1 //===- PromoteMemToReg.h - Promote Allocas to Scalars -----------*- C++ -*-===//
3 // This file exposes an interface to promote alloca instructions to SSA
4 // registers, by using the SSA construction algorithm.
6 //===----------------------------------------------------------------------===//
8 #ifndef TRANSFORMS_UTILS_PROMOTEMEMTOREG_H
9 #define TRANSFORMS_UTILS_PROMOTEMEMTOREG_H
12 class DominanceFrontier;
15 /// isAllocaPromotable - Return true if this alloca is legal for promotion.
16 /// This is true if there are only loads and stores to the alloca...
18 bool isAllocaPromotable(const AllocaInst *AI);
20 /// PromoteMemToReg - Promote the specified list of alloca instructions into
21 /// scalar registers, inserting PHI nodes as appropriate. This function makes
22 /// use of DominanceFrontier information. This function does not modify the CFG
23 /// of the function at all. All allocas must be from the same function.
25 void PromoteMemToReg(const std::vector<AllocaInst*> &Allocas,
26 DominanceFrontier &DF);