[AMDGPU] Enable the implicit arguments for HIP (CLANG)

Enable 48-bytes of implicit arguments for HIP as well. Earlier it was enabled for OpenCL. This code is specific to AMDGPU target.

Differential Revision: https://reviews.llvm.org/D62244

llvm-svn: 363414
diff --git a/clang/lib/CodeGen/TargetInfo.cpp b/clang/lib/CodeGen/TargetInfo.cpp
index f39764d..4ef5778 100644
--- a/clang/lib/CodeGen/TargetInfo.cpp
+++ b/clang/lib/CodeGen/TargetInfo.cpp
@@ -7868,7 +7868,8 @@
   const auto *ReqdWGS = M.getLangOpts().OpenCL ?
     FD->getAttr<ReqdWorkGroupSizeAttr>() : nullptr;
 
-  if (M.getLangOpts().OpenCL && FD->hasAttr<OpenCLKernelAttr>() &&
+  if (((M.getLangOpts().OpenCL && FD->hasAttr<OpenCLKernelAttr>()) ||
+      (M.getLangOpts().HIP && FD->hasAttr<CUDAGlobalAttr>())) &&
       (M.getTriple().getOS() == llvm::Triple::AMDHSA))
     F->addFnAttr("amdgpu-implicitarg-num-bytes", "48");