Work around another SIL optimizer bug

beccadax · beccadax · commit 0a214ecc43ee · 2025-08-14T14:26:37.000-07:00
rdar://158353230 occurrs while trying to build the CodeGeneration subpackage.
diff --git a/CodeGeneration/Sources/SyntaxSupport/CompatibilityLayer.swift b/CodeGeneration/Sources/SyntaxSupport/CompatibilityLayer.swift
@@ -312,6 +312,7 @@ public struct DeprecatedMemberInfo {
       }
     }
 
+    @_optimize(none)  // Workaround for SIL optimizer crash (rdar://158353230)
     private func firstIndexOfChild(named targetName: String) -> Int {
       guard let i = children.firstIndex(where: { $0.name == targetName }) else {
         fatalError(

Original file line number	Diff line number	Diff line change
`@@ -312,6 +312,7 @@ public struct DeprecatedMemberInfo {`
`312`	`312`	`}`
`313`	`313`	`}`
`314`	`314`
	`315`	`+ @_optimize(none) // Workaround for SIL optimizer crash (rdar://158353230)`
`315`	`316`	`private func firstIndexOfChild(named targetName: String) -> Int {`
`316`	`317`	`guard let i = children.firstIndex(where: { $0.name == targetName }) else {`
`317`	`318`	`fatalError(`