0737ec8dcb
Since we add more type (StringType, PrimitiveType) the name NumberInfo does not make sense anymore. Review URL: http://codereview.chromium.org/1207006 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@4268 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
154 lines
6.3 KiB
C++
154 lines
6.3 KiB
C++
// Copyright 2008 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#include "v8.h"
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#include "codegen-inl.h"
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#include "register-allocator-inl.h"
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#include "virtual-frame-inl.h"
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namespace v8 {
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namespace internal {
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// -------------------------------------------------------------------------
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// Result implementation.
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void Result::ToRegister() {
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ASSERT(is_valid());
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if (is_constant()) {
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Result fresh = CodeGeneratorScope::Current()->allocator()->Allocate();
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ASSERT(fresh.is_valid());
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if (is_untagged_int32()) {
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fresh.set_untagged_int32(true);
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if (handle()->IsSmi()) {
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CodeGeneratorScope::Current()->masm()->Set(
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fresh.reg(),
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Immediate(Smi::cast(*handle())->value()));
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} else if (handle()->IsHeapNumber()) {
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double double_value = HeapNumber::cast(*handle())->value();
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int32_t value = DoubleToInt32(double_value);
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if (double_value == 0 && signbit(double_value)) {
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// Negative zero must not be converted to an int32 unless
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// the context allows it.
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CodeGeneratorScope::Current()->unsafe_bailout_->Branch(equal);
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CodeGeneratorScope::Current()->unsafe_bailout_->Branch(not_equal);
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} else if (double_value == value) {
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CodeGeneratorScope::Current()->masm()->Set(
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fresh.reg(), Immediate(value));
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} else {
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CodeGeneratorScope::Current()->unsafe_bailout_->Branch(equal);
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CodeGeneratorScope::Current()->unsafe_bailout_->Branch(not_equal);
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}
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} else {
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// Constant is not a number. This was not predicted by AST analysis.
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CodeGeneratorScope::Current()->unsafe_bailout_->Branch(equal);
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CodeGeneratorScope::Current()->unsafe_bailout_->Branch(not_equal);
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}
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} else if (CodeGeneratorScope::Current()->IsUnsafeSmi(handle())) {
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CodeGeneratorScope::Current()->MoveUnsafeSmi(fresh.reg(), handle());
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} else {
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CodeGeneratorScope::Current()->masm()->Set(fresh.reg(),
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Immediate(handle()));
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}
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// This result becomes a copy of the fresh one.
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fresh.set_type_info(type_info());
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*this = fresh;
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}
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ASSERT(is_register());
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}
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void Result::ToRegister(Register target) {
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ASSERT(is_valid());
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if (!is_register() || !reg().is(target)) {
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Result fresh = CodeGeneratorScope::Current()->allocator()->Allocate(target);
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ASSERT(fresh.is_valid());
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if (is_register()) {
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CodeGeneratorScope::Current()->masm()->mov(fresh.reg(), reg());
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} else {
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ASSERT(is_constant());
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if (is_untagged_int32()) {
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if (handle()->IsSmi()) {
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CodeGeneratorScope::Current()->masm()->Set(
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fresh.reg(),
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Immediate(Smi::cast(*handle())->value()));
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} else {
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ASSERT(handle()->IsHeapNumber());
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double double_value = HeapNumber::cast(*handle())->value();
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int32_t value = DoubleToInt32(double_value);
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if (double_value == 0 && signbit(double_value)) {
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// Negative zero must not be converted to an int32 unless
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// the context allows it.
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CodeGeneratorScope::Current()->unsafe_bailout_->Branch(equal);
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CodeGeneratorScope::Current()->unsafe_bailout_->Branch(not_equal);
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} else if (double_value == value) {
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CodeGeneratorScope::Current()->masm()->Set(
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fresh.reg(), Immediate(value));
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} else {
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CodeGeneratorScope::Current()->unsafe_bailout_->Branch(equal);
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CodeGeneratorScope::Current()->unsafe_bailout_->Branch(not_equal);
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}
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}
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} else {
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if (CodeGeneratorScope::Current()->IsUnsafeSmi(handle())) {
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CodeGeneratorScope::Current()->MoveUnsafeSmi(fresh.reg(), handle());
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} else {
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CodeGeneratorScope::Current()->masm()->Set(fresh.reg(),
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Immediate(handle()));
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}
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}
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}
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fresh.set_type_info(type_info());
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fresh.set_untagged_int32(is_untagged_int32());
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*this = fresh;
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} else if (is_register() && reg().is(target)) {
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ASSERT(CodeGeneratorScope::Current()->has_valid_frame());
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CodeGeneratorScope::Current()->frame()->Spill(target);
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ASSERT(CodeGeneratorScope::Current()->allocator()->count(target) == 1);
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}
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ASSERT(is_register());
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ASSERT(reg().is(target));
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}
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// -------------------------------------------------------------------------
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// RegisterAllocator implementation.
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Result RegisterAllocator::AllocateByteRegisterWithoutSpilling() {
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Result result = AllocateWithoutSpilling();
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// Check that the register is a byte register. If not, unuse the
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// register if valid and return an invalid result.
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if (result.is_valid() && !result.reg().is_byte_register()) {
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result.Unuse();
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return Result();
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}
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return result;
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}
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} } // namespace v8::internal
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