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📄 ASanStackFrameLayout.h(3.51 KB)
📄 AddDiscriminators.h(1.04 KB)
📄 AssumeBundleBuilder.h(2.29 KB)
📄 BasicBlockUtils.h(20.81 KB)
📄 BreakCriticalEdges.h(1.16 KB)
📄 BuildLibCalls.h(9.67 KB)
📄 BypassSlowDivision.h(2.55 KB)
📄 CallGraphUpdater.h(3.84 KB)
📄 CallPromotionUtils.h(3.41 KB)
📄 CanonicalizeAliases.h(998 B)
📄 CanonicalizeFreezeInLoops.h(1.15 KB)
📄 Cloning.h(12.34 KB)
📄 CodeExtractor.h(9.58 KB)
📄 CodeMoverUtils.h(2.85 KB)
📄 CtorUtils.h(1021 B)
📄 Debugify.h(3.36 KB)
📄 EntryExitInstrumenter.h(1.16 KB)
📄 EscapeEnumerator.h(1.56 KB)
📄 Evaluator.h(4.69 KB)
📄 FunctionComparator.h(17.12 KB)
📄 FunctionImportUtils.h(5.73 KB)
📄 GlobalStatus.h(2.97 KB)
📄 GuardUtils.h(1.92 KB)
📄 ImportedFunctionsInliningStatistics.h(4.35 KB)
📄 InjectTLIMappings.h(1.27 KB)
📄 IntegerDivision.h(2.88 KB)
📄 LCSSA.h(1.56 KB)
📄 LibCallsShrinkWrap.h(908 B)
📄 Local.h(24.77 KB)
📄 LoopRotationUtils.h(1.54 KB)
📄 LoopSimplify.h(2.85 KB)
📄 LoopUtils.h(21.25 KB)
📄 LoopVersioning.h(5.87 KB)
📄 LowerInvoke.h(1.08 KB)
📄 LowerMemIntrinsics.h(2.14 KB)
📄 Mem2Reg.h(921 B)
📄 MisExpect.h(1.81 KB)
📄 ModuleUtils.h(5.04 KB)
📄 NameAnonGlobals.h(1.03 KB)
📄 PredicateInfo.h(7.76 KB)
📄 PromoteMemToReg.h(1.57 KB)
📄 SSAUpdater.h(6.12 KB)
📄 SSAUpdaterBulk.h(3.18 KB)
📄 SSAUpdaterImpl.h(15.75 KB)
📄 SanitizerStats.h(1.53 KB)
📄 ScalarEvolutionExpander.h(17.87 KB)
📄 SimplifyIndVar.h(2.12 KB)
📄 SimplifyLibCalls.h(10.85 KB)
📄 SizeOpts.h(4.84 KB)
📄 SplitModule.h(1.53 KB)
📄 SymbolRewriter.h(5.02 KB)
📄 UnifyFunctionExitNodes.h(1.83 KB)
📄 UniqueInternalLinkageNames.h(1.07 KB)
📄 UnrollLoop.h(6.05 KB)
📄 VNCoercion.h(4.99 KB)
📄 ValueMapper.h(11.67 KB)

Editing: CallPromotionUtils.h

//===- CallPromotionUtils.h - Utilities for call promotion ------*- 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 file declares utilities useful for promoting indirect call sites to
// direct call sites.
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_TRANSFORMS_UTILS_CALLPROMOTIONUTILS_H
#define LLVM_TRANSFORMS_UTILS_CALLPROMOTIONUTILS_H

namespace llvm {
class CallBase;
class CastInst;
class Function;
class MDNode;

/// Return true if the given indirect call site can be made to call \p Callee.
///
/// This function ensures that the number and type of the call site's arguments
/// and return value match those of the given function. If the types do not
/// match exactly, they must at least be bitcast compatible. If \p FailureReason
/// is non-null and the indirect call cannot be promoted, the failure reason
/// will be stored in it.
bool isLegalToPromote(const CallBase &CB, Function *Callee,
                      const char **FailureReason = nullptr);

/// Promote the given indirect call site to unconditionally call \p Callee.
///
/// This function promotes the given call site, returning the direct call or
/// invoke instruction. If the function type of the call site doesn't match that
/// of the callee, bitcast instructions are inserted where appropriate. If \p
/// RetBitCast is non-null, it will be used to store the return value bitcast,
/// if created.
CallBase &promoteCall(CallBase &CB, Function *Callee,
                      CastInst **RetBitCast = nullptr);

/// Promote the given indirect call site to conditionally call \p Callee.
///
/// This function creates an if-then-else structure at the location of the call
/// site. The original call site is moved into the "else" block. A clone of the
/// indirect call site is promoted, placed in the "then" block, and returned. If
/// \p BranchWeights is non-null, it will be used to set !prof metadata on the
/// new conditional branch.
CallBase &promoteCallWithIfThenElse(CallBase &CB, Function *Callee,
                                    MDNode *BranchWeights = nullptr);

/// Try to promote (devirtualize) a virtual call on an Alloca. Return true on
/// success.
///
/// Look for a pattern like:
///
///  %o = alloca %class.Impl
///  %1 = getelementptr %class.Impl, %class.Impl* %o, i64 0, i32 0, i32 0
///  store i32 (...)** bitcast (i8** getelementptr inbounds
///      ({ [3 x i8*] }, { [3 x i8*] }* @_ZTV4Impl, i64 0, inrange i32 0, i64 2)
///      to i32 (...)**), i32 (...)*** %1
///  %2 = getelementptr inbounds %class.Impl, %class.Impl* %o, i64 0, i32 0
///  %3 = bitcast %class.Interface* %2 to void (%class.Interface*)***
///  %vtable.i = load void (%class.Interface*)**, void (%class.Interface*)*** %3
///  %4 = load void (%class.Interface*)*, void (%class.Interface*)** %vtable.i
///  call void %4(%class.Interface* nonnull %2)
///
/// @_ZTV4Impl = linkonce_odr dso_local unnamed_addr constant { [3 x i8*] }
///     { [3 x i8*]
///     [i8* null, i8* bitcast ({ i8*, i8*, i8* }* @_ZTI4Impl to i8*),
///     i8* bitcast (void (%class.Impl*)* @_ZN4Impl3RunEv to i8*)] }
///
bool tryPromoteCall(CallBase &CB);

} // end namespace llvm

#endif // LLVM_TRANSFORMS_UTILS_CALLPROMOTIONUTILS_H

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