[turbofan][wasm] Remove late optimization step

A late optimization step is only needed if Allocate operators get
expanded in MemoryOptimization, which is not the case for Webassembly.

Bug: v8:11510
Change-Id: I0e1af9922704d6a51f1257861ecc1e8a8faccc72
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2780295
Commit-Queue: Manos Koukoutos <manoskouk@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#73606}

src/compiler/pipeline.cc

@@ -3203,34 +3203,27 @@ void Pipeline::GenerateCodeForWasmFunction(
 
   pipeline.RunPrintAndVerify("V8.WasmMachineCode", true);
 
+  data.BeginPhaseKind("V8.WasmOptimization");
   if (FLAG_wasm_loop_unrolling) {
     pipeline.Run<WasmLoopUnrollingPhase>(loop_info);
-    pipeline.RunPrintAndVerify("V8.WasmLoopUnrolling", true);
+    pipeline.RunPrintAndVerify(WasmLoopUnrollingPhase::phase_name(), true);
   }
   const bool is_asm_js = is_asmjs_module(module);
 
   if (FLAG_wasm_opt || is_asm_js) {
     pipeline.Run<CsaEarlyOptimizationPhase>(is_asm_js);
     pipeline.RunPrintAndVerify(CsaEarlyOptimizationPhase::phase_name(), true);
+  } else {
+    pipeline.Run<WasmBaseOptimizationPhase>();
+    pipeline.RunPrintAndVerify(WasmBaseOptimizationPhase::phase_name(), true);
   }
 
   pipeline.Run<MemoryOptimizationPhase>();
   pipeline.RunPrintAndVerify(MemoryOptimizationPhase::phase_name(), true);
 
-  data.BeginPhaseKind("V8.WasmOptimization");
   if (FLAG_turbo_splitting && !is_asm_js) {
     data.info()->set_splitting();
   }
-  if (FLAG_wasm_opt || is_asm_js) {
-    pipeline.Run<CsaOptimizationPhase>(is_asm_js);
-    pipeline.RunPrintAndVerify(CsaOptimizationPhase::phase_name(), true);
-    pipeline.Run<DecompressionOptimizationPhase>();
-    pipeline.RunPrintAndVerify(DecompressionOptimizationPhase::phase_name(),
-                               true);
-  } else {
-    pipeline.Run<WasmBaseOptimizationPhase>();
-    pipeline.RunPrintAndVerify(WasmBaseOptimizationPhase::phase_name(), true);
-  }
 
   if (data.node_origins()) {
     data.node_origins()->RemoveDecorator();