JIT: escape analysis for object fields

src/coreclr/jit/jitconfigvalues.h

@@ -674,7 +674,8 @@ RELEASE_CONFIG_INTEGER(JitObjectStackAllocationConditionalEscape, "JitObjectStac
 CONFIG_STRING(JitObjectStackAllocationConditionalEscapeRange, "JitObjectStackAllocationConditionalEscapeRange")
 RELEASE_CONFIG_INTEGER(JitObjectStackAllocationArray, "JitObjectStackAllocationArray", 1)
 RELEASE_CONFIG_INTEGER(JitObjectStackAllocationSize, "JitObjectStackAllocationSize", 528)
-RELEASE_CONFIG_INTEGER(JitObjectStackAllocationTrackFields, "JitObjectStackAllocationTrackFields", 1)
+// 0 disable; 1 enable for local structs; 2 enable for object fields; 3 enable for both local structs and object fields
+RELEASE_CONFIG_INTEGER(JitObjectStackAllocationTrackFields, "JitObjectStackAllocationTrackFields", 3)
 CONFIG_STRING(JitObjectStackAllocationTrackFieldsRange, "JitObjectStackAllocationTrackFieldsRange")
 CONFIG_INTEGER(JitObjectStackAllocationDumpConnGraph, "JitObjectStackAllocationDumpConnGraph", 0)
 

src/coreclr/jit/layout.cpp

@@ -984,8 +984,6 @@ ClassLayoutBuilder ClassLayoutBuilder::BuildArray(Compiler* compiler, CORINFO_CL
 //
 BYTE* ClassLayoutBuilder::GetOrCreateGCPtrs()
 {
-    assert(m_size % TARGET_POINTER_SIZE == 0);
-
     if (m_gcPtrs == nullptr)
     {
         m_gcPtrs = new (m_compiler, CMK_ClassLayout) BYTE[m_size / TARGET_POINTER_SIZE]{};