webkitgtk-2.4.11webkitgtk-2.4.11

1 files changed, 0 insertions, 369 deletions

diff --git a/Source/JavaScriptCore/jit/CallFrameShuffler64.cpp b/Source/JavaScriptCore/jit/CallFrameShuffler64.cpp
deleted file mode 100644
index 2ef6ed111..000000000
--- a/Source/JavaScriptCore/jit/CallFrameShuffler64.cpp
+++ /dev/null
@@ -1,369 +0,0 @@
-/*
- * Copyright (C) 2015 Apple Inc. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
- * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
- * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
- */
-
-#include "config.h"
-#include "CallFrameShuffler.h"
-
-#if ENABLE(JIT) && USE(JSVALUE64)
-
-#include "CCallHelpers.h"
-#include "DataFormat.h"
-#include "JSCInlines.h"
-
-namespace JSC {
-
-DataFormat CallFrameShuffler::emitStore(
-    CachedRecovery& cachedRecovery, MacroAssembler::Address address)
-{
-    ASSERT(!cachedRecovery.recovery().isInJSStack());
-
-    switch (cachedRecovery.recovery().technique()) {
-    case InGPR:
-        m_jit.storePtr(cachedRecovery.recovery().gpr(), address);
-        return DataFormatJS;
-    case UnboxedInt32InGPR:
-        m_jit.store32(cachedRecovery.recovery().gpr(), address.withOffset(PayloadOffset));
-        return DataFormatInt32;
-    case UnboxedInt52InGPR:
-        m_jit.rshift64(MacroAssembler::TrustedImm32(JSValue::int52ShiftAmount),
-            cachedRecovery.recovery().gpr());
-        FALLTHROUGH;
-    case UnboxedStrictInt52InGPR:
-        m_jit.storePtr(cachedRecovery.recovery().gpr(), address);
-        return DataFormatStrictInt52;
-    case UnboxedBooleanInGPR:
-        m_jit.storePtr(cachedRecovery.recovery().gpr(), address);
-        return DataFormatBoolean;
-    case UnboxedCellInGPR:
-        m_jit.storePtr(cachedRecovery.recovery().gpr(), address);
-        return DataFormatCell;
-    case UnboxedDoubleInFPR:
-        m_jit.storeDouble(cachedRecovery.recovery().fpr(), address);
-        return DataFormatDouble;
-    case InFPR:
-        m_jit.storeDouble(cachedRecovery.recovery().fpr(), address);
-        return DataFormatJS;
-    case Constant:
-        m_jit.storeTrustedValue(cachedRecovery.recovery().constant(), address);
-        return DataFormatJS;
-    default:
-        RELEASE_ASSERT_NOT_REACHED();
-    }
-}
-
-void CallFrameShuffler::emitBox(CachedRecovery& cachedRecovery)
-{
-    ASSERT(canBox(cachedRecovery));
-    if (cachedRecovery.recovery().isConstant())
-        return;
-
-    if (cachedRecovery.recovery().isInGPR()) {
-        switch (cachedRecovery.recovery().dataFormat()) {
-        case DataFormatInt32:
-            if (verbose)
-                dataLog("   * Boxing ", cachedRecovery.recovery());
-            m_jit.zeroExtend32ToPtr(
-                cachedRecovery.recovery().gpr(),
-                cachedRecovery.recovery().gpr());
-            m_lockedRegisters.set(cachedRecovery.recovery().gpr());
-            if (tryAcquireTagTypeNumber())
-                m_jit.or64(m_tagTypeNumber, cachedRecovery.recovery().gpr());
-            else {
-                // We have to do this the hard way
-                m_jit.or64(MacroAssembler::TrustedImm64(TagTypeNumber),
-                    cachedRecovery.recovery().gpr());
-            }
-            m_lockedRegisters.clear(cachedRecovery.recovery().gpr());
-            cachedRecovery.setRecovery(
-                ValueRecovery::inGPR(cachedRecovery.recovery().gpr(), DataFormatJS));
-            if (verbose)
-                dataLog(" into ", cachedRecovery.recovery(), "\n");
-            return;
-        case DataFormatInt52:
-            if (verbose)
-                dataLog("   * Boxing ", cachedRecovery.recovery());
-            m_jit.rshift64(MacroAssembler::TrustedImm32(JSValue::int52ShiftAmount),
-                cachedRecovery.recovery().gpr());
-            cachedRecovery.setRecovery(
-                ValueRecovery::inGPR(cachedRecovery.recovery().gpr(), DataFormatStrictInt52));
-            if (verbose)
-                dataLog(" into ", cachedRecovery.recovery(), "\n");
-            FALLTHROUGH;
-        case DataFormatStrictInt52: {
-            if (verbose)
-                dataLog("   * Boxing ", cachedRecovery.recovery());
-            FPRReg resultFPR = getFreeFPR();
-            ASSERT(resultFPR != InvalidFPRReg);
-            m_jit.convertInt64ToDouble(cachedRecovery.recovery().gpr(), resultFPR);
-            updateRecovery(cachedRecovery, ValueRecovery::inFPR(resultFPR, DataFormatDouble));
-            if (verbose)
-                dataLog(" into ", cachedRecovery.recovery(), "\n");
-            break;
-        }
-        case DataFormatBoolean:
-            if (verbose)
-                dataLog("   * Boxing ", cachedRecovery.recovery());
-            m_jit.add32(MacroAssembler::TrustedImm32(ValueFalse),
-                cachedRecovery.recovery().gpr());
-            cachedRecovery.setRecovery(
-                ValueRecovery::inGPR(cachedRecovery.recovery().gpr(), DataFormatJS));
-            if (verbose)
-                dataLog(" into ", cachedRecovery.recovery(), "\n");
-            return;
-        default:
-            return;
-        }
-    }
-
-    if (cachedRecovery.recovery().isInFPR()) {
-        if (cachedRecovery.recovery().dataFormat() == DataFormatDouble) {
-            if (verbose)
-                dataLog("   * Boxing ", cachedRecovery.recovery());
-            GPRReg resultGPR = cachedRecovery.wantedJSValueRegs().gpr();
-            if (resultGPR == InvalidGPRReg || m_registers[resultGPR])
-                resultGPR = getFreeGPR();
-            ASSERT(resultGPR != InvalidGPRReg);
-            m_jit.purifyNaN(cachedRecovery.recovery().fpr());
-            m_jit.moveDoubleTo64(cachedRecovery.recovery().fpr(), resultGPR);
-            m_lockedRegisters.set(resultGPR);
-            if (tryAcquireTagTypeNumber())
-                m_jit.sub64(m_tagTypeNumber, resultGPR);
-            else
-                m_jit.sub64(MacroAssembler::TrustedImm64(TagTypeNumber), resultGPR);
-            m_lockedRegisters.clear(resultGPR);
-            updateRecovery(cachedRecovery, ValueRecovery::inGPR(resultGPR, DataFormatJS));
-            if (verbose)
-                dataLog(" into ", cachedRecovery.recovery(), "\n");
-            return;
-        }
-        ASSERT(cachedRecovery.recovery().dataFormat() == DataFormatJS);
-        return;
-    }
-
-    RELEASE_ASSERT_NOT_REACHED();
-}
-
-void CallFrameShuffler::emitLoad(CachedRecovery& cachedRecovery)
-{
-    if (!cachedRecovery.recovery().isInJSStack())
-        return;
-
-    if (verbose)
-        dataLog("   * Loading ", cachedRecovery.recovery(), " into ");
-
-    VirtualRegister reg = cachedRecovery.recovery().virtualRegister();
-    MacroAssembler::Address address { addressForOld(reg) };
-    bool tryFPR { true };
-    GPRReg resultGPR { cachedRecovery.wantedJSValueRegs().gpr() };
-
-    // If we want a GPR and it's available, that's better than loading
-    // into an FPR.
-    if (resultGPR != InvalidGPRReg && !m_registers[resultGPR]
-        && !m_lockedRegisters.get(resultGPR) && cachedRecovery.loadsIntoGPR())
-        tryFPR = false;
-
-    // Otherwise, we prefer loading into FPRs if possible
-    if (tryFPR && cachedRecovery.loadsIntoFPR()) {
-        FPRReg resultFPR { cachedRecovery.wantedFPR() };
-        if (resultFPR == InvalidFPRReg || m_registers[resultFPR] || m_lockedRegisters.get(resultFPR))
-            resultFPR = getFreeFPR();
-        if (resultFPR != InvalidFPRReg) {
-            m_jit.loadDouble(address, resultFPR);
-            DataFormat dataFormat = DataFormatJS;
-            // We could be transforming a DataFormatCell into a
-            // DataFormatJS here - but that's OK.
-            if (cachedRecovery.recovery().dataFormat() == DataFormatDouble)
-                dataFormat = DataFormatDouble;
-            updateRecovery(cachedRecovery,
-                ValueRecovery::inFPR(resultFPR, dataFormat));
-            if (verbose)
-                dataLog(cachedRecovery.recovery(), "\n");
-            if (reg == newAsOld(dangerFrontier()))
-                updateDangerFrontier();
-            return;
-        }
-    }
-
-    ASSERT(cachedRecovery.loadsIntoGPR());
-    if (resultGPR == InvalidGPRReg || m_registers[resultGPR] || m_lockedRegisters.get(resultGPR))
-        resultGPR = getFreeGPR();
-    ASSERT(resultGPR != InvalidGPRReg);
-    m_jit.loadPtr(address, resultGPR);
-    updateRecovery(cachedRecovery,
-        ValueRecovery::inGPR(resultGPR, cachedRecovery.recovery().dataFormat()));
-    if (verbose)
-        dataLog(cachedRecovery.recovery(), "\n");
-    if (reg == newAsOld(dangerFrontier()))
-        updateDangerFrontier();
-}
-
-bool CallFrameShuffler::canLoad(CachedRecovery& cachedRecovery)
-{
-    if (!cachedRecovery.recovery().isInJSStack())
-        return true;
-
-    ASSERT(cachedRecovery.loadsIntoFPR() || cachedRecovery.loadsIntoGPR());
-
-    if (cachedRecovery.loadsIntoFPR() && getFreeFPR() != InvalidFPRReg)
-        return true;
-
-    if (cachedRecovery.loadsIntoGPR() && getFreeGPR() != InvalidGPRReg)
-        return true;
-
-    return false;
-}
-
-void CallFrameShuffler::emitDisplace(CachedRecovery& cachedRecovery)
-{
-    Reg wantedReg;
-    if (!(wantedReg = Reg { cachedRecovery.wantedJSValueRegs().gpr() }))
-        wantedReg = Reg { cachedRecovery.wantedFPR() };
-    ASSERT(wantedReg);
-    ASSERT(!m_lockedRegisters.get(wantedReg));
-
-    if (CachedRecovery* current = m_registers[wantedReg]) {
-        if (current == &cachedRecovery) {
-            if (verbose)
-                dataLog("   + ", wantedReg, " is OK\n");
-            return;
-        }
-        // We could do a more complex thing by finding cycles
-        // etc. in that case.
-        // However, ending up in this situation will be super
-        // rare, and should actually be outright impossible for
-        // non-FTL tiers, since:
-        //  (a) All doubles have been converted into JSValues with
-        //      ValueRep nodes, so FPRs are initially free
-        //
-        //  (b) The only recoveries with wanted registers are the
-        //      callee (which always starts out in a register) and
-        //      the callee-save registers
-        //
-        //  (c) The callee-save registers are the first things we
-        //      load (after the return PC), and they are loaded as JSValues
-        //
-        //  (d) We prefer loading JSValues into FPRs if their
-        //      wanted GPR is not available
-        //
-        //  (e) If we end up spilling some registers with a
-        //      target, we won't load them again before the very
-        //      end of the algorithm
-        //
-        // Combined, this means that we will never load a recovery
-        // with a wanted GPR into any GPR other than its wanted
-        // GPR. The callee could however have been initially in
-        // one of the callee-save registers - but since the wanted
-        // GPR for the callee is always regT0, it will be the
-        // first one to be displaced, and we won't see it when
-        // handling any of the callee-save registers.
-        //
-        // Thus, the only way we could ever reach this path is in
-        // the FTL, when there is so much pressure that we
-        // absolutely need to load the callee-save registers into
-        // different GPRs initially but not enough pressure to
-        // then have to spill all of them. And even in that case,
-        // depending on the order in which B3 saves the
-        // callee-saves, we will probably still be safe. Anyway,
-        // the couple extra move instructions compared to an
-        // efficient cycle-based algorithm are not going to hurt
-        // us.
-        if (wantedReg.isFPR()) {
-            FPRReg tempFPR = getFreeFPR();
-            if (verbose)
-                dataLog("  * Moving ", wantedReg, " into ", tempFPR, "\n");
-            m_jit.moveDouble(wantedReg.fpr(), tempFPR);
-            updateRecovery(*current,
-                ValueRecovery::inFPR(tempFPR, current->recovery().dataFormat()));
-        } else {
-            GPRReg tempGPR = getFreeGPR();
-            if (verbose)
-                dataLog("  * Moving ", wantedReg.gpr(), " into ", tempGPR, "\n");
-            m_jit.move(wantedReg.gpr(), tempGPR);
-            updateRecovery(*current,
-                ValueRecovery::inGPR(tempGPR, current->recovery().dataFormat()));
-        }
-    }
-    ASSERT(!m_registers[wantedReg]);
-
-    if (cachedRecovery.recovery().isConstant()) {
-        // We only care about callee saves for wanted FPRs, and those are never constants
-        ASSERT(wantedReg.isGPR());
-        if (verbose)
-            dataLog("   * Loading ", cachedRecovery.recovery().constant(), " into ", wantedReg, "\n");
-        m_jit.moveTrustedValue(cachedRecovery.recovery().constant(), JSValueRegs { wantedReg.gpr() });
-        updateRecovery(
-            cachedRecovery,
-            ValueRecovery::inRegister(wantedReg, DataFormatJS));
-    } else if (cachedRecovery.recovery().isInGPR()) {
-        if (verbose)
-            dataLog("   * Moving ", cachedRecovery.recovery(), " into ", wantedReg, "\n");
-        if (wantedReg.isGPR())
-            m_jit.move(cachedRecovery.recovery().gpr(), wantedReg.gpr());
-        else
-            m_jit.move64ToDouble(cachedRecovery.recovery().gpr(), wantedReg.fpr());
-        RELEASE_ASSERT(cachedRecovery.recovery().dataFormat() == DataFormatJS);
-        updateRecovery(cachedRecovery,
-            ValueRecovery::inRegister(wantedReg, DataFormatJS));
-    } else {
-        ASSERT(cachedRecovery.recovery().isInFPR());
-        if (cachedRecovery.recovery().dataFormat() == DataFormatDouble) {
-            // We only care about callee saves for wanted FPRs, and those are always DataFormatJS
-            ASSERT(wantedReg.isGPR());
-            // This will automatically pick the wanted GPR
-            emitBox(cachedRecovery);
-        } else {
-            if (verbose)
-                dataLog("   * Moving ", cachedRecovery.recovery().fpr(), " into ", wantedReg, "\n");
-            if (wantedReg.isGPR())
-                m_jit.moveDoubleTo64(cachedRecovery.recovery().fpr(), wantedReg.gpr());
-            else
-                m_jit.moveDouble(cachedRecovery.recovery().fpr(), wantedReg.fpr());
-            RELEASE_ASSERT(cachedRecovery.recovery().dataFormat() == DataFormatJS);
-            updateRecovery(cachedRecovery,
-                ValueRecovery::inRegister(wantedReg, DataFormatJS));
-        }
-    }
-
-    ASSERT(m_registers[wantedReg] == &cachedRecovery);
-}
-    
-bool CallFrameShuffler::tryAcquireTagTypeNumber()
-{
-    if (m_tagTypeNumber != InvalidGPRReg)
-        return true;
-
-    m_tagTypeNumber = getFreeGPR();
-
-    if (m_tagTypeNumber == InvalidGPRReg)
-        return false;
-
-    m_lockedRegisters.set(m_tagTypeNumber);
-    m_jit.move(MacroAssembler::TrustedImm64(TagTypeNumber), m_tagTypeNumber);
-    return true;
-}
-
-} // namespace JSC
-
-#endif // ENABLE(JIT) && USE(JSVALUE64)