1 //===- SCCP.cpp - Sparse Conditional Constant Propagation -------*- 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 // \file 10 // This file implements sparse conditional constant propagation and merging: 11 // 12 // Specifically, this: 13 // * Assumes values are constant unless proven otherwise 14 // * Assumes BasicBlocks are dead unless proven otherwise 15 // * Proves values to be constant, and replaces them with constants 16 // * Proves conditional branches to be unconditional 17 // 18 //===----------------------------------------------------------------------===// 19 20 #ifndef LLVM_TRANSFORMS_SCALAR_SCCP_H 21 #define LLVM_TRANSFORMS_SCALAR_SCCP_H 22 23 #include "llvm/ADT/STLFunctionalExtras.h" 24 #include "llvm/IR/PassManager.h" 25 26 #include <functional> 27 28 namespace llvm { 29 class AssumptionCache; 30 class DataLayout; 31 class Function; 32 class Module; 33 class TargetLibraryInfo; 34 class TargetTransformInfo; 35 struct AnalysisResultsForFn; 36 37 /// This pass performs function-level constant propagation and merging. 38 class SCCPPass : public PassInfoMixin<SCCPPass> { 39 public: 40 PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM); 41 }; 42 43 } // end namespace llvm 44 45 #endif // LLVM_TRANSFORMS_SCALAR_SCCP_H 46