Merge WebKit at r75315: Initial merge by git.

Change-Id: I570314b346ce101c935ed22a626b48c2af266b84

1 files changed, 356 insertions, 0 deletions

diff --git a/Source/JavaScriptCore/jit/JITCall32_64.cpp b/Source/JavaScriptCore/jit/JITCall32_64.cpp
new file mode 100644
index 0000000..daf5d2d
--- /dev/null
+++ b/Source/JavaScriptCore/jit/JITCall32_64.cpp
@@ -0,0 +1,356 @@
+/*
+ * Copyright (C) 2008 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"
+
+#if ENABLE(JIT)
+#if USE(JSVALUE32_64)
+#include "JIT.h"
+
+#include "CodeBlock.h"
+#include "Interpreter.h"
+#include "JITInlineMethods.h"
+#include "JITStubCall.h"
+#include "JSArray.h"
+#include "JSFunction.h"
+#include "ResultType.h"
+#include "SamplingTool.h"
+
+#ifndef NDEBUG
+#include <stdio.h>
+#endif
+
+using namespace std;
+
+namespace JSC {
+
+void JIT::compileOpCallInitializeCallFrame()
+{
+    // regT0 holds callee, regT1 holds argCount
+    store32(regT1, Address(callFrameRegister, RegisterFile::ArgumentCount * static_cast<int>(sizeof(Register))));
+    loadPtr(Address(regT0, OBJECT_OFFSETOF(JSFunction, m_scopeChain) + OBJECT_OFFSETOF(ScopeChain, m_node)), regT3); // scopeChain
+    storePtr(regT0, Address(callFrameRegister, RegisterFile::Callee * static_cast<int>(sizeof(Register)))); // callee
+    storePtr(regT3, Address(callFrameRegister, RegisterFile::ScopeChain * static_cast<int>(sizeof(Register)))); // scopeChain
+}
+
+void JIT::emit_op_call_put_result(Instruction* instruction)
+{
+    int dst = instruction[1].u.operand;
+    emitStore(dst, regT1, regT0);
+}
+
+void JIT::compileOpCallVarargs(Instruction* instruction)
+{
+    int callee = instruction[1].u.operand;
+    int argCountRegister = instruction[2].u.operand;
+    int registerOffset = instruction[3].u.operand;
+
+    emitLoad(callee, regT1, regT0);
+    emitLoadPayload(argCountRegister, regT2); // argCount
+    addPtr(Imm32(registerOffset), regT2, regT3); // registerOffset
+
+    emitJumpSlowCaseIfNotJSCell(callee, regT1);
+    addSlowCase(branchPtr(NotEqual, Address(regT0), ImmPtr(m_globalData->jsFunctionVPtr)));
+
+    // Speculatively roll the callframe, assuming argCount will match the arity.
+    mul32(Imm32(sizeof(Register)), regT3, regT3);
+    addPtr(callFrameRegister, regT3);
+    storePtr(callFrameRegister, Address(regT3, RegisterFile::CallerFrame * static_cast<int>(sizeof(Register))));
+    move(regT3, callFrameRegister);
+
+    move(regT2, regT1); // argCount
+
+    emitNakedCall(m_globalData->jitStubs->ctiVirtualCall());
+
+    sampleCodeBlock(m_codeBlock);
+}
+
+void JIT::compileOpCallVarargsSlowCase(Instruction* instruction, Vector<SlowCaseEntry>::iterator& iter)
+{
+    int callee = instruction[1].u.operand;
+
+    linkSlowCaseIfNotJSCell(iter, callee);
+    linkSlowCase(iter);
+
+    JITStubCall stubCall(this, cti_op_call_NotJSFunction);
+    stubCall.addArgument(regT1, regT0);
+    stubCall.addArgument(regT3);
+    stubCall.addArgument(regT2);
+    stubCall.call();
+
+    sampleCodeBlock(m_codeBlock);
+}
+
+void JIT::emit_op_ret(Instruction* currentInstruction)
+{
+    unsigned dst = currentInstruction[1].u.operand;
+
+    // We could JIT generate the deref, only calling out to C when the refcount hits zero.
+    if (m_codeBlock->needsFullScopeChain()) {
+        Jump activationNotCreated = branch32(Equal, tagFor(m_codeBlock->activationRegister()), Imm32(JSValue::EmptyValueTag));
+        JITStubCall(this, cti_op_ret_scopeChain).call();
+        activationNotCreated.link(this);
+    }
+    emitLoad(dst, regT1, regT0);
+    emitGetFromCallFrameHeaderPtr(RegisterFile::ReturnPC, regT2);
+    emitGetFromCallFrameHeaderPtr(RegisterFile::CallerFrame, callFrameRegister);
+
+    restoreReturnAddressBeforeReturn(regT2);
+    ret();
+}
+
+void JIT::emit_op_ret_object_or_this(Instruction* currentInstruction)
+{
+    unsigned result = currentInstruction[1].u.operand;
+    unsigned thisReg = currentInstruction[2].u.operand;
+
+    // We could JIT generate the deref, only calling out to C when the refcount hits zero.
+    if (m_codeBlock->needsFullScopeChain()) {
+        Jump activationNotCreated = branch32(Equal, tagFor(m_codeBlock->activationRegister()), Imm32(JSValue::EmptyValueTag));
+        JITStubCall(this, cti_op_ret_scopeChain).call();
+        activationNotCreated.link(this);
+    }
+
+    emitLoad(result, regT1, regT0);
+    Jump notJSCell = branch32(NotEqual, regT1, Imm32(JSValue::CellTag));
+    loadPtr(Address(regT0, OBJECT_OFFSETOF(JSCell, m_structure)), regT2);
+    Jump notObject = branch8(NotEqual, Address(regT2, OBJECT_OFFSETOF(Structure, m_typeInfo) + OBJECT_OFFSETOF(TypeInfo, m_type)), Imm32(ObjectType));
+
+    emitGetFromCallFrameHeaderPtr(RegisterFile::ReturnPC, regT2);
+    emitGetFromCallFrameHeaderPtr(RegisterFile::CallerFrame, callFrameRegister);
+
+    restoreReturnAddressBeforeReturn(regT2);
+    ret();
+
+    notJSCell.link(this);
+    notObject.link(this);
+    emitLoad(thisReg, regT1, regT0);
+
+    emitGetFromCallFrameHeaderPtr(RegisterFile::ReturnPC, regT2);
+    emitGetFromCallFrameHeaderPtr(RegisterFile::CallerFrame, callFrameRegister);
+
+    restoreReturnAddressBeforeReturn(regT2);
+    ret();
+}
+
+void JIT::emitSlow_op_call(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
+{
+    compileOpCallSlowCase(currentInstruction, iter, m_callLinkInfoIndex++, op_call);
+}
+
+void JIT::emitSlow_op_call_eval(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
+{
+    compileOpCallSlowCase(currentInstruction, iter, m_callLinkInfoIndex++, op_call_eval);
+}
+
+void JIT::emitSlow_op_call_varargs(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
+{
+    compileOpCallVarargsSlowCase(currentInstruction, iter);
+}
+
+void JIT::emitSlow_op_construct(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
+{
+    compileOpCallSlowCase(currentInstruction, iter, m_callLinkInfoIndex++, op_construct);
+}
+
+void JIT::emit_op_call(Instruction* currentInstruction)
+{
+    compileOpCall(op_call, currentInstruction, m_callLinkInfoIndex++);
+}
+
+void JIT::emit_op_call_eval(Instruction* currentInstruction)
+{
+    compileOpCall(op_call_eval, currentInstruction, m_callLinkInfoIndex++);
+}
+
+void JIT::emit_op_call_varargs(Instruction* currentInstruction)
+{
+    compileOpCallVarargs(currentInstruction);
+}
+
+void JIT::emit_op_construct(Instruction* currentInstruction)
+{
+    compileOpCall(op_construct, currentInstruction, m_callLinkInfoIndex++);
+}
+
+#if !ENABLE(JIT_OPTIMIZE_CALL)
+
+/* ------------------------------ BEGIN: !ENABLE(JIT_OPTIMIZE_CALL) ------------------------------ */
+
+void JIT::compileOpCall(OpcodeID opcodeID, Instruction* instruction, unsigned)
+{
+    int callee = instruction[1].u.operand;
+    int argCount = instruction[2].u.operand;
+    int registerOffset = instruction[3].u.operand;
+
+    Jump wasEval;
+    if (opcodeID == op_call_eval) {
+        JITStubCall stubCall(this, cti_op_call_eval);
+        stubCall.addArgument(callee);
+        stubCall.addArgument(JIT::Imm32(registerOffset));
+        stubCall.addArgument(JIT::Imm32(argCount));
+        stubCall.call();
+        wasEval = branch32(NotEqual, regT1, Imm32(JSValue::EmptyValueTag));
+    }
+
+    emitLoad(callee, regT1, regT0);
+
+    emitJumpSlowCaseIfNotJSCell(callee, regT1);
+    addSlowCase(branchPtr(NotEqual, Address(regT0), ImmPtr(m_globalData->jsFunctionVPtr)));
+
+    // Speculatively roll the callframe, assuming argCount will match the arity.
+    storePtr(callFrameRegister, Address(callFrameRegister, (RegisterFile::CallerFrame + registerOffset) * static_cast<int>(sizeof(Register))));
+    addPtr(Imm32(registerOffset * static_cast<int>(sizeof(Register))), callFrameRegister);
+    move(Imm32(argCount), regT1);
+
+    emitNakedCall(opcodeID == op_construct ? m_globalData->jitStubs->ctiVirtualConstruct() : m_globalData->jitStubs->ctiVirtualCall());
+
+    if (opcodeID == op_call_eval)
+        wasEval.link(this);
+
+    sampleCodeBlock(m_codeBlock);
+}
+
+void JIT::compileOpCallSlowCase(Instruction* instruction, Vector<SlowCaseEntry>::iterator& iter, unsigned, OpcodeID opcodeID)
+{
+    int callee = instruction[1].u.operand;
+    int argCount = instruction[2].u.operand;
+    int registerOffset = instruction[3].u.operand;
+
+    linkSlowCaseIfNotJSCell(iter, callee);
+    linkSlowCase(iter);
+
+    JITStubCall stubCall(this, opcodeID == op_construct ? cti_op_construct_NotJSConstruct : cti_op_call_NotJSFunction);
+    stubCall.addArgument(callee);
+    stubCall.addArgument(JIT::Imm32(registerOffset));
+    stubCall.addArgument(JIT::Imm32(argCount));
+    stubCall.call();
+
+    sampleCodeBlock(m_codeBlock);
+}
+
+#else // !ENABLE(JIT_OPTIMIZE_CALL)
+
+/* ------------------------------ BEGIN: ENABLE(JIT_OPTIMIZE_CALL) ------------------------------ */
+
+void JIT::compileOpCall(OpcodeID opcodeID, Instruction* instruction, unsigned callLinkInfoIndex)
+{
+    int callee = instruction[1].u.operand;
+    int argCount = instruction[2].u.operand;
+    int registerOffset = instruction[3].u.operand;
+
+    Jump wasEval;
+    if (opcodeID == op_call_eval) {
+        JITStubCall stubCall(this, cti_op_call_eval);
+        stubCall.addArgument(callee);
+        stubCall.addArgument(JIT::Imm32(registerOffset));
+        stubCall.addArgument(JIT::Imm32(argCount));
+        stubCall.call();
+        wasEval = branch32(NotEqual, regT1, Imm32(JSValue::EmptyValueTag));
+    }
+
+    emitLoad(callee, regT1, regT0);
+
+    DataLabelPtr addressOfLinkedFunctionCheck;
+
+    BEGIN_UNINTERRUPTED_SEQUENCE(sequenceOpCall);
+
+    Jump jumpToSlow = branchPtrWithPatch(NotEqual, regT0, addressOfLinkedFunctionCheck, ImmPtr(0));
+
+    END_UNINTERRUPTED_SEQUENCE(sequenceOpCall);
+
+    addSlowCase(jumpToSlow);
+    ASSERT(differenceBetween(addressOfLinkedFunctionCheck, jumpToSlow) == patchOffsetOpCallCompareToJump);
+    m_callStructureStubCompilationInfo[callLinkInfoIndex].hotPathBegin = addressOfLinkedFunctionCheck;
+
+    addSlowCase(branch32(NotEqual, regT1, Imm32(JSValue::CellTag)));
+
+    // The following is the fast case, only used whan a callee can be linked.
+
+    // Fast version of stack frame initialization, directly relative to edi.
+    // Note that this omits to set up RegisterFile::CodeBlock, which is set in the callee
+    loadPtr(Address(regT0, OBJECT_OFFSETOF(JSFunction, m_scopeChain) + OBJECT_OFFSETOF(ScopeChain, m_node)), regT2);
+
+    store32(Imm32(argCount), Address(callFrameRegister, (registerOffset + RegisterFile::ArgumentCount) * static_cast<int>(sizeof(Register))));
+    storePtr(callFrameRegister, Address(callFrameRegister, (registerOffset + RegisterFile::CallerFrame) * static_cast<int>(sizeof(Register))));
+    emitStore(registerOffset + RegisterFile::Callee, regT1, regT0);
+    storePtr(regT2, Address(callFrameRegister, (registerOffset + RegisterFile::ScopeChain) * static_cast<int>(sizeof(Register))));
+    addPtr(Imm32(registerOffset * sizeof(Register)), callFrameRegister);
+
+    // Call to the callee
+    m_callStructureStubCompilationInfo[callLinkInfoIndex].hotPathOther = emitNakedCall();
+    
+    if (opcodeID == op_call_eval)
+        wasEval.link(this);
+
+    sampleCodeBlock(m_codeBlock);
+}
+
+void JIT::compileOpCallSlowCase(Instruction* instruction, Vector<SlowCaseEntry>::iterator& iter, unsigned callLinkInfoIndex, OpcodeID opcodeID)
+{
+    int callee = instruction[1].u.operand;
+    int argCount = instruction[2].u.operand;
+    int registerOffset = instruction[3].u.operand;
+
+    linkSlowCase(iter);
+    linkSlowCase(iter);
+
+    // Fast check for JS function.
+    Jump callLinkFailNotObject = branch32(NotEqual, regT1, Imm32(JSValue::CellTag));
+    Jump callLinkFailNotJSFunction = branchPtr(NotEqual, Address(regT0), ImmPtr(m_globalData->jsFunctionVPtr));
+
+    // Speculatively roll the callframe, assuming argCount will match the arity.
+    storePtr(callFrameRegister, Address(callFrameRegister, (RegisterFile::CallerFrame + registerOffset) * static_cast<int>(sizeof(Register))));
+    addPtr(Imm32(registerOffset * static_cast<int>(sizeof(Register))), callFrameRegister);
+    move(Imm32(argCount), regT1);
+
+    m_callStructureStubCompilationInfo[callLinkInfoIndex].callReturnLocation = emitNakedCall(opcodeID == op_construct ? m_globalData->jitStubs->ctiVirtualConstructLink() : m_globalData->jitStubs->ctiVirtualCallLink());
+
+    // Done! - return back to the hot path.
+    ASSERT(OPCODE_LENGTH(op_call) == OPCODE_LENGTH(op_call_eval));
+    ASSERT(OPCODE_LENGTH(op_call) == OPCODE_LENGTH(op_construct));
+    emitJumpSlowToHot(jump(), OPCODE_LENGTH(op_call));
+
+    // This handles host functions
+    callLinkFailNotObject.link(this);
+    callLinkFailNotJSFunction.link(this);
+
+    JITStubCall stubCall(this, opcodeID == op_construct ? cti_op_construct_NotJSConstruct : cti_op_call_NotJSFunction);
+    stubCall.addArgument(callee);
+    stubCall.addArgument(JIT::Imm32(registerOffset));
+    stubCall.addArgument(JIT::Imm32(argCount));
+    stubCall.call();
+
+    sampleCodeBlock(m_codeBlock);
+}
+
+/* ------------------------------ END: !ENABLE / ENABLE(JIT_OPTIMIZE_CALL) ------------------------------ */
+
+#endif // !ENABLE(JIT_OPTIMIZE_CALL)
+
+} // namespace JSC
+
+#endif // USE(JSVALUE32_64)
+#endif // ENABLE(JIT)