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📄 ADCE.h(1.38 KB)
📄 AlignmentFromAssumptions.h(1.6 KB)
📄 BDCE.h(1.04 KB)
📄 CallSiteSplitting.h(810 B)
📄 ConstantHoisting.h(8.02 KB)
📄 CorrelatedValuePropagation.h(810 B)
📄 DCE.h(892 B)
📄 DeadStoreElimination.h(1.2 KB)
📄 DivRemPairs.h(1.01 KB)
📄 EarlyCSE.h(1.41 KB)
📄 Float2Int.h(1.74 KB)
📄 GVN.h(12.57 KB)
📄 GVNExpression.h(20.21 KB)
📄 GuardWidening.h(1.18 KB)
📄 IVUsersPrinter.h(960 B)
📄 IndVarSimplify.h(1.03 KB)
📄 InductiveRangeCheckElimination.h(950 B)
📄 InstSimplifyPass.h(1.64 KB)
📄 JumpThreading.h(6.55 KB)
📄 LICM.h(2.78 KB)
📄 LoopAccessAnalysisPrinter.h(999 B)
📄 LoopDataPrefetch.h(1.06 KB)
📄 LoopDeletion.h(1.13 KB)
📄 LoopDistribute.h(1.08 KB)
📄 LoopFuse.h(876 B)
📄 LoopIdiomRecognize.h(1.18 KB)
📄 LoopInstSimplify.h(1.07 KB)
📄 LoopLoadElimination.h(1.1 KB)
📄 LoopPassManager.h(15.85 KB)
📄 LoopPredication.h(1.12 KB)
📄 LoopRotation.h(1.13 KB)
📄 LoopSimplifyCFG.h(1.31 KB)
📄 LoopSink.h(1.54 KB)
📄 LoopStrengthReduce.h(1.52 KB)
📄 LoopUnrollAndJamPass.h(921 B)
📄 LoopUnrollPass.h(4.97 KB)
📄 LowerAtomic.h(974 B)
📄 LowerConstantIntrinsics.h(1.4 KB)
📄 LowerExpectIntrinsic.h(1.25 KB)
📄 LowerGuardIntrinsic.h(992 B)
📄 LowerMatrixIntrinsics.h(868 B)
📄 LowerWidenableCondition.h(937 B)
📄 MakeGuardsExplicit.h(1.85 KB)
📄 MemCpyOptimizer.h(2.71 KB)
📄 MergeICmps.h(714 B)
📄 MergedLoadStoreMotion.h(2.02 KB)
📄 NaryReassociate.h(6.98 KB)
📄 NewGVN.h(935 B)
📄 PartiallyInlineLibCalls.h(1.04 KB)
📄 Reassociate.h(4.6 KB)
📄 RewriteStatepointsForGC.h(1.27 KB)
📄 SCCP.h(1.81 KB)
📄 SROA.h(5.29 KB)
📄 Scalarizer.h(1.18 KB)
📄 SimpleLoopUnswitch.h(3.35 KB)
📄 SimplifyCFG.h(2.01 KB)
📄 Sink.h(998 B)
📄 SpeculateAroundPHIs.h(3.69 KB)
📄 SpeculativeExecution.h(3.04 KB)
📄 TailRecursionElimination.h(3.3 KB)
📄 WarnMissedTransforms.h(1.19 KB)

Editing: LICM.h

//===- LICM.h - Loop Invariant Code Motion Pass -------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This pass performs loop invariant code motion, attempting to remove as much
// code from the body of a loop as possible.  It does this by either hoisting
// code into the preheader block, or by sinking code to the exit blocks if it is
// safe.  This pass also promotes must-aliased memory locations in the loop to
// live in registers, thus hoisting and sinking "invariant" loads and stores.
//
// This pass uses alias analysis for two purposes:
//
//  1. Moving loop invariant loads and calls out of loops.  If we can determine
//     that a load or call inside of a loop never aliases anything stored to,
//     we can hoist it or sink it like any other instruction.
//  2. Scalar Promotion of Memory - If there is a store instruction inside of
//     the loop, we try to move the store to happen AFTER the loop instead of
//     inside of the loop.  This can only happen if a few conditions are true:
//       A. The pointer stored through is loop invariant
//       B. There are no stores or loads in the loop which _may_ alias the
//          pointer.  There are no calls in the loop which mod/ref the pointer.
//     If these conditions are true, we can promote the loads and stores in the
//     loop of the pointer to use a temporary alloca'd variable.  We then use
//     the SSAUpdater to construct the appropriate SSA form for the value.
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_TRANSFORMS_SCALAR_LICM_H
#define LLVM_TRANSFORMS_SCALAR_LICM_H

#include "llvm/Analysis/LoopInfo.h"
#include "llvm/IR/PassManager.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Transforms/Scalar/LoopPassManager.h"

namespace llvm {

extern cl::opt<unsigned> SetLicmMssaOptCap;
extern cl::opt<unsigned> SetLicmMssaNoAccForPromotionCap;

/// Performs Loop Invariant Code Motion Pass.
class LICMPass : public PassInfoMixin<LICMPass> {
  unsigned LicmMssaOptCap;
  unsigned LicmMssaNoAccForPromotionCap;

public:
  LICMPass()
      : LicmMssaOptCap(SetLicmMssaOptCap),
        LicmMssaNoAccForPromotionCap(SetLicmMssaNoAccForPromotionCap) {}
  LICMPass(unsigned LicmMssaOptCap, unsigned LicmMssaNoAccForPromotionCap)
      : LicmMssaOptCap(LicmMssaOptCap),
        LicmMssaNoAccForPromotionCap(LicmMssaNoAccForPromotionCap) {}
  PreservedAnalyses run(Loop &L, LoopAnalysisManager &AM,
                        LoopStandardAnalysisResults &AR, LPMUpdater &U);
};
} // end namespace llvm

#endif // LLVM_TRANSFORMS_SCALAR_LICM_H

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