Sort allocas, compute frame pointer in Cfg pass

src/IceTargetLoweringX86Base.h

 //===- subzero/src/IceTargetLoweringX86Base.h - x86 lowering ----*- C++ -*-===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 ///
 /// \file
@@ skipping 65 matching lines @@
   const llvm::SmallBitVector &getRegisterSetForType(Type Ty) const override {
     return TypeToRegisterSet[Ty];
   }
 
   const llvm::SmallBitVector &getAliasesForRegister(SizeT Reg) const override {
     assert(Reg < Traits::RegisterSet::Reg_NUM);
     return RegisterAliases[Reg];
   }
 
   bool hasFramePointer() const override { return IsEbpBasedFrame; }
+  void setHasFramePointer() override { IsEbpBasedFrame = true; }
   SizeT getStackReg() const override { return Traits::RegisterSet::Reg_esp; }
   SizeT getFrameOrStackReg() const override {
     return IsEbpBasedFrame ? Traits::RegisterSet::Reg_ebp
                            : Traits::RegisterSet::Reg_esp;
   }
   size_t typeWidthInBytesOnStack(Type Ty) const override {
     // Round up to the next multiple of WordType bytes.
     const uint32_t WordSizeInBytes = typeWidthInBytes(Traits::WordType);
     return Utils::applyAlignment(typeWidthInBytes(Ty), WordSizeInBytes);
   }
+  uint32_t getStackAlignment() const override {
+    return Traits::X86_STACK_ALIGNMENT_BYTES;
+  }
 
   bool shouldSplitToVariable64On32(Type Ty) const override {
     return Traits::Is64Bit ? false : Ty == IceType_i64;
   }
 
   SizeT getMinJumpTableSize() const override { return 4; }
 
   void emitVariable(const Variable *Var) const override;
 
   const char *getConstantPrefix() const final { return "$"; }
@@ skipping 630 matching lines @@
   lowerIcmp64(const InstIcmp *Icmp, const InstBr *Br);
 
   BoolFolding FoldingInfo;
 };
 } // end of namespace X86Internal
 } // end of namespace Ice
 
 #include "IceTargetLoweringX86BaseImpl.h"
 
 #endif // SUBZERO_SRC_ICETARGETLOWERINGX86BASE_H