PE fix: always explode StoreRange

Author: DSouzaM

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/nodes/bytecode_dsl/PBytecodeDSLRootNode.java

@@ -3143,32 +3143,15 @@ public static PCell[] doLoadClosure(VirtualFrame frame) {
     @ConstantOperand(type = LocalRangeAccessor.class)
     public static final class StoreRange {
         @Specialization
+        @ExplodeLoop
         public static void perform(VirtualFrame frame, LocalRangeAccessor locals, Object[] values,
                         @Bind BytecodeNode bytecode) {
-            if (values.length <= EXPLODE_LOOP_THRESHOLD) {
-                doExploded(frame, locals, values, bytecode);
-            } else {
-                doRegular(frame, locals, values, bytecode);
-            }
-        }
-
-        @ExplodeLoop
-        private static void doExploded(VirtualFrame frame, LocalRangeAccessor locals, Object[] values,
-                        BytecodeNode bytecode) {
             CompilerAsserts.partialEvaluationConstant(locals.getLength());
             assert values.length == locals.getLength();
             for (int i = 0; i < locals.getLength(); i++) {
                 locals.setObject(bytecode, frame, i, values[i]);
             }
         }
-
-        private static void doRegular(VirtualFrame frame, LocalRangeAccessor locals, Object[] values,
-                        BytecodeNode bytecode) {
-            assert values.length == locals.getLength();
-            for (int i = 0; i < locals.getLength(); i++) {
-                locals.setObject(bytecode, frame, i, values[i]);
-            }
-        }
     }
 
     @Operation