1// RUN: rm -rf %t
2//
3// RUN: %clang_cc1 -fmodules -x c++ -fmodules-cache-path=%t \
4// RUN:   -fno-implicit-modules \
5// RUN:   -emit-module -fmodule-name=empty -o %t/base.pcm \
6// RUN:   %s
7//
8// RUN: %clang_cc1 -fmodules -x c++ -fmodules-cache-path=%t \
9// RUN:   -fno-implicit-modules \
10// RUN:   -emit-module -fmodule-name=empty -o %t/check.pcm \
11// RUN:   %s
12//
13// The module file should be identical each time we produce it.
14// RUN: diff %t/base.pcm %t/check.pcm
15//
16// We expect an empty module to be less than 40KB (and at least 10K, for now).
17// RUN: wc -c %t/base.pcm | FileCheck --check-prefix=CHECK-SIZE %s
18// CHECK-SIZE: {{(^|[^0-9])[123][0-9][0-9][0-9][0-9]($|[^0-9])}}
19
20module empty { header "Inputs/empty.h" export * }
21