LLVM  9.0.0svn
AlignmentFromAssumptions.h
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1 //===---- AlignmentFromAssumptions.h ----------------------------*- 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 // This file implements a ScalarEvolution-based transformation to set
10 // the alignments of load, stores and memory intrinsics based on the truth
11 // expressions of assume intrinsics. The primary motivation is to handle
12 // complex alignment assumptions that apply to vector loads and stores that
13 // appear after vectorization and unrolling.
14 //
15 //===----------------------------------------------------------------------===//
16 
17 #ifndef LLVM_TRANSFORMS_SCALAR_ALIGNMENTFROMASSUMPTIONS_H
18 #define LLVM_TRANSFORMS_SCALAR_ALIGNMENTFROMASSUMPTIONS_H
19 
21 #include "llvm/IR/Function.h"
22 #include "llvm/IR/IntrinsicInst.h"
23 #include "llvm/IR/PassManager.h"
24 
25 namespace llvm {
26 
28  : public PassInfoMixin<AlignmentFromAssumptionsPass> {
30 
31  // Glue for old PM.
33  DominatorTree *DT_);
34 
35  ScalarEvolution *SE = nullptr;
36  DominatorTree *DT = nullptr;
37 
38  bool extractAlignmentInfo(CallInst *I, Value *&AAPtr, const SCEV *&AlignSCEV,
39  const SCEV *&OffSCEV);
41 };
42 }
43 
44 #endif // LLVM_TRANSFORMS_SCALAR_ALIGNMENTFROMASSUMPTIONS_H
This class represents lattice values for constants.
Definition: AllocatorList.h:23
The main scalar evolution driver.
This class represents a function call, abstracting a target machine&#39;s calling convention.
A cache of @llvm.assume calls within a function.
F(f)
A CRTP mix-in to automatically provide informational APIs needed for passes.
Definition: PassManager.h:372
Concrete subclass of DominatorTreeBase that is used to compute a normal dominator tree...
Definition: Dominators.h:144
PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM)
A set of analyses that are preserved following a run of a transformation pass.
Definition: PassManager.h:153
bool extractAlignmentInfo(CallInst *I, Value *&AAPtr, const SCEV *&AlignSCEV, const SCEV *&OffSCEV)
This class represents an analyzed expression in the program.
#define I(x, y, z)
Definition: MD5.cpp:58
LLVM Value Representation.
Definition: Value.h:72
bool runImpl(Function &F, AssumptionCache &AC, ScalarEvolution *SE_, DominatorTree *DT_)
A container for analyses that lazily runs them and caches their results.
This header defines various interfaces for pass management in LLVM.