1 //===- PromoteMemToReg.h - Promote Allocas to Scalars -----------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file exposes an interface to promote alloca instructions to SSA
11 // registers, by using the SSA construction algorithm.
13 //===----------------------------------------------------------------------===//
15 #ifndef TRANSFORMS_UTILS_PROMOTEMEMTOREG_H
16 #define TRANSFORMS_UTILS_PROMOTEMEMTOREG_H
24 class DominanceFrontier;
25 class AliasSetTracker;
28 /// isAllocaPromotable - Return true if this alloca is legal for promotion.
29 /// This is true if there are only loads and stores to the alloca...
31 bool isAllocaPromotable(const AllocaInst *AI);
33 /// PromoteMemToReg - Promote the specified list of alloca instructions into
34 /// scalar registers, inserting PHI nodes as appropriate. This function makes
35 /// use of DominanceFrontier information. This function does not modify the CFG
36 /// of the function at all. All allocas must be from the same function.
38 /// If AST is specified, the specified tracker is updated to reflect changes
41 void PromoteMemToReg(const std::vector<AllocaInst*> &Allocas,
42 DominatorTree &DT, DominanceFrontier &DF,
44 AliasSetTracker *AST = 0);
46 } // End llvm namespace