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Diffstat (limited to 'src/3rdparty/v8/src/ia32/lithium-gap-resolver-ia32.h')
-rw-r--r-- | src/3rdparty/v8/src/ia32/lithium-gap-resolver-ia32.h | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/src/3rdparty/v8/src/ia32/lithium-gap-resolver-ia32.h b/src/3rdparty/v8/src/ia32/lithium-gap-resolver-ia32.h new file mode 100644 index 0000000..0c81d72 --- /dev/null +++ b/src/3rdparty/v8/src/ia32/lithium-gap-resolver-ia32.h @@ -0,0 +1,110 @@ +// Copyright 2011 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_IA32_LITHIUM_GAP_RESOLVER_IA32_H_ +#define V8_IA32_LITHIUM_GAP_RESOLVER_IA32_H_ + +#include "v8.h" + +#include "lithium.h" + +namespace v8 { +namespace internal { + +class LCodeGen; +class LGapResolver; + +class LGapResolver BASE_EMBEDDED { + public: + explicit LGapResolver(LCodeGen* owner); + + // Resolve a set of parallel moves, emitting assembler instructions. + void Resolve(LParallelMove* parallel_move); + + private: + // Build the initial list of moves. + void BuildInitialMoveList(LParallelMove* parallel_move); + + // Perform the move at the moves_ index in question (possibly requiring + // other moves to satisfy dependencies). + void PerformMove(int index); + + // Emit any code necessary at the end of a gap move. + void Finish(); + + // Add or delete a move from the move graph without emitting any code. + // Used to build up the graph and remove trivial moves. + void AddMove(LMoveOperands move); + void RemoveMove(int index); + + // Report the count of uses of operand as a source in a not-yet-performed + // move. Used to rebuild use counts. + int CountSourceUses(LOperand* operand); + + // Emit a move and remove it from the move graph. + void EmitMove(int index); + + // Execute a move by emitting a swap of two operands. The move from + // source to destination is removed from the move graph. + void EmitSwap(int index); + + // Ensure that the given operand is not spilled. + void EnsureRestored(LOperand* operand); + + // Return a register that can be used as a temp register, spilling + // something if necessary. + Register EnsureTempRegister(); + + // Return a known free register different from the given one (which could + // be no_reg---returning any free register), or no_reg if there is no such + // register. + Register GetFreeRegisterNot(Register reg); + + // Verify that the state is the initial one, ready to resolve a single + // parallel move. + bool HasBeenReset(); + + // Verify the move list before performing moves. + void Verify(); + + LCodeGen* cgen_; + + // List of moves not yet resolved. + ZoneList<LMoveOperands> moves_; + + // Source and destination use counts for the general purpose registers. + int source_uses_[Register::kNumAllocatableRegisters]; + int destination_uses_[Register::kNumAllocatableRegisters]; + + // If we had to spill on demand, the currently spilled register's + // allocation index. + int spilled_register_; +}; + +} } // namespace v8::internal + +#endif // V8_IA32_LITHIUM_GAP_RESOLVER_IA32_H_ |