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-rw-r--r--js/src/frontend/BytecodeEmitter.cpp30
-rw-r--r--js/src/frontend/BytecodeEmitter.h2
2 files changed, 21 insertions, 11 deletions
diff --git a/js/src/frontend/BytecodeEmitter.cpp b/js/src/frontend/BytecodeEmitter.cpp
index fb141e92d..2934f63a5 100644
--- a/js/src/frontend/BytecodeEmitter.cpp
+++ b/js/src/frontend/BytecodeEmitter.cpp
@@ -6676,7 +6676,17 @@ BytecodeEmitter::emitForOf(ParseNode* forOfLoop, EmitterScope* headLexicalEmitte
if (!emit1(JSOP_DUP)) // ITER ITER
return false;
- if (!emitIteratorNext(forOfHead)) // ITER RESULT
+ // Certain builtins (e.g. Array.from) are implemented in self-hosting
+ // as for-of loops.
+ bool allowSelfHostedIter = false;
+ if (emitterMode == BytecodeEmitter::SelfHosting &&
+ forHeadExpr->isKind(PNK_CALL) &&
+ forHeadExpr->pn_head->name() == cx->names().allowContentIter)
+ {
+ allowSelfHostedIter = true;
+ }
+
+ if (!emitIteratorNext(forOfHead, allowSelfHostedIter)) // ITER RESULT
return false;
if (!emit1(JSOP_DUP)) // ITER RESULT RESULT
return false;
@@ -8438,10 +8448,10 @@ BytecodeEmitter::emitSelfHostedForceInterpreter(ParseNode* pn)
}
bool
-BytecodeEmitter::emitSelfHostedAllowContentSpread(ParseNode* pn)
+BytecodeEmitter::emitSelfHostedAllowContentIter(ParseNode* pn)
{
if (pn->pn_count != 2) {
- reportError(pn, JSMSG_MORE_ARGS_NEEDED, "allowContentSpread", "1", "");
+ reportError(pn, JSMSG_MORE_ARGS_NEEDED, "allowContentIter", "1", "");
return false;
}
@@ -8467,7 +8477,7 @@ BytecodeEmitter::isRestParameter(ParseNode* pn, bool* result)
if (!pn->isKind(PNK_NAME)) {
if (emitterMode == BytecodeEmitter::SelfHosting && pn->isKind(PNK_CALL)) {
ParseNode* pn2 = pn->pn_head;
- if (pn2->getKind() == PNK_NAME && pn2->name() == cx->names().allowContentSpread)
+ if (pn2->getKind() == PNK_NAME && pn2->name() == cx->names().allowContentIter)
return isRestParameter(pn2->pn_next, result);
}
*result = false;
@@ -8575,8 +8585,8 @@ BytecodeEmitter::emitCallOrNew(ParseNode* pn)
return emitSelfHostedResumeGenerator(pn);
if (pn2->name() == cx->names().forceInterpreter)
return emitSelfHostedForceInterpreter(pn);
- if (pn2->name() == cx->names().allowContentSpread)
- return emitSelfHostedAllowContentSpread(pn);
+ if (pn2->name() == cx->names().allowContentIter)
+ return emitSelfHostedAllowContentIter(pn);
// Fall through.
}
if (!emitGetName(pn2, callop))
@@ -9231,7 +9241,7 @@ BytecodeEmitter::emitArray(ParseNode* pn, uint32_t count, JSOp op)
if (!updateSourceCoordNotes(pn2->pn_pos.begin))
return false;
- bool allowSelfHostedSpread = false;
+ bool allowSelfHostedIter = false;
if (pn2->isKind(PNK_ELISION)) {
if (!emit1(JSOP_HOLE))
return false;
@@ -9242,9 +9252,9 @@ BytecodeEmitter::emitArray(ParseNode* pn, uint32_t count, JSOp op)
if (emitterMode == BytecodeEmitter::SelfHosting &&
expr->isKind(PNK_CALL) &&
- expr->pn_head->name() == cx->names().allowContentSpread)
+ expr->pn_head->name() == cx->names().allowContentIter)
{
- allowSelfHostedSpread = true;
+ allowSelfHostedIter = true;
}
} else {
expr = pn2;
@@ -9259,7 +9269,7 @@ BytecodeEmitter::emitArray(ParseNode* pn, uint32_t count, JSOp op)
return false;
if (!emit2(JSOP_PICK, 2)) // ITER ARRAY INDEX
return false;
- if (!emitSpread(allowSelfHostedSpread)) // ARRAY INDEX
+ if (!emitSpread(allowSelfHostedIter)) // ARRAY INDEX
return false;
} else if (afterSpread) {
if (!emit1(JSOP_INITELEM_INC))
diff --git a/js/src/frontend/BytecodeEmitter.h b/js/src/frontend/BytecodeEmitter.h
index 6b39069de..156abedbe 100644
--- a/js/src/frontend/BytecodeEmitter.h
+++ b/js/src/frontend/BytecodeEmitter.h
@@ -732,7 +732,7 @@ struct MOZ_STACK_CLASS BytecodeEmitter
MOZ_MUST_USE bool emitSelfHostedCallFunction(ParseNode* pn);
MOZ_MUST_USE bool emitSelfHostedResumeGenerator(ParseNode* pn);
MOZ_MUST_USE bool emitSelfHostedForceInterpreter(ParseNode* pn);
- MOZ_MUST_USE bool emitSelfHostedAllowContentSpread(ParseNode* pn);
+ MOZ_MUST_USE bool emitSelfHostedAllowContentIter(ParseNode* pn);
MOZ_MUST_USE bool emitComprehensionFor(ParseNode* compFor);
MOZ_MUST_USE bool emitComprehensionForIn(ParseNode* pn);