RUN: dsymutil -oso-prepend-path %p/.. %p/../Inputs/swift-ast.macho.x86_64 -o %T/swift-ast.dSYM -verbose -no-swiftmodule-timestamp | FileCheck %s --check-prefix=DSYMUTIL
RUN: llvm-readobj --sections --section-data %T/swift-ast.dSYM/Contents/Resources/DWARF/swift-ast.macho.x86_64 | FileCheck %s --check-prefix=READOBJ

The tested object file has been created by the dummy Swift code:
let x = 1

Compiled with:
  swiftc /tmp/test.swift -Onone -target x86_64-apple-macosx10.9 -c
  ld swift-ast.o -add_ast_path Inputs/swift-ast.swiftmodule -arch x86_64 -lSystem -macosx_version_min 10.9.0

DSYMUTIL: filename:{{.*}}swift-ast.swiftmodule
DSYMUTIL-NOT: The file was not recognized as a valid object file
DSYMUTIL: DEBUG MAP OBJECT:{{.*}}swift-ast.swiftmodule

READOBJ: Name:{{.*}}__swift_ast
READOBJ: |SWIFTMODULE DATA|
READOBJ-NEXT: |.|

RUN: dsymutil -oso-prepend-path %p/.. %p/../Inputs/swift-ast.macho.x86_64 -no-output -verbose 2>&1 | FileCheck %s --check-prefix=TIMESTAMP
TIMESTAMP: warning: Timestamp mismatch

RUN: dsymutil -s %T/swift-ast.dSYM/Contents/Resources/DWARF/swift-ast.macho.x86_64 | FileCheck %s --check-prefix=NAST
NAST-NOT: N_AST