kmillikin@google.com
c70bcfcfa3
In sparse conditional constant propagation, replace instructions with constant smi values with their constant value. Extend the analysis to understant shift and bitwise binary operations. R=fschneider@google.com BUG= Review URL: https://codereview.chromium.org//10968058 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@12778 260f80e4-7a28-3924-810f-c04153c831b5
281 lines
8.7 KiB
C++
281 lines
8.7 KiB
C++
// Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#include "vm/bootstrap_natives.h"
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#include "vm/bigint_operations.h"
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#include "vm/dart_entry.h"
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#include "vm/exceptions.h"
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#include "vm/native_entry.h"
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#include "vm/object.h"
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namespace dart {
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DEFINE_FLAG(bool, trace_intrinsified_natives, false,
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"Report if any of the intrinsified natives are called");
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// Smi natives.
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// Returns false if integer is in wrong representation, e.g., as is a Bigint
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// when it could have been a Smi.
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static bool CheckInteger(const Integer& i) {
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if (i.IsBigint()) {
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Bigint& bigint = Bigint::Handle();
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bigint ^= i.raw();
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return !BigintOperations::FitsIntoSmi(bigint) &&
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!BigintOperations::FitsIntoMint(bigint);
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}
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if (i.IsMint()) {
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Mint& mint = Mint::Handle();
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mint ^= i.raw();
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return !Smi::IsValid64(mint.value());
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}
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return true;
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}
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DEFINE_NATIVE_ENTRY(Integer_bitAndFromInteger, 2) {
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const Integer& right = Integer::CheckedHandle(arguments->At(0));
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GET_NATIVE_ARGUMENT(Integer, left, arguments->At(1));
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ASSERT(CheckInteger(right));
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ASSERT(CheckInteger(left));
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if (FLAG_trace_intrinsified_natives) {
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OS::Print("Integer_bitAndFromInteger %s & %s\n",
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right.ToCString(), left.ToCString());
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}
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Integer& result =
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Integer::Handle(left.BitOp(Token::kBIT_AND, right));
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return result.AsInteger();
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}
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DEFINE_NATIVE_ENTRY(Integer_bitOrFromInteger, 2) {
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const Integer& right = Integer::CheckedHandle(arguments->At(0));
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GET_NATIVE_ARGUMENT(Integer, left, arguments->At(1));
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ASSERT(CheckInteger(right));
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ASSERT(CheckInteger(left));
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if (FLAG_trace_intrinsified_natives) {
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OS::Print("Integer_bitOrFromInteger %s | %s\n",
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left.ToCString(), right.ToCString());
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}
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Integer& result =
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Integer::Handle(left.BitOp(Token::kBIT_OR, right));
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return result.AsInteger();
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}
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DEFINE_NATIVE_ENTRY(Integer_bitXorFromInteger, 2) {
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const Integer& right = Integer::CheckedHandle(arguments->At(0));
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GET_NATIVE_ARGUMENT(Integer, left, arguments->At(1));
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ASSERT(CheckInteger(right));
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ASSERT(CheckInteger(left));
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if (FLAG_trace_intrinsified_natives) {
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OS::Print("Integer_bitXorFromInteger %s ^ %s\n",
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left.ToCString(), right.ToCString());
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}
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Integer& result =
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Integer::Handle(left.BitOp(Token::kBIT_XOR, right));
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return result.AsInteger();
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}
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DEFINE_NATIVE_ENTRY(Integer_addFromInteger, 2) {
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const Integer& right_int = Integer::CheckedHandle(arguments->At(0));
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GET_NATIVE_ARGUMENT(Integer, left_int, arguments->At(1));
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ASSERT(CheckInteger(right_int));
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ASSERT(CheckInteger(left_int));
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if (FLAG_trace_intrinsified_natives) {
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OS::Print("Integer_addFromInteger %s + %s\n",
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left_int.ToCString(), right_int.ToCString());
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}
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return left_int.ArithmeticOp(Token::kADD, right_int);
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}
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DEFINE_NATIVE_ENTRY(Integer_subFromInteger, 2) {
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const Integer& right_int = Integer::CheckedHandle(arguments->At(0));
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GET_NATIVE_ARGUMENT(Integer, left_int, arguments->At(1));
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ASSERT(CheckInteger(right_int));
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ASSERT(CheckInteger(left_int));
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if (FLAG_trace_intrinsified_natives) {
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OS::Print("Integer_subFromInteger %s - %s\n",
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left_int.ToCString(), right_int.ToCString());
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}
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return left_int.ArithmeticOp(Token::kSUB, right_int);
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}
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DEFINE_NATIVE_ENTRY(Integer_mulFromInteger, 2) {
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const Integer& right_int = Integer::CheckedHandle(arguments->At(0));
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GET_NATIVE_ARGUMENT(Integer, left_int, arguments->At(1));
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ASSERT(CheckInteger(right_int));
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ASSERT(CheckInteger(left_int));
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if (FLAG_trace_intrinsified_natives) {
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OS::Print("Integer_mulFromInteger %s * %s\n",
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left_int.ToCString(), right_int.ToCString());
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}
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return left_int.ArithmeticOp(Token::kMUL, right_int);
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}
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DEFINE_NATIVE_ENTRY(Integer_truncDivFromInteger, 2) {
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const Integer& right_int = Integer::CheckedHandle(arguments->At(0));
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GET_NATIVE_ARGUMENT(Integer, left_int, arguments->At(1));
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ASSERT(CheckInteger(right_int));
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ASSERT(CheckInteger(left_int));
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ASSERT(!right_int.IsZero());
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return left_int.ArithmeticOp(Token::kTRUNCDIV, right_int);
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}
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DEFINE_NATIVE_ENTRY(Integer_moduloFromInteger, 2) {
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const Integer& right_int = Integer::CheckedHandle(arguments->At(0));
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GET_NATIVE_ARGUMENT(Integer, left_int, arguments->At(1));
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ASSERT(CheckInteger(right_int));
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ASSERT(CheckInteger(right_int));
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if (FLAG_trace_intrinsified_natives) {
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OS::Print("Integer_moduloFromInteger %s mod %s\n",
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left_int.ToCString(), right_int.ToCString());
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}
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if (right_int.IsZero()) {
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// Should have been caught before calling into runtime.
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UNIMPLEMENTED();
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}
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return left_int.ArithmeticOp(Token::kMOD, right_int);
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}
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DEFINE_NATIVE_ENTRY(Integer_greaterThanFromInteger, 2) {
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const Integer& right = Integer::CheckedHandle(arguments->At(0));
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GET_NATIVE_ARGUMENT(Integer, left, arguments->At(1));
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ASSERT(CheckInteger(right));
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ASSERT(CheckInteger(left));
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if (FLAG_trace_intrinsified_natives) {
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OS::Print("Integer_greaterThanFromInteger %s > %s\n",
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left.ToCString(), right.ToCString());
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}
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return Bool::Get(left.CompareWith(right) == 1);
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}
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DEFINE_NATIVE_ENTRY(Integer_equalToInteger, 2) {
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const Integer& left = Integer::CheckedHandle(arguments->At(0));
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GET_NATIVE_ARGUMENT(Integer, right, arguments->At(1));
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ASSERT(CheckInteger(left));
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ASSERT(CheckInteger(right));
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if (FLAG_trace_intrinsified_natives) {
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OS::Print("Integer_equalToInteger %s == %s\n",
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left.ToCString(), right.ToCString());
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}
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return Bool::Get(left.CompareWith(right) == 0);
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}
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static RawInteger* ShiftOperationHelper(Token::Kind kind,
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const Integer& value,
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const Smi& amount) {
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if (amount.Value() < 0) {
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GrowableArray<const Object*> args;
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args.Add(&amount);
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Exceptions::ThrowByType(Exceptions::kIllegalArgument, args);
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}
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if (value.IsSmi()) {
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Smi& smi_value = Smi::Handle();
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smi_value ^= value.raw();
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return smi_value.ShiftOp(kind, amount);
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}
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Bigint& big_value = Bigint::Handle();
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if (value.IsMint()) {
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const int64_t mint_value = value.AsInt64Value();
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const int count = Utils::HighestBit(mint_value);
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if ((count + amount.Value()) < Mint::kBits) {
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switch (kind) {
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case Token::kSHL:
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return Integer::New(mint_value << amount.Value());
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case Token::kSHR:
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return Integer::New(mint_value >> amount.Value());
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default:
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UNIMPLEMENTED();
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}
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} else {
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// Overflow in shift, use Bigints
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big_value = BigintOperations::NewFromInt64(mint_value);
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}
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} else {
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ASSERT(value.IsBigint());
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big_value ^= value.raw();
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}
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switch (kind) {
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case Token::kSHL:
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return BigintOperations::ShiftLeft(big_value, amount.Value());
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case Token::kSHR:
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return BigintOperations::ShiftRight(big_value, amount.Value());
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default:
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UNIMPLEMENTED();
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}
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return Integer::null();
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}
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DEFINE_NATIVE_ENTRY(Smi_shrFromInt, 2) {
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const Smi& amount = Smi::CheckedHandle(arguments->At(0));
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GET_NATIVE_ARGUMENT(Integer, value, arguments->At(1));
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ASSERT(CheckInteger(amount));
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ASSERT(CheckInteger(value));
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Integer& result = Integer::Handle(
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ShiftOperationHelper(Token::kSHR, value, amount));
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return result.AsInteger();
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}
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DEFINE_NATIVE_ENTRY(Smi_shlFromInt, 2) {
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const Smi& amount = Smi::CheckedHandle(arguments->At(0));
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GET_NATIVE_ARGUMENT(Integer, value, arguments->At(1));
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ASSERT(CheckInteger(amount));
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ASSERT(CheckInteger(value));
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if (FLAG_trace_intrinsified_natives) {
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OS::Print("Smi_shlFromInt: %s << %s\n",
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value.ToCString(), amount.ToCString());
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}
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Integer& result = Integer::Handle(
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ShiftOperationHelper(Token::kSHL, value, amount));
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return result.AsInteger();
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}
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DEFINE_NATIVE_ENTRY(Smi_bitNegate, 1) {
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const Smi& operand = Smi::CheckedHandle(arguments->At(0));
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if (FLAG_trace_intrinsified_natives) {
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OS::Print("Smi_bitNegate: %s\n", operand.ToCString());
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}
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intptr_t result = ~operand.Value();
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ASSERT(Smi::IsValid(result));
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return Smi::New(result);
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}
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// Mint natives.
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DEFINE_NATIVE_ENTRY(Mint_bitNegate, 1) {
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const Mint& operand = Mint::CheckedHandle(arguments->At(0));
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ASSERT(CheckInteger(operand));
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if (FLAG_trace_intrinsified_natives) {
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OS::Print("Mint_bitNegate: %s\n", operand.ToCString());
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}
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int64_t result = ~operand.value();
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return Integer::New(result);
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}
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// Bigint natives.
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DEFINE_NATIVE_ENTRY(Bigint_bitNegate, 1) {
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const Bigint& value = Bigint::CheckedHandle(arguments->At(0));
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const Bigint& result = Bigint::Handle(BigintOperations::BitNot(value));
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ASSERT(CheckInteger(value));
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ASSERT(CheckInteger(result));
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return result.AsInteger();
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}
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} // namespace dart
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