[CUDA][HIP] Emit dependent libs for host only

Recently D60274 was introduced to allow lld to handle dependent libs. However current
usage of dependent libs (e.g. pragma comment(lib, *) in windows header files) are intended
for host only. Emitting the metadata in device IR causes link error in device path.

Until there is a way to different it dependent libs for device or host, metadata for dependent
libs should be emitted for host only. This patch enforces that.

Differential Revision: https://reviews.llvm.org/D62483

llvm-svn: 361880

1 files changed, 6 insertions, 1 deletions

diff --git a/clang/lib/CodeGen/CodeGenModule.cpp b/clang/lib/CodeGen/CodeGenModule.cpp
index 6daea419281..8c9e240a680 100644
--- a/clang/lib/CodeGen/CodeGenModule.cpp
+++ b/clang/lib/CodeGen/CodeGenModule.cpp
@@ -457,7 +457,12 @@ void CodeGenModule::Release() {
   // that ELF linkers tend to handle libraries in a more complicated fashion
   // than on other platforms. This forces us to defer handling the dependent
   // libs to the linker.
-  if (!ELFDependentLibraries.empty()) {
+  //
+  // CUDA/HIP device and host libraries are different. Currently there is no
+  // way to differentiate dependent libraries for host or device. Existing
+  // usage of #pragma comment(lib, *) is intended for host libraries on
+  // Windows. Therefore emit llvm.dependent-libraries only for host.
+  if (!ELFDependentLibraries.empty() && !Context.getLangOpts().CUDAIsDevice) {
     auto *NMD = getModule().getOrInsertNamedMetadata("llvm.dependent-libraries");
     for (auto *MD : ELFDependentLibraries)
       NMD->addOperand(MD);