[wasm][bulk-memory] Adjust table.init to recent spec changes

R=binji@chromium.org

Change-Id: Idaac0f782f70f881d0a4e60e3c32671f386f0b41
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1706474
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Reviewed-by: Ben Smith <binji@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62779}

src/wasm/wasm-objects.cc

@@ -1869,6 +1869,8 @@ bool WasmInstanceObject::InitTableEntries(Isolate* isolate,
                                           uint32_t table_index,
                                           uint32_t segment_index, uint32_t dst,
                                           uint32_t src, uint32_t count) {
+  // Copying 0 elements is a no-op.
+  if (count == 0) return true;
   // Note that this implementation just calls through to module instantiation.
   // This is intentional, so that the runtime only depends on the object
   // methods, and not the module instantiation logic.

test/cctest/wasm/test-run-wasm-bulk-memory.cc

@@ -543,9 +543,9 @@ void TestTableInitOob(ExecutionTier execution_tier, int table_index) {
   r.CheckCallViaJS(0xDEADBEEF, 0, 3, 3);
   CheckTableCall(isolate, table, r, call_index, 3, 4, null, 0, 1);
 
-  // 0-count is oob.
-  r.CheckCallViaJS(0xDEADBEEF, kTableSize + 1, 0, 0);
-  r.CheckCallViaJS(0xDEADBEEF, 0, kTableSize + 1, 0);
+  // 0-count is never oob.
+  r.CheckCallViaJS(0, kTableSize + 1, 0, 0);
+  r.CheckCallViaJS(0, 0, kTableSize + 1, 0);
 
   r.CheckCallViaJS(0xDEADBEEF, 0, 0, 6);
   r.CheckCallViaJS(0xDEADBEEF, 0, 1, 5);

test/wasm-spec-tests/wasm-spec-tests.status

@@ -19,7 +19,6 @@
   'tests/proposals/bulk-memory-operations/elem': [FAIL],
   'tests/proposals/bulk-memory-operations/memory_copy': [FAIL],
   'tests/proposals/bulk-memory-operations/table_copy': [FAIL],
-  'tests/proposals/bulk-memory-operations/table_init': [FAIL],
   'tests/proposals/bulk-memory-operations/memory_init': [FAIL],
   'tests/proposals/bulk-memory-operations/memory_fill': [FAIL],
   'tests/proposals/bulk-memory-operations/bulk': [FAIL],