1 //===- PromoteMemToReg.h - Promote Allocas to Scalars -----------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This file exposes an interface to promote alloca instructions to SSA 11 // registers, by using the SSA construction algorithm. 12 // 13 //===----------------------------------------------------------------------===// 14 15 #ifndef TRANSFORMS_UTILS_PROMOTEMEMTOREG_H 16 #define TRANSFORMS_UTILS_PROMOTEMEMTOREG_H 17 18 #include <vector> 19 20 namespace llvm { 21 22 class AllocaInst; 23 class DominatorTree; 24 class DominanceFrontier; 25 class AliasSetTracker; 26 27 /// isAllocaPromotable - Return true if this alloca is legal for promotion. 28 /// This is true if there are only loads and stores to the alloca... 29 /// 30 bool isAllocaPromotable(const AllocaInst *AI); 31 32 /// PromoteMemToReg - Promote the specified list of alloca instructions into 33 /// scalar registers, inserting PHI nodes as appropriate. This function makes 34 /// use of DominanceFrontier information. This function does not modify the CFG 35 /// of the function at all. All allocas must be from the same function. 36 /// 37 /// If AST is specified, the specified tracker is updated to reflect changes 38 /// made to the IR. 39 /// 40 void PromoteMemToReg(const std::vector<AllocaInst*> &Allocas, 41 DominatorTree &DT, AliasSetTracker *AST = 0); 42 43 } // End llvm namespace 44 45 #endif 46
