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181b2f1f6d
This is done by splitting the `begin_borrow` of the whole struct into individual borrows of the fields (for trivial fields no borrow is needed). And then sinking the `struct` to it's consuming use(s). ``` %3 = struct $S(%nonTrivialField, %trivialField) // owned ... %4 = begin_borrow %3 %5 = struct_extract %4, #S.nonTrivialField %6 = struct_extract %4, #S.trivialField use %5, %6 end_borrow %4 ... end_of_lifetime %3 ``` -> ``` ... %5 = begin_borrow %nonTrivialField use %5, %trivialField end_borrow %5 ... %3 = struct $S(%nonTrivialField, %trivialField) end_of_lifetime %3 ``` This optimization is important for Array code where the Array buffer is constantly wrapped into structs and then extracted again to access the buffer.
50 lines
1.5 KiB
CMake
50 lines
1.5 KiB
CMake
# This source file is part of the Swift.org open source project
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#
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# Copyright (c) 2014 - 2021 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 http://swift.org/LICENSE.txt for license information
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# See http://swift.org/CONTRIBUTORS.txt for Swift project authors
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swift_compiler_sources(Optimizer
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SimplifyAllocRefDynamic.swift
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SimplifyAllocStack.swift
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SimplifyApply.swift
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SimplifyBeginAndLoadBorrow.swift
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SimplifyBeginCOWMutation.swift
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SimplifyBranch.swift
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SimplifyBuiltin.swift
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SimplifyCheckedCast.swift
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SimplifyClassifyBridgeObject.swift
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SimplifyCondBranch.swift
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SimplifyCondFail.swift
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SimplifyConvertEscapeToNoEscape.swift
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SimplifyCopyBlock.swift
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SimplifyCopyValue.swift
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SimplifyDebugStep.swift
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SimplifyDestroyValue.swift
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SimplifyDestructure.swift
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SimplifyEndCOWMutationAddr.swift
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SimplifyExplicitCopy.swift
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SimplifyFixLifetime.swift
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SimplifyGlobalValue.swift
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SimplifyInitEnumDataAddr.swift
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SimplifyKeyPath.swift
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SimplifyLoad.swift
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SimplifyMarkDependence.swift
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SimplifyMisc.swift
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SimplifyPartialApply.swift
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SimplifyPointerToAddress.swift
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SimplifyRefCasts.swift
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SimplifyRetainReleaseValue.swift
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SimplifyStrongRetainRelease.swift
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SimplifyStruct.swift
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SimplifyStructExtract.swift
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SimplifySwitchEnum.swift
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SimplifyTuple.swift
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SimplifyTupleExtract.swift
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SimplifyUncheckedAddrCast.swift
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SimplifyUncheckedEnumData.swift
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SimplifyValueToBridgeObject.swift
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SimplifyWitnessMethod.swift)
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