e928c9d52b
BUG= Review URL: https://codereview.chromium.org/951553005 Cr-Commit-Position: refs/heads/master@{#26859}
34 lines
1.1 KiB
C++
34 lines
1.1 KiB
C++
// Copyright 2014 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef V8_COMPILER_JUMP_THREADING_H_
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#define V8_COMPILER_JUMP_THREADING_H_
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#include "src/compiler/instruction.h"
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namespace v8 {
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namespace internal {
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namespace compiler {
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// Forwards jumps to empty basic blocks that end with a second jump to the
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// destination of the second jump, transitively.
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class JumpThreading {
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public:
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// Compute the forwarding map of basic blocks to their ultimate destination.
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// Returns {true} if there is at least one block that is forwarded.
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static bool ComputeForwarding(Zone* local_zone, ZoneVector<RpoNumber>& result,
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InstructionSequence* code);
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// Rewrite the instructions to forward jumps and branches.
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// May also negate some branches.
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static void ApplyForwarding(ZoneVector<RpoNumber>& forwarding,
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InstructionSequence* code);
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};
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} // namespace compiler
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} // namespace internal
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} // namespace v8
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#endif // V8_COMPILER_JUMP_THREADING_H
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