Subzero ARM: addProlog/addEpilogue -- share some code with x86.

src/IceTargetLoweringX8632.h

 //===- subzero/src/IceTargetLoweringX8632.h - x86-32 lowering ---*- 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 TargetLoweringX8632 class, which
@@ skipping 102 matching lines @@
   }
   bool hasFramePointer() const override { return IsEbpBasedFrame; }
   SizeT getFrameOrStackReg() const override {
     return IsEbpBasedFrame ? RegX8632::Reg_ebp : RegX8632::Reg_esp;
   }
   size_t typeWidthInBytesOnStack(Type Ty) const override {
     // Round up to the next multiple of 4 bytes.  In particular, i1,
     // i8, and i16 are rounded up to 4 bytes.
     return (typeWidthInBytes(Ty) + 3) & ~3;
   }
+  size_t minStackSlotSizeLog2() const final { return 2; }
+  size_t maxStackSlotSizeLog2() const final { return 4; }
+
   void emitVariable(const Variable *Var) const override;
 
   const char *getConstantPrefix() const final { return "$"; }
   void emit(const ConstantUndef *C) const final;
   void emit(const ConstantInteger32 *C) const final;
   void emit(const ConstantInteger64 *C) const final;
   void emit(const ConstantFloat *C) const final;
   void emit(const ConstantDouble *C) const final;
 
   void lowerArguments() override;
   void initNodeForLowering(CfgNode *Node) override;
   void addProlog(CfgNode *Node) override;
   void addEpilog(CfgNode *Node) override;
   // Ensure that a 64-bit Variable has been split into 2 32-bit
   // Variables, creating them if necessary.  This is needed for all
   // I64 operations, and it is needed for pushing F64 arguments for
   // function calls using the 32-bit push instruction (though the
   // latter could be done by directly writing to the stack).
   void split64(Variable *Var);
+  Operand *loOperand(Operand *Operand);
+  Operand *hiOperand(Operand *Operand);
   void finishArgumentLowering(Variable *Arg, Variable *FramePtr,
                               size_t BasicFrameOffset, size_t &InArgsSizeBytes);
-  Operand *loOperand(Operand *Operand);
-  Operand *hiOperand(Operand *Operand);
   X8632::Address stackVarToAsmOperand(const Variable *Var) const;
 
   enum X86InstructionSet {
     Begin,
     // SSE2 is the PNaCl baseline instruction set.
     SSE2 = Begin,
     SSE4_1,
     End
   };
 
@@ skipping 42 matching lines @@
 
   typedef void (TargetX8632::*LowerBinOp)(Variable *, Operand *);
   void expandAtomicRMWAsCmpxchg(LowerBinOp op_lo, LowerBinOp op_hi,
                                 Variable *Dest, Operand *Ptr, Operand *Val);
 
   void eliminateNextVectorSextInstruction(Variable *SignExtendedResult);
 
   void scalarizeArithmetic(InstArithmetic::OpKind K, Variable *Dest,
                            Operand *Src0, Operand *Src1);
 
-  void sortByAlignment(VarList &Dest, const VarList &Source) const;
-
   // Operand legalization helpers.  To deal with address mode
   // constraints, the helpers will create a new Operand and emit
   // instructions that guarantee that the Operand kind is one of those
   // indicated by the LegalMask (a bitmask of allowed kinds).  If the
   // input Operand is known to already meet the constraints, it may be
   // simply returned as the result, without creating any new
   // instructions or operands.
   enum OperandLegalization {
     Legal_None = 0,
     Legal_Reg = 1 << 0, // physical register, not stack location
@@ skipping 76 matching lines @@
   }
   void _bsf(Variable *Dest, Operand *Src0) {
     Context.insert(InstX8632Bsf::create(Func, Dest, Src0));
   }
   void _bsr(Variable *Dest, Operand *Src0) {
     Context.insert(InstX8632Bsr::create(Func, Dest, Src0));
   }
   void _bswap(Variable *SrcDest) {
     Context.insert(InstX8632Bswap::create(Func, SrcDest));
   }
-  void
-  _bundle_lock(InstBundleLock::Option BundleOption = InstBundleLock::Opt_None) {
-    Context.insert(InstBundleLock::create(Func, BundleOption));
-  }
-  void _bundle_unlock() { Context.insert(InstBundleUnlock::create(Func)); }
   void _cbwdq(Variable *Dest, Operand *Src0) {
     Context.insert(InstX8632Cbwdq::create(Func, Dest, Src0));
   }
   void _cmov(Variable *Dest, Operand *Src0, CondX86::BrCond Condition) {
     Context.insert(InstX8632Cmov::create(Func, Dest, Src0, Condition));
   }
   void _cmp(Operand *Src0, Operand *Src1) {
     Context.insert(InstX8632Icmp::create(Func, Src0, Src1));
   }
   void _cmpps(Variable *Dest, Operand *Src0, CondX86::CmppsCond Condition) {
@@ skipping 276 matching lines @@
 
 private:
   void lowerGlobal(const VariableDeclaration &Var) const;
   ~TargetDataX8632() override {}
   template <typename T> static void emitConstantPool(GlobalContext *Ctx);
 };
 
 } // end of namespace Ice
 
 #endif // SUBZERO_SRC_ICETARGETLOWERINGX8632_H