mirror of
https://github.com/roytam1/basilisk55.git
synced 2026-05-26 15:02:46 +00:00
84 lines
2.4 KiB
C++
84 lines
2.4 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "frontend/BytecodeControlStructures.h"
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#include "frontend/BytecodeEmitter.h"
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#include "frontend/EmitterScope.h"
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using namespace js;
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using namespace js::frontend;
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NestableControl::NestableControl(BytecodeEmitter* bce, StatementKind kind)
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: Nestable<NestableControl>(&bce->innermostNestableControl),
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kind_(kind),
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emitterScope_(bce->innermostEmitterScopeNoCheck())
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{}
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BreakableControl::BreakableControl(BytecodeEmitter* bce, StatementKind kind)
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: NestableControl(bce, kind)
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{
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MOZ_ASSERT(is<BreakableControl>());
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}
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bool
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BreakableControl::patchBreaks(BytecodeEmitter* bce)
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{
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return bce->emitJumpTargetAndPatch(breaks);
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}
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LabelControl::LabelControl(BytecodeEmitter* bce, JSAtom* label, ptrdiff_t startOffset)
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: BreakableControl(bce, StatementKind::Label),
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label_(bce->cx, label),
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startOffset_(startOffset)
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{}
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LoopControl::LoopControl(BytecodeEmitter* bce, StatementKind loopKind)
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: BreakableControl(bce, loopKind),
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tdzCache_(bce),
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continueTarget({ -1 })
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{
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MOZ_ASSERT(is<LoopControl>());
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LoopControl* enclosingLoop = findNearest<LoopControl>(enclosing());
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stackDepth_ = bce->stackDepth;
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loopDepth_ = enclosingLoop ? enclosingLoop->loopDepth_ + 1 : 1;
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int loopSlots;
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if (loopKind == StatementKind::Spread || loopKind == StatementKind::ForOfLoop)
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loopSlots = 3;
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else if (loopKind == StatementKind::ForInLoop)
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loopSlots = 2;
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else
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loopSlots = 0;
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MOZ_ASSERT(loopSlots <= stackDepth_);
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if (enclosingLoop) {
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canIonOsr_ = (enclosingLoop->canIonOsr_ &&
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stackDepth_ == enclosingLoop->stackDepth_ + loopSlots);
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} else {
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canIonOsr_ = stackDepth_ == loopSlots;
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}
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}
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bool
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LoopControl::patchBreaksAndContinues(BytecodeEmitter* bce)
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{
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MOZ_ASSERT(continueTarget.offset != -1);
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if (!patchBreaks(bce))
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return false;
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bce->patchJumpsToTarget(continues, continueTarget);
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return true;
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}
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TryFinallyControl::TryFinallyControl(BytecodeEmitter* bce, StatementKind kind)
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: NestableControl(bce, kind),
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emittingSubroutine_(false)
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{
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MOZ_ASSERT(is<TryFinallyControl>());
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}
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