mirror of
https://github.com/apple/swift.git
synced 2025-12-14 20:36:38 +01:00
a312732f84
Although a let-field can never be mutated, a release or consume of the class must be considered as writing to such a field. This change removes the special handling of let-fields in two places, where they don't belong. Class fields are handled by ImmutableScope anyway. Handling of global let-variable is temporarily removed by this commit. Fixes a miscompile. rdar://142996449
84 lines
2.3 KiB
Swift
84 lines
2.3 KiB
Swift
//===--- MemBehaviorDumper.swift ------------------------------------------===//
|
|
//
|
|
// This source file is part of the Swift.org open source project
|
|
//
|
|
// Copyright (c) 2014 - 2023 Apple Inc. and the Swift project authors
|
|
// Licensed under Apache License v2.0 with Runtime Library Exception
|
|
//
|
|
// See https://swift.org/LICENSE.txt for license information
|
|
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
import SIL
|
|
|
|
/// Prints the memory behavior of relevant instructions in relation to address values of the function.
|
|
let memBehaviorDumper = FunctionPass(name: "dump-mem-behavior") {
|
|
(function: Function, context: FunctionPassContext) in
|
|
|
|
let aliasAnalysis = context.aliasAnalysis
|
|
|
|
print("@\(function.name)")
|
|
|
|
let values = function.allValues
|
|
|
|
var currentPair = 0
|
|
for inst in function.instructions where inst.shouldTest {
|
|
|
|
for value in values where value.definingInstruction != inst {
|
|
|
|
if value.type.isAddress {
|
|
let read = inst.mayRead(fromAddress: value, aliasAnalysis)
|
|
let write = inst.mayWrite(toAddress: value, aliasAnalysis)
|
|
print("PAIR #\(currentPair).")
|
|
print(" \(inst)")
|
|
print(" \(value)")
|
|
print(" r=\(read ? 1 : 0),w=\(write ? 1 : 0)")
|
|
currentPair += 1
|
|
}
|
|
}
|
|
}
|
|
print()
|
|
}
|
|
|
|
private extension Function {
|
|
var allValues: [Value] {
|
|
var values: [Value] = []
|
|
for block in blocks {
|
|
values.append(contentsOf: block.arguments.map { $0 })
|
|
for inst in block.instructions {
|
|
values.append(contentsOf: inst.results)
|
|
}
|
|
}
|
|
return values
|
|
}
|
|
}
|
|
|
|
private extension Instruction {
|
|
var shouldTest: Bool {
|
|
switch self {
|
|
case is ApplySite,
|
|
is EndApplyInst,
|
|
is AbortApplyInst,
|
|
is BeginAccessInst,
|
|
is EndAccessInst,
|
|
is EndCOWMutationInst,
|
|
is CopyValueInst,
|
|
is DestroyValueInst,
|
|
is StrongReleaseInst,
|
|
is IsUniqueInst,
|
|
is EndBorrowInst,
|
|
is LoadInst,
|
|
is LoadBorrowInst,
|
|
is StoreInst,
|
|
is CopyAddrInst,
|
|
is BuiltinInst,
|
|
is StoreBorrowInst,
|
|
is DebugValueInst:
|
|
return true
|
|
default:
|
|
return false
|
|
}
|
|
}
|
|
}
|