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Diffstat (limited to 'src/3rdparty/v8/src/virtual-frame-light-inl.h')
| -rw-r--r-- | src/3rdparty/v8/src/virtual-frame-light-inl.h | 171 |
1 files changed, 171 insertions, 0 deletions
diff --git a/src/3rdparty/v8/src/virtual-frame-light-inl.h b/src/3rdparty/v8/src/virtual-frame-light-inl.h new file mode 100644 index 0000000..681f93f --- /dev/null +++ b/src/3rdparty/v8/src/virtual-frame-light-inl.h @@ -0,0 +1,171 @@ +// Copyright 2010 the V8 project authors. All rights reserved. +// Redistribution and use in source and binary forms, with or without +// modification, are permitted provided that the following conditions are +// met: +// +// * Redistributions of source code must retain the above copyright +// notice, this list of conditions and the following disclaimer. +// * Redistributions in binary form must reproduce the above +// copyright notice, this list of conditions and the following +// disclaimer in the documentation and/or other materials provided +// with the distribution. +// * Neither the name of Google Inc. nor the names of its +// contributors may be used to endorse or promote products derived +// from this software without specific prior written permission. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +#ifndef V8_VIRTUAL_FRAME_LIGHT_INL_H_ +#define V8_VIRTUAL_FRAME_LIGHT_INL_H_ + +#include "codegen.h" +#include "register-allocator.h" +#include "scopes.h" +#include "type-info.h" + +#include "codegen-inl.h" +#include "jump-target-light-inl.h" + +namespace v8 { +namespace internal { + +VirtualFrame::VirtualFrame(InvalidVirtualFrameInitializer* dummy) + : element_count_(0), + top_of_stack_state_(NO_TOS_REGISTERS), + register_allocation_map_(0), + tos_known_smi_map_(0) { } + + +// On entry to a function, the virtual frame already contains the receiver, +// the parameters, and a return address. All frame elements are in memory. +VirtualFrame::VirtualFrame() + : element_count_(parameter_count() + 2), + top_of_stack_state_(NO_TOS_REGISTERS), + register_allocation_map_(0), + tos_known_smi_map_(0) { } + + +// When cloned, a frame is a deep copy of the original. +VirtualFrame::VirtualFrame(VirtualFrame* original) + : element_count_(original->element_count()), + top_of_stack_state_(original->top_of_stack_state_), + register_allocation_map_(original->register_allocation_map_), + tos_known_smi_map_(0) { } + + +bool VirtualFrame::Equals(const VirtualFrame* other) { + ASSERT(element_count() == other->element_count()); + if (top_of_stack_state_ != other->top_of_stack_state_) return false; + if (register_allocation_map_ != other->register_allocation_map_) return false; + if (tos_known_smi_map_ != other->tos_known_smi_map_) return false; + + return true; +} + + +void VirtualFrame::PrepareForReturn() { + // Don't bother flushing tos registers as returning does not require more + // access to the expression stack. + top_of_stack_state_ = NO_TOS_REGISTERS; +} + + +VirtualFrame::RegisterAllocationScope::RegisterAllocationScope( + CodeGenerator* cgen) + : cgen_(cgen), + old_is_spilled_( + Isolate::Current()->is_virtual_frame_in_spilled_scope()) { + Isolate::Current()->set_is_virtual_frame_in_spilled_scope(false); + if (old_is_spilled_) { + VirtualFrame* frame = cgen->frame(); + if (frame != NULL) { + frame->AssertIsSpilled(); + } + } +} + + +VirtualFrame::RegisterAllocationScope::~RegisterAllocationScope() { + Isolate::Current()->set_is_virtual_frame_in_spilled_scope(old_is_spilled_); + if (old_is_spilled_) { + VirtualFrame* frame = cgen_->frame(); + if (frame != NULL) { + frame->SpillAll(); + } + } +} + + +CodeGenerator* VirtualFrame::cgen() const { + return CodeGeneratorScope::Current(Isolate::Current()); +} + + +MacroAssembler* VirtualFrame::masm() { return cgen()->masm(); } + + +void VirtualFrame::CallStub(CodeStub* stub, int arg_count) { + if (arg_count != 0) Forget(arg_count); + ASSERT(cgen()->HasValidEntryRegisters()); + masm()->CallStub(stub); +} + + +int VirtualFrame::parameter_count() const { + return cgen()->scope()->num_parameters(); +} + + +int VirtualFrame::local_count() const { + return cgen()->scope()->num_stack_slots(); +} + + +int VirtualFrame::frame_pointer() const { return parameter_count() + 3; } + + +int VirtualFrame::context_index() { return frame_pointer() - 1; } + + +int VirtualFrame::function_index() { return frame_pointer() - 2; } + + +int VirtualFrame::local0_index() const { return frame_pointer() + 2; } + + +int VirtualFrame::fp_relative(int index) { + ASSERT(index < element_count()); + ASSERT(frame_pointer() < element_count()); // FP is on the frame. + return (frame_pointer() - index) * kPointerSize; +} + + +int VirtualFrame::expression_base_index() const { + return local0_index() + local_count(); +} + + +int VirtualFrame::height() const { + return element_count() - expression_base_index(); +} + + +MemOperand VirtualFrame::LocalAt(int index) { + ASSERT(0 <= index); + ASSERT(index < local_count()); + return MemOperand(fp, kLocal0Offset - index * kPointerSize); +} + +} } // namespace v8::internal + +#endif // V8_VIRTUAL_FRAME_LIGHT_INL_H_ |