[SPECCPU2017] Check for 'all' input data directory before generating command

Summary: As of SPEC CPU2017 1.0.5, 526.blender_r/data does not contain an 'all' subdirectory, which breaks the build.

Reviewers: Meinersbur, MatzeB

Subscribers: mgorny, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D68967

llvm-svn: 375480
diff --git a/External/SPEC/SpecCPU2017.cmake b/External/SPEC/SpecCPU2017.cmake
index dbdecf7..88a81be 100644
--- a/External/SPEC/SpecCPU2017.cmake
+++ b/External/SPEC/SpecCPU2017.cmake
@@ -344,7 +344,9 @@
 # file as an absolute path to the rundir.
 macro(speccpu2017_prepare_rundir)
   foreach (_runtype IN LISTS TEST_SUITE_RUN_TYPE)
-    llvm_copy_dir(${PROG} "${RUN_${_runtype}_DIR}" "${INPUT_all_DIR}")
+    if (EXISTS "${INPUT_all_DIR}")
+      llvm_copy_dir(${PROG} "${RUN_${_runtype}_DIR}" "${INPUT_all_DIR}")
+    endif ()
     llvm_copy_dir(${PROG} "${RUN_${_runtype}_DIR}" "${INPUT_${_runtype}_DIR}")
   endforeach ()
 endmacro()