c2c6b2813d
- Use V8_FINAL and V8_OVERRIDE in Ast classes. - Use V8_FINAL and V8_OVERRIDE in Lithium mips backend. - Use V8_FINAL and V8_OVERRIDE in Lithium arm backend. - Use V8_FINAL and V8_OVERRIDE in Lithium x64 backend. - Use V8_FINAL and V8_OVERRIDE in Lithium ia32 backend. - Use V8_FINAL and V8_OVERRIDE in Lithium classes. - Use V8_FINAL and V8_OVERRIDE in Hydrogen classes. TBR=dslomov@chromium.org Review URL: https://codereview.chromium.org/22796020 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16244 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
111 lines
4.0 KiB
C++
111 lines
4.0 KiB
C++
// Copyright 2011 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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#ifndef V8_IA32_LITHIUM_GAP_RESOLVER_IA32_H_
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#define V8_IA32_LITHIUM_GAP_RESOLVER_IA32_H_
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#include "v8.h"
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#include "lithium.h"
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namespace v8 {
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namespace internal {
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class LCodeGen;
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class LGapResolver;
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class LGapResolver V8_FINAL BASE_EMBEDDED {
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public:
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explicit LGapResolver(LCodeGen* owner);
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// Resolve a set of parallel moves, emitting assembler instructions.
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void Resolve(LParallelMove* parallel_move);
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private:
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// Build the initial list of moves.
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void BuildInitialMoveList(LParallelMove* parallel_move);
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// Perform the move at the moves_ index in question (possibly requiring
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// other moves to satisfy dependencies).
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void PerformMove(int index);
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// Emit any code necessary at the end of a gap move.
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void Finish();
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// Add or delete a move from the move graph without emitting any code.
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// Used to build up the graph and remove trivial moves.
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void AddMove(LMoveOperands move);
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void RemoveMove(int index);
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// Report the count of uses of operand as a source in a not-yet-performed
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// move. Used to rebuild use counts.
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int CountSourceUses(LOperand* operand);
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// Emit a move and remove it from the move graph.
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void EmitMove(int index);
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// Execute a move by emitting a swap of two operands. The move from
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// source to destination is removed from the move graph.
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void EmitSwap(int index);
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// Ensure that the given operand is not spilled.
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void EnsureRestored(LOperand* operand);
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// Return a register that can be used as a temp register, spilling
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// something if necessary.
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Register EnsureTempRegister();
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// Return a known free register different from the given one (which could
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// be no_reg---returning any free register), or no_reg if there is no such
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// register.
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Register GetFreeRegisterNot(Register reg);
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// Verify that the state is the initial one, ready to resolve a single
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// parallel move.
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bool HasBeenReset();
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// Verify the move list before performing moves.
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void Verify();
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LCodeGen* cgen_;
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// List of moves not yet resolved.
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ZoneList<LMoveOperands> moves_;
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// Source and destination use counts for the general purpose registers.
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int source_uses_[Register::kMaxNumAllocatableRegisters];
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int destination_uses_[Register::kMaxNumAllocatableRegisters];
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// If we had to spill on demand, the currently spilled register's
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// allocation index.
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int spilled_register_;
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};
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} } // namespace v8::internal
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#endif // V8_IA32_LITHIUM_GAP_RESOLVER_IA32_H_
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