317cf32131
This eliminates the AstValue class, effectively moving its
implementation into the Literal AstNode. This should cause
no difference in behavior, but it does signal some shifts
in the underlying system. Biggest changes include:
- Reduction in AST memory usage
- No duplicate HeapNumbers in Ignition constant pools
- Non-String values are allocated either at constant pool
creation time (or at boilerplate creation time for literals),
rather than at AstValueFactory::Internalize() time.
There are a variety of test-only/debug-only changes due to these
switches as well.
Bug: v8:6984
Change-Id: I5f178040ce2796d4e7370c24d1063419e1c843a1
Reviewed-on: https://chromium-review.googlesource.com/731111
Commit-Queue: Adam Klein <adamk@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49013}
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(isolate(), 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)) {
|
|
operand_scale = Bytecodes::PrefixBytecodeToOperandScale(final_bytecode);
|
|
prefix_offset = 1;
|
|
code = the_array->get(i + 1);
|
|
final_bytecode = Bytecodes::FromByte(code);
|
|
}
|
|
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(isolate(), 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(isolate(), 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(isolate(), 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(isolate(), 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(isolate(), 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(isolate(), 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(isolate(), 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(isolate(), 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(isolate(), 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
|