Imported & Exported ES6 Namespaces now contained properties that would have been queuedExports

src/compiler.ts

@@ -367,6 +367,8 @@ export class Compiler extends DiagnosticEmitter {
   virtualCalls: Set<Function> = new Set();
   /** Elements currently undergoing compilation. */
   pendingElements: Set<Element> = new Set();
+  /** Elements, that are module exports, already processed */
+  doneModuleExports: Set<Element> = new Set();
 
   /** Compiles a {@link Program} to a {@link Module} using the specified options. */
   static compile(program: Program): Module {
@@ -815,7 +817,11 @@ export class Compiler extends DiagnosticEmitter {
         if (!classInstance.type.isUnmanaged) {
           let module = this.module;
           let internalName = classInstance.internalName;
-          module.addGlobal(internalName, NativeType.I32, false, module.i32(classInstance.id));
+
+          if (!this.doneModuleExports.has(element)) {
+            module.addGlobal(internalName, NativeType.I32, false, module.i32(classInstance.id));
+            this.doneModuleExports.add(element);
+          }
           module.addGlobalExport(internalName, prefix + name);
         }
         break;

src/program.ts

@@ -1053,7 +1053,7 @@ export class Program extends DiagnosticEmitter {
             let localName = localIdentifier.text;
             localFile.add(
               localName,
-              foreignFile.asImportedNamespace(
+              foreignFile.asAliasNamespace(
                 localName,
                 localFile,
                 localIdentifier
@@ -2893,6 +2893,8 @@ export class File extends Element {
   exportsStar: File[] | null = null;
   /** Top-level start function of this file. */
   startFunction!: Function;
+  /** Array of `import * as X` alias namespaces of this file. */
+  aliasNamespaces: Array<Namespace> = new Array<Namespace>();
 
   /** Constructs a new file. */
   constructor(
@@ -2962,6 +2964,12 @@ export class File extends Element {
     if (!exports) this.exports = exports = new Map();
     exports.set(name, element);
     if (this.source.sourceKind == SourceKind.LIBRARY_ENTRY) this.program.ensureGlobal(name, element);
+
+    // Also, add to the namespaces that capture our exports
+    for(let i = 0; i < this.aliasNamespaces.length; i++) {
+      let ns = this.aliasNamespaces[i];
+      ns.add(name, element);
+    }
   }
 
   /** Ensures that another file is a re-export of this file. */
@@ -2987,12 +2995,20 @@ export class File extends Element {
   }
 
   /** Creates an imported namespace from this file. */
-  asImportedNamespace(name: string, parent: Element, localIdentifier: IdentifierExpression): Namespace {
+  asAliasNamespace(
+    name: string, 
+    parent: Element, 
+    localIdentifier: IdentifierExpression
+  ): Namespace {
     var declaration = this.program.makeNativeNamespaceDeclaration(name);
     declaration.name = localIdentifier;
     var ns = new Namespace(name, parent, declaration);
     ns.set(CommonFlags.SCOPED);
     this.copyExportsToNamespace(ns);
+    // NOTE: Some exports are still queued, and can't yet be added here,
+    // so we remember all the alias namespaces and add to them as well
+    // when adding an element to the file.
+    this.aliasNamespaces.push(ns);
     return ns;
   }
 

tests/compiler/exports.optimized.wat

@@ -44,6 +44,7 @@
  (export "vehicles.Car.TIRES" (global $exports/vehicles.Car.TIRES))
  (export "vehicles.Car.getNumTires" (func $exports/Car.getNumTires))
  (export "outer.inner.a" (global $exports/outer.inner.a))
+ (export "renamed_mul" (func $export/mul))
  (export "__setArgumentsLength" (func $~setArgumentsLength))
  (start $~start)
  (func $exports/add (param $0 i32) (param $1 i32) (result i32)
@@ -137,6 +138,11 @@
  (func $exports/Car#openDoors (param $0 i32)
   nop
  )
+ (func $export/mul (param $0 i32) (param $1 i32) (result i32)
+  local.get $0
+  local.get $1
+  i32.mul
+ )
  (func $~start
   i32.const 1024
   global.set $~lib/rt/stub/offset

tests/compiler/exports.ts

@@ -56,3 +56,5 @@ export namespace outer {
     export const a = 42;
   }
 }
+
+export {renamed_mul} from "./export"; 

tests/compiler/exports.untouched.wat

@@ -14,6 +14,9 @@
  (global $exports/Car.TIRES i32 (i32.const 4))
  (global $exports/vehicles.Car.TIRES i32 (i32.const 4))
  (global $exports/outer.inner.a i32 (i32.const 42))
+ (global $export/a i32 (i32.const 1))
+ (global $export/b i32 (i32.const 2))
+ (global $export/c i32 (i32.const 3))
  (global $~lib/rt/stub/startOffset (mut i32) (i32.const 0))
  (global $~lib/rt/stub/offset (mut i32) (i32.const 0))
  (global $~lib/heap/__heap_base i32 (i32.const 8))
@@ -47,6 +50,7 @@
  (export "vehicles.Car.TIRES" (global $exports/vehicles.Car.TIRES))
  (export "vehicles.Car.getNumTires" (func $exports/vehicles.Car.getNumTires))
  (export "outer.inner.a" (global $exports/outer.inner.a))
+ (export "renamed_mul" (func $export/mul))
  (export "__setArgumentsLength" (func $~setArgumentsLength))
  (start $~start)
  (func $exports/add (param $0 i32) (param $1 i32) (result i32)
@@ -260,6 +264,11 @@
  (func $exports/vehicles.Car#openDoors (param $0 i32)
   nop
  )
+ (func $export/mul (param $0 i32) (param $1 i32) (result i32)
+  local.get $0
+  local.get $1
+  i32.mul
+ )
  (func $~start
   global.get $~lib/heap/__heap_base
   i32.const 15

tests/compiler/exportstar-rereexport.optimized.wat

@@ -1,10 +1,19 @@
 (module
  (type $i32_i32_=>_i32 (func (param i32 i32) (result i32)))
  (type $none_=>_none (func))
- (memory $0 0)
+ (type $i32_i32_i32_i32_=>_none (func (param i32 i32 i32 i32)))
+ (type $none_=>_i32 (func (result i32)))
+ (import "env" "abort" (func $~lib/builtins/abort (param i32 i32 i32 i32)))
+ (memory $0 1)
+ (data (i32.const 1024) "\16\00\00\00\01\00\00\00\01\00\00\00\16\00\00\00r\00e\00e\00x\00p\00o\00r\00t\00.\00t\00s")
+ (data (i32.const 1072) "\1a\00\00\00\01\00\00\00\01\00\00\00\1a\00\00\00r\00e\00r\00e\00e\00x\00p\00o\00r\00t\00.\00t\00s")
  (global $export/a i32 (i32.const 1))
  (global $export/b i32 (i32.const 2))
  (global $export/c i32 (i32.const 3))
+ (global $~lib/rt/stub/offset (mut i32) (i32.const 0))
+ (global $reexport/car (mut i32) (i32.const 0))
+ (global $rereexport/car (mut i32) (i32.const 0))
+ (global $rereexport/exportsNamespaceCar (mut i32) (i32.const 0))
  (export "memory" (memory $0))
  (export "a" (global $export/a))
  (export "renamed_a" (global $export/a))
@@ -20,6 +29,7 @@
  (export "exportstar.renamed_c" (global $export/c))
  (export "exportstar.ns.two" (func $export-default/theDefault))
  (export "exportstar.default.two" (func $export-default/theDefault))
+ (start $~start)
  (func $export/add (param $0 i32) (param $1 i32) (result i32)
   local.get $0
   local.get $1
@@ -30,6 +40,78 @@
   local.get $1
   i32.mul
  )
+ (func $exports/Car#constructor (result i32)
+  (local $0 i32)
+  (local $1 i32)
+  (local $2 i32)
+  (local $3 i32)
+  global.get $~lib/rt/stub/offset
+  i32.const 16
+  i32.add
+  local.tee $1
+  i32.const 16
+  i32.add
+  local.tee $0
+  memory.size
+  local.tee $3
+  i32.const 16
+  i32.shl
+  local.tee $2
+  i32.gt_u
+  if
+   local.get $3
+   local.get $0
+   local.get $2
+   i32.sub
+   i32.const 65535
+   i32.add
+   i32.const -65536
+   i32.and
+   i32.const 16
+   i32.shr_u
+   local.tee $2
+   local.get $3
+   local.get $2
+   i32.gt_s
+   select
+   memory.grow
+   i32.const 0
+   i32.lt_s
+   if
+    local.get $2
+    memory.grow
+    i32.const 0
+    i32.lt_s
+    if
+     unreachable
+    end
+   end
+  end
+  local.get $0
+  global.set $~lib/rt/stub/offset
+  local.get $1
+  i32.const 16
+  i32.sub
+  local.tee $0
+  i32.const 16
+  i32.store
+  local.get $0
+  i32.const 1
+  i32.store offset=4
+  local.get $0
+  i32.const 3
+  i32.store offset=8
+  local.get $0
+  i32.const 4
+  i32.store offset=12
+  local.get $1
+  i32.const 2
+  i32.store
+  local.get $1
+  i32.const 2
+  i32.store
+  local.get $1
+ )
  (func $export-default/theDefault
   nop
  )
@@ -38,4 +120,50 @@
   local.get $1
   i32.sub
  )
+ (func $~start
+  i32.const 1120
+  global.set $~lib/rt/stub/offset
+  call $exports/Car#constructor
+  global.set $reexport/car
+  global.get $reexport/car
+  i32.load
+  i32.const 2
+  i32.ne
+  if
+   i32.const 0
+   i32.const 1040
+   i32.const 40
+   i32.const 1
+   call $~lib/builtins/abort
+   unreachable
+  end
+  call $exports/Car#constructor
+  global.set $rereexport/car
+  global.get $rereexport/car
+  i32.load
+  i32.const 2
+  i32.ne
+  if
+   i32.const 0
+   i32.const 1088
+   i32.const 18
+   i32.const 1
+   call $~lib/builtins/abort
+   unreachable
+  end
+  call $exports/Car#constructor
+  global.set $rereexport/exportsNamespaceCar
+  global.get $rereexport/exportsNamespaceCar
+  i32.load
+  i32.const 2
+  i32.ne
+  if
+   i32.const 0
+   i32.const 1088
+   i32.const 24
+   i32.const 1
+   call $~lib/builtins/abort
+   unreachable
+  end
+ )
 )