[wasm] Disable node splitting for asm.js code.

R=herhut@chromium.org
BUG=chromium:903197

Change-Id: Ibc9225afe4237f221ae169de3ce6b3abb45e2708
Reviewed-on: https://chromium-review.googlesource.com/c/1328925Reviewed-by: Stephan Herhut <herhut@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57390}

src/compiler/pipeline.cc

@@ -1062,6 +1062,9 @@ PipelineWasmCompilationJob::ExecuteJobImpl() {
   PipelineData* data = &data_;
   data->BeginPhaseKind("wasm optimization");
   const bool is_asm_js = native_module_->module()->origin == wasm::kAsmJsOrigin;
+  if (FLAG_turbo_splitting && !is_asm_js) {
+    data->info()->MarkAsSplittingEnabled();
+  }
   if (FLAG_wasm_opt || is_asm_js) {
     PipelineRunScope scope(data, "wasm full optimization");
     GraphReducer graph_reducer(scope.zone(), data->graph(),

src/optimized-compilation-info.cc

@@ -79,9 +79,6 @@ void OptimizedCompilationInfo::ConfigureFlags() {
       break;
     case Code::WASM_FUNCTION:
       SetFlag(kSwitchJumpTableEnabled);
-      if (FLAG_turbo_splitting) {
-        MarkAsSplittingEnabled();
-      }
       break;
     default:
       break;