[modules] Compress files embedded into a .pcm file, to reduce the disk usage of -fembed-all-files mode.

llvm-svn: 259976

1 files changed, 23 insertions, 0 deletions

diff --git a/clang/test/Modules/embed-files-compressed.cpp b/clang/test/Modules/embed-files-compressed.cpp
new file mode 100644
index 00000000000..cf33a662f91
--- /dev/null
+++ b/clang/test/Modules/embed-files-compressed.cpp
@@ -0,0 +1,23 @@
+// REQUIRES: zlib
+// REQUIRES: shell
+//
+// RUN: rm -rf %t
+// RUN: mkdir %t
+// RUN: echo '//////////////////////////////////////////////////////////////////////' > %t/a.h
+// RUN: cat %t/a.h %t/a.h %t/a.h %t/a.h > %t/b.h
+// RUN: cat %t/b.h %t/b.h %t/b.h %t/b.h > %t/a.h
+// RUN: cat %t/a.h %t/a.h %t/a.h %t/a.h > %t/b.h
+// RUN: cat %t/b.h %t/b.h %t/b.h %t/b.h > %t/a.h
+// RUN: cat %t/a.h %t/a.h %t/a.h %t/a.h > %t/b.h
+// RUN: cat %t/b.h %t/b.h %t/b.h %t/b.h > %t/a.h
+// RUN: cat %t/a.h %t/a.h %t/a.h %t/a.h > %t/b.h
+// RUN: cat %t/b.h %t/b.h %t/b.h %t/b.h > %t/a.h
+// RUN: echo 'module a { header "a.h" }' > %t/modulemap
+//
+// RUN: %clang_cc1 -fmodules -I%t -fmodules-cache-path=%t -fmodule-name=a -emit-module %t/modulemap -fmodules-embed-all-files -o %t/a.pcm
+//
+// The above embeds ~4.5MB of highly-predictable /s and \ns into the pcm file.
+// Check that the resulting file is under 40KB:
+//
+// RUN: wc -c %t/a.pcm | FileCheck --check-prefix=CHECK-SIZE %s
+// CHECK-SIZE: {{(^|[^0-9])[123][0-9][0-9][0-9][0-9]($|[^0-9])}}