fix the bug

Author: Sergey Andreenko

src/jit/compiler.h

@@ -5143,11 +5143,13 @@ class Compiler
 
     bool fgIsBigOffset(size_t offset);
 
+#if defined(LEGACY_BACKEND)
     // The following are used when morphing special cases of integer div/mod operations and also by codegen
     bool fgIsSignedDivOptimizable(GenTree* divisor);
     bool fgIsUnsignedDivOptimizable(GenTree* divisor);
     bool fgIsSignedModOptimizable(GenTree* divisor);
     bool fgIsUnsignedModOptimizable(GenTree* divisor);
+#endif // LEGACY_BACKEND
 
     bool fgNeedReturnSpillTemp();
 

src/jit/compiler.hpp

@@ -3134,6 +3134,8 @@ inline bool Compiler::fgIsBigOffset(size_t offset)
     return (offset > compMaxUncheckedOffsetForNullObject);
 }
 
+#if defined(LEGACY_BACKEND)
+
 /***********************************************************************************
 *
 *  Returns true if back-end will do other than integer division which currently occurs only
@@ -3218,6 +3220,8 @@ inline bool Compiler::fgIsUnsignedModOptimizable(GenTree* divisor)
     return false;
 }
 
+#endif // LEGACY_BACKEND
+
 /*
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src/jit/morph.cpp

@@ -11834,7 +11834,11 @@ GenTree* Compiler::fgMorphSmpOp(GenTree* tree, MorphAddrContext* mac)
             }
 
 #if USE_HELPERS_FOR_INT_DIV
-            if (typ == TYP_INT && !fgIsSignedDivOptimizable(op2))
+            if (typ == TYP_INT
+#if defined(LEGACY_BACKEND)
+                && !fgIsSignedDivOptimizable(op2)
+#endif // LEGACY_BACKEND
+                    )
             {
                 helper = CORINFO_HELP_DIV;
                 goto USE_HELPER_FOR_ARITH;
@@ -11859,7 +11863,11 @@ GenTree* Compiler::fgMorphSmpOp(GenTree* tree, MorphAddrContext* mac)
                 goto USE_HELPER_FOR_ARITH;
             }
 #if USE_HELPERS_FOR_INT_DIV
-            if (typ == TYP_INT && !fgIsUnsignedDivOptimizable(op2))
+            if (typ == TYP_INT
+#if defined(LEGACY_BACKEND)
+                && !fgIsUnsignedDivOptimizable(op2)
+#endif // LEGACY_BACKEND
+                    )
             {
                 helper = CORINFO_HELP_UDIV;
                 goto USE_HELPER_FOR_ARITH;
@@ -11974,12 +11982,20 @@ GenTree* Compiler::fgMorphSmpOp(GenTree* tree, MorphAddrContext* mac)
 #if USE_HELPERS_FOR_INT_DIV
             if (typ == TYP_INT)
             {
-                if (oper == GT_UMOD && !fgIsUnsignedModOptimizable(op2))
+                if (oper == GT_UMOD
+#if defined(LEGACY_BACKEND)
+                    && !fgIsUnsignedModOptimizable(op2)
+#endif // LEGACY_BACKEND
+                        )
                 {
                     helper = CORINFO_HELP_UMOD;
                     goto USE_HELPER_FOR_ARITH;
                 }
-                else if (oper == GT_MOD && !fgIsSignedModOptimizable(op2))
+                else if (oper == GT_MOD
+#if defined(LEGACY_BACKEND)
+                         && !fgIsSignedModOptimizable(op2)
+#endif // LEGACY_BACKEND
+                             )
                 {
                     helper = CORINFO_HELP_MOD;
                     goto USE_HELPER_FOR_ARITH;