Do not treat `atomic.fence` as using a memory (#5603)

* Do not treat `atomic.fence` as using a memory

Update RemoveUnusedModuleElements so that it no longer keeps the memory alive
due to an `atomic.fence` instruction and update validation to allow modules to
use `atomic.fence` without a memory.

* update wasm2js tests

1 files changed, 0 insertions, 34 deletions

diff --git a/test/wasm2js/atomic_fence.2asm.js b/test/wasm2js/atomic_fence.2asm.js
index b73378815..cbad74a73 100644
--- a/test/wasm2js/atomic_fence.2asm.js
+++ b/test/wasm2js/atomic_fence.2asm.js
@@ -1,14 +1,5 @@
 
 function asmFunc(imports) {
- var buffer = new ArrayBuffer(1507328);
- var HEAP8 = new Int8Array(buffer);
- var HEAP16 = new Int16Array(buffer);
- var HEAP32 = new Int32Array(buffer);
- var HEAPU8 = new Uint8Array(buffer);
- var HEAPU16 = new Uint16Array(buffer);
- var HEAPU32 = new Uint32Array(buffer);
- var HEAPF32 = new Float32Array(buffer);
- var HEAPF64 = new Float64Array(buffer);
  var Math_imul = Math.imul;
  var Math_fround = Math.fround;
  var Math_abs = Math.abs;
@@ -23,31 +14,6 @@ function asmFunc(imports) {
   
  }
  
- function __wasm_memory_size() {
-  return buffer.byteLength / 65536 | 0;
- }
- 
- function __wasm_memory_grow(pagesToAdd) {
-  pagesToAdd = pagesToAdd | 0;
-  var oldPages = __wasm_memory_size() | 0;
-  var newPages = oldPages + pagesToAdd | 0;
-  if ((oldPages < newPages) && (newPages < 65536)) {
-   var newBuffer = new ArrayBuffer(Math_imul(newPages, 65536));
-   var newHEAP8 = new Int8Array(newBuffer);
-   newHEAP8.set(HEAP8);
-   HEAP8 = new Int8Array(newBuffer);
-   HEAP16 = new Int16Array(newBuffer);
-   HEAP32 = new Int32Array(newBuffer);
-   HEAPU8 = new Uint8Array(newBuffer);
-   HEAPU16 = new Uint16Array(newBuffer);
-   HEAPU32 = new Uint32Array(newBuffer);
-   HEAPF32 = new Float32Array(newBuffer);
-   HEAPF64 = new Float64Array(newBuffer);
-   buffer = newBuffer;
-  }
-  return oldPages;
- }
- 
  return {
   "atomic_fence": $0
  };