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/IR/PassManager.h"
24 
25 namespace llvm {
26 class Function;
27 
28 /// This pass performs function-level constant propagation and merging.
29 class SCCPPass : public PassInfoMixin<SCCPPass> {
30 public:
31   PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
32 };
33 
34 } // end namespace llvm
35 
36 #endif // LLVM_TRANSFORMS_SCALAR_SCCP_H
37