aafdfba899
Removes Isolate from compilation info and instead threads isolate through function calls. This ensures that we can't access the isolate from background thread compilations. BUG=v8:5203 Cq-Include-Trybots: master.tryserver.chromium.linux:linux_chromium_rel_ng Change-Id: I9a4e1cd67c4736e36f609360b996fb55166a1c50 Reviewed-on: https://chromium-review.googlesource.com/751745 Commit-Queue: Ross McIlroy <rmcilroy@chromium.org> Reviewed-by: Michael Starzinger <mstarzinger@chromium.org> Cr-Commit-Position: refs/heads/master@{#49386}
871 lines
30 KiB
C++
871 lines
30 KiB
C++
// Copyright 2014 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include <limits>
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#include "src/v8.h"
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#include "src/ast/scopes.h"
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#include "src/interpreter/bytecode-array-builder.h"
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#include "src/interpreter/bytecode-array-iterator.h"
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#include "src/interpreter/bytecode-jump-table.h"
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#include "src/interpreter/bytecode-label.h"
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#include "src/interpreter/bytecode-register-allocator.h"
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#include "src/objects-inl.h"
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#include "test/unittests/test-utils.h"
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namespace v8 {
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namespace internal {
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namespace interpreter {
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class BytecodeArrayBuilderTest : public TestWithIsolateAndZone {
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public:
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BytecodeArrayBuilderTest() {}
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~BytecodeArrayBuilderTest() override {}
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};
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using ToBooleanMode = BytecodeArrayBuilder::ToBooleanMode;
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TEST_F(BytecodeArrayBuilderTest, AllBytecodesGenerated) {
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FeedbackVectorSpec feedback_spec(zone());
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BytecodeArrayBuilder builder(zone(), 1, 131, &feedback_spec);
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Factory* factory = isolate()->factory();
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AstValueFactory ast_factory(zone(), isolate()->ast_string_constants(),
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isolate()->heap()->HashSeed());
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DeclarationScope scope(zone(), &ast_factory);
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CHECK_EQ(builder.locals_count(), 131);
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CHECK_EQ(builder.fixed_register_count(), 131);
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Register reg(0);
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Register other(reg.index() + 1);
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Register wide(128);
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RegisterList reg_list(0, 10);
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RegisterList empty, single(0, 1), pair(0, 2), triple(0, 3);
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// Emit argument creation operations.
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builder.CreateArguments(CreateArgumentsType::kMappedArguments)
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.CreateArguments(CreateArgumentsType::kUnmappedArguments)
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.CreateArguments(CreateArgumentsType::kRestParameter);
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// Emit constant loads.
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builder.LoadLiteral(Smi::kZero)
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.StoreAccumulatorInRegister(reg)
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.LoadLiteral(Smi::FromInt(8))
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.CompareOperation(Token::Value::EQ, reg,
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1) // Prevent peephole optimization
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// LdaSmi, Star -> LdrSmi.
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.StoreAccumulatorInRegister(reg)
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.LoadLiteral(Smi::FromInt(10000000))
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.StoreAccumulatorInRegister(reg)
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.LoadLiteral(ast_factory.GetOneByteString("A constant"))
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.StoreAccumulatorInRegister(reg)
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.LoadUndefined()
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.StoreAccumulatorInRegister(reg)
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.LoadNull()
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.StoreAccumulatorInRegister(reg)
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.LoadTheHole()
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.StoreAccumulatorInRegister(reg)
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.LoadTrue()
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.StoreAccumulatorInRegister(reg)
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.LoadFalse()
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.StoreAccumulatorInRegister(wide);
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// Emit Ldar and Star taking care to foil the register optimizer.
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builder.StackCheck(0)
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.LoadAccumulatorWithRegister(other)
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.BinaryOperation(Token::ADD, reg, 1)
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.StoreAccumulatorInRegister(reg)
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.LoadNull();
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// Emit register-register transfer.
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builder.MoveRegister(reg, other);
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builder.MoveRegister(reg, wide);
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FeedbackSlot load_global_slot =
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feedback_spec.AddLoadGlobalICSlot(NOT_INSIDE_TYPEOF);
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FeedbackSlot load_global_typeof_slot =
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feedback_spec.AddLoadGlobalICSlot(INSIDE_TYPEOF);
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FeedbackSlot sloppy_store_global_slot =
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feedback_spec.AddStoreGlobalICSlot(LanguageMode::kSloppy);
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FeedbackSlot strict_store_global_slot =
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feedback_spec.AddStoreGlobalICSlot(LanguageMode::kStrict);
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FeedbackSlot load_slot = feedback_spec.AddLoadICSlot();
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FeedbackSlot keyed_load_slot = feedback_spec.AddKeyedLoadICSlot();
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FeedbackSlot sloppy_store_slot =
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feedback_spec.AddStoreICSlot(LanguageMode::kSloppy);
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FeedbackSlot strict_store_slot =
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feedback_spec.AddStoreICSlot(LanguageMode::kStrict);
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FeedbackSlot sloppy_keyed_store_slot =
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feedback_spec.AddKeyedStoreICSlot(LanguageMode::kSloppy);
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FeedbackSlot strict_keyed_store_slot =
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feedback_spec.AddKeyedStoreICSlot(LanguageMode::kStrict);
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FeedbackSlot store_own_slot = feedback_spec.AddStoreOwnICSlot();
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// Emit global load / store operations.
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const AstRawString* name = ast_factory.GetOneByteString("var_name");
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builder
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.LoadGlobal(name, load_global_slot.ToInt(), TypeofMode::NOT_INSIDE_TYPEOF)
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.LoadGlobal(name, load_global_typeof_slot.ToInt(),
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TypeofMode::INSIDE_TYPEOF)
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.StoreGlobal(name, sloppy_store_global_slot.ToInt(),
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LanguageMode::kSloppy)
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.StoreGlobal(name, strict_store_global_slot.ToInt(),
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LanguageMode::kStrict);
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// Emit context operations.
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builder.PushContext(reg)
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.PopContext(reg)
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.LoadContextSlot(reg, 1, 0, BytecodeArrayBuilder::kMutableSlot)
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.StoreContextSlot(reg, 1, 0)
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.LoadContextSlot(reg, 2, 0, BytecodeArrayBuilder::kImmutableSlot)
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.StoreContextSlot(reg, 3, 0);
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// Emit context operations which operate on the local context.
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builder
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.LoadContextSlot(Register::current_context(), 1, 0,
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BytecodeArrayBuilder::kMutableSlot)
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.StoreContextSlot(Register::current_context(), 1, 0)
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.LoadContextSlot(Register::current_context(), 2, 0,
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BytecodeArrayBuilder::kImmutableSlot)
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.StoreContextSlot(Register::current_context(), 3, 0);
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// Emit load / store property operations.
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builder.LoadNamedProperty(reg, name, load_slot.ToInt())
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.LoadKeyedProperty(reg, keyed_load_slot.ToInt())
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.StoreNamedProperty(reg, name, sloppy_store_slot.ToInt(),
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LanguageMode::kSloppy)
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.StoreKeyedProperty(reg, reg, sloppy_keyed_store_slot.ToInt(),
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LanguageMode::kSloppy)
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.StoreNamedProperty(reg, name, strict_store_slot.ToInt(),
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LanguageMode::kStrict)
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.StoreKeyedProperty(reg, reg, strict_keyed_store_slot.ToInt(),
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LanguageMode::kStrict)
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.StoreNamedOwnProperty(reg, name, store_own_slot.ToInt());
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// Emit load / store lookup slots.
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builder.LoadLookupSlot(name, TypeofMode::NOT_INSIDE_TYPEOF)
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.LoadLookupSlot(name, TypeofMode::INSIDE_TYPEOF)
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.StoreLookupSlot(name, LanguageMode::kSloppy, LookupHoistingMode::kNormal)
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.StoreLookupSlot(name, LanguageMode::kSloppy,
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LookupHoistingMode::kLegacySloppy)
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.StoreLookupSlot(name, LanguageMode::kStrict,
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LookupHoistingMode::kNormal);
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// Emit load / store lookup slots with context fast paths.
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builder.LoadLookupContextSlot(name, TypeofMode::NOT_INSIDE_TYPEOF, 1, 0)
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.LoadLookupContextSlot(name, TypeofMode::INSIDE_TYPEOF, 1, 0);
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// Emit load / store lookup slots with global fast paths.
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builder.LoadLookupGlobalSlot(name, TypeofMode::NOT_INSIDE_TYPEOF, 1, 0)
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.LoadLookupGlobalSlot(name, TypeofMode::INSIDE_TYPEOF, 1, 0);
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// Emit closure operations.
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builder.CreateClosure(0, 1, NOT_TENURED);
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// Emit create context operation.
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builder.CreateBlockContext(&scope);
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builder.CreateCatchContext(reg, name, &scope);
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builder.CreateFunctionContext(1);
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builder.CreateEvalContext(1);
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builder.CreateWithContext(reg, &scope);
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// Emit literal creation operations.
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builder.CreateRegExpLiteral(ast_factory.GetOneByteString("a"), 0, 0);
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builder.CreateArrayLiteral(0, 0, 0);
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builder.CreateObjectLiteral(0, 0, 0, reg);
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// Emit tagged template operations.
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builder.GetTemplateObject(0);
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// Call operations.
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builder.CallAnyReceiver(reg, reg_list, 1)
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.CallProperty(reg, reg_list, 1)
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.CallProperty(reg, single, 1)
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.CallProperty(reg, pair, 1)
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.CallProperty(reg, triple, 1)
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.CallUndefinedReceiver(reg, reg_list, 1)
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.CallUndefinedReceiver(reg, empty, 1)
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.CallUndefinedReceiver(reg, single, 1)
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.CallUndefinedReceiver(reg, pair, 1)
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.CallRuntime(Runtime::kIsArray, reg)
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.CallRuntimeForPair(Runtime::kLoadLookupSlotForCall, reg_list, pair)
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.CallJSRuntime(Context::SPREAD_ITERABLE_INDEX, reg_list)
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.CallWithSpread(reg, reg_list, 1);
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// Emit binary operator invocations.
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builder.BinaryOperation(Token::Value::ADD, reg, 1)
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.BinaryOperation(Token::Value::SUB, reg, 2)
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.BinaryOperation(Token::Value::MUL, reg, 3)
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.BinaryOperation(Token::Value::DIV, reg, 4)
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.BinaryOperation(Token::Value::MOD, reg, 5);
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// Emit bitwise operator invocations
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builder.BinaryOperation(Token::Value::BIT_OR, reg, 6)
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.BinaryOperation(Token::Value::BIT_XOR, reg, 7)
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.BinaryOperation(Token::Value::BIT_AND, reg, 8);
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// Emit shift operator invocations
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builder.BinaryOperation(Token::Value::SHL, reg, 9)
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.BinaryOperation(Token::Value::SAR, reg, 10)
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.BinaryOperation(Token::Value::SHR, reg, 11);
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// Emit Smi binary operations.
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builder.BinaryOperationSmiLiteral(Token::Value::ADD, Smi::FromInt(42), 2)
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.BinaryOperationSmiLiteral(Token::Value::SUB, Smi::FromInt(42), 2)
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.BinaryOperationSmiLiteral(Token::Value::MUL, Smi::FromInt(42), 2)
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.BinaryOperationSmiLiteral(Token::Value::DIV, Smi::FromInt(42), 2)
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.BinaryOperationSmiLiteral(Token::Value::MOD, Smi::FromInt(42), 2)
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.BinaryOperationSmiLiteral(Token::Value::BIT_OR, Smi::FromInt(42), 2)
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.BinaryOperationSmiLiteral(Token::Value::BIT_XOR, Smi::FromInt(42), 2)
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.BinaryOperationSmiLiteral(Token::Value::BIT_AND, Smi::FromInt(42), 2)
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.BinaryOperationSmiLiteral(Token::Value::SHL, Smi::FromInt(42), 2)
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.BinaryOperationSmiLiteral(Token::Value::SAR, Smi::FromInt(42), 2)
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.BinaryOperationSmiLiteral(Token::Value::SHR, Smi::FromInt(42), 2);
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// Emit unary and count operator invocations.
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builder.UnaryOperation(Token::Value::INC, 1)
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.UnaryOperation(Token::Value::DEC, 1)
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.UnaryOperation(Token::Value::ADD, 1)
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.UnaryOperation(Token::Value::SUB, 1)
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.UnaryOperation(Token::Value::BIT_NOT, 1);
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// Emit unary operator invocations.
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builder.LogicalNot(ToBooleanMode::kConvertToBoolean)
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.LogicalNot(ToBooleanMode::kAlreadyBoolean)
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.TypeOf();
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// Emit delete
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builder.Delete(reg, LanguageMode::kSloppy).Delete(reg, LanguageMode::kStrict);
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// Emit construct.
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builder.Construct(reg, reg_list, 1).ConstructWithSpread(reg, reg_list, 1);
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// Emit test operator invocations.
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builder.CompareOperation(Token::Value::EQ, reg, 1)
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.CompareOperation(Token::Value::EQ_STRICT, reg, 2)
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.CompareOperation(Token::Value::EQ_STRICT, reg)
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.CompareOperation(Token::Value::LT, reg, 3)
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.CompareOperation(Token::Value::GT, reg, 4)
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.CompareOperation(Token::Value::LTE, reg, 5)
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.CompareOperation(Token::Value::GTE, reg, 6)
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.CompareTypeOf(TestTypeOfFlags::LiteralFlag::kNumber)
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.CompareOperation(Token::Value::INSTANCEOF, reg, 7)
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.CompareOperation(Token::Value::IN, reg)
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.CompareUndetectable()
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.CompareUndefined()
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.CompareNull();
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// Emit conversion operator invocations.
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builder.ToNumber(1).ToNumeric(1).ToObject(reg).ToName(reg);
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// Emit GetSuperConstructor.
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builder.GetSuperConstructor(reg);
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// Hole checks.
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builder.ThrowReferenceErrorIfHole(name)
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.ThrowSuperAlreadyCalledIfNotHole()
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.ThrowSuperNotCalledIfHole();
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// Short jumps with Imm8 operands
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{
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BytecodeLabel start, after_jump1, after_jump2, after_jump3, after_jump4,
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after_jump5, after_jump6, after_jump7, after_jump8, after_jump9,
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after_jump10;
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builder.Bind(&start)
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.Jump(&after_jump1)
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.Bind(&after_jump1)
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.JumpIfNull(&after_jump2)
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.Bind(&after_jump2)
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.JumpIfNotNull(&after_jump3)
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.Bind(&after_jump3)
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.JumpIfUndefined(&after_jump4)
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.Bind(&after_jump4)
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.JumpIfNotUndefined(&after_jump5)
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.Bind(&after_jump5)
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.JumpIfJSReceiver(&after_jump6)
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.Bind(&after_jump6)
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.JumpIfTrue(ToBooleanMode::kConvertToBoolean, &after_jump7)
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.Bind(&after_jump7)
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.JumpIfTrue(ToBooleanMode::kAlreadyBoolean, &after_jump8)
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.Bind(&after_jump8)
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.JumpIfFalse(ToBooleanMode::kConvertToBoolean, &after_jump9)
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.Bind(&after_jump9)
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.JumpIfFalse(ToBooleanMode::kAlreadyBoolean, &after_jump10)
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.Bind(&after_jump10)
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.JumpLoop(&start, 0);
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}
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// Longer jumps with constant operands
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BytecodeLabel end[10];
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{
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BytecodeLabel after_jump;
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builder.Jump(&end[0])
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.Bind(&after_jump)
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.JumpIfTrue(ToBooleanMode::kConvertToBoolean, &end[1])
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.JumpIfTrue(ToBooleanMode::kAlreadyBoolean, &end[2])
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.JumpIfFalse(ToBooleanMode::kConvertToBoolean, &end[3])
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.JumpIfFalse(ToBooleanMode::kAlreadyBoolean, &end[4])
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.JumpIfNull(&end[5])
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.JumpIfNotNull(&end[6])
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.JumpIfUndefined(&end[7])
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.JumpIfNotUndefined(&end[8])
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.LoadLiteral(ast_factory.prototype_string())
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.JumpIfJSReceiver(&end[9]);
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}
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// Emit Smi table switch bytecode.
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BytecodeJumpTable* jump_table = builder.AllocateJumpTable(1, 0);
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builder.SwitchOnSmiNoFeedback(jump_table).Bind(jump_table, 0);
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// Emit set pending message bytecode.
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builder.SetPendingMessage();
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// Emit stack check bytecode.
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builder.StackCheck(0);
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// Emit throw and re-throw in it's own basic block so that the rest of the
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// code isn't omitted due to being dead.
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BytecodeLabel after_throw;
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builder.Throw().Bind(&after_throw);
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BytecodeLabel after_rethrow;
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builder.ReThrow().Bind(&after_rethrow);
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builder.ForInEnumerate(reg)
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.ForInPrepare(triple, 1)
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.ForInContinue(reg, reg)
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.ForInNext(reg, reg, pair, 1)
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.ForInStep(reg);
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// Wide constant pool loads
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for (int i = 0; i < 256; i++) {
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// Emit junk in constant pool to force wide constant pool index.
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builder.LoadLiteral(2.5321 + i);
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}
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builder.LoadLiteral(Smi::FromInt(20000000));
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const AstRawString* wide_name = ast_factory.GetOneByteString("var_wide_name");
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builder.StoreDataPropertyInLiteral(reg, reg,
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DataPropertyInLiteralFlag::kNoFlags, 0);
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// Emit wide context operations.
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builder.LoadContextSlot(reg, 1024, 0, BytecodeArrayBuilder::kMutableSlot)
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.StoreContextSlot(reg, 1024, 0);
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// Emit wide load / store lookup slots.
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builder.LoadLookupSlot(wide_name, TypeofMode::NOT_INSIDE_TYPEOF)
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.LoadLookupSlot(wide_name, TypeofMode::INSIDE_TYPEOF)
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.StoreLookupSlot(wide_name, LanguageMode::kSloppy,
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LookupHoistingMode::kNormal)
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.StoreLookupSlot(wide_name, LanguageMode::kSloppy,
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LookupHoistingMode::kLegacySloppy)
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.StoreLookupSlot(wide_name, LanguageMode::kStrict,
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LookupHoistingMode::kNormal);
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// CreateClosureWide
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builder.CreateClosure(1000, 321, NOT_TENURED);
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// Emit wide variant of literal creation operations.
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builder
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.CreateRegExpLiteral(ast_factory.GetOneByteString("wide_literal"), 0, 0)
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.CreateArrayLiteral(0, 0, 0)
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.CreateEmptyArrayLiteral(0)
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.CreateObjectLiteral(0, 0, 0, reg)
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.CreateEmptyObjectLiteral();
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// Emit load and store operations for module variables.
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builder.LoadModuleVariable(-1, 42)
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.LoadModuleVariable(0, 42)
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.LoadModuleVariable(1, 42)
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.StoreModuleVariable(-1, 42)
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.StoreModuleVariable(0, 42)
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.StoreModuleVariable(1, 42);
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// Emit generator operations.
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builder.SuspendGenerator(reg, reg_list, 0)
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.RestoreGeneratorState(reg)
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.RestoreGeneratorRegisters(reg, reg_list);
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// Intrinsics handled by the interpreter.
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builder.CallRuntime(Runtime::kInlineIsArray, reg_list);
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// Emit debugger bytecode.
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builder.Debugger();
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// Emit abort bytecode.
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{
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BytecodeLabel after;
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builder.Abort(kGenerator).Bind(&after);
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}
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// Insert dummy ops to force longer jumps.
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for (int i = 0; i < 256; i++) {
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builder.Debugger();
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}
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// Emit block counter increments.
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builder.IncBlockCounter(0);
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// Bind labels for long jumps at the very end.
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for (size_t i = 0; i < arraysize(end); i++) {
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builder.Bind(&end[i]);
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}
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// Return must be the last instruction.
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builder.Return();
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// Generate BytecodeArray.
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scope.SetScriptScopeInfo(factory->NewScopeInfo(1));
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ast_factory.Internalize(isolate());
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Handle<BytecodeArray> the_array = builder.ToBytecodeArray(isolate());
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CHECK_EQ(the_array->frame_size(),
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builder.total_register_count() * kPointerSize);
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// Build scorecard of bytecodes encountered in the BytecodeArray.
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std::vector<int> scorecard(Bytecodes::ToByte(Bytecode::kLast) + 1);
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Bytecode final_bytecode = Bytecode::kLdaZero;
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int i = 0;
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while (i < the_array->length()) {
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uint8_t code = the_array->get(i);
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scorecard[code] += 1;
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final_bytecode = Bytecodes::FromByte(code);
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OperandScale operand_scale = OperandScale::kSingle;
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int prefix_offset = 0;
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if (Bytecodes::IsPrefixScalingBytecode(final_bytecode)) {
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operand_scale = Bytecodes::PrefixBytecodeToOperandScale(final_bytecode);
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prefix_offset = 1;
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code = the_array->get(i + 1);
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final_bytecode = Bytecodes::FromByte(code);
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}
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i += prefix_offset + Bytecodes::Size(final_bytecode, operand_scale);
|
|
}
|
|
|
|
// Insert entry for illegal bytecode as this is never willingly emitted.
|
|
scorecard[Bytecodes::ToByte(Bytecode::kIllegal)] = 1;
|
|
|
|
// Bytecode for CollectTypeProfile is only emitted when
|
|
// Type Information for DevTools is turned on.
|
|
scorecard[Bytecodes::ToByte(Bytecode::kCollectTypeProfile)] = 1;
|
|
|
|
// Check return occurs at the end and only once in the BytecodeArray.
|
|
CHECK_EQ(final_bytecode, Bytecode::kReturn);
|
|
CHECK_EQ(scorecard[Bytecodes::ToByte(final_bytecode)], 1);
|
|
|
|
#define CHECK_BYTECODE_PRESENT(Name, ...) \
|
|
/* Check Bytecode is marked in scorecard, unless it's a debug break */ \
|
|
if (!Bytecodes::IsDebugBreak(Bytecode::k##Name)) { \
|
|
CHECK_GE(scorecard[Bytecodes::ToByte(Bytecode::k##Name)], 1); \
|
|
}
|
|
BYTECODE_LIST(CHECK_BYTECODE_PRESENT)
|
|
#undef CHECK_BYTECODE_PRESENT
|
|
}
|
|
|
|
|
|
TEST_F(BytecodeArrayBuilderTest, FrameSizesLookGood) {
|
|
for (int locals = 0; locals < 5; locals++) {
|
|
for (int temps = 0; temps < 3; temps++) {
|
|
BytecodeArrayBuilder builder(zone(), 1, locals);
|
|
BytecodeRegisterAllocator* allocator(builder.register_allocator());
|
|
for (int i = 0; i < locals; i++) {
|
|
builder.LoadLiteral(Smi::kZero);
|
|
builder.StoreAccumulatorInRegister(Register(i));
|
|
}
|
|
for (int i = 0; i < temps; i++) {
|
|
Register temp = allocator->NewRegister();
|
|
builder.LoadLiteral(Smi::kZero);
|
|
builder.StoreAccumulatorInRegister(temp);
|
|
// Ensure temporaries are used so not optimized away by the
|
|
// register optimizer.
|
|
builder.ToName(temp);
|
|
}
|
|
builder.Return();
|
|
|
|
Handle<BytecodeArray> the_array = builder.ToBytecodeArray(isolate());
|
|
int total_registers = locals + temps;
|
|
CHECK_EQ(the_array->frame_size(), total_registers * kPointerSize);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
TEST_F(BytecodeArrayBuilderTest, RegisterValues) {
|
|
int index = 1;
|
|
|
|
Register the_register(index);
|
|
CHECK_EQ(the_register.index(), index);
|
|
|
|
int actual_operand = the_register.ToOperand();
|
|
int actual_index = Register::FromOperand(actual_operand).index();
|
|
CHECK_EQ(actual_index, index);
|
|
}
|
|
|
|
|
|
TEST_F(BytecodeArrayBuilderTest, Parameters) {
|
|
BytecodeArrayBuilder builder(zone(), 10, 0);
|
|
|
|
Register receiver(builder.Receiver());
|
|
Register param8(builder.Parameter(8));
|
|
CHECK_EQ(param8.index() - receiver.index(), 9);
|
|
}
|
|
|
|
|
|
TEST_F(BytecodeArrayBuilderTest, Constants) {
|
|
BytecodeArrayBuilder builder(zone(), 1, 0);
|
|
AstValueFactory ast_factory(zone(), isolate()->ast_string_constants(),
|
|
isolate()->heap()->HashSeed());
|
|
|
|
double heap_num_1 = 3.14;
|
|
double heap_num_2 = 5.2;
|
|
double nan = std::numeric_limits<double>::quiet_NaN();
|
|
const AstRawString* string = ast_factory.GetOneByteString("foo");
|
|
const AstRawString* string_copy = ast_factory.GetOneByteString("foo");
|
|
|
|
builder.LoadLiteral(heap_num_1)
|
|
.LoadLiteral(heap_num_2)
|
|
.LoadLiteral(string)
|
|
.LoadLiteral(heap_num_1)
|
|
.LoadLiteral(heap_num_1)
|
|
.LoadLiteral(nan)
|
|
.LoadLiteral(string_copy)
|
|
.LoadLiteral(heap_num_2)
|
|
.LoadLiteral(nan)
|
|
.Return();
|
|
|
|
ast_factory.Internalize(isolate());
|
|
Handle<BytecodeArray> array = builder.ToBytecodeArray(isolate());
|
|
// Should only have one entry for each identical constant.
|
|
EXPECT_EQ(4, array->constant_pool()->length());
|
|
}
|
|
|
|
TEST_F(BytecodeArrayBuilderTest, ForwardJumps) {
|
|
static const int kFarJumpDistance = 256 + 20;
|
|
|
|
BytecodeArrayBuilder builder(zone(), 1, 1);
|
|
|
|
Register reg(0);
|
|
BytecodeLabel far0, far1, far2, far3, far4;
|
|
BytecodeLabel near0, near1, near2, near3, near4;
|
|
BytecodeLabel after_jump0, after_jump1;
|
|
|
|
builder.Jump(&near0)
|
|
.Bind(&after_jump0)
|
|
.CompareOperation(Token::Value::EQ, reg, 1)
|
|
.JumpIfTrue(ToBooleanMode::kAlreadyBoolean, &near1)
|
|
.CompareOperation(Token::Value::EQ, reg, 2)
|
|
.JumpIfFalse(ToBooleanMode::kAlreadyBoolean, &near2)
|
|
.BinaryOperation(Token::Value::ADD, reg, 1)
|
|
.JumpIfTrue(ToBooleanMode::kConvertToBoolean, &near3)
|
|
.BinaryOperation(Token::Value::ADD, reg, 2)
|
|
.JumpIfFalse(ToBooleanMode::kConvertToBoolean, &near4)
|
|
.Bind(&near0)
|
|
.Bind(&near1)
|
|
.Bind(&near2)
|
|
.Bind(&near3)
|
|
.Bind(&near4)
|
|
.Jump(&far0)
|
|
.Bind(&after_jump1)
|
|
.CompareOperation(Token::Value::EQ, reg, 3)
|
|
.JumpIfTrue(ToBooleanMode::kAlreadyBoolean, &far1)
|
|
.CompareOperation(Token::Value::EQ, reg, 4)
|
|
.JumpIfFalse(ToBooleanMode::kAlreadyBoolean, &far2)
|
|
.BinaryOperation(Token::Value::ADD, reg, 3)
|
|
.JumpIfTrue(ToBooleanMode::kConvertToBoolean, &far3)
|
|
.BinaryOperation(Token::Value::ADD, reg, 4)
|
|
.JumpIfFalse(ToBooleanMode::kConvertToBoolean, &far4);
|
|
for (int i = 0; i < kFarJumpDistance - 22; i++) {
|
|
builder.Debugger();
|
|
}
|
|
builder.Bind(&far0).Bind(&far1).Bind(&far2).Bind(&far3).Bind(&far4);
|
|
builder.Return();
|
|
|
|
Handle<BytecodeArray> array = builder.ToBytecodeArray(isolate());
|
|
DCHECK_EQ(array->length(), 44 + kFarJumpDistance - 22 + 1);
|
|
|
|
BytecodeArrayIterator iterator(array);
|
|
CHECK_EQ(iterator.current_bytecode(), Bytecode::kJump);
|
|
CHECK_EQ(iterator.GetUnsignedImmediateOperand(0), 22);
|
|
iterator.Advance();
|
|
|
|
// Ignore compare operation.
|
|
iterator.Advance();
|
|
|
|
CHECK_EQ(iterator.current_bytecode(), Bytecode::kJumpIfTrue);
|
|
CHECK_EQ(iterator.GetUnsignedImmediateOperand(0), 17);
|
|
iterator.Advance();
|
|
|
|
// Ignore compare operation.
|
|
iterator.Advance();
|
|
|
|
CHECK_EQ(iterator.current_bytecode(), Bytecode::kJumpIfFalse);
|
|
CHECK_EQ(iterator.GetUnsignedImmediateOperand(0), 12);
|
|
iterator.Advance();
|
|
|
|
// Ignore add operation.
|
|
iterator.Advance();
|
|
|
|
CHECK_EQ(iterator.current_bytecode(), Bytecode::kJumpIfToBooleanTrue);
|
|
CHECK_EQ(iterator.GetUnsignedImmediateOperand(0), 7);
|
|
iterator.Advance();
|
|
|
|
// Ignore add operation.
|
|
iterator.Advance();
|
|
|
|
CHECK_EQ(iterator.current_bytecode(), Bytecode::kJumpIfToBooleanFalse);
|
|
CHECK_EQ(iterator.GetUnsignedImmediateOperand(0), 2);
|
|
iterator.Advance();
|
|
|
|
CHECK_EQ(iterator.current_bytecode(), Bytecode::kJumpConstant);
|
|
CHECK_EQ(*iterator.GetConstantForIndexOperand(0),
|
|
Smi::FromInt(kFarJumpDistance));
|
|
iterator.Advance();
|
|
|
|
// Ignore compare operation.
|
|
iterator.Advance();
|
|
|
|
CHECK_EQ(iterator.current_bytecode(), Bytecode::kJumpIfTrueConstant);
|
|
CHECK_EQ(*iterator.GetConstantForIndexOperand(0),
|
|
Smi::FromInt(kFarJumpDistance - 5));
|
|
iterator.Advance();
|
|
|
|
// Ignore compare operation.
|
|
iterator.Advance();
|
|
|
|
CHECK_EQ(iterator.current_bytecode(), Bytecode::kJumpIfFalseConstant);
|
|
CHECK_EQ(*iterator.GetConstantForIndexOperand(0),
|
|
Smi::FromInt(kFarJumpDistance - 10));
|
|
iterator.Advance();
|
|
|
|
// Ignore add operation.
|
|
iterator.Advance();
|
|
|
|
CHECK_EQ(iterator.current_bytecode(), Bytecode::kJumpIfToBooleanTrueConstant);
|
|
CHECK_EQ(*iterator.GetConstantForIndexOperand(0),
|
|
Smi::FromInt(kFarJumpDistance - 15));
|
|
iterator.Advance();
|
|
|
|
// Ignore add operation.
|
|
iterator.Advance();
|
|
|
|
CHECK_EQ(iterator.current_bytecode(),
|
|
Bytecode::kJumpIfToBooleanFalseConstant);
|
|
CHECK_EQ(*iterator.GetConstantForIndexOperand(0),
|
|
Smi::FromInt(kFarJumpDistance - 20));
|
|
iterator.Advance();
|
|
}
|
|
|
|
|
|
TEST_F(BytecodeArrayBuilderTest, BackwardJumps) {
|
|
BytecodeArrayBuilder builder(zone(), 1, 1);
|
|
|
|
Register reg(0);
|
|
|
|
BytecodeLabel label0;
|
|
builder.Bind(&label0).JumpLoop(&label0, 0);
|
|
for (int i = 0; i < 42; i++) {
|
|
BytecodeLabel after_jump;
|
|
builder.JumpLoop(&label0, 0).Bind(&after_jump);
|
|
}
|
|
|
|
// Add padding to force wide backwards jumps.
|
|
for (int i = 0; i < 256; i++) {
|
|
builder.Debugger();
|
|
}
|
|
|
|
builder.JumpLoop(&label0, 0);
|
|
BytecodeLabel end;
|
|
builder.Bind(&end);
|
|
builder.Return();
|
|
|
|
Handle<BytecodeArray> array = builder.ToBytecodeArray(isolate());
|
|
BytecodeArrayIterator iterator(array);
|
|
CHECK_EQ(iterator.current_bytecode(), Bytecode::kJumpLoop);
|
|
CHECK_EQ(iterator.GetUnsignedImmediateOperand(0), 0);
|
|
iterator.Advance();
|
|
for (unsigned i = 0; i < 42; i++) {
|
|
CHECK_EQ(iterator.current_bytecode(), Bytecode::kJumpLoop);
|
|
CHECK_EQ(iterator.current_operand_scale(), OperandScale::kSingle);
|
|
// offset of 3 (because kJumpLoop takes two immediate operands)
|
|
CHECK_EQ(iterator.GetUnsignedImmediateOperand(0), i * 3 + 3);
|
|
iterator.Advance();
|
|
}
|
|
// Check padding to force wide backwards jumps.
|
|
for (int i = 0; i < 256; i++) {
|
|
CHECK_EQ(iterator.current_bytecode(), Bytecode::kDebugger);
|
|
iterator.Advance();
|
|
}
|
|
CHECK_EQ(iterator.current_bytecode(), Bytecode::kJumpLoop);
|
|
CHECK_EQ(iterator.current_operand_scale(), OperandScale::kDouble);
|
|
CHECK_EQ(iterator.GetUnsignedImmediateOperand(0), 386);
|
|
iterator.Advance();
|
|
CHECK_EQ(iterator.current_bytecode(), Bytecode::kReturn);
|
|
iterator.Advance();
|
|
CHECK(iterator.done());
|
|
}
|
|
|
|
TEST_F(BytecodeArrayBuilderTest, SmallSwitch) {
|
|
BytecodeArrayBuilder builder(zone(), 1, 1);
|
|
|
|
// Small jump table that fits into the single-size constant pool
|
|
int small_jump_table_size = 5;
|
|
int small_jump_table_base = -2;
|
|
BytecodeJumpTable* small_jump_table =
|
|
builder.AllocateJumpTable(small_jump_table_size, small_jump_table_base);
|
|
|
|
builder.LoadLiteral(Smi::FromInt(7)).SwitchOnSmiNoFeedback(small_jump_table);
|
|
for (int i = 0; i < small_jump_table_size; i++) {
|
|
builder.Bind(small_jump_table, small_jump_table_base + i).Debugger();
|
|
}
|
|
builder.Return();
|
|
|
|
Handle<BytecodeArray> array = builder.ToBytecodeArray(isolate());
|
|
BytecodeArrayIterator iterator(array);
|
|
|
|
CHECK_EQ(iterator.current_bytecode(), Bytecode::kLdaSmi);
|
|
iterator.Advance();
|
|
|
|
CHECK_EQ(iterator.current_bytecode(), Bytecode::kSwitchOnSmiNoFeedback);
|
|
CHECK_EQ(iterator.current_operand_scale(), OperandScale::kSingle);
|
|
{
|
|
int i = 0;
|
|
int switch_end =
|
|
iterator.current_offset() + iterator.current_bytecode_size();
|
|
|
|
for (const auto& entry : iterator.GetJumpTableTargetOffsets()) {
|
|
CHECK_EQ(entry.case_value, small_jump_table_base + i);
|
|
CHECK_EQ(entry.target_offset, switch_end + i);
|
|
|
|
i++;
|
|
}
|
|
CHECK_EQ(i, small_jump_table_size);
|
|
}
|
|
iterator.Advance();
|
|
|
|
for (int i = 0; i < small_jump_table_size; i++) {
|
|
CHECK_EQ(iterator.current_bytecode(), Bytecode::kDebugger);
|
|
iterator.Advance();
|
|
}
|
|
|
|
CHECK_EQ(iterator.current_bytecode(), Bytecode::kReturn);
|
|
iterator.Advance();
|
|
CHECK(iterator.done());
|
|
}
|
|
|
|
TEST_F(BytecodeArrayBuilderTest, WideSwitch) {
|
|
BytecodeArrayBuilder builder(zone(), 1, 1);
|
|
|
|
// Large jump table that requires a wide Switch bytecode.
|
|
int large_jump_table_size = 256;
|
|
int large_jump_table_base = -10;
|
|
BytecodeJumpTable* large_jump_table =
|
|
builder.AllocateJumpTable(large_jump_table_size, large_jump_table_base);
|
|
|
|
builder.LoadLiteral(Smi::FromInt(7)).SwitchOnSmiNoFeedback(large_jump_table);
|
|
for (int i = 0; i < large_jump_table_size; i++) {
|
|
builder.Bind(large_jump_table, large_jump_table_base + i).Debugger();
|
|
}
|
|
builder.Return();
|
|
|
|
Handle<BytecodeArray> array = builder.ToBytecodeArray(isolate());
|
|
BytecodeArrayIterator iterator(array);
|
|
|
|
CHECK_EQ(iterator.current_bytecode(), Bytecode::kLdaSmi);
|
|
iterator.Advance();
|
|
|
|
CHECK_EQ(iterator.current_bytecode(), Bytecode::kSwitchOnSmiNoFeedback);
|
|
CHECK_EQ(iterator.current_operand_scale(), OperandScale::kDouble);
|
|
{
|
|
int i = 0;
|
|
int switch_end =
|
|
iterator.current_offset() + iterator.current_bytecode_size();
|
|
|
|
for (const auto& entry : iterator.GetJumpTableTargetOffsets()) {
|
|
CHECK_EQ(entry.case_value, large_jump_table_base + i);
|
|
CHECK_EQ(entry.target_offset, switch_end + i);
|
|
|
|
i++;
|
|
}
|
|
CHECK_EQ(i, large_jump_table_size);
|
|
}
|
|
iterator.Advance();
|
|
|
|
for (int i = 0; i < large_jump_table_size; i++) {
|
|
CHECK_EQ(iterator.current_bytecode(), Bytecode::kDebugger);
|
|
iterator.Advance();
|
|
}
|
|
|
|
CHECK_EQ(iterator.current_bytecode(), Bytecode::kReturn);
|
|
iterator.Advance();
|
|
CHECK(iterator.done());
|
|
}
|
|
|
|
TEST_F(BytecodeArrayBuilderTest, LabelReuse) {
|
|
BytecodeArrayBuilder builder(zone(), 1, 0);
|
|
|
|
// Labels can only have 1 forward reference, but
|
|
// can be referred to mulitple times once bound.
|
|
BytecodeLabel label, after_jump0, after_jump1;
|
|
|
|
builder.Jump(&label)
|
|
.Bind(&label)
|
|
.JumpLoop(&label, 0)
|
|
.Bind(&after_jump0)
|
|
.JumpLoop(&label, 0)
|
|
.Bind(&after_jump1)
|
|
.Return();
|
|
|
|
Handle<BytecodeArray> array = builder.ToBytecodeArray(isolate());
|
|
BytecodeArrayIterator iterator(array);
|
|
CHECK_EQ(iterator.current_bytecode(), Bytecode::kJump);
|
|
CHECK_EQ(iterator.GetUnsignedImmediateOperand(0), 2);
|
|
iterator.Advance();
|
|
CHECK_EQ(iterator.current_bytecode(), Bytecode::kJumpLoop);
|
|
CHECK_EQ(iterator.GetUnsignedImmediateOperand(0), 0);
|
|
iterator.Advance();
|
|
CHECK_EQ(iterator.current_bytecode(), Bytecode::kJumpLoop);
|
|
CHECK_EQ(iterator.GetUnsignedImmediateOperand(0), 3);
|
|
iterator.Advance();
|
|
CHECK_EQ(iterator.current_bytecode(), Bytecode::kReturn);
|
|
iterator.Advance();
|
|
CHECK(iterator.done());
|
|
}
|
|
|
|
|
|
TEST_F(BytecodeArrayBuilderTest, LabelAddressReuse) {
|
|
static const int kRepeats = 3;
|
|
|
|
BytecodeArrayBuilder builder(zone(), 1, 0);
|
|
for (int i = 0; i < kRepeats; i++) {
|
|
BytecodeLabel label, after_jump0, after_jump1;
|
|
builder.Jump(&label)
|
|
.Bind(&label)
|
|
.JumpLoop(&label, 0)
|
|
.Bind(&after_jump0)
|
|
.JumpLoop(&label, 0)
|
|
.Bind(&after_jump1);
|
|
}
|
|
builder.Return();
|
|
|
|
Handle<BytecodeArray> array = builder.ToBytecodeArray(isolate());
|
|
BytecodeArrayIterator iterator(array);
|
|
for (int i = 0; i < kRepeats; i++) {
|
|
CHECK_EQ(iterator.current_bytecode(), Bytecode::kJump);
|
|
CHECK_EQ(iterator.GetUnsignedImmediateOperand(0), 2);
|
|
iterator.Advance();
|
|
CHECK_EQ(iterator.current_bytecode(), Bytecode::kJumpLoop);
|
|
CHECK_EQ(iterator.GetUnsignedImmediateOperand(0), 0);
|
|
iterator.Advance();
|
|
CHECK_EQ(iterator.current_bytecode(), Bytecode::kJumpLoop);
|
|
CHECK_EQ(iterator.GetUnsignedImmediateOperand(0), 3);
|
|
iterator.Advance();
|
|
}
|
|
CHECK_EQ(iterator.current_bytecode(), Bytecode::kReturn);
|
|
iterator.Advance();
|
|
CHECK(iterator.done());
|
|
}
|
|
|
|
} // namespace interpreter
|
|
} // namespace internal
|
|
} // namespace v8
|