LLVM 7.0 support (#1048)

src/codegen/llvm/llvm_module.cc

@@ -68,7 +68,11 @@ class LLVMModuleNode final : public runtime::ModuleNode {
     CHECK_EQ(ecode.value(), 0) << "Cannot open file: " << file_name
                                << " " << ecode.message();
     if (fmt == "o" || fmt == "obj") {
+#if TVM_LLVM_VERSION <= 60
       std::unique_ptr<llvm::Module> m = llvm::CloneModule(mptr_);
+#else
+      std::unique_ptr<llvm::Module> m = llvm::CloneModule(*mptr_);
+#endif
       llvm::legacy::PassManager pass;
       CHECK(tm_);
       CHECK(tm_->addPassesToEmitFile(
@@ -76,7 +80,11 @@ class LLVMModuleNode final : public runtime::ModuleNode {
           << "Cannot emit target CGFT_ObjectFile";
       pass.run(*m);
     } else if (fmt == "s" || fmt == "asm") {
+#if TVM_LLVM_VERSION <= 60
       std::unique_ptr<llvm::Module> m = llvm::CloneModule(mptr_);
+#else
+      std::unique_ptr<llvm::Module> m = llvm::CloneModule(*mptr_);
+#endif
       llvm::legacy::PassManager pass;
       CHECK(tm_);
       CHECK(tm_->addPassesToEmitFile(
@@ -86,7 +94,11 @@ class LLVMModuleNode final : public runtime::ModuleNode {
     } else if (fmt == "ll") {
       mptr_->print(dest, nullptr);
     } else if (fmt == "bc") {
+#if TVM_LLVM_VERSION <= 60
       llvm::WriteBitcodeToFile(mptr_, dest);
+#else
+      llvm::WriteBitcodeToFile(*mptr_, dest);
+#endif
     } else {
       LOG(FATAL) << "Do not know how to save file "
                  << file_name << " with format=\'"<< format << "\'";