[llvm] Fix MSVC warning in benchmark (PR #147357)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-third-party-benchmark

Author: Daniel Paoliello (dpaoliello)

<details>
<summary>Changes</summary>

Building LLVM with MSVC is raising the following warning:

```
llvm\third-party\benchmark\src\sysinfo.cc(375): warning C4062: enumerator 'CacheUnknown' in switch of enum '_PROCESSOR_CACHE_TYPE' is not handled
```

This change resolves the warning by moving the `Unknown` type into a case block for `CacheUnknown`.

Not sure how this code flows back into the original source.

---
Full diff: https://github.com/llvm/llvm-project/pull/147357.diff


1 Files Affected:

- (modified) third-party/benchmark/src/sysinfo.cc (+3-1) 


``````````diff
diff --git a/third-party/benchmark/src/sysinfo.cc b/third-party/benchmark/src/sysinfo.cc
index 3993ae17f7fc4..837be8f9cf891 100644
--- a/third-party/benchmark/src/sysinfo.cc
+++ b/third-party/benchmark/src/sysinfo.cc
@@ -358,7 +358,6 @@ std::vector<CPUInfo::CacheInfo> GetCacheSizesWindows() {
     C.num_sharing = static_cast<int>(b.count());
     C.level = cache.Level;
     C.size = cache.Size;
-    C.type = "Unknown";
     switch (cache.Type) {
       case CacheUnified:
         C.type = "Unified";
@@ -372,6 +371,9 @@ std::vector<CPUInfo::CacheInfo> GetCacheSizesWindows() {
       case CacheTrace:
         C.type = "Trace";
         break;
+      case CacheUnknown:
+        C.type = "Unknown";
+        break;
     }
     res.push_back(C);
   }

``````````

</details>


https://github.com/llvm/llvm-project/pull/147357