From 32d13a1648a64fe26be66de026bffca8c1afa88f Mon Sep 17 00:00:00 2001
From: wolfbeast <mcwerewolf@wolfbeast.com>
Date: Thu, 20 Jun 2019 12:56:32 +0200
Subject: Call a more generic function when inlining array natives.

This simplifies the code a bit because
ElementAccessHasExtraIndexedProperty checks for length-overflow
(directly) and sparse-indexes (through TypeCanHaveExtraIndexedProperties)
so the callers don't have to do that anymore.
---
 js/src/jit/MCallOptimize.cpp | 21 +++++----------------
 js/src/jit/MIR.cpp           |  9 ---------
 js/src/jit/MIR.h             |  1 -
 3 files changed, 5 insertions(+), 26 deletions(-)

diff --git a/js/src/jit/MCallOptimize.cpp b/js/src/jit/MCallOptimize.cpp
index 0d5779cee..fed5aefe5 100644
--- a/js/src/jit/MCallOptimize.cpp
+++ b/js/src/jit/MCallOptimize.cpp
@@ -621,7 +621,8 @@ IonBuilder::inlineArrayPopShift(CallInfo& callInfo, MArrayPopShift::Mode mode)
         return InliningStatus_NotInlined;
     }
 
-    if (ArrayPrototypeHasIndexedProperty(this, script())) {
+    // Watch out for extra indexed properties on the object or its prototype.
+    if (ElementAccessHasExtraIndexedProperty(this, obj)) {
         trackOptimizationOutcome(TrackedOutcome::ProtoIndexedProps);
         return InliningStatus_NotInlined;
     }
@@ -748,14 +749,8 @@ IonBuilder::inlineArrayPush(CallInfo& callInfo)
     const Class* clasp = thisTypes->getKnownClass(constraints());
     if (clasp != &ArrayObject::class_)
         return InliningStatus_NotInlined;
-    if (thisTypes->hasObjectFlags(constraints(), OBJECT_FLAG_SPARSE_INDEXES |
-                                  OBJECT_FLAG_LENGTH_OVERFLOW))
-    {
-        trackOptimizationOutcome(TrackedOutcome::ArrayBadFlags);
-        return InliningStatus_NotInlined;
-    }
 
-    if (ArrayPrototypeHasIndexedProperty(this, script())) {
+    if (ElementAccessHasExtraIndexedProperty(this, obj)) {
         trackOptimizationOutcome(TrackedOutcome::ProtoIndexedProps);
         return InliningStatus_NotInlined;
     }
@@ -825,15 +820,9 @@ IonBuilder::inlineArraySlice(CallInfo& callInfo)
     const Class* clasp = thisTypes->getKnownClass(constraints());
     if (clasp != &ArrayObject::class_)
         return InliningStatus_NotInlined;
-    if (thisTypes->hasObjectFlags(constraints(), OBJECT_FLAG_SPARSE_INDEXES |
-                                  OBJECT_FLAG_LENGTH_OVERFLOW))
-    {
-        trackOptimizationOutcome(TrackedOutcome::ArrayBadFlags);
-        return InliningStatus_NotInlined;
-    }
 
-    // Watch out for indexed properties on the prototype.
-    if (ArrayPrototypeHasIndexedProperty(this, script())) {
+    // Watch out for indexed properties on the object or its prototype.
+    if (ElementAccessHasExtraIndexedProperty(this, obj)) {
         trackOptimizationOutcome(TrackedOutcome::ProtoIndexedProps);
         return InliningStatus_NotInlined;
     }
diff --git a/js/src/jit/MIR.cpp b/js/src/jit/MIR.cpp
index 6aa46be4b..190b40bb2 100644
--- a/js/src/jit/MIR.cpp
+++ b/js/src/jit/MIR.cpp
@@ -6221,15 +6221,6 @@ PrototypeHasIndexedProperty(IonBuilder* builder, JSObject* obj)
     return false;
 }
 
-// Whether Array.prototype, or an object on its proto chain, has an indexed property.
-bool
-jit::ArrayPrototypeHasIndexedProperty(IonBuilder* builder, JSScript* script)
-{
-    if (JSObject* proto = script->global().maybeGetArrayPrototype())
-        return PrototypeHasIndexedProperty(builder, proto);
-    return true;
-}
-
 // Whether obj or any of its prototypes have an indexed property.
 bool
 jit::TypeCanHaveExtraIndexedProperties(IonBuilder* builder, TemporaryTypeSet* types)
diff --git a/js/src/jit/MIR.h b/js/src/jit/MIR.h
index 4bedfb268..6526e0931 100644
--- a/js/src/jit/MIR.h
+++ b/js/src/jit/MIR.h
@@ -14054,7 +14054,6 @@ bool PropertyWriteNeedsTypeBarrier(TempAllocator& alloc, CompilerConstraintList*
                                    MBasicBlock* current, MDefinition** pobj,
                                    PropertyName* name, MDefinition** pvalue,
                                    bool canModify, MIRType implicitType = MIRType::None);
-bool ArrayPrototypeHasIndexedProperty(IonBuilder* builder, JSScript* script);
 bool TypeCanHaveExtraIndexedProperties(IonBuilder* builder, TemporaryTypeSet* types);
 
 inline MIRType
-- 
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