Merge pull request swiftlang#74508 from atrick/60-guard-lifedep

[6.0] Guard lifetime dependence diagnostics by experimental flag

Author: atrick

SwiftCompilerSources/Sources/Optimizer/FunctionPasses/LifetimeDependenceDiagnostics.swift

@@ -29,6 +29,9 @@ private func log(prefix: Bool = true, _ message: @autoclosure () -> String) {
 let lifetimeDependenceDiagnosticsPass = FunctionPass(
   name: "lifetime-dependence-diagnostics")
 { (function: Function, context: FunctionPassContext) in
+  if !context.options.hasFeature(.NonescapableTypes) {
+    return
+  }
   log(prefix: false, "\n--- Diagnosing lifetime dependence in \(function.name)")
   log("\(function)")
 

SwiftCompilerSources/Sources/Optimizer/FunctionPasses/LifetimeDependenceInsertion.swift

@@ -31,6 +31,9 @@ private func log(prefix: Bool = true, _ message: @autoclosure () -> String) {
 let lifetimeDependenceInsertionPass = FunctionPass(
   name: "lifetime-dependence-insertion")
 { (function: Function, context: FunctionPassContext) in
+  if !context.options.hasFeature(.NonescapableTypes) {
+    return
+  }
   log(prefix: false, "\n--- Inserting lifetime dependence markers in \(function.name)")
 
   for instruction in function.instructions {

SwiftCompilerSources/Sources/Optimizer/FunctionPasses/LifetimeDependenceScopeFixup.swift

@@ -31,6 +31,9 @@ private func log(prefix: Bool = true, _ message: @autoclosure () -> String) {
 let lifetimeDependenceScopeFixupPass = FunctionPass(
   name: "lifetime-dependence-scope-fixup")
 { (function: Function, context: FunctionPassContext) in
+  if !context.options.hasFeature(.NonescapableTypes) {
+    return
+  }
   log(prefix: false, "\n--- Scope fixup for lifetime dependence in \(function.name)")
 
   let localReachabilityCache = LocalVariableReachabilityCache()