enable vector-backend to take llvm bitcode input

Change-Id: If636682bb93cbc7bdfd4b54a45c5d3a19c36bc28

Author: gang chen

IGC/VectorCompiler/igcdeps/src/TranslationInterface.cpp

@@ -134,6 +134,9 @@ static void adjustFileType(TC::TB_DATA_FORMAT DataFormat,
   case TC::TB_DATA_FORMAT::TB_DATA_FORMAT_LLVM_TEXT:
     Opts.FType = vc::FileType::LLVM_TEXT;
     return;
+  case TC::TB_DATA_FORMAT::TB_DATA_FORMAT_LLVM_BINARY:
+      Opts.FType = vc::FileType::LLVM_BINARY;
+      return;
   case TC::TB_DATA_FORMAT::TB_DATA_FORMAT_SPIR_V:
     Opts.FType = vc::FileType::SPIRV;
     return;

IGC/VectorCompiler/include/vc/GenXCodeGen/GenXWrapper.h

@@ -137,7 +137,7 @@ struct CompileOutput {
 
 using CompileOutput = std::variant<cm::CompileOutput, ocl::CompileOutput>;
 
-enum class FileType { SPIRV, LLVM_TEXT };
+enum class FileType { SPIRV, LLVM_TEXT, LLVM_BINARY };
 
 enum class OptimizerLevel { None, Full };
 

IGC/VectorCompiler/lib/GenXCodeGen/GenXWrapper.cpp

@@ -202,6 +202,29 @@ getModuleFromLLVMText(ArrayRef<char> Input, LLVMContext &C) {
   return ExpModule;
 }
 
+static Expected<std::unique_ptr<llvm::Module>>
+getModuleFromLLVMBinary(ArrayRef<char> Input, LLVMContext& C) {
+
+  llvm::MemoryBufferRef BufferRef(llvm::StringRef(Input.data(), Input.size()),
+    "Deserialized LLVM Module");
+  auto ExpModule = llvm::parseBitcodeFile(BufferRef, C);
+
+  if (!ExpModule)
+    return llvm::handleExpected(
+        std::move(ExpModule),
+        []() -> llvm::Error {
+          IGC_ASSERT_EXIT_MESSAGE(0, "Should create new error");
+        },
+        [](const llvm::ErrorInfoBase& E) {
+          return make_error<vc::BadBitcodeError>(E.message());
+        });
+
+  if (verifyModule(*ExpModule.get()))
+    return make_error<vc::InvalidModuleError>();
+
+  return ExpModule;
+}
+
 static Expected<std::unique_ptr<llvm::Module>>
 getModule(ArrayRef<char> Input, vc::FileType FType,
           ArrayRef<uint32_t> SpecConstIds, ArrayRef<uint64_t> SpecConstValues,
@@ -211,6 +234,8 @@ getModule(ArrayRef<char> Input, vc::FileType FType,
     return getModuleFromSPIRV(Input, SpecConstIds, SpecConstValues, Ctx);
   case vc::FileType::LLVM_TEXT:
     return getModuleFromLLVMText(Input, Ctx);
+  case vc::FileType::LLVM_BINARY:
+    return getModuleFromLLVMBinary(Input, Ctx);
   }
   IGC_ASSERT_EXIT_MESSAGE(0, "Unknown input kind");
 }