Make Unsafe.AsRef inlineable (#14547)

The JIT inliner chokes on type mismatch on return. Make the method inlineable by round-tripping the value via local that avoids the type mismatch on return.
dotnet · Dec 16, 2016 · a0e1d73 · a0e1d73
1 parent 72701db
commit a0e1d73
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/src/System.Runtime.CompilerServices.Unsafe/src/System.Runtime.CompilerServices.Unsafe.il b/src/System.Runtime.CompilerServices.Unsafe/src/System.Runtime.CompilerServices.Unsafe.il
@@ -222,8 +222,12 @@
   .method public hidebysig static !!T& AsRef<T>(void* source) cil managed aggressiveinlining
   {
         .custom instance void System.Runtime.Versioning.NonVersionableAttribute::.ctor() = ( 01 00 00 00 )
+        .locals (int32&)
         .maxstack 1
         ldarg.0
+        // Roundtrip via a local to avoid type mismatch on return that the JIT inliner chokes on.
+        stloc.0
+        ldloc.0
         ret
   } // end of method Unsafe::AsRef