IRGen: Enable EmitAsyncFramePushPopMetadata per default

rdar://136292425

Author: aschwaighofer

include/swift/AST/IRGenOptions.h

@@ -590,7 +590,7 @@ class IRGenOptions {
         DisableReadonlyStaticObjects(false), CollocatedMetadataFunctions(false),
         ColocateTypeDescriptors(true), UseRelativeProtocolWitnessTables(false),
         UseFragileResilientProtocolWitnesses(false), EnableHotColdSplit(false),
-        EmitAsyncFramePushPopMetadata(false), EmitYieldOnce2AsYieldOnce(true),
+        EmitAsyncFramePushPopMetadata(true), EmitYieldOnce2AsYieldOnce(true),
         AsyncFramePointerAll(false), UseProfilingMarkerThunks(false),
         DebugInfoForProfiling(false), CmdArgs(),
         SanitizeCoverage(llvm::SanitizerCoverageOptions()),

test/IRGen/async_frame_entry_return_metadata.swift

@@ -1,7 +1,7 @@
 // RUN: %target-swift-frontend -primary-file %s -emit-ir  -module-name async -target %target-swift-5.1-abi-triple -enable-async-frame-push-pop-metadata | %FileCheck %s --check-prefix=ENABLED
 // RUN: %target-swift-frontend -primary-file %s -emit-ir  -module-name async -target %target-swift-5.1-abi-triple -O -enable-async-frame-push-pop-metadata | %FileCheck %s --check-prefix=ENABLED
 // RUN: %target-swift-frontend -primary-file %s -emit-ir  -module-name async -target %target-swift-5.1-abi-triple -disable-async-frame-push-pop-metadata | %FileCheck %s --check-prefix=DISABLED
-// RUN: %target-swift-frontend -primary-file %s -emit-ir  -module-name async -target %target-swift-5.1-abi-triple | %FileCheck %s --check-prefix=DISABLED
+// RUN: %target-swift-frontend -primary-file %s -emit-ir  -module-name async -target %target-swift-5.1-abi-triple | %FileCheck %s --check-prefix=ENABLED
 
 // REQUIRES: OS=macosx || OS=iphoneos
 // REQUIRES: PTRSIZE=64