[turbofan] Run load elimination prior to escape analysis.

Once the escape analysis ran, it'll be harder to eliminate a bunch of
checks (for example map checks, which would currently block escape
analysis, but that's about to be fixed). Also the escape analysis will
have a lot less stress after the load elimination, which takes care of
redundant loads and checks already.

R=mstarzinger@chromium.org
BUG=v8:5448

Review-Url: https://codereview.chromium.org/2427533002
Cr-Commit-Position: refs/heads/master@{#40351}

src/compiler/pipeline.cc

@@ -1569,14 +1569,16 @@ bool PipelineImpl::CreateGraph() {
       RunPrintAndVerify("Loop peeled");
     }
 
-    if (FLAG_turbo_escape) {
-      Run<EscapeAnalysisPhase>();
-      RunPrintAndVerify("Escape Analysed");
-    }
+    if (!info()->shared_info()->asm_function()) {
+      if (FLAG_turbo_load_elimination) {
+        Run<LoadEliminationPhase>();
+        RunPrintAndVerify("Load eliminated");
+      }
 
-    if (!info()->shared_info()->asm_function() && FLAG_turbo_load_elimination) {
-      Run<LoadEliminationPhase>();
-      RunPrintAndVerify("Load eliminated");
+      if (FLAG_turbo_escape) {
+        Run<EscapeAnalysisPhase>();
+        RunPrintAndVerify("Escape Analysed");
+      }
     }
   }