ftl/FTLOutput.cpp

   1 /*
   2  * Copyright (C) 2013 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 "FTLOutput.h"
  28
  29 #if ENABLE(FTL_JIT)
  30
  31 namespace JSC { namespace FTL {
  32
  33 Output::Output(LContext context)
  34     : IntrinsicRepository(context)
  35     , m_function(0)
  36     , m_heaps(0)
  37     , m_builder(llvm->CreateBuilderInContext(m_context))
  38     , m_block(0)
  39     , m_nextBlock(0)
  40 {
  41 }
  42
  43 Output::~Output()
  44 {
  45     llvm->DisposeBuilder(m_builder);
  46 }
  47
  48 void Output::initialize(LModule module, LValue function, AbstractHeapRepository& heaps)
  49 {
  50     IntrinsicRepository::initialize(module);
  51     m_function = function;
  52     m_heaps = &heaps;
  53 }
  54
  55 LBasicBlock Output::appendTo(LBasicBlock block, LBasicBlock nextBlock)
  56 {
  57     appendTo(block);
  58     return insertNewBlocksBefore(nextBlock);
  59 }
  60
  61 void Output::appendTo(LBasicBlock block)
  62 {
  63     m_block = block;
  64
  65     llvm->PositionBuilderAtEnd(m_builder, block);
  66 }
  67
  68 LBasicBlock Output::newBlock(const char* name)
  69 {
  70     if (!m_nextBlock)
  71         return appendBasicBlock(m_context, m_function, name);
  72     return insertBasicBlock(m_context, m_nextBlock, name);
  73 }
  74
  75 LValue Output::sensibleDoubleToInt(LValue value)
  76 {
  77     RELEASE_ASSERT(isX86());
  78     return call(
  79         x86SSE2CvtTSD2SIIntrinsic(),
  80         insertElement(
  81             insertElement(getUndef(vectorType(doubleType, 2)), value, int32Zero),
  82             doubleZero, int32One));
  83 }
  84
  85 LValue Output::load(TypedPointer pointer, LType refType)
  86 {
  87     LValue result = get(intToPtr(pointer.value(), refType));
  88     pointer.heap().decorateInstruction(result, *m_heaps);
  89     return result;
  90 }
  91
  92 void Output::store(LValue value, TypedPointer pointer, LType refType)
  93 {
  94     LValue result = set(value, intToPtr(pointer.value(), refType));
  95     pointer.heap().decorateInstruction(result, *m_heaps);
  96 }
  97
  98 LValue Output::baseIndex(LValue base, LValue index, Scale scale, ptrdiff_t offset)
  99 {
 100     LValue accumulatedOffset;
 101
 102     switch (scale) {
 103     case ScaleOne:
 104         accumulatedOffset = index;
 105         break;
 106     case ScaleTwo:
 107         accumulatedOffset = shl(index, intPtrOne);
 108         break;
 109     case ScaleFour:
 110         accumulatedOffset = shl(index, intPtrTwo);
 111         break;
 112     case ScaleEight:
 113     case ScalePtr:
 114         accumulatedOffset = shl(index, intPtrThree);
 115         break;
 116     }
 117
 118     if (offset)
 119         accumulatedOffset = add(accumulatedOffset, constIntPtr(offset));
 120
 121     return add(base, accumulatedOffset);
 122 }
 123
 124 void Output::branch(LValue condition, LBasicBlock taken, Weight takenWeight, LBasicBlock notTaken, Weight notTakenWeight)
 125 {
 126     LValue branch = buildCondBr(m_builder, condition, taken, notTaken);
 127
 128     if (!takenWeight || !notTakenWeight)
 129         return;
 130
 131     double total = takenWeight.value() + notTakenWeight.value();
 132
 133     setMetadata(
 134         branch, profKind,
 135         mdNode(
 136             m_context, branchWeights,
 137             constInt32(takenWeight.scaleToTotal(total)),
 138             constInt32(notTakenWeight.scaleToTotal(total))));
 139 }
 140
 141 void Output::crashNonTerminal()
 142 {
 143     call(intToPtr(constIntPtr(abort), pointerType(functionType(voidType))));
 144 }
 145
 146 } } // namespace JSC::FTL
 147
 148 #endif // ENABLE(FTL_JIT)
 149