Delete gtGetStructHandle and friends (#84212)

* Delete gtGetStructHandle[IfPresent]

Replaced with GenTree::GetLayout.

* Delete the canonical handle logic

* Delete handle handling from fgMakeMultiUse

* Delete gtGetStructHandleForSIMD and friends

* Delete now-unused SIMD cache entries

* Fix SIMD

* Fix fgMakeMultiUse

* Delete the IsSimdAsHWIntrinsic logic

No longer needed.

* Fix formatting

src/coreclr/jit/fginline.cpp

@@ -1658,14 +1658,12 @@ Statement* Compiler::fgInlinePrependStatements(InlineInfo* inlineInfo)
 
                     if (varTypeIsStruct(argType))
                     {
-                        structHnd = gtGetStructHandleIfPresent(argNode);
-                        noway_assert((structHnd != NO_CLASS_HANDLE) || (argType != TYP_STRUCT));
+                        structHnd = lclVarInfo[argNum].lclVerTypeInfo.GetClassHandleForValueClass();
+                        assert(structHnd != NO_CLASS_HANDLE);
                     }
 
-                    // Unsafe value cls check is not needed for
-                    // argTmpNum here since in-linee compiler instance
-                    // would have iterated over these and marked them
-                    // accordingly.
+                    // Unsafe value cls check is not needed for argTmpNum here since in-linee compiler instance
+                    // would have iterated over these and marked them accordingly.
                     impAssignTempGen(tmpNum, argNode, structHnd, CHECK_SPILL_NONE, &afterStmt, callDI, block);
 
                     // We used to refine the temp type here based on

src/coreclr/jit/flowgraph.cpp

@@ -2146,16 +2146,7 @@ GenTree* Compiler::fgCreateMonitorTree(unsigned lvaMonAcquired, unsigned lvaThis
             // ret(...) ->
             // ret(comma(comma(tmp=...,call mon_exit), tmp))
             //
-            //
-            // Before morph stage, it is possible to have a case of GT_RETURN(TYP_LONG, op1) where op1's type is
-            // TYP_STRUCT (of 8-bytes) and op1 is call node. See the big comment block in impReturnInstruction()
-            // for details for the case where info.compRetType is not the same as info.compRetNativeType.  For
-            // this reason pass compMethodInfo->args.retTypeClass which is guaranteed to be a valid class handle
-            // if the return type is a value class.  Note that fgInsertCommFormTemp() in turn uses this class handle
-            // if the type of op1 is TYP_STRUCT to perform lvaSetStruct() on the new temp that is created, which
-            // in turn passes it to VM to know the size of value type.
-            GenTree* temp = fgInsertCommaFormTemp(&retNode->AsOp()->gtOp1, info.compMethodInfo->args.retTypeClass);
-
+            GenTree* temp   = fgInsertCommaFormTemp(&retNode->AsOp()->gtOp1);
             GenTree* lclVar = retNode->AsOp()->gtOp1->AsOp()->gtOp2;
 
             // The return can't handle all of the trees that could be on the right-hand-side of an assignment,

src/coreclr/jit/gentree.h

@@ -571,9 +571,6 @@ enum GenTreeFlags : unsigned int
     GTF_MDARRLEN_NONFAULTING    = 0x20000000, // GT_MDARR_LENGTH -- An MD array length operation that cannot fault. Same as GT_IND_NONFAULTING.
 
     GTF_MDARRLOWERBOUND_NONFAULTING = 0x20000000, // GT_MDARR_LOWER_BOUND -- An MD array lower bound operation that cannot fault. Same as GT_IND_NONFAULTING.
-
-    GTF_SIMDASHW_OP             = 0x80000000, // GT_HWINTRINSIC -- Indicates that the structHandle should be gotten from gtGetStructHandleForSIMD
-                                              //                   rather than from gtGetStructHandleForHWSIMD.
 };
 
 inline constexpr GenTreeFlags operator ~(GenTreeFlags a)
@@ -6161,11 +6158,10 @@ struct GenTreeHWIntrinsic : public GenTreeJitIntrinsic
                        IntrinsicNodeBuilder&& nodeBuilder,
                        NamedIntrinsic         hwIntrinsicID,
                        CorInfoType            simdBaseJitType,
-                       unsigned               simdSize,
-                       bool                   isSimdAsHWIntrinsic)
+                       unsigned               simdSize)
         : GenTreeJitIntrinsic(GT_HWINTRINSIC, type, std::move(nodeBuilder), simdBaseJitType, simdSize)
     {
-        Initialize(hwIntrinsicID, isSimdAsHWIntrinsic);
+        Initialize(hwIntrinsicID);
     }
 
     template <typename... Operands>
@@ -6174,11 +6170,10 @@ struct GenTreeHWIntrinsic : public GenTreeJitIntrinsic
                        NamedIntrinsic hwIntrinsicID,
                        CorInfoType    simdBaseJitType,
                        unsigned       simdSize,
-                       bool           isSimdAsHWIntrinsic,
                        Operands... operands)
         : GenTreeJitIntrinsic(GT_HWINTRINSIC, type, allocator, simdBaseJitType, simdSize, operands...)
     {
-        Initialize(hwIntrinsicID, isSimdAsHWIntrinsic);
+        Initialize(hwIntrinsicID);
     }
 
 #if DEBUGGABLE_GENTREE
@@ -6191,11 +6186,6 @@ struct GenTreeHWIntrinsic : public GenTreeJitIntrinsic
     bool OperIsMemoryStore(GenTree** pAddr = nullptr) const;
     bool OperIsMemoryLoadOrStore() const;
 
-    bool IsSimdAsHWIntrinsic() const
-    {
-        return (gtFlags & GTF_SIMDASHW_OP) != 0;
-    }
-
     unsigned GetResultOpNumForFMA(GenTree* use, GenTree* op1, GenTree* op2, GenTree* op3);
 
     ClassLayout* GetLayout(Compiler* compiler) const;
@@ -6289,7 +6279,7 @@ struct GenTreeHWIntrinsic : public GenTreeJitIntrinsic
 private:
     void SetHWIntrinsicId(NamedIntrinsic intrinsicId);
 
-    void Initialize(NamedIntrinsic intrinsicId, bool isSimdAsHWIntrinsic)
+    void Initialize(NamedIntrinsic intrinsicId)
     {
         SetHWIntrinsicId(intrinsicId);
 
@@ -6305,11 +6295,6 @@ struct GenTreeHWIntrinsic : public GenTreeJitIntrinsic
                 gtFlags |= GTF_ASG;
             }
         }
-
-        if (isSimdAsHWIntrinsic)
-        {
-            gtFlags |= GTF_SIMDASHW_OP;
-        }
     }
 };
 #endif // FEATURE_HW_INTRINSICS