3 files changed, 19 insertions, 19 deletions

diff --git a/js/src/frontend/BytecodeEmitter.cpp b/js/src/frontend/BytecodeEmitter.cpp
index b8a9bdf7e..6a6deed12 100644
--- a/js/src/frontend/BytecodeEmitter.cpp
+++ b/js/src/frontend/BytecodeEmitter.cpp
@@ -2046,7 +2046,7 @@ class ForOfLoopControl : public LoopControl
             return false;
 
         MOZ_ASSERT(numYieldsAtBeginCodeNeedingIterClose_ == UINT32_MAX);
-        numYieldsAtBeginCodeNeedingIterClose_ = bce->yieldOffsetList.numYields;
+        numYieldsAtBeginCodeNeedingIterClose_ = bce->yieldAndAwaitOffsetList.numYields;
 
         return true;
     }
@@ -2088,7 +2088,7 @@ class ForOfLoopControl : public LoopControl
         // If any yields were emitted, then this for-of loop is inside a star
         // generator and must handle the case of Generator.return. Like in
         // yield*, it is handled with a finally block.
-        uint32_t numYieldsEmitted = bce->yieldOffsetList.numYields;
+        uint32_t numYieldsEmitted = bce->yieldAndAwaitOffsetList.numYields;
         if (numYieldsEmitted > numYieldsAtBeginCodeNeedingIterClose_) {
             if (!tryCatch_->emitFinally())
                 return false;
@@ -2190,7 +2190,7 @@ BytecodeEmitter::BytecodeEmitter(BytecodeEmitter* parent,
     scopeList(cx),
     tryNoteList(cx),
     scopeNoteList(cx),
-    yieldOffsetList(cx),
+    yieldAndAwaitOffsetList(cx),
     typesetCount(0),
     hasSingletons(false),
     hasTryFinally(false),
@@ -4798,26 +4798,26 @@ BytecodeEmitter::emitYieldOp(JSOp op)
     if (op == JSOP_FINALYIELDRVAL)
         return emit1(JSOP_FINALYIELDRVAL);
 
-    MOZ_ASSERT(op == JSOP_INITIALYIELD || op == JSOP_YIELD);
+    MOZ_ASSERT(op == JSOP_INITIALYIELD || op == JSOP_YIELD || op == JSOP_AWAIT);
 
     ptrdiff_t off;
     if (!emitN(op, 3, &off))
         return false;
 
-    uint32_t yieldIndex = yieldOffsetList.length();
-    if (yieldIndex >= JS_BIT(24)) {
+    uint32_t yieldAndAwaitIndex = yieldAndAwaitOffsetList.length();
+    if (yieldAndAwaitIndex >= JS_BIT(24)) {
         reportError(nullptr, JSMSG_TOO_MANY_YIELDS);
         return false;
     }
 
     if (op == JSOP_YIELD)
-        yieldOffsetList.numYields++;
+        yieldAndAwaitOffsetList.numYields++;
     else
-        yieldOffsetList.numAwaits++;
+        yieldAndAwaitOffsetList.numAwaits++;
 
-    SET_UINT24(code(off), yieldIndex);
+    SET_UINT24(code(off), yieldAndAwaitIndex);
 
-    if (!yieldOffsetList.append(offset()))
+    if (!yieldAndAwaitOffsetList.append(offset()))
         return false;
 
     return emit1(JSOP_DEBUGAFTERYIELD);
@@ -8530,7 +8530,7 @@ BytecodeEmitter::emitYield(ParseNode* pn)
 {
     MOZ_ASSERT(sc->isFunctionBox());
 
-    if (pn->getOp() == JSOP_YIELD) {
+    if (pn->getOp() == JSOP_YIELD || pn->getOp() == JSOP_AWAIT) {
         bool needsIteratorResult = sc->asFunctionBox()->needsIteratorResult();
         if (needsIteratorResult) {
             if (!emitPrepareIteratorResult())
@@ -11293,7 +11293,7 @@ CGScopeNoteList::finish(ScopeNoteArray* array, uint32_t prologueLength)
 }
 
 void
-CGYieldOffsetList::finish(YieldOffsetArray& array, uint32_t prologueLength)
+CGYieldAndAwaitOffsetList::finish(YieldAndAwaitOffsetArray& array, uint32_t prologueLength)
 {
     MOZ_ASSERT(length() == array.length());
 
diff --git a/js/src/frontend/BytecodeEmitter.h b/js/src/frontend/BytecodeEmitter.h
index 595ee6405..7f2dddfed 100644
--- a/js/src/frontend/BytecodeEmitter.h
+++ b/js/src/frontend/BytecodeEmitter.h
@@ -98,15 +98,15 @@ struct CGScopeNoteList {
     void finish(ScopeNoteArray* array, uint32_t prologueLength);
 };
 
-struct CGYieldOffsetList {
+struct CGYieldAndAwaitOffsetList {
     Vector<uint32_t> list;
     uint32_t numYields;
     uint32_t numAwaits;
-    explicit CGYieldOffsetList(ExclusiveContext* cx) : list(cx), numYields(0), numAwaits(0) {}
+    explicit CGYieldAndAwaitOffsetList(ExclusiveContext* cx) : list(cx), numYields(0), numAwaits(0) {}
 
     MOZ_MUST_USE bool append(uint32_t offset) { return list.append(offset); }
     size_t length() const { return list.length(); }
-    void finish(YieldOffsetArray& array, uint32_t prologueLength);
+    void finish(YieldAndAwaitOffsetArray& array, uint32_t prologueLength);
 };
 
 static size_t MaxBytecodeLength = INT32_MAX;
@@ -237,10 +237,10 @@ struct MOZ_STACK_CLASS BytecodeEmitter
     CGScopeNoteList  scopeNoteList;  /* list of emitted block scope notes */
 
     /*
-     * For each yield op, map the yield index (stored as bytecode operand) to
-     * the offset of the next op.
+     * For each yield or await op, map the yield and await index (stored as
+     * bytecode operand) to the offset of the next op.
      */
-    CGYieldOffsetList yieldOffsetList;
+    CGYieldAndAwaitOffsetList yieldAndAwaitOffsetList;
 
     uint16_t        typesetCount;   /* Number of JOF_TYPESET opcodes generated */
 
diff --git a/js/src/frontend/FullParseHandler.h b/js/src/frontend/FullParseHandler.h
index 2d7f57e1e..6ab93f3f9 100644
--- a/js/src/frontend/FullParseHandler.h
+++ b/js/src/frontend/FullParseHandler.h
@@ -453,7 +453,7 @@ class FullParseHandler
 
     ParseNode* newAwaitExpression(uint32_t begin, ParseNode* value, ParseNode* gen) {
         TokenPos pos(begin, value ? value->pn_pos.end : begin + 1);
-        return new_<BinaryNode>(PNK_AWAIT, JSOP_YIELD, pos, value, gen);
+        return new_<BinaryNode>(PNK_AWAIT, JSOP_AWAIT, pos, value, gen);
     }
 
     // Statements