From d0af43816193aac382276c878deb4e33ed76be1d Mon Sep 17 00:00:00 2001
From: Lei Zhang <antiagainst@google.com>
Date: Fri, 27 Mar 2020 18:52:15 -0400
Subject: [PATCH] [mlir][spirv] Add return to function to please MSVC

This suppresses the "not all control paths return a value" warning.
---
 mlir/lib/Dialect/SPIRV/SPIRVLowering.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/mlir/lib/Dialect/SPIRV/SPIRVLowering.cpp b/mlir/lib/Dialect/SPIRV/SPIRVLowering.cpp
index 3fd987b..776e242 100644
--- a/mlir/lib/Dialect/SPIRV/SPIRVLowering.cpp
+++ b/mlir/lib/Dialect/SPIRV/SPIRVLowering.cpp
@@ -18,6 +18,7 @@
 #include "llvm/ADT/StringExtras.h"
 #include "llvm/Support/Debug.h"
 
+#include <cstdint>
 #include <functional>
 
 #define DEBUG_TYPE "mlir-spirv-lowering"
@@ -136,6 +137,8 @@ SPIRVTypeConverter::getMemorySpaceForStorageClass(spirv::StorageClass storage) {
 
   switch (storage) { STORAGE_SPACE_MAP_LIST(STORAGE_SPACE_MAP_FN) }
 #undef STORAGE_SPACE_MAP_FN
+  llvm_unreachable("unhandled storage class!");
+  return UINT32_MAX;
 }
 
 Optional<spirv::StorageClass>
-- 
2.7.4