From dd57b9273c7c95a7cdabc94854c8dc63b0653f02 Mon Sep 17 00:00:00 2001
From: wolfbeast <mcwerewolf@wolfbeast.com>
Date: Sun, 23 Feb 2020 14:41:40 +0100
Subject: Revert #1137 - Remove unboxed arrays

- accounting for removal of watch()/unwatch()
- updated for intermediate code changes.
---
 js/src/frontend/BytecodeEmitter.cpp | 17 +++++++++--------
 js/src/frontend/BytecodeEmitter.h   |  2 +-
 2 files changed, 10 insertions(+), 9 deletions(-)

(limited to 'js/src/frontend')

diff --git a/js/src/frontend/BytecodeEmitter.cpp b/js/src/frontend/BytecodeEmitter.cpp
index f4574b248..8cd06feac 100644
--- a/js/src/frontend/BytecodeEmitter.cpp
+++ b/js/src/frontend/BytecodeEmitter.cpp
@@ -6495,8 +6495,8 @@ ParseNode::getConstantValue(ExclusiveContext* cx, AllowConstantObjects allowObje
         }
         MOZ_ASSERT(idx == count);
 
-        ArrayObject* obj = ObjectGroup::newArrayObject(cx, values.begin(), values.length(),
-                                                       newKind, arrayKind);
+        JSObject* obj = ObjectGroup::newArrayObject(cx, values.begin(), values.length(),
+                                                    newKind, arrayKind);
         if (!obj)
             return false;
 
@@ -9623,7 +9623,7 @@ BytecodeEmitter::emitCallOrNew(ParseNode* pn, ValueUsage valueUsage /* = ValueUs
                 return false;
         }
 
-        if (!emitArray(args, argc))
+        if (!emitArray(args, argc, JSOP_SPREADCALLARRAY))
             return false;
 
         if (optCodeEmitted) {
@@ -10138,11 +10138,11 @@ BytecodeEmitter::emitArrayLiteral(ParseNode* pn)
         }
     }
 
-    return emitArray(pn->pn_head, pn->pn_count);
+    return emitArray(pn->pn_head, pn->pn_count, JSOP_NEWARRAY);
 }
 
 bool
-BytecodeEmitter::emitArray(ParseNode* pn, uint32_t count)
+BytecodeEmitter::emitArray(ParseNode* pn, uint32_t count, JSOp op)
 {
 
     /*
@@ -10153,6 +10153,7 @@ BytecodeEmitter::emitArray(ParseNode* pn, uint32_t count)
      * to avoid dup'ing and popping the array as each element is added, as
      * JSOP_SETELEM/JSOP_SETPROP would do.
      */
+    MOZ_ASSERT(op == JSOP_NEWARRAY || op == JSOP_SPREADCALLARRAY);
 
     uint32_t nspread = 0;
     for (ParseNode* elt = pn; elt; elt = elt->pn_next) {
@@ -10173,7 +10174,7 @@ BytecodeEmitter::emitArray(ParseNode* pn, uint32_t count)
 
     // For arrays with spread, this is a very pessimistic allocation, the
     // minimum possible final size.
-    if (!emitUint32Operand(JSOP_NEWARRAY, count - nspread))         // ARRAY
+    if (!emitUint32Operand(op, count - nspread))                    // ARRAY
         return false;
 
     ParseNode* pn2 = pn;
@@ -11314,8 +11315,8 @@ BytecodeEmitter::setSrcNoteOffset(unsigned index, unsigned which, ptrdiff_t offs
         /* Maybe this offset was already set to a four-byte value. */
         if (!(*sn & SN_4BYTE_OFFSET_FLAG)) {
             /* Insert three dummy bytes that will be overwritten shortly. */
-            if (MOZ_UNLIKELY(notes.length() + 3 > MaxSrcNotesLength)) {
-                ReportAllocationOverflow(cx);
+            if (MOZ_UNLIKELY(notes.length() + 3 > MaxSrcNotesLength)) {
+                ReportAllocationOverflow(cx);
                 return false;
             }
             jssrcnote dummy = 0;
diff --git a/js/src/frontend/BytecodeEmitter.h b/js/src/frontend/BytecodeEmitter.h
index 8ad409c11..77f77599c 100644
--- a/js/src/frontend/BytecodeEmitter.h
+++ b/js/src/frontend/BytecodeEmitter.h
@@ -543,7 +543,7 @@ struct MOZ_STACK_CLASS BytecodeEmitter
     MOZ_MUST_USE bool emitAtomOp(ParseNode* pn, JSOp op);
 
     MOZ_MUST_USE bool emitArrayLiteral(ParseNode* pn);
-    MOZ_MUST_USE bool emitArray(ParseNode* pn, uint32_t count);
+    MOZ_MUST_USE bool emitArray(ParseNode* pn, uint32_t count, JSOp op);
     MOZ_MUST_USE bool emitArrayComp(ParseNode* pn);
 
     MOZ_MUST_USE bool emitInternedScopeOp(uint32_t index, JSOp op);
-- 
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