Disable Subzero IR generation for performance testing.

src/IceOperand.h

 //===- subzero/src/IceOperand.h - High-level operands -----------*- C++ -*-===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
 // This file declares the Operand class and its target-independent
@@ skipping 119 matching lines @@
 
 // ConstantPrimitive<> wraps a primitive type.
 template <typename T, Operand::OperandKind K>
 class ConstantPrimitive : public Constant {
   ConstantPrimitive(const ConstantPrimitive &) = delete;
   ConstantPrimitive &operator=(const ConstantPrimitive &) = delete;
 
 public:
   static ConstantPrimitive *create(GlobalContext *Ctx, Type Ty, T Value,
                                    uint32_t PoolEntryID) {
+    assert(!Ctx->getFlags().DisableIRGeneration &&
+           "Attempt to build primitive constant when IR generation disabled");
     return new (Ctx->allocate<ConstantPrimitive>())
         ConstantPrimitive(Ty, Value, PoolEntryID);
   }
   T getValue() const { return Value; }
   using Constant::emit;
   // The target needs to implement this for each ConstantPrimitive
   // specialization.
   void emit(GlobalContext *Ctx) const override;
   using Constant::dump;
   void dump(const Cfg *, Ostream &Str) const override { Str << getValue(); }
@@ skipping 49 matching lines @@
 // ConstantRelocatable represents a symbolic constant combined with
 // a fixed offset.
 class ConstantRelocatable : public Constant {
   ConstantRelocatable(const ConstantRelocatable &) = delete;
   ConstantRelocatable &operator=(const ConstantRelocatable &) = delete;
 
 public:
   static ConstantRelocatable *create(GlobalContext *Ctx, Type Ty,
                                      const RelocatableTuple &Tuple,
                                      uint32_t PoolEntryID) {
+    assert(!Ctx->getFlags().DisableIRGeneration &&
+           "Attempt to build relocatable constant when IR generation disabled");
     return new (Ctx->allocate<ConstantRelocatable>()) ConstantRelocatable(
         Ty, Tuple.Offset, Tuple.Name, Tuple.SuppressMangling, PoolEntryID);
   }
 
   RelocOffsetT getOffset() const { return Offset; }
   IceString getName() const { return Name; }
   void setSuppressMangling(bool Value) { SuppressMangling = Value; }
   bool getSuppressMangling() const { return SuppressMangling; }
   using Constant::emit;
   using Constant::dump;
@@ skipping 20 matching lines @@
 // ConstantUndef represents an unspecified bit pattern. Although it is
 // legal to lower ConstantUndef to any value, backends should try to
 // make code generation deterministic by lowering ConstantUndefs to 0.
 class ConstantUndef : public Constant {
   ConstantUndef(const ConstantUndef &) = delete;
   ConstantUndef &operator=(const ConstantUndef &) = delete;
 
 public:
   static ConstantUndef *create(GlobalContext *Ctx, Type Ty,
                                uint32_t PoolEntryID) {
+    assert(!Ctx->getFlags().DisableIRGeneration &&
+           "Attempt to build undefined constant when IR generation disabled");
     return new (Ctx->allocate<ConstantUndef>()) ConstantUndef(Ty, PoolEntryID);
   }
 
   using Constant::emit;
   using Constant::dump;
   // The target needs to implement this.
   void emit(GlobalContext *Ctx) const override;
   void dump(const Cfg *, Ostream &Str) const override { Str << "undef"; }
 
   static bool classof(const Operand *Operand) {
@@ skipping 113 matching lines @@
 // stack-allocated.  If it is register-allocated, it will ultimately
 // have a non-negative RegNum field.
 class Variable : public Operand {
   Variable(const Variable &) = delete;
   Variable &operator=(const Variable &) = delete;
   Variable(Variable &&V) = default;
 
 public:
   static Variable *create(Cfg *Func, Type Ty, SizeT Index,
                           const IceString &Name) {
     return new (Func->allocate<Variable>())

[jvoung (off chromium), 2014/11/04 22:30:15]

Why not have Cfg's makeVariable() also assert?

[Jim Stichnoth, 2014/11/04 23:43:15]

I think the assert in the Cfg ctor dominates this.

[Karl, 2014/11/05 21:13:33]

Since makeVariable is a member function, and the Cfg can't exist (the
constructor does an assert if we have disabled IR generation).

         Variable(kVariable, Ty, Index, Name);
   }
 
   SizeT getIndex() const { return Number; }
   IceString getName() const;
   void setName(IceString &NewName) {
     // Make sure that the name can only be set once.
     assert(Name.empty());
     Name = NewName;
   }
@@ skipping 234 matching lines @@
 private:
   const Cfg *Func;
   MetadataKind Kind;
   std::vector<VariableTracking> Metadata;
   const static InstDefList NoDefinitions;
 };
 
 } // end of namespace Ice
 
 #endif // SUBZERO_SRC_ICEOPERAND_H