Issue #1624 - Make ion inlining optimizations a pref.

This also adds it to JS_SetGlobalJitCompilerOption()

dom/base/nsJSUtils.cpp

@@ -299,10 +299,11 @@ nsJSUtils::CompileModule(JSContext* aCx,
 
   NS_ENSURE_TRUE(xpc::Scriptability::Get(aEvaluationGlobal).Allowed(), NS_OK);
 
-  if (!JS::CompileModule(aCx, aCompileOptions, aSrcBuf, aModule)) {
+  bool compileResult = JS::CompileModule(aCx, aCompileOptions, aSrcBuf, aModule);
+ 
+  if (!compileResult) {
     return NS_ERROR_FAILURE;
   }
-
   return NS_OK;
 }
 

js/src/jit/JitOptions.cpp

@@ -96,7 +96,7 @@ DefaultJitOptions::DefaultJitOptions()
     SET_DEFAULT(disableGvn, false);
 
     // Toggles whether inlining is globally disabled.
-    SET_DEFAULT(disableInlining, true);
+    SET_DEFAULT(disableInlining, false);
 
     // Toggles whether loop invariant code motion is globally disabled.
     SET_DEFAULT(disableLicm, false);

js/src/jsapi.cpp

@@ -6607,6 +6607,9 @@ JS_SetGlobalJitCompilerOption(JSContext* cx, JSJitCompilerOption opt, uint32_t v
       case JSJITCOMPILER_ION_INTERRUPT_WITHOUT_SIGNAL:
         jit::JitOptions.ionInterruptWithoutSignals = !!value;
         break;
+      case JSJITCOMPILER_ION_INLINING:
+        jit::JitOptions.disableInlining = !value;
+        break;
       default:
         break;
     }

js/src/jsapi.h

@@ -5905,6 +5905,7 @@ JS_SetOffthreadIonCompilationEnabled(JSContext* cx, bool enabled);
     Register(ION_GVN_ENABLE, "ion.gvn.enable")                              \
     Register(ION_FORCE_IC, "ion.forceinlineCaches")                         \
     Register(ION_ENABLE, "ion.enable")                                      \
+    Register(ION_INLINING, "ion.inlining")                                  \
     Register(ION_INTERRUPT_WITHOUT_SIGNAL, "ion.interrupt-without-signals") \
     Register(ION_CHECK_RANGE_ANALYSIS, "ion.check-range-analysis")          \
     Register(BASELINE_ENABLE, "baseline.enable")                            \

js/xpconnect/src/XPCJSContext.cpp

@@ -1,4 +1,5 @@
 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* vim: set ts=8 sts=4 et sw=4 tw=99: */
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
@@ -1428,6 +1429,8 @@ ReloadPrefsCallback(const char* pref, void* data)
 
     bool unboxedObjects = Preferences::GetBool(JS_OPTIONS_DOT_STR "unboxed_objects");
     
+    bool inlining = Preferences::GetBool(JS_OPTIONS_DOT_STR "ion.inlining");
+    
     sSharedMemoryEnabled = Preferences::GetBool(JS_OPTIONS_DOT_STR "shared_memory");
 
 #ifdef DEBUG
@@ -1458,6 +1461,8 @@ ReloadPrefsCallback(const char* pref, void* data)
                                   useIonEager ? 0 : -1);
     JS_SetGlobalJitCompilerOption(cx, JSJITCOMPILER_UNBOXED_OBJECTS,
                                   unboxedObjects);
+    JS_SetGlobalJitCompilerOption(cx, JSJITCOMPILER_ION_INLINING,
+                                  inlining);
 }
 
 XPCJSContext::~XPCJSContext()

modules/libpref/init/all.js

@@ -1272,6 +1272,7 @@ pref("javascript.options.strict.debug",     false);
 pref("javascript.options.unboxed_objects",  false);
 pref("javascript.options.baselinejit",      true);
 pref("javascript.options.ion",              true);
+pref("javascript.options.ion.inlining",     true);
 pref("javascript.options.asmjs",            true);
 pref("javascript.options.wasm",             true);
 // wasm jit crashes in 32bit builds because of 64bit casts so