/** This utility function takes serialized binary LLVM bitcode and adds its
definitions to the given module. Functions in the bitcode that can be
mapped to ispc functions are also added to the symbol table.
@param bitcode Binary LLVM bitcode (e.g. the contents of a *.bc file)
@param length Length of the bitcode buffer
@param module Module to link the bitcode into
@param symbolTable Symbol table to add definitions to
*/
void
AddBitcodeToModule(const unsigned char *bitcode, int length,
llvm::Module *module, SymbolTable *symbolTable) {
std::string bcErr;
llvm::StringRef sb = llvm::StringRef((char *)bitcode, length);
llvm::MemoryBuffer *bcBuf = llvm::MemoryBuffer::getMemBuffer(sb);
llvm::Module *bcModule = llvm::ParseBitcodeFile(bcBuf, *g->ctx, &bcErr);
if (!bcModule)
Error(SourcePos(), "Error parsing stdlib bitcode: %s", bcErr.c_str());
else {
// FIXME: this feels like a bad idea, but the issue is that when we
// set the llvm::Module's target triple in the ispc Module::Module
// constructor, we start by calling llvm::sys::getHostTriple() (and
// then change the arch if needed). Somehow that ends up giving us
// strings like 'x86_64-apple-darwin11.0.0', while the stuff we
// compile to bitcode with clang has module triples like
// 'i386-apple-macosx10.7.0'. And then LLVM issues a warning about
// linking together modules with incompatible target triples..
llvm::Triple mTriple(m->module->getTargetTriple());
llvm::Triple bcTriple(bcModule->getTargetTriple());
Assert(bcTriple.getArch() == llvm::Triple::UnknownArch ||
mTriple.getArch() == bcTriple.getArch());
Assert(bcTriple.getVendor() == llvm::Triple::UnknownVendor ||
mTriple.getVendor() == bcTriple.getVendor());
bcModule->setTargetTriple(mTriple.str());
// This is also suboptimal; LLVM issues a warning about linking
// modules with different datalayouts, due to things like
// bulitins-c.c having the regular IA layout, but the generic
// targets having a layout with 16-bit alignment for 16xi1 vectors.
// As long as builtins-c.c doesn't have any 16xi1 vector types
// (which it shouldn't!), then this override is safe.
if (g->target.isa == Target::GENERIC)
bcModule->setDataLayout(module->getDataLayout());
std::string(linkError);
if (llvm::Linker::LinkModules(module, bcModule,
llvm::Linker::DestroySource,
&linkError))
Error(SourcePos(), "Error linking stdlib bitcode: %s", linkError.c_str());
lSetInternalFunctions(module);
if (symbolTable != NULL)
lAddModuleSymbols(module, symbolTable);
lCheckModuleIntrinsics(module);
}
}
/** This utility function takes serialized binary LLVM bitcode and adds its
definitions to the given module. Functions in the bitcode that can be
mapped to ispc functions are also added to the symbol table.
@param bitcode Binary LLVM bitcode (e.g. the contents of a *.bc file)
@param length Length of the bitcode buffer
@param module Module to link the bitcode into
@param symbolTable Symbol table to add definitions to
*/
void
AddBitcodeToModule(const unsigned char *bitcode, int length,
llvm::Module *module, SymbolTable *symbolTable) {
std::string bcErr;
llvm::StringRef sb = llvm::StringRef((char *)bitcode, length);
llvm::MemoryBuffer *bcBuf = llvm::MemoryBuffer::getMemBuffer(sb);
llvm::Module *bcModule = llvm::ParseBitcodeFile(bcBuf, *g->ctx, &bcErr);
if (!bcModule)
Error(SourcePos(), "Error parsing stdlib bitcode: %s", bcErr.c_str());
else {
// FIXME: this feels like a bad idea, but the issue is that when we
// set the llvm::Module's target triple in the ispc Module::Module
// constructor, we start by calling llvm::sys::getHostTriple() (and
// then change the arch if needed). Somehow that ends up giving us
// strings like 'x86_64-apple-darwin11.0.0', while the stuff we
// compile to bitcode with clang has module triples like
// 'i386-apple-macosx10.7.0'. And then LLVM issues a warning about
// linking together modules with incompatible target triples..
llvm::Triple mTriple(m->module->getTargetTriple());
llvm::Triple bcTriple(bcModule->getTargetTriple());
Assert(bcTriple.getArch() == llvm::Triple::UnknownArch ||
mTriple.getArch() == bcTriple.getArch());
Assert(bcTriple.getVendor() == llvm::Triple::UnknownVendor ||
mTriple.getVendor() == bcTriple.getVendor());
bcModule->setTargetTriple(mTriple.str());
std::string(linkError);
if (llvm::Linker::LinkModules(module, bcModule,
#if defined(LLVM_3_0) || defined(LLVM_3_0svn) || defined(LLVM_3_1svn)
llvm::Linker::DestroySource,
#endif // LLVM_3_0
&linkError))
Error(SourcePos(), "Error linking stdlib bitcode: %s", linkError.c_str());
lSetInternalFunctions(module);
if (symbolTable != NULL)
lAddModuleSymbols(module, symbolTable);
lCheckModuleIntrinsics(module);
}
}