[RyuJIT] Devirtualize Comparer<T>.Default (#48160)

1 files changed, 4 insertions, 3 deletions

diff --git a/src/coreclr/jit/flowgraph.cpp b/src/coreclr/jit/flowgraph.cpp
index 594a59af14e..d6a9ed7642b 100644
--- a/src/coreclr/jit/flowgraph.cpp
+++ b/src/coreclr/jit/flowgraph.cpp
@@ -926,13 +926,14 @@ GenTreeCall* Compiler::fgGetStaticsCCtorHelper(CORINFO_CLASS_HANDLE cls, CorInfo
     GenTreeCall* result = gtNewHelperCallNode(helper, type, argList);
     result->gtFlags |= callFlags;
 
-    // If we're importing the special EqualityComparer<T>.Default
-    // intrinsic, flag the helper call. Later during inlining, we can
+    // If we're importing the special EqualityComparer<T>.Default or Comparer<T>.Default
+    // intrinsics, flag the helper call. Later during inlining, we can
     // remove the helper call if the associated field lookup is unused.
     if ((info.compFlags & CORINFO_FLG_JIT_INTRINSIC) != 0)
     {
         NamedIntrinsic ni = lookupNamedIntrinsic(info.compMethodHnd);
-        if (ni == NI_System_Collections_Generic_EqualityComparer_get_Default)
+        if ((ni == NI_System_Collections_Generic_EqualityComparer_get_Default) ||
+            (ni == NI_System_Collections_Generic_Comparer_get_Default))
         {
             JITDUMP("\nmarking helper call [%06u] as special dce...\n", result->gtTreeID);
             result->gtCallMoreFlags |= GTF_CALL_M_HELPER_SPECIAL_DCE;