xref: /netbsd-src/external/apache2/llvm/dist/llvm/include/llvm/Transforms/Scalar/SCCP.h (revision 82d56013d7b633d116a93943de88e08335357a7c)
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/STLExtras.h"
24 #include "llvm/Analysis/TargetLibraryInfo.h"
25 #include "llvm/IR/DataLayout.h"
26 #include "llvm/IR/Function.h"
27 #include "llvm/IR/Module.h"
28 #include "llvm/IR/PassManager.h"
29 #include "llvm/Transforms/Utils/PredicateInfo.h"
30 #include "llvm/Transforms/Utils/SCCPSolver.h"
31 
32 namespace llvm {
33 
34 class PostDominatorTree;
35 
36 /// This pass performs function-level constant propagation and merging.
37 class SCCPPass : public PassInfoMixin<SCCPPass> {
38 public:
39   PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
40 };
41 
42 bool runIPSCCP(Module &M, const DataLayout &DL,
43                std::function<const TargetLibraryInfo &(Function &)> GetTLI,
44                function_ref<AnalysisResultsForFn(Function &)> getAnalysis);
45 } // end namespace llvm
46 
47 #endif // LLVM_TRANSFORMS_SCALAR_SCCP_H
48