compiler/rustc_llvm/llvm-wrapper/Linker.cpp

   1 #include "llvm/Linker/Linker.h"
   2
   3 #include "LLVMWrapper.h"
   4
   5 using namespace llvm;
   6
   7 struct RustLinker {
   8   Linker L;
   9   LLVMContext &Ctx;
  10
  11   RustLinker(Module &M) :
  12     L(M),
  13     Ctx(M.getContext())
  14   {}
  15 };
  16
  17 extern "C" RustLinker*
  18 LLVMRustLinkerNew(LLVMModuleRef DstRef) {
  19   Module *Dst = unwrap(DstRef);
  20
  21   return new RustLinker(*Dst);
  22 }
  23
  24 extern "C" void
  25 LLVMRustLinkerFree(RustLinker *L) {
  26   delete L;
  27 }
  28
  29 extern "C" bool
  30 LLVMRustLinkerAdd(RustLinker *L, char *BC, size_t Len) {
  31   std::unique_ptr<MemoryBuffer> Buf =
  32       MemoryBuffer::getMemBufferCopy(StringRef(BC, Len));
  33
  34   Expected<std::unique_ptr<Module>> SrcOrError =
  35       llvm::getLazyBitcodeModule(Buf->getMemBufferRef(), L->Ctx);
  36   if (!SrcOrError) {
  37     LLVMRustSetLastError(toString(SrcOrError.takeError()).c_str());
  38     return false;
  39   }
  40
  41   auto Src = std::move(*SrcOrError);
  42
  43   if (L->L.linkInModule(std::move(Src))) {
  44     LLVMRustSetLastError("");
  45     return false;
  46   }
  47   return true;
  48 }