Fix typo: `_TARGET_X86` -> `_TARGET_X86_` (#25788)

This typo was in #24989 so would be a new regression in 3.0.
In an x86 build, it causes us to not get the cache size correct,
leading us to use a smaller default cache size and do more GCs.

Tested with GCPerfSim and this PR reduces TotalNumberGCs by 33% using an x86 build.

diff --git a/src/vm/util.cpp b/src/vm/util.cpp
index da6d779..c8b9e9a 100644 (file)
--- a/src/vm/util.cpp
+++ b/src/vm/util.cpp
@@ -1817,7 +1817,7 @@ size_t GetCacheSizePerLogicalCpu(BOOL bTrueSize)
     maxSize = maxTrueSize = GetLogicalProcessorCacheSizeFromOS() ; // Returns the size of the highest level processor cache
 #endif
 
-#if defined (_TARGET_X86) || defined(_TARGET_AMD64_)
+#if defined (_TARGET_X86_) || defined(_TARGET_AMD64_)
     if (maxSize == 0)
     {
         maxSize = maxTrueSize = GetCacheSizeFromCpuId();