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

src/IceTargetLoweringX8632.h

Index: src/IceTargetLoweringX8632.h
diff --git a/src/IceTargetLoweringX8632.h b/src/IceTargetLoweringX8632.h
index 4213a595d930c449d101162c4744f369511ac417..129684a8ae3e7f148edb1038e4a3be6b48039c45 100644
--- a/src/IceTargetLoweringX8632.h
+++ b/src/IceTargetLoweringX8632.h
@@ -120,6 +120,9 @@ public:
     // 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 "$"; }
@@ -139,10 +142,10 @@ public:
   // function calls using the 32-bit push instruction (though the
   // latter could be done by directly writing to the stack).
   void split64(Variable *Var);
-  void finishArgumentLowering(Variable *Arg, Variable *FramePtr,
-                              size_t BasicFrameOffset, size_t &InArgsSizeBytes);
   Operand *loOperand(Operand *Operand);
   Operand *hiOperand(Operand *Operand);
+  void finishArgumentLowering(Variable *Arg, Variable *FramePtr,
+                              size_t BasicFrameOffset, size_t &InArgsSizeBytes);
   X8632::Address stackVarToAsmOperand(const Variable *Var) const;
 
   enum X86InstructionSet {
@@ -205,8 +208,6 @@ protected:
   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
@@ -303,11 +304,6 @@ protected:
   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));
   }