Merge pull request swiftlang#74361 from nate-chandler/gh69252

[Test] Add regression test.

Author: nate-chandler

validation-test/SILOptimizer/consume_checking.swift

@@ -0,0 +1,42 @@
+// RUN: %target-swift-frontend \
+// RUN:   -emit-sil -verify    \
+// RUN:   %s                   \
+// RUN:   -sil-verify-all
+
+////////////////////////////////////////////////////////////////////////////////
+// https://github.com/apple/swift/issues/69252                {{
+////////////////////////////////////////////////////////////////////////////////
+public enum LineEnding: String {
+  /// The default unix `\n` character
+  case lineFeed = "\n"
+  /// MacOS line ending `\r` character
+  case carriageReturn = "\r"
+  /// Windows line ending sequence `\r\n`
+  case carriageReturnLineFeed = "\r\n"
+
+  /// Initialize a line ending from a line string.
+  /// - Parameter line: The line to use
+  public init?(line: borrowing String) {
+    guard let lastChar = line.last,
+          let lineEnding = LineEnding(rawValue: String(lastChar)) else { return nil }
+    self = lineEnding
+  }
+
+
+  static func makeLineEnding(_ line: borrowing String) -> LineEnding? {
+     guard let lastChar = line.last,
+          let lineEnding = LineEnding(rawValue: String(lastChar)) else { return nil }
+      _ = lineEnding
+     return nil
+  }
+
+  func makeLineEnding(_ line: borrowing String) -> LineEnding? {
+    guard let lastChar = line.last,
+          let lineEnding = LineEnding(rawValue: String(lastChar)) else { return nil }
+    _ = lineEnding
+    return nil
+  }
+}
+////////////////////////////////////////////////////////////////////////////////
+// https://github.com/apple/swift/issues/69252                }}
+////////////////////////////////////////////////////////////////////////////////