Change the logic to exclude extended frame info on all platforms but darwin

(cherry picked from commit a1a9dd1)

Author: aschwaighofer

lib/Frontend/CompilerInvocation.cpp

@@ -1804,8 +1804,10 @@ static bool ParseIRGenArgs(IRGenOptions &Opts, ArgList &Args,
     }
   }
 
-  // Default to disabling swift async extended frame info on linux.
-  if (Triple.getOS() == llvm::Triple::Linux) {
+  // Default to disabling swift async extended frame info on anything but
+  // darwin. Other platforms are unlikely to have support for extended frame
+  // pointer information.
+  if (!Triple.isOSDarwin()) {
     Opts.SwiftAsyncFramePointer = SwiftAsyncFramePointerKind::Never;
   }
   if (const Arg *A = Args.getLastArg(OPT_swift_async_frame_pointer_EQ)) {

stdlib/public/Concurrency/CMakeLists.txt

@@ -37,15 +37,16 @@ if(NOT swift_concurrency_async_fp_mode)
   set(swift_concurrency_async_fp_mode "always")
 endif()
 
-# Don't emit extended frame info on linux, system backtracer and system debugger
-# are unlikely to support it.
-if(CMAKE_SYSTEM_NAME STREQUAL Linux)
-  list(APPEND SWIFT_RUNTIME_CONCURRENCY_C_FLAGS "-fswift-async-fp=never")
-elseif(CMAKE_SYSTEM_NAME STREQUAL Darwin)
-  list(APPEND SWIFT_RUNTIME_CONCURRENCY_C_FLAGS "-fswift-async-fp=${swift_concurrency_async_fp_mode}")
+# Don't emit extended frame info on platforms other than darwin, system
+# backtracer and system debugger are unlikely to support it.
+if(CMAKE_SYSTEM_NAME STREQUAL Darwin)
+  list(APPEND SWIFT_RUNTIME_CONCURRENCY_C_FLAGS
+    "-fswift-async-fp=${swift_concurrency_async_fp_mode}")
   list(APPEND SWIFT_RUNTIME_CONCURRENCY_SWIFT_FLAGS
     "-Xfrontend"
     "-swift-async-frame-pointer=${swift_concurrency_async_fp_mode}")
+else()
+  list(APPEND SWIFT_RUNTIME_CONCURRENCY_C_FLAGS "-fswift-async-fp=never")
 endif()
 
 add_swift_target_library(swift_Concurrency ${SWIFT_STDLIB_LIBRARY_BUILD_TYPES} IS_STDLIB