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/*
* Copyright (C) 2011 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``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 APPLE INC. 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.
*/
#include "config.h"
#include "DFGGraph.h"
#include "CodeBlock.h"
#if ENABLE(DFG_JIT)
namespace JSC { namespace DFG {
#ifndef NDEBUG
// Creates an array of stringized names.
static const char* dfgOpNames[] = {
#define STRINGIZE_DFG_OP_ENUM(opcode, flags) #opcode ,
FOR_EACH_DFG_OP(STRINGIZE_DFG_OP_ENUM)
#undef STRINGIZE_DFG_OP_ENUM
};
void Graph::dump(NodeIndex nodeIndex, CodeBlock* codeBlock)
{
Node& node = at(nodeIndex);
NodeType op = node.op;
unsigned refCount = node.refCount;
if (!refCount)
return;
bool mustGenerate = node.mustGenerate();
if (mustGenerate)
--refCount;
// Example/explanation of dataflow dump output
//
// 14: <!2:7> GetByVal(@3, @13)
// ^1 ^2 ^3 ^4 ^5
//
// (1) The nodeIndex of this operation.
// (2) The reference count. The number printed is the 'real' count,
// not including the 'mustGenerate' ref. If the node is
// 'mustGenerate' then the count it prefixed with '!'.
// (3) The virtual register slot assigned to this node.
// (4) The name of the operation.
// (5) The arguments to the operation. The may be of the form:
// @# - a NodeIndex referencing a prior node in the graph.
// arg# - an argument number.
// $# - the index in the CodeBlock of a constant { for numeric constants the value is displayed | for integers, in both decimal and hex }.
// id# - the index in the CodeBlock of an identifier { if codeBlock is passed to dump(), the string representation is displayed }.
// var# - the index of a var on the global object, used by GetGlobalVar/PutGlobalVar operations.
printf("% 4d:\t<%c%u:%u>\t%s(", (int)nodeIndex, mustGenerate ? '!' : ' ', refCount, node.virtualRegister, dfgOpNames[op & NodeIdMask]);
if (node.child1 != NoNode)
printf("@%u", node.child1);
if (node.child2 != NoNode)
printf(", @%u", node.child2);
if (node.child3 != NoNode)
printf(", @%u", node.child3);
bool hasPrinted = node.child1 != NoNode;
if (node.hasVarNumber()) {
printf("%svar%u", hasPrinted ? ", " : "", node.varNumber());
hasPrinted = true;
}
if (node.hasIdentifier()) {
if (codeBlock)
printf("%sid%u{%s}", hasPrinted ? ", " : "", node.identifierNumber(), codeBlock->identifier(node.identifierNumber()).ustring().utf8().data());
else
printf("%sid%u", hasPrinted ? ", " : "", node.identifierNumber());
hasPrinted = true;
}
if (node.hasLocal()) {
int local = node.local();
if (local < 0)
printf("%sarg%u", hasPrinted ? ", " : "", local - codeBlock->thisRegister());
else
printf("%sr%u", hasPrinted ? ", " : "", local);
hasPrinted = true;
}
if (op == Int32Constant) {
printf("%s$%u{%d|0x%08x}", hasPrinted ? ", " : "", node.constantNumber(), node.int32Constant(), node.int32Constant());
hasPrinted = true;
}
if (op == DoubleConstant) {
printf("%s$%u{%f})", hasPrinted ? ", " : "", node.constantNumber(), node.numericConstant());
hasPrinted = true;
}
if (op == JSConstant) {
printf("%s$%u", hasPrinted ? ", " : "", node.constantNumber());
hasPrinted = true;
}
if (node.isBranch() || node.isJump()) {
printf("%sT:#%u", hasPrinted ? ", " : "", blockIndexForBytecodeOffset(node.takenBytecodeOffset()));
hasPrinted = true;
}
if (node.isBranch()) {
printf("%sF:#%u", hasPrinted ? ", " : "", blockIndexForBytecodeOffset(node.notTakenBytecodeOffset()));
hasPrinted = true;
}
printf(")\n");
}
void Graph::dump(CodeBlock* codeBlock)
{
for (size_t b = 0; b < m_blocks.size(); ++b) {
printf("Block #%u:\n", (int)b);
BasicBlock& block = m_blocks[b];
for (size_t i = block.begin; i < block.end; ++i)
dump(i, codeBlock);
}
}
#endif
// FIXME: Convert these methods to be iterative, not recursive.
void Graph::refChildren(NodeIndex op)
{
Node& node = at(op);
if (node.child1 == NoNode) {
ASSERT(node.child2 == NoNode && node.child3 == NoNode);
return;
}
ref(node.child1);
if (node.child2 == NoNode) {
ASSERT(node.child3 == NoNode);
return;
}
ref(node.child2);
if (node.child3 == NoNode)
return;
ref(node.child3);
}
void Graph::derefChildren(NodeIndex op)
{
Node& node = at(op);
if (node.child1 == NoNode) {
ASSERT(node.child2 == NoNode && node.child3 == NoNode);
return;
}
deref(node.child1);
if (node.child2 == NoNode) {
ASSERT(node.child3 == NoNode);
return;
}
deref(node.child2);
if (node.child3 == NoNode)
return;
deref(node.child3);
}
} } // namespace JSC::DFG
#endif
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