diff options
Diffstat (limited to 'js/src/frontend/BytecodeEmitter.cpp')
| -rw-r--r-- | js/src/frontend/BytecodeEmitter.cpp | 30 |
1 files changed, 20 insertions, 10 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)) |