dfg/DFGDriver.cpp

   1 /*
   2  * Copyright (C) 2011 Apple Inc. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
  14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
  17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25
  26 #include "config.h"
  27 #include "DFGDriver.h"
  28
  29 #if ENABLE(DFG_JIT)
  30
  31 #include "DFGByteCodeParser.h"
  32 #include "DFGCFAPhase.h"
  33 #include "DFGCSEPhase.h"
  34 #include "DFGFixupPhase.h"
  35 #include "DFGJITCompiler.h"
  36 #include "DFGPredictionPropagationPhase.h"
  37 #include "DFGRedundantPhiEliminationPhase.h"
  38 #include "DFGVirtualRegisterAllocationPhase.h"
  39
  40 namespace JSC { namespace DFG {
  41
  42 enum CompileMode { CompileFunction, CompileOther };
  43 inline bool compile(CompileMode compileMode, JSGlobalData& globalData, CodeBlock* codeBlock, JITCode& jitCode, MacroAssemblerCodePtr* jitCodeWithArityCheck)
  44 {
  45     SamplingRegion samplingRegion("DFG Compilation (Driver)");
  46
  47     ASSERT(codeBlock);
  48     ASSERT(codeBlock->alternative());
  49     ASSERT(codeBlock->alternative()->getJITType() == JITCode::BaselineJIT);
  50
  51 #if DFG_ENABLE(DEBUG_VERBOSE)
  52     dataLog("DFG compiling code block %p(%p), number of instructions = %u.\n", codeBlock, codeBlock->alternative(), codeBlock->instructionCount());
  53 #endif
  54
  55     Graph dfg(globalData, codeBlock);
  56     if (!parse(dfg))
  57         return false;
  58
  59     if (compileMode == CompileFunction)
  60         dfg.predictArgumentTypes();
  61
  62     performRedundantPhiElimination(dfg);
  63     performPredictionPropagation(dfg);
  64     performFixup(dfg);
  65     performCSE(dfg);
  66     performVirtualRegisterAllocation(dfg);
  67     performCFA(dfg);
  68
  69 #if DFG_ENABLE(DEBUG_VERBOSE)
  70     dataLog("Graph after optimization:\n");
  71     dfg.dump();
  72 #endif
  73
  74     JITCompiler dataFlowJIT(dfg);
  75     bool result;
  76     if (compileMode == CompileFunction) {
  77         ASSERT(jitCodeWithArityCheck);
  78
  79         result = dataFlowJIT.compileFunction(jitCode, *jitCodeWithArityCheck);
  80     } else {
  81         ASSERT(compileMode == CompileOther);
  82         ASSERT(!jitCodeWithArityCheck);
  83
  84         result = dataFlowJIT.compile(jitCode);
  85     }
  86
  87     return result;
  88 }
  89
  90 bool tryCompile(JSGlobalData& globalData, CodeBlock* codeBlock, JITCode& jitCode)
  91 {
  92     return compile(CompileOther, globalData, codeBlock, jitCode, 0);
  93 }
  94
  95 bool tryCompileFunction(JSGlobalData& globalData, CodeBlock* codeBlock, JITCode& jitCode, MacroAssemblerCodePtr& jitCodeWithArityCheck)
  96 {
  97     return compile(CompileFunction, globalData, codeBlock, jitCode, &jitCodeWithArityCheck);
  98 }
  99
 100 } } // namespace JSC::DFG
 101
 102 #endif // ENABLE(DFG_JIT)
 103