1 //=- PHIEliminationUtils.h - Helper functions for PHI elimination -*- C++ -*-=// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #ifndef LLVM_LIB_CODEGEN_PHIELIMINATIONUTILS_H 10 #define LLVM_LIB_CODEGEN_PHIELIMINATIONUTILS_H 11 12 #include "llvm/CodeGen/MachineBasicBlock.h" 13 14 namespace llvm { 15 /// findPHICopyInsertPoint - Find a safe place in MBB to insert a copy from 16 /// SrcReg when following the CFG edge to SuccMBB. This needs to be after 17 /// any def of SrcReg, but before any subsequent point where control flow 18 /// might jump out of the basic block. 19 MachineBasicBlock::iterator 20 findPHICopyInsertPoint(MachineBasicBlock* MBB, MachineBasicBlock* SuccMBB, 21 unsigned SrcReg); 22 } 23 24 #endif 25