Add MethodImplOptions.AggressiveOptimization and use it for tiering (#20009)

Add MethodImplOptions.AggressiveOptimization and use it for tiering

Part of fix for https://github.com/dotnet/corefx/issues/32235
Workaround for https://github.com/dotnet/coreclr/issues/19751
- Added and set CORJIT_FLAG_AGGRESSIVE_OPT to indicate that a method is flagged with AggressiveOptimization
- For a method flagged with AggressiveOptimization, tiering uses a foreground tier 1 JIT on first call to the method, skipping the tier 0 JIT and call counting
- When tiering is disabled, a method flagged with AggressiveOptimization does not use r2r-pregenerated code
- R2r crossgen does not generate code for a method flagged with AggressiveOptimization

1 files changed, 12 insertions, 1 deletions

diff --git a/src/vm/jitinterface.cpp b/src/vm/jitinterface.cpp
index 2140d34bde..28e17e9e3e 100644
--- a/src/vm/jitinterface.cpp
+++ b/src/vm/jitinterface.cpp
@@ -6776,6 +6776,17 @@ DWORD CEEInfo::getMethodAttribsInternal (CORINFO_METHOD_HANDLE ftn)
         result |= CORINFO_FLG_DONT_INLINE_CALLER;
     }
 
+    // Check for the aggressive optimization directive. AggressiveOptimization only makes sense for IL methods.
+    DWORD ilMethodImplAttribs = 0;
+    if (pMD->IsIL())
+    {
+        ilMethodImplAttribs = pMD->GetImplAttrs();
+        if (IsMiAggressiveOptimization(ilMethodImplAttribs))
+        {
+            result |= CORINFO_FLG_AGGRESSIVE_OPT;
+        }
+    }
+
     // Check for an inlining directive.
     if (pMD->IsNotInline())
     {
@@ -6783,7 +6794,7 @@ DWORD CEEInfo::getMethodAttribsInternal (CORINFO_METHOD_HANDLE ftn)
         result |= CORINFO_FLG_DONT_INLINE;
     }
     // AggressiveInlining only makes sense for IL methods.
-    else if (pMD->IsIL() && IsMiAggressiveInlining(pMD->GetImplAttrs()))
+    else if (pMD->IsIL() && IsMiAggressiveInlining(ilMethodImplAttribs))
     {
         result |= CORINFO_FLG_FORCEINLINE;
     }