Chris Lattner std::map<const Value*, Value*> ValueMap; 8745c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner 8758166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner // AppendingVars - Keep track of global variables in the destination module 8768166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner // with appending linkage. After the module is linked together, they are 8778166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner // appended and the module is rewritten. 8788166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner // 8798166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner std::multimap<std::string, GlobalVariable *> AppendingVars; 8808166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner 8815a837defff581accc09048bea1cd839009e374a7Chris Lattner // GlobalsByName - The LLVM SymbolTable class fights our best efforts at 8825a837defff581accc09048bea1cd839009e374a7Chris Lattner // linking by separating globals by type. Until PR411 is fixed, we replicate 8835a837defff581accc09048bea1cd839009e374a7Chris Lattner // it's functionality here. 8845a837defff581accc09048bea1cd839009e374a7Chris Lattner std::map<std::string, GlobalValue*> GlobalsByName; 8855a837defff581accc09048bea1cd839009e374a7Chris Lattner 8865a837defff581accc09048bea1cd839009e374a7Chris Lattner for (Module::giterator I = Dest->gbegin(), E = Dest->gend(); I != E; ++I) { 8875a837defff581accc09048bea1cd839009e374a7Chris Lattner // Add all of the appending globals already in the Dest module to 8885a837defff581accc09048bea1cd839009e374a7Chris Lattner // AppendingVars. 889f41464618f41b92cf0a0bd14ccc57bce727fb33dChris Lattner if (I->hasAppendingLinkage()) 890f41464618f41b92cf0a0bd14ccc57bce727fb33dChris Lattner AppendingVars.insert(std::make_pair(I->getName(), I)); 8918166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner 8925a837defff581accc09048bea1cd839009e374a7Chris Lattner // Keep track of all globals by name. 8935a837defff581accc09048bea1cd839009e374a7Chris Lattner if (!I->hasInternalLinkage() && I->hasName()) 8945a837defff581accc09048bea1cd839009e374a7Chris Lattner GlobalsByName[I->getName()] = I; 8955a837defff581accc09048bea1cd839009e374a7Chris Lattner } 8965a837defff581accc09048bea1cd839009e374a7Chris Lattner 8975a837defff581accc09048bea1cd839009e374a7Chris Lattner // Keep track of all globals by name. 8985a837defff581accc09048bea1cd839009e374a7Chris Lattner for (Module::iterator I = Dest->begin(), E = Dest->end(); I != E; ++I) 8995a837defff581accc09048bea1cd839009e374a7Chris Lattner if (!I->hasInternalLinkage() && I->hasName()) 9005a837defff581accc09048bea1cd839009e374a7Chris Lattner GlobalsByName[I->getName()] = I; 9015a837defff581accc09048bea1cd839009e374a7Chris Lattner 9028166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner // Insert all of the globals in src into the Dest module... without linking 9038166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner // initializers (which could refer to functions not yet mapped over). 9048166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner // 9055a837defff581accc09048bea1cd839009e374a7Chris Lattner if (LinkGlobals(Dest, Src, ValueMap, AppendingVars, GlobalsByName, ErrorMsg)) 9065a837defff581accc09048bea1cd839009e374a7Chris Lattner return true; 9075c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner 908c8cc4cb03bd90f89be7fe1649542a2d5ae689632Chris Lattner // Link the functions together between the two modules, without doing function 909c8cc4cb03bd90f89be7fe1649542a2d5ae689632Chris Lattner // bodies... this just adds external function prototypes to the Dest 910c8cc4cb03bd90f89be7fe1649542a2d5ae689632Chris Lattner // function... We do this so that when we begin processing function bodies, 911c8cc4cb03bd90f89be7fe1649542a2d5ae689632Chris Lattner // all of the global values that may be referenced are available in our 912c8cc4cb03bd90f89be7fe1649542a2d5ae689632Chris Lattner // ValueMap. 9135c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner // 9145a837defff581accc09048bea1cd839009e374a7Chris Lattner if (LinkFunctionProtos(Dest, Src, ValueMap, GlobalsByName, ErrorMsg)) 9155a837defff581accc09048bea1cd839009e374a7Chris Lattner return true; 9165c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner 9176cdf1971bdf88ddd9a7d46b5f5f975497d68c38eChris Lattner // Update the initializers in the Dest module now that all globals that may 9186cdf1971bdf88ddd9a7d46b5f5f975497d68c38eChris Lattner // be referenced are in Dest. 9196cdf1971bdf88ddd9a7d46b5f5f975497d68c38eChris Lattner // 9206cdf1971bdf88ddd9a7d46b5f5f975497d68c38eChris Lattner if (LinkGlobalInits(Dest, Src, ValueMap, ErrorMsg)) return true; 9216cdf1971bdf88ddd9a7d46b5f5f975497d68c38eChris Lattner 922c8cc4cb03bd90f89be7fe1649542a2d5ae689632Chris Lattner // Link in the function bodies that are defined in the source module into the 923c8cc4cb03bd90f89be7fe1649542a2d5ae689632Chris Lattner // DestModule. This consists basically of copying the function over and 924c8cc4cb03bd90f89be7fe1649542a2d5ae689632Chris Lattner // fixing up references to values. 9255c377c524a6929cdaa683f3f034b3fc01526b264Chris Lattner // 92679df7c0aaa18129e55968c8783ef8346807bd4afChris Lattner if (LinkFunctionBodies(Dest, Src, ValueMap, ErrorMsg)) return true; 92752f7e908cb634f9b9b539d5c6670b8a065478915Chris Lattner 9288166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner // If there were any appending global variables, link them together now. 9298166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner // 9308166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner if (LinkAppendingVars(Dest, AppendingVars, ErrorMsg)) return true; 9318166e6eef6518da6f1f805e0d5e2bb22c15dd49cChris Lattner 93257a0efa32240ef03ea318f9ba7680fd2b8609c6eReid Spencer // If the source library's module id is in the dependent library list of the 93357a0efa32240ef03ea318f9ba7680fd2b8609c6eReid Spencer // destination library, remove it since that module is now linked in. 93457a0efa32240ef03ea318f9ba7680fd2b8609c6eReid Spencer sys::Path modId; 93557a0efa32240ef03ea318f9ba7680fd2b8609c6eReid Spencer modId.set_file(Src->getModuleIdentifier()); 93657a0efa32240ef03ea318f9ba7680fd2b8609c6eReid Spencer if (!modId.is_empty()) 93757a0efa32240ef03ea318f9ba7680fd2b8609c6eReid Spencer Dest->removeLibrary(modId.get_basename()); 93857a0efa32240ef03ea318f9ba7680fd2b8609c6eReid Spencer 93952f7e908cb634f9b9b539d5c6670b8a065478915Chris Lattner return false; 94052f7e908cb634f9b9b539d5c6670b8a065478915Chris Lattner} 9419466f5113ba859677a28887c3c7143065e702019Vikram S. Adve 942567bc2cc1ed4d610daceecbb4ff7f92ebde1b530Reid Spencer// vim: sw=2 943