[SILGen] Handled foreign funcs with async, error, and more args.

lib/SILGen/SILGenApply.cpp

@@ -3299,26 +3299,33 @@ class ArgEmitter {
   }
 
   void maybeEmitForeignArgument() {
-    if (Foreign.async
-        && Foreign.async->completionHandlerParamIndex() == Args.size()) {
-      SILParameterInfo param = claimNextParameters(1).front();
-      (void)param;
-
-      // Leave a placeholder in the position. We'll fill this in with a block
-      // capturing the current continuation right before we invoke the
-      // function.
-      // (We can't do this immediately, because evaluating other arguments
-      // may require suspending the async task, which is not allowed while its
-      // continuation is active.)
-      Args.push_back(ManagedValue::forInContext());
-    } else if (Foreign.error
-               && Foreign.error->getErrorParameterIndex() == Args.size()) {
-      SILParameterInfo param = claimNextParameters(1).front();
-      assert(param.getConvention() == ParameterConvention::Direct_Unowned);
-      (void) param;
-
-      // Leave a placeholder in the position.
-      Args.push_back(ManagedValue::forInContext());
+    bool keepGoing = true;
+    while (keepGoing) {
+      keepGoing = false;
+      if (Foreign.async &&
+          Foreign.async->completionHandlerParamIndex() == Args.size()) {
+        SILParameterInfo param = claimNextParameters(1).front();
+        (void)param;
+
+        // Leave a placeholder in the position. We'll fill this in with a block
+        // capturing the current continuation right before we invoke the
+        // function.
+        // (We can't do this immediately, because evaluating other arguments
+        // may require suspending the async task, which is not allowed while its
+        // continuation is active.)
+        Args.push_back(ManagedValue::forInContext());
+        keepGoing = true;
+      }
+      if (Foreign.error &&
+          Foreign.error->getErrorParameterIndex() == Args.size()) {
+        SILParameterInfo param = claimNextParameters(1).front();
+        assert(param.getConvention() == ParameterConvention::Direct_Unowned);
+        (void)param;
+
+        // Leave a placeholder in the position.
+        Args.push_back(ManagedValue::forInContext());
+        keepGoing = true;
+      }
     }
   }
 
@@ -3541,7 +3548,9 @@ struct ParamLowering {
       }
     }
 
-    if (foreign.error || foreign.async)
+    if (foreign.error)
+      ++count;
+    if (foreign.async)
       ++count;
 
     if (foreign.self.isImportAsMember()) {
@@ -4202,18 +4211,12 @@ ApplyOptions CallEmission::emitArgumentsForNormalApply(
 
     args.push_back({});
 
-    if (!foreign.async || (foreign.async && foreign.error)) {
-      // Claim the foreign error argument(s) with the method formal params.
-      auto siteForeignError = ForeignInfo{{}, foreign.error, {}};
-      std::move(*callSite).emit(SGF, origFormalType, substFnType, paramLowering,
-                                args.back(), delayedArgs, siteForeignError);
-    }
-    if (foreign.async) {
-      // Claim the foreign async argument(s) with the method formal params.
-      auto siteForeignAsync = ForeignInfo{{}, {}, foreign.async};
-      std::move(*callSite).emit(SGF, origFormalType, substFnType, paramLowering,
-                                args.back(), delayedArgs, siteForeignAsync);
-    }
+    // Claim the foreign error and/or async arguments when claiming the formal
+    // params.
+    auto siteForeignError = ForeignInfo{{}, foreign.error, foreign.async};
+    // Claim the method formal params.
+    std::move(*callSite).emit(SGF, origFormalType, substFnType, paramLowering,
+                              args.back(), delayedArgs, siteForeignError);
   }
 
   uncurriedLoc = callSite->Loc;

validation-test/compiler_crashers_2_fixed/Inputs/rdar80704984_3.h

@@ -0,0 +1,28 @@
+#include <Foundation/Foundation.h>
+
+#pragma clang assume_nonnull begin
+
+typedef void (^CompletionHandler)(int status, NSInteger bytesTransferred);
+
+@interface PFXObject : NSObject
+- (BOOL)enqueueFailingRequestWithData:(nullable NSMutableData *)data
+                                error:(NSError *_Nullable *)error
+                    completionHandler:
+                        (nullable CompletionHandler)completionHandler;
+- (BOOL)enqueuePassingRequestWithData:(nullable NSMutableData *)data
+                                error:(NSError *_Nullable *)error
+                    completionHandler:
+                        (nullable CompletionHandler)completionHandler;
+- (BOOL)enqueueFailingRequestWithData:(nullable NSMutableData *)data
+                    completionTimeout:(NSTimeInterval)completionTimeout
+                                error:(NSError *_Nullable *)error
+                    completionHandler:
+                        (nullable CompletionHandler)completionHandler;
+- (BOOL)enqueuePassingRequestWithData:(nullable NSMutableData *)data
+                    completionTimeout:(NSTimeInterval)completionTimeout
+                                error:(NSError *_Nullable *)error
+                    completionHandler:
+                        (nullable CompletionHandler)completionHandler;
+@end
+
+#pragma clang assume_nonnull end

validation-test/compiler_crashers_2_fixed/Inputs/rdar80704984_3.m

@@ -0,0 +1,45 @@
+#include "rdar80704984_3.h"
+
+#pragma clang assume_nonnull begin
+
+@implementation PFXObject
+
+- (BOOL)enqueueFailingRequestWithData:(nullable NSMutableData *)data
+                                error:(NSError *_Nullable *)error
+                    completionHandler:
+                        (nullable CompletionHandler)completionHandler {
+  *error = [[NSError alloc] initWithDomain:@"d" code:1 userInfo:nil];
+  return NO;
+}
+- (BOOL)enqueuePassingRequestWithData:(nullable NSMutableData *)data
+                                error:(NSError *_Nullable *)error
+                    completionHandler:
+                        (nullable CompletionHandler)completionHandler {
+  dispatch_async(dispatch_get_main_queue(), ^{
+    completionHandler(0, 2);
+  });
+  return YES;
+}
+
+- (BOOL)enqueueFailingRequestWithData:(nullable NSMutableData *)data
+                    completionTimeout:(NSTimeInterval)completionTimeout
+                                error:(NSError *_Nullable *)error
+                    completionHandler:
+                        (nullable CompletionHandler)completionHandler {
+  *error = [[NSError alloc] initWithDomain:@"d" code:2 userInfo:nil];
+  return NO;
+}
+- (BOOL)enqueuePassingRequestWithData:(nullable NSMutableData *)data
+                    completionTimeout:(NSTimeInterval)completionTimeout
+                                error:(NSError *_Nullable *)error
+                    completionHandler:
+                        (nullable CompletionHandler)completionHandler {
+  dispatch_async(dispatch_get_main_queue(), ^{
+    completionHandler(0, 3);
+  });
+  return YES;
+}
+
+@end
+
+#pragma clang assume_nonnull end

validation-test/compiler_crashers_2_fixed/rdar80704984_3.swift

@@ -0,0 +1,54 @@
+// RUN: %empty-directory(%t)
+// RUN: %target-clang %S/Inputs/rdar80704984_3.m -I %S/Inputs -c -o %t/rdar80704984_3.o
+// RUN: %target-build-swift -Xfrontend -disable-availability-checking -import-objc-header %S/Inputs/rdar80704984_3.h -Xlinker %t/rdar80704984_3.o -parse-as-library %s -o %t/a.out
+// RUN: %target-codesign %t/a.out
+// RUN: %target-run %t/a.out | %FileCheck %s
+
+// REQUIRES: executable_test
+// REQUIRES: objc_interop
+
+// rdar://82123254
+// UNSUPPORTED: use_os_stdlib
+// UNSUPPORTED: back_deployment_runtime
+
+func run1(on object: PFXObject) async throws {
+  do {
+    _ = try await object.enqueueFailingRequest(with: nil)
+  }
+  catch let error {
+    // CHECK: Domain=d Code=1 
+    print(error)
+  }
+}
+
+func run2(on object: PFXObject) async throws {
+    // CHECK: (0, 2)
+    print(try await object.enqueuePassingRequest(with: nil))
+
+}
+
+func run3(on object: PFXObject) async throws {
+  do {
+    _ = try await object.enqueueFailingRequest(with: nil, completionTimeout: 57.0)
+  }
+  catch let error {
+    // CHECK: Domain=d Code=2 
+    print(error)
+  }
+}
+
+func run4(on object: PFXObject) async throws {
+    // CHECK: (0, 3)
+    print(try await object.enqueuePassingRequest(with: nil, completionTimeout: 57.0))
+
+}
+
+@main struct Main {
+  static func main() async throws {
+    let object = PFXObject()
+    try await run1(on: object)
+    try await run2(on: object)
+    try await run3(on: object)
+    try await run4(on: object)
+  }
+}