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Local.cpp was ~3k lines of which 1.5k (i.e. 1/2) was the cast optimizer. This commit extracts the cast optimizer into its own .cpp and .h file. It is large enough to stand on its own and allows for Local.cpp to return to being a small group of helper functions. I am making some changes in this area due to the change in certain function conventions caused by the +0-normal-arg work. I am just trying to leave the area a little cleaner than before.
131 lines
5.6 KiB
C++
131 lines
5.6 KiB
C++
//===--- CastOptimizer.h --------------------------------------------------===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2017 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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#ifndef SWIFT_SILOPTIMIZER_UTILS_CASTOPTIMIZER_H
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#define SWIFT_SILOPTIMIZER_UTILS_CASTOPTIMIZER_H
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#include "swift/Basic/ArrayRefView.h"
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#include "swift/SIL/SILBuilder.h"
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#include "swift/SIL/SILCloner.h"
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#include "swift/SIL/SILInstruction.h"
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#include "swift/SILOptimizer/Analysis/ARCAnalysis.h"
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#include "swift/SILOptimizer/Analysis/ClassHierarchyAnalysis.h"
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#include "swift/SILOptimizer/Analysis/EpilogueARCAnalysis.h"
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#include "swift/SILOptimizer/Analysis/SimplifyInstruction.h"
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#include "llvm/ADT/SmallPtrSet.h"
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#include "llvm/Support/Allocator.h"
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#include <functional>
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#include <utility>
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namespace swift {
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/// \brief This is a helper class used to optimize casts.
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class CastOptimizer {
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// Callback to be called when uses of an instruction should be replaced.
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std::function<void(SingleValueInstruction *I, ValueBase *V)>
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ReplaceInstUsesAction;
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// Callback to call when an instruction needs to be erased.
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std::function<void(SILInstruction *)> EraseInstAction;
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// Callback to call after an optimization was performed based on the fact
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// that a cast will succeed.
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std::function<void()> WillSucceedAction;
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// Callback to call after an optimization was performed based on the fact
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// that a cast will fail.
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std::function<void()> WillFailAction;
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/// Optimize a cast from a bridged ObjC type into
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/// a corresponding Swift type implementing _ObjectiveCBridgeable.
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SILInstruction *optimizeBridgedObjCToSwiftCast(
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SILInstruction *Inst, bool isConditional, SILValue Src, SILValue Dest,
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CanType Source, CanType Target, Type BridgedSourceTy,
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Type BridgedTargetTy, SILBasicBlock *SuccessBB, SILBasicBlock *FailureBB);
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/// Optimize a cast from a Swift type implementing _ObjectiveCBridgeable
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/// into a bridged ObjC type.
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SILInstruction *optimizeBridgedSwiftToObjCCast(
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SILInstruction *Inst, CastConsumptionKind ConsumptionKind,
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bool isConditional, SILValue Src, SILValue Dest, CanType Source,
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CanType Target, Type BridgedSourceTy, Type BridgedTargetTy,
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SILBasicBlock *SuccessBB, SILBasicBlock *FailureBB);
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void deleteInstructionsAfterUnreachable(SILInstruction *UnreachableInst,
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SILInstruction *TrapInst);
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public:
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CastOptimizer(std::function<void(SingleValueInstruction *I, ValueBase *V)>
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ReplaceInstUsesAction,
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std::function<void(SILInstruction *)> EraseAction,
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std::function<void()> WillSucceedAction,
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std::function<void()> WillFailAction = []() {})
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: ReplaceInstUsesAction(ReplaceInstUsesAction),
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EraseInstAction(EraseAction), WillSucceedAction(WillSucceedAction),
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WillFailAction(WillFailAction) {}
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// This constructor is used in
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// 'SILOptimizer/Mandatory/ConstantPropagation.cpp'. MSVC2015 compiler
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// couldn't use the single constructor version which has three default
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// arguments. It seems the number of the default argument with lambda is
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// limited.
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CastOptimizer(std::function<void(SingleValueInstruction *I, ValueBase *V)>
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ReplaceInstUsesAction,
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std::function<void(SILInstruction *)> EraseAction =
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[](SILInstruction *) {})
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: CastOptimizer(ReplaceInstUsesAction, EraseAction, []() {}, []() {}) {}
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/// Simplify checked_cast_br. It may change the control flow.
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SILInstruction *simplifyCheckedCastBranchInst(CheckedCastBranchInst *Inst);
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/// Simplify checked_cast_value_br. It may change the control flow.
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SILInstruction *
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simplifyCheckedCastValueBranchInst(CheckedCastValueBranchInst *Inst);
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/// Simplify checked_cast_addr_br. It may change the control flow.
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SILInstruction *
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simplifyCheckedCastAddrBranchInst(CheckedCastAddrBranchInst *Inst);
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/// Optimize checked_cast_br. This cannot change the control flow.
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SILInstruction *optimizeCheckedCastBranchInst(CheckedCastBranchInst *Inst);
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/// Optimize checked_cast_value_br. This cannot change the control flow.
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SILInstruction *
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optimizeCheckedCastValueBranchInst(CheckedCastValueBranchInst *Inst);
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/// Optimize checked_cast_addr_br. This cannot change the control flow.
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SILInstruction *
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optimizeCheckedCastAddrBranchInst(CheckedCastAddrBranchInst *Inst);
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/// Optimize unconditional_checked_cast. This cannot change the control flow.
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ValueBase *
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optimizeUnconditionalCheckedCastInst(UnconditionalCheckedCastInst *Inst);
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/// Optimize unconditional_checked_cast_addr. This cannot change the control
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/// flow.
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SILInstruction *optimizeUnconditionalCheckedCastAddrInst(
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UnconditionalCheckedCastAddrInst *Inst);
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/// Check if it is a bridged cast and optimize it.
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/// May change the control flow.
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SILInstruction *optimizeBridgedCasts(SILInstruction *Inst,
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CastConsumptionKind ConsumptionKind,
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bool isConditional, SILValue Src,
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SILValue Dest, CanType Source,
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CanType Target, SILBasicBlock *SuccessBB,
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SILBasicBlock *FailureBB);
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};
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} // namespace swift
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#endif // SWIFT_SILOPTIMIZER_UTILS_CASTOPTIMIZER_H
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