[clang] 7a228f8 - [openmp] No longer use LIBRARY_PATH to find devicertl

[Jon Chesterfield via cfe-commits]

Author: Jon Chesterfield
Date: 2021-09-01T20:24:34+01:00
New Revision: 7a228f872fbbefa6a6eba1d51da192761879fcca

URL: https://github.com/llvm/llvm-project/commit/7a228f872fbbefa6a6eba1d51da192761879fcca
DIFF: https://github.com/llvm/llvm-project/commit/7a228f872fbbefa6a6eba1d51da192761879fcca.diff

LOG: [openmp] No longer use LIBRARY_PATH to find devicertl

Given D109057, change test runner to use the libomptarget-x-bc-path
argument instead of the LIBRARY_PATH environment variable to find the device
library.

Also drop the use of LIBRARY_PATH environment variable as it is far
too easy to pull in the device library from an unrelated toolchain by accident
with the current setup. No loss in flexibility to developers as the clang
commandline used here is still available.

Reviewed By: jdoerfert

Differential Revision: https://reviews.llvm.org/D109061

Added: 
    

Modified: 
    clang/lib/Driver/ToolChains/CommonArgs.cpp
    openmp/libomptarget/test/lit.cfg

Removed: 
    


################################################################################
diff  --git a/clang/lib/Driver/ToolChains/CommonArgs.cpp b/clang/lib/Driver/ToolChains/CommonArgs.cpp
index 7c7f4d63eca0d..fb1aea20acc33 100644
--- a/clang/lib/Driver/ToolChains/CommonArgs.cpp
+++ b/clang/lib/Driver/ToolChains/CommonArgs.cpp
@@ -1688,18 +1688,8 @@ void tools::addOpenMPDeviceRTL(const Driver &D,
                                StringRef BitcodeSuffix,
                                const llvm::Triple &Triple) {
   SmallVector<StringRef, 8> LibraryPaths;
-  // Add user defined library paths from LIBRARY_PATH.
-  llvm::Optional<std::string> LibPath =
-      llvm::sys::Process::GetEnv("LIBRARY_PATH");
-  if (LibPath) {
-    SmallVector<StringRef, 8> Frags;
-    const char EnvPathSeparatorStr[] = {llvm::sys::EnvPathSeparator, '\0'};
-    llvm::SplitString(*LibPath, Frags, EnvPathSeparatorStr);
-    for (StringRef Path : Frags)
-      LibraryPaths.emplace_back(Path.trim());
-  }
-
-  // Add path to lib / lib64 folder.
+
+  // Add path to clang lib / lib64 folder.
   SmallString<256> DefaultLibPath = llvm::sys::path::parent_path(D.Dir);
   llvm::sys::path::append(DefaultLibPath, Twine("lib") + CLANG_LIBDIR_SUFFIX);
   LibraryPaths.emplace_back(DefaultLibPath.c_str());

diff  --git a/openmp/libomptarget/test/lit.cfg b/openmp/libomptarget/test/lit.cfg
index d4f63dd6c6de2..b47e16c4be918 100644
--- a/openmp/libomptarget/test/lit.cfg
+++ b/openmp/libomptarget/test/lit.cfg
@@ -92,6 +92,10 @@ else: # Unices
     append_dynamic_library_path('LIBRARY_PATH', config.library_dir, ":")
     append_dynamic_library_path('LIBRARY_PATH', \
         config.omp_host_rtl_directory, ":")
+    if config.libomptarget_current_target.startswith('amdgcn'):
+        config.test_flags += " --libomptarget-amdgcn-bc-path=" + config.library_dir
+    if config.libomptarget_current_target.startswith('nvptx'):
+        config.test_flags += " --libomptarget-nvptx-bc-path=" + config.library_dir
 
 # substitutions
 # - for targets that exist in the system create the actual command.