kmillikin@google.com
ef0580c26a
Branch optimization pushes some branches that test the value of a phi to the predecessor blocks. This can avoid materializing a boolean object solely for the purposes of branching on its boolean value. The optimization is performed after inlinining which creates opportunities, and before constant propagation, because it exposes opportunities for unreachable code elimination. R=vegorov@google.com BUG= Review URL: https://codereview.chromium.org//12540002 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@19682 260f80e4-7a28-3924-810f-c04153c831b5
69 lines
2.1 KiB
C++
69 lines
2.1 KiB
C++
// Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#ifndef VM_IL_PRINTER_H_
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#define VM_IL_PRINTER_H_
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#include "vm/flow_graph.h"
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#include "vm/intermediate_language.h"
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namespace dart {
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class BufferFormatter : public ValueObject {
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public:
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BufferFormatter(char* buffer, intptr_t size)
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: position_(0),
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buffer_(buffer),
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size_(size) { }
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void VPrint(const char* format, va_list args);
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void Print(const char* format, ...) PRINTF_ATTRIBUTE(2, 3);
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private:
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intptr_t position_;
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char* buffer_;
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const intptr_t size_;
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DISALLOW_COPY_AND_ASSIGN(BufferFormatter);
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};
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class ParsedFunction;
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// Graph printing.
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class FlowGraphPrinter : public ValueObject {
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public:
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FlowGraphPrinter(const FlowGraph& flow_graph,
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bool print_locations = false)
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: function_(flow_graph.parsed_function().function()),
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block_order_(flow_graph.reverse_postorder()),
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print_locations_(print_locations) { }
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// Print the instructions in a block terminated by newlines. Add "goto N"
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// to the end of the block if it ends with an unconditional jump to
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// another block and that block is not next in reverse postorder.
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void PrintBlocks();
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void PrintInstruction(Instruction* instr);
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static void PrintOneInstruction(Instruction* instr, bool print_locations);
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static void PrintTypeCheck(const ParsedFunction& parsed_function,
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intptr_t token_pos,
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Value* value,
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const AbstractType& dst_type,
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const String& dst_name,
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bool eliminated);
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static void PrintBlock(BlockEntryInstr* block, bool print_locations);
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static void PrintGraph(const char* phase, FlowGraph* flow_graph);
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private:
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const Function& function_;
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const GrowableArray<BlockEntryInstr*>& block_order_;
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const bool print_locations_;
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};
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} // namespace dart
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#endif // VM_IL_PRINTER_H_
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