Bug 986139 - Purge caches when preserving PJS JIT code. (r=terrence)

js/src/gc/Zone.cpp

@@ -198,10 +198,12 @@ Zone::discardJitCode(FreeOp *fop)
             // parallel. Note that we mark their baseline scripts as active as
             // well to preserve them.
             if (script->hasParallelIonScript()) {
-                if (jit::ShouldPreserveParallelJITCode(runtimeFromMainThread(), script))
+                if (jit::ShouldPreserveParallelJITCode(runtimeFromMainThread(), script)) {
+                    script->parallelIonScript()->purgeCaches(this);
                     script->baselineScript()->setActive();
-                else
+                } else {
                     jit::FinishInvalidation<ParallelExecution>(fop, script);
+                }
             }
 
             /*