Subzero: Initial implementation of multithreaded translation.

src/IceTargetLoweringX8632.cpp

 //===- subzero/src/IceTargetLoweringX8632.cpp - x86-32 lowering -----------===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
 // This file implements the TargetLoweringX8632 class, which
@@ skipping 879 matching lines @@
   this->FrameSizeLocals = NextStackOffset - SpillAreaPaddingBytes;
   this->HasComputedFrame = true;
 
   // Assign stack offsets to variables that have been linked to spilled
   // variables.
   for (Variable *Var : VariablesLinkedToSpillSlots) {
     Variable *Linked = (llvm::cast<SpillVariable>(Var))->getLinkedTo();
     Var->setStackOffset(Linked->getStackOffset());
   }
 
-  if (ALLOW_DUMP && Func->getContext()->isVerbose(IceV_Frame)) {
+  if (ALLOW_DUMP && Func->isVerbose(IceV_Frame)) {
     OstreamLocker L(Func->getContext());
     Ostream &Str = Func->getContext()->getStrDump();
 
     Str << "Stack layout:\n";
     uint32_t EspAdjustmentPaddingSize =
         SpillAreaSizeBytes - LocalsSpillAreaSize -
         GlobalsAndSubsequentPaddingSize - SpillAreaPaddingBytes;
     Str << " in-args = " << InArgsSizeBytes << " bytes\n"
         << " return address = " << X86_RET_IP_SIZE_BYTES << " bytes\n"
         << " preserved registers = " << PreservedRegsSizeBytes << " bytes\n"
@@ skipping 74 matching lines @@
   typedef ConstantDouble IceType;
   static const Type Ty = IceType_f64;
   static const char *TypeName;
   static const char *AsmTag;
   static const char *PrintfString;
 };
 const char *PoolTypeConverter<double>::TypeName = "double";
 const char *PoolTypeConverter<double>::AsmTag = ".quad";
 const char *PoolTypeConverter<double>::PrintfString = "0x%llx";
 
-template <typename T> void TargetX8632::emitConstantPool() const {
+template <typename T> void TargetX8632::emitConstantPool(GlobalContext *Ctx) {
   // Note: Still used by emit IAS.
   Ostream &Str = Ctx->getStrEmit();
   Type Ty = T::Ty;
   SizeT Align = typeAlignInBytes(Ty);
   ConstantList Pool = Ctx->getConstantPool(Ty);
 
   Str << "\t.section\t.rodata.cst" << Align << ",\"aM\",@progbits," << Align
       << "\n";
   Str << "\t.align\t" << Align << "\n";
   for (Constant *C : Pool) {
     typename T::IceType *Const = llvm::cast<typename T::IceType>(C);
     typename T::IceType::PrimType Value = Const->getValue();
     // Use memcpy() to copy bits from Value into RawValue in a way
     // that avoids breaking strict-aliasing rules.
     typename T::PrimitiveIntType RawValue;
     memcpy(&RawValue, &Value, sizeof(Value));
     char buf[30];
     int CharsPrinted =
         snprintf(buf, llvm::array_lengthof(buf), T::PrintfString, RawValue);
     assert(CharsPrinted >= 0 &&
            (size_t)CharsPrinted < llvm::array_lengthof(buf));
     (void)CharsPrinted; // avoid warnings if asserts are disabled
     Const->emitPoolLabel(Str);
     Str << ":\n\t" << T::AsmTag << "\t" << buf << "\t# " << T::TypeName << " "
         << Value << "\n";
   }
 }
 
-void TargetX8632::emitConstants() const {
+void TargetX8632::emitConstants(GlobalContext *Ctx) {
   // No need to emit constants from the int pool since (for x86) they
   // are embedded as immediates in the instructions, just emit float/double.
   if (Ctx->getFlags().UseELFWriter) {
     ELFObjectWriter *Writer = Ctx->getObjectWriter();
     Writer->writeConstantPool<ConstantFloat>(IceType_f32);
     Writer->writeConstantPool<ConstantDouble>(IceType_f64);
   } else {
     OstreamLocker L(Ctx);
-    emitConstantPool<PoolTypeConverter<float>>();
-    emitConstantPool<PoolTypeConverter<double>>();
+    emitConstantPool<PoolTypeConverter<float>>(Ctx);
+    emitConstantPool<PoolTypeConverter<double>>(Ctx);
   }
 }
 
 void TargetX8632::split64(Variable *Var) {
   switch (Var->getType()) {
   default:
     return;
   case IceType_i64:
   // TODO: Only consider F64 if we need to push each half when
   // passing as an argument to a function call.  Note that each half
@@ skipping 2515 matching lines @@
     return (Arith->getOp() == InstArithmetic::Add);
   }
   return false;
 }
 
 void dumpAddressOpt(const Cfg *Func, const Variable *Base,
                     const Variable *Index, uint16_t Shift, int32_t Offset,
                     const Inst *Reason) {
   if (!ALLOW_DUMP)
     return;
-  if (!Func->getContext()->isVerbose(IceV_AddrOpt))
+  if (!Func->isVerbose(IceV_AddrOpt))
     return;
   OstreamLocker L(Func->getContext());
   Ostream &Str = Func->getContext()->getStrDump();
   Str << "Instruction: ";
   Reason->dumpDecorated(Func);
   Str << "  results in Base=";
   if (Base)
     Base->dump(Func);
   else
     Str << "<null>";
@@ skipping 152 matching lines @@
     Offset += MoreOffset;
     Reason = BaseInst;
     return true;
   }
   return false;
 }
 
 void computeAddressOpt(Cfg *Func, const Inst *Instr, Variable *&Base,
                        Variable *&Index, uint16_t &Shift, int32_t &Offset) {
   Func->resetCurrentNode();
-  if (Func->getContext()->isVerbose(IceV_AddrOpt)) {
+  if (Func->isVerbose(IceV_AddrOpt)) {
     OstreamLocker L(Func->getContext());
     Ostream &Str = Func->getContext()->getStrDump();
     Str << "\nStarting computeAddressOpt for instruction:\n  ";
     Instr->dumpDecorated(Func);
   }
   (void)Offset; // TODO: pattern-match for non-zero offsets.
   if (Base == nullptr)
     return;
   // If the Base has more than one use or is live across multiple
   // blocks, then don't go further.  Alternatively (?), never consider
@@ skipping 821 matching lines @@
     RegisterList Shuffled(List);
     std::random_shuffle(Shuffled.begin(), Shuffled.end(), RNG);
     for (size_t SI = 0, SE = Shuffled.size(); SI < SE; ++SI) {
       Permutation[List[SI]] = Shuffled[SI];
       ++NumShuffled;
     }
   }
 
   assert(NumShuffled + NumPreserved == RegX8632::Reg_NUM);
 
-  if (Func->getContext()->isVerbose(IceV_Random)) {
+  if (Func->isVerbose(IceV_Random)) {
     OstreamLocker L(Func->getContext());
     Ostream &Str = Func->getContext()->getStrDump();
     Str << "Register equivalence classes:\n";
     for (auto I : EquivalenceClasses) {
       Str << "{";
       const RegisterList &List = I.second;
       bool First = true;
       for (int32_t Register : List) {
         if (!First)
           Str << " ";
@@ skipping 127 matching lines @@
   } else if (IsConstant || IsExternal)
     Str << "\t.zero\t" << Size << "\n";
   // Size is part of .comm.
 
   if (IsConstant || HasNonzeroInitializer || IsExternal)
     Str << "\t.size\t" << MangledName << ", " << Size << "\n";
   // Size is part of .comm.
 }
 
 } // end of namespace Ice