[mlir] Fix bots after bytecode support was added in D131747

* Fix ambiguous Twine constructor call
* Ensure shift is 64-bit (for MSVC)
* Disable bytecode tests on s390x (we don't support big endian right now)

1 files changed, 1 insertions, 1 deletions

diff --git a/mlir/lib/Bytecode/Reader/BytecodeReader.cpp b/mlir/lib/Bytecode/Reader/BytecodeReader.cpp
index 3168ce6f9c2f..c23640d1cfa0 100644
--- a/mlir/lib/Bytecode/Reader/BytecodeReader.cpp
+++ b/mlir/lib/Bytecode/Reader/BytecodeReader.cpp
@@ -40,7 +40,7 @@ static std::string toString(bytecode::Section::ID sectionID) {
   case bytecode::Section::kIR:
     return "IR (4)";
   default:
-    return ("Unknown (" + Twine(sectionID) + ")").str();
+    return ("Unknown (" + Twine(static_cast<unsigned>(sectionID)) + ")").str();
   }
 }