Revert "Dynamic generic dictionary expansion feature (dotnet#32270)" (dotnet#33310)

This reverts commit 7182559.

(cherry picked from commit dca3429)

Author: Fadi Hanna

docs/design/coreclr/botr/shared-generics.md

@@ -6957,7 +6957,7 @@ NativeImageDumper::DumpMethodTable( PTR_MethodTable mt, const char * name,
                                    //if there is a layout, use it to compute
                                    //the size, otherwise there is just the one
                                    //entry.
-                                   DictionaryLayout::GetDictionarySizeFromLayout(mt->GetNumGenericArgs(), layout),
+                                   DictionaryLayout::GetFirstDictionaryBucketSize(mt->GetNumGenericArgs(), layout),
                                    METHODTABLES );
 
             DisplayStartArrayWithOffset( m_pEntries, NULL, Dictionary,
@@ -7983,7 +7983,7 @@ void NativeImageDumper::DumpMethodDesc( PTR_MethodDesc md, PTR_Module module )
             {
                 PTR_DictionaryLayout layout(wrapped->IsSharedByGenericMethodInstantiations()
                                             ? dac_cast<TADDR>(wrapped->GetDictLayoutRaw()) : NULL );
-                dictSize = DictionaryLayout::GetDictionarySizeFromLayout(imd->GetNumGenericMethodArgs(), 
+                dictSize = DictionaryLayout::GetFirstDictionaryBucketSize(imd->GetNumGenericMethodArgs(),
                                                                           layout);
             }
         }

src/coreclr/src/debug/daccess/nidump.cpp

@@ -217,11 +217,11 @@ TODO: Talk about initializing strutures before use
 #endif
 #endif
 
-SELECTANY const GUID JITEEVersionIdentifier = { /* b2e40020-6125-41e4-a0fc-821127ec192a */
-    0xb2e40020,
-    0x6125,
-    0x41e4,
-    {0xa0, 0xfc, 0x82, 0x11, 0x27, 0xec, 0x19, 0x2a}
+SELECTANY const GUID JITEEVersionIdentifier = { /* 9C412381-94A6-4F35-B2B6-60AFB2495B72 */
+    0x9c412381,
+    0x94a6,
+    0x4f35,
+    { 0xb2, 0xb6, 0x60, 0xaf, 0xb2, 0x49, 0x5b, 0x72 }
 };
 
 //////////////////////////////////////////////////////////////////////////////////////////////////////////
@@ -1275,7 +1275,6 @@ struct CORINFO_LOOKUP_KIND
 //
 #define CORINFO_MAXINDIRECTIONS 4
 #define CORINFO_USEHELPER ((WORD) 0xffff)
-#define CORINFO_NO_SIZE_CHECK ((WORD) 0xffff)
 
 struct CORINFO_RUNTIME_LOOKUP
 {
@@ -1298,7 +1297,6 @@ struct CORINFO_RUNTIME_LOOKUP
     // If set, test the lowest bit and dereference if set (see code:FixupPointer)
     bool                    testForFixup;
 
-    WORD                    sizeOffset;
     SIZE_T                  offsets[CORINFO_MAXINDIRECTIONS];
 
     // If set, first offset is indirect.

src/coreclr/src/inc/corinfo.h

@@ -2082,12 +2082,14 @@ GenTree* Compiler::impRuntimeLookupToTree(CORINFO_RESOLVED_TOKEN* pResolvedToken
 
         if (pRuntimeLookup->offsets[i] != 0)
         {
-            // The last indirection could be subject to a size check (dynamic dictionary expansion)
-            if (i == pRuntimeLookup->indirections - 1 && pRuntimeLookup->sizeOffset != CORINFO_NO_SIZE_CHECK)
+// The last indirection could be subject to a size check (dynamic dictionary expansion feature)
+#if 0  // Uncomment that block when you add sizeOffset field to pRuntimeLookup.
+            if (i == pRuntimeLookup->indirections - 1 && pRuntimeLookup->sizeOffset != 0xFFFF)
             {
                 lastIndOfTree = impCloneExpr(slotPtrTree, &slotPtrTree, NO_CLASS_HANDLE, (unsigned)CHECK_SPILL_ALL,
                                              nullptr DEBUGARG("impRuntimeLookup indirectOffset"));
             }
+#endif // 0
 
             slotPtrTree =
                 gtNewOperNode(GT_ADD, TYP_I_IMPL, slotPtrTree, gtNewIconNode(pRuntimeLookup->offsets[i], TYP_I_IMPL));
@@ -2158,10 +2160,9 @@ GenTree* Compiler::impRuntimeLookupToTree(CORINFO_RESOLVED_TOKEN* pResolvedToken
 
     GenTree* result = nullptr;
 
-    if (pRuntimeLookup->sizeOffset != CORINFO_NO_SIZE_CHECK)
+#if 0  // Uncomment that block when you add sizeOffset field to pRuntimeLookup.
+    if (pRuntimeLookup->sizeOffset != 0xFFFF) // dynamic dictionary expansion feature
     {
-        // Dynamic dictionary expansion support
-
         assert((lastIndOfTree != nullptr) && (pRuntimeLookup->indirections > 0));
 
         // sizeValue = dictionary[pRuntimeLookup->sizeOffset]
@@ -2185,6 +2186,7 @@ GenTree* Compiler::impRuntimeLookupToTree(CORINFO_RESOLVED_TOKEN* pResolvedToken
         addExpRuntimeLookupCandidate(helperCall);
     }
     else
+#endif // 0
     {
         GenTreeColon* colonNullCheck = new (this, GT_COLON) GenTreeColon(TYP_I_IMPL, handleForResult, helperCall);
         result                       = gtNewQmarkNode(TYP_I_IMPL, nullCheck, colonNullCheck);