cmake: Simplify add_lit_testsuites

cmake 3.4 introduced LIST_DIRECTORIES to glob recurse, which can be
used to simplify this code greatly.

llvm-svn: 272217

1 files changed, 13 insertions, 21 deletions

diff --git a/llvm/cmake/modules/AddLLVM.cmake b/llvm/cmake/modules/AddLLVM.cmake
index 4668ddc78a8..146dde516ab 100644
--- a/llvm/cmake/modules/AddLLVM.cmake
+++ b/llvm/cmake/modules/AddLLVM.cmake
@@ -1122,32 +1122,24 @@ function(add_lit_testsuites project directory)
 
     # Search recursively for test directories by assuming anything not
     # in a directory called Inputs contains tests.
-    set(lit_suites)
-    file(GLOB to_process ${directory}/*)
-    while(to_process)
-      set(cur_to_process ${to_process})
-      set(to_process)
-      foreach(lit_suite ${cur_to_process})
-        if(IS_DIRECTORY ${lit_suite})
-          string(FIND ${lit_suite} Inputs is_inputs)
-          if (is_inputs EQUAL -1)
-            list(APPEND lit_suites "${lit_suite}")
-            file(GLOB subdirs ${lit_suite}/*)
-            list(APPEND to_process ${subdirs})
-          endif()
-        endif()
-      endforeach()
-    endwhile()
+    file(GLOB_RECURSE to_process LIST_DIRECTORIES true ${directory}/*)
+    foreach(lit_suite ${to_process})
+      if(NOT IS_DIRECTORY ${lit_suite})
+        continue()
+      endif()
+      string(FIND ${lit_suite} Inputs is_inputs)
+      if (NOT is_inputs EQUAL -1)
+        continue()
+      endif()
 
-    # Now create a check- target for each test directory.
-    foreach(dir ${lit_suites})
-      string(REPLACE ${directory} "" name_slash ${dir})
+      # Create a check- target for the directory.
+      string(REPLACE ${directory} "" name_slash ${lit_suite})
       if (name_slash)
         string(REPLACE "/" "-" name_slash ${name_slash})
         string(REPLACE "\\" "-" name_dashes ${name_slash})
         string(TOLOWER "${project}${name_dashes}" name_var)
-        add_lit_target("check-${name_var}" "Running lit suite ${dir}"
-          ${dir}
+        add_lit_target("check-${name_var}" "Running lit suite ${lit_suite}"
+          ${lit_suite}
           PARAMS ${ARG_PARAMS}
           DEPENDS ${ARG_DEPENDS}
           ARGS ${ARG_ARGS}