Added JS Inlined code gen and simplified JVM Inlined BCode gen

Author: Tetchki

compiler/src/dotty/tools/backend/jvm/BCodeBodyBuilder.scala

@@ -480,11 +480,7 @@ trait BCodeBodyBuilder extends BCodeSkelBuilder {
           generatedType = genTypeApply(t)
 
         case inlined @ Inlined(call, bindings, expansion) => 
-          if(bindings.isEmpty)
-            genLoadTo(expansion, expectedType, dest)
-          else
-            genInlinedTo(inlined, expectedType, dest)
-          generatedDest = dest
+          genLoadTo(Block(bindings, expansion), expectedType, dest)
 
         case _ => abort(s"Unexpected tree in genLoad: $tree/${tree.getClass} at: ${tree.span}")
       }
@@ -1097,17 +1093,6 @@ trait BCodeBodyBuilder extends BCodeSkelBuilder {
       varsInScope = savedScope
     }
 
-    def genInlinedTo(tree: Inlined, expectedType: BType, dest: LoadDestination): Unit = tree match {
-      case Inlined(call, bindings, expansion) =>
-
-      val savedScope = varsInScope
-      varsInScope = Nil
-      bindings foreach genStat
-      genLoadTo(expansion, expectedType, dest)
-      emitLocalVarScopes()
-      varsInScope = savedScope
-    }
-
     /** Add entries to the `LocalVariableTable` JVM attribute for all the vars in
      *  `varsInScope`, ending at the current program point.
      */

compiler/src/dotty/tools/backend/sjs/JSCodeGen.scala

@@ -1930,6 +1930,9 @@ class JSCodeGen()(using genCtx: Context) {
       case EmptyTree =>
         js.Skip()
 
+      case Inlined(call, bindings, expansion) =>
+        genStatOrExpr(Block(bindings, expansion), isStat)
+
       case _ =>
         throw new FatalError("Unexpected tree in genExpr: " +
             tree + "/" + tree.getClass + " at: " + (tree.span: Position))