Add specialized allocation helpers (dotnet/coreclr#21561)

This is to support dotnet/corertdotnet/coreclr#6688. They don't exist in CoreCLR (yet).

Commit migrated from https://github.com/dotnet/coreclr/commit/d4a1ed808feba26664d09e81e85336e049d30aa1

src/coreclr/src/inc/corinfo.h

@@ -213,11 +213,11 @@ TODO: Talk about initializing strutures before use
     #define SELECTANY extern __declspec(selectany)
 #endif
 
-SELECTANY const GUID JITEEVersionIdentifier = { /* FF09DB9F-26A8-4A0B-AF2C-78E32A516FE1 */
-    0xff09db9f,
-    0x26a8,
-    0x4a0b,
-    {0xaf, 0x2c, 0x78, 0xe3, 0x2a, 0x51, 0x6f, 0xe1}
+SELECTANY const GUID JITEEVersionIdentifier = { /* {0BA24443-F3E0-453E-BE58-039CC4510F39} */
+    0xba24443,
+    0xf3e0,
+    0x453e,
+    {0xbe, 0x58, 0x3, 0x9c, 0xc4, 0x51, 0xf, 0x39}
 };
 
 //////////////////////////////////////////////////////////////////////////////////////////////////////////
@@ -396,7 +396,10 @@ enum CorInfoHelpFunc
     CORINFO_HELP_NEW_CROSSCONTEXT,  // cross context new object
     CORINFO_HELP_NEWFAST,
     CORINFO_HELP_NEWSFAST,          // allocator for small, non-finalizer, non-array object
+    CORINFO_HELP_NEWSFAST_FINALIZE, // allocator for small, finalizable, non-array object
     CORINFO_HELP_NEWSFAST_ALIGN8,   // allocator for small, non-finalizer, non-array object, 8 byte aligned
+    CORINFO_HELP_NEWSFAST_ALIGN8_VC,// allocator for small, value class, 8 byte aligned
+    CORINFO_HELP_NEWSFAST_ALIGN8_FINALIZE, // allocator for small, finalizable, non-array object, 8 byte aligned
     CORINFO_HELP_NEW_MDARR,         // multi-dim array helper (with or without lower bounds - dimensions passed in as vararg)
     CORINFO_HELP_NEW_MDARR_NONVARARG,// multi-dim array helper (with or without lower bounds - dimensions passed in as unmanaged array)
     CORINFO_HELP_NEWARR_1_DIRECT,   // helper for any one dimensional array creation

src/coreclr/src/inc/jithelpers.h

@@ -73,7 +73,10 @@
     JITHELPER(CORINFO_HELP_NEW_CROSSCONTEXT,            NULL,       CORINFO_HELP_SIG_CANNOT_USE_ALIGN_STUB)
     JITHELPER(CORINFO_HELP_NEWFAST,                     JIT_New,    CORINFO_HELP_SIG_REG_ONLY)
     DYNAMICJITHELPER(CORINFO_HELP_NEWSFAST,             JIT_New,    CORINFO_HELP_SIG_REG_ONLY)
+    JITHELPER(CORINFO_HELP_NEWSFAST_FINALIZE,           NULL,       CORINFO_HELP_SIG_REG_ONLY)
     DYNAMICJITHELPER(CORINFO_HELP_NEWSFAST_ALIGN8,      JIT_New,    CORINFO_HELP_SIG_REG_ONLY)
+    JITHELPER(CORINFO_HELP_NEWSFAST_ALIGN8_VC,          NULL,       CORINFO_HELP_SIG_REG_ONLY)
+    JITHELPER(CORINFO_HELP_NEWSFAST_ALIGN8_FINALIZE,    NULL,       CORINFO_HELP_SIG_REG_ONLY)
     JITHELPER(CORINFO_HELP_NEW_MDARR,                   JIT_NewMDArr,CORINFO_HELP_SIG_8_VA)
     JITHELPER(CORINFO_HELP_NEW_MDARR_NONVARARG,         JIT_NewMDArrNonVarArg,CORINFO_HELP_SIG_4_STACK)
     JITHELPER(CORINFO_HELP_NEWARR_1_DIRECT,             JIT_NewArr1,CORINFO_HELP_SIG_REG_ONLY)

src/coreclr/src/jit/earlyprop.cpp

@@ -115,7 +115,10 @@ GenTree* Compiler::getObjectHandleNodeFromAllocation(GenTree* tree)
         {
             if (call->gtCallMethHnd == eeFindHelper(CORINFO_HELP_NEWFAST) ||
                 call->gtCallMethHnd == eeFindHelper(CORINFO_HELP_NEWSFAST) ||
+                call->gtCallMethHnd == eeFindHelper(CORINFO_HELP_NEWSFAST_FINALIZE) ||
                 call->gtCallMethHnd == eeFindHelper(CORINFO_HELP_NEWSFAST_ALIGN8) ||
+                call->gtCallMethHnd == eeFindHelper(CORINFO_HELP_NEWSFAST_ALIGN8_VC) ||
+                call->gtCallMethHnd == eeFindHelper(CORINFO_HELP_NEWSFAST_ALIGN8_FINALIZE) ||
                 call->gtCallMethHnd == eeFindHelper(CORINFO_HELP_NEWARR_1_DIRECT) ||
                 call->gtCallMethHnd == eeFindHelper(CORINFO_HELP_NEWARR_1_R2R_DIRECT) ||
                 call->gtCallMethHnd == eeFindHelper(CORINFO_HELP_NEWARR_1_OBJ) ||

src/coreclr/src/jit/utils.cpp

@@ -1227,6 +1227,7 @@ void HelperCallProperties::init()
             // Heap Allocation helpers, these all never return null
             case CORINFO_HELP_NEWSFAST:
             case CORINFO_HELP_NEWSFAST_ALIGN8:
+            case CORINFO_HELP_NEWSFAST_ALIGN8_VC:
 
                 isAllocator   = true;
                 nonNullReturn = true;
@@ -1235,6 +1236,8 @@ void HelperCallProperties::init()
 
             case CORINFO_HELP_NEW_CROSSCONTEXT:
             case CORINFO_HELP_NEWFAST:
+            case CORINFO_HELP_NEWSFAST_FINALIZE:
+            case CORINFO_HELP_NEWSFAST_ALIGN8_FINALIZE:
             case CORINFO_HELP_READYTORUN_NEW:
 
                 mayFinalize   = true; // These may run a finalizer

src/coreclr/src/jit/valuenum.cpp

@@ -8934,7 +8934,10 @@ VNFunc Compiler::fgValueNumberJitHelperMethodVNFunc(CorInfoHelpFunc helpFunc)
         case CORINFO_HELP_NEW_CROSSCONTEXT:
         case CORINFO_HELP_NEWFAST:
         case CORINFO_HELP_NEWSFAST:
+        case CORINFO_HELP_NEWSFAST_FINALIZE:
         case CORINFO_HELP_NEWSFAST_ALIGN8:
+        case CORINFO_HELP_NEWSFAST_ALIGN8_VC:
+        case CORINFO_HELP_NEWSFAST_ALIGN8_FINALIZE:
             vnf = VNF_JitNew;
             break;