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AccessUtils: fix handling of store_borrow in AccessBase.isDistinct

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The result of a store_borrow can "escape" to other access bases, like a "pointer" access base.
Then a store-borrow access base is _not_ distinct from such another base.
This commit is contained in:
Erik Eckstein
2024-07-26 13:47:53 +02:00
parent 983d95509d
commit ceda41ca90
2 changed files with 27 additions and 5 deletions
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10
SwiftCompilerSources/Sources/SIL/Utilities/AccessUtils.swift
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@@ -286,11 +286,11 @@ public enum AccessBase : CustomStringConvertible, Hashable {
case (.storeBorrow(let arg), .storeBorrow(let otherArg)):
return arg.allocStack != otherArg.allocStack
// A StoreBorrow location can only be used by other StoreBorrows.
case (.storeBorrow, _):
return true
case (_, .storeBorrow):
return true
// Handle the special case of store_borrow - alloc_stack, because that would give a false result in the default case.
case (.storeBorrow(let sbi), .stack(let asi)):
return sbi.allocStack != asi
case (.stack(let asi), .storeBorrow(let sbi)):
return sbi.allocStack != asi
default:
// As we already handled pairs of the same kind, here we handle pairs with different kinds.