r357520 - [HIP-Clang] Fat binary should not be produced for non GPU code

[Aaron Enye Shi via cfe-commits]

Author: aaronenyeshi
Date: Tue Apr  2 13:10:18 2019
New Revision: 357520

URL: http://llvm.org/viewvc/llvm-project?rev=357520&view=rev
Log:
[HIP-Clang] Fat binary should not be produced for non GPU code

Skip producing the fat binary functions for HIP when no device code is present.

Reviewers: yaxunl

Differential Review: https://reviews.llvm.org/D60141


Modified:
    cfe/trunk/lib/CodeGen/CGCUDANV.cpp
    cfe/trunk/test/CodeGenCUDA/device-stub.cu

Modified: cfe/trunk/lib/CodeGen/CGCUDANV.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGCUDANV.cpp?rev=357520&r1=357519&r2=357520&view=diff
==============================================================================
--- cfe/trunk/lib/CodeGen/CGCUDANV.cpp (original)
+++ cfe/trunk/lib/CodeGen/CGCUDANV.cpp Tue Apr  2 13:10:18 2019
@@ -472,6 +472,8 @@ llvm::Function *CGNVCUDARuntime::makeMod
   StringRef CudaGpuBinaryFileName = CGM.getCodeGenOpts().CudaGpuBinaryFileName;
   if (CudaGpuBinaryFileName.empty() && !IsHIP)
     return nullptr;
+  if (IsHIP && EmittedKernels.empty() && DeviceVars.empty())
+    return nullptr;
 
   // void __{cuda|hip}_register_globals(void* handle);
   llvm::Function *RegisterGlobalsFunc = makeRegisterGlobalsFn();

Modified: cfe/trunk/test/CodeGenCUDA/device-stub.cu
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGenCUDA/device-stub.cu?rev=357520&r1=357519&r2=357520&view=diff
==============================================================================
--- cfe/trunk/test/CodeGenCUDA/device-stub.cu (original)
+++ cfe/trunk/test/CodeGenCUDA/device-stub.cu Tue Apr  2 13:10:18 2019
@@ -228,13 +228,19 @@ void hostfunc(void) { kernelfunc<<<1, 1>
 // device-side globals, but we still need to register GPU binary.
 // Skip GPU binary string first.
 // CUDANOGLOBALS: @{{.*}} = private constant{{.*}}
-// HIPNOGLOBALS: @{{.*}} = internal constant{{.*}}
+// HIPNOGLOBALS-NOT: @{{.*}} = internal constant{{.*}}
 // NOGLOBALS-NOT: define internal void @__{{.*}}_register_globals
-// NOGLOBALS: define internal void @__[[PREFIX:cuda|hip]]_module_ctor
-// NOGLOBALS: call{{.*}}[[PREFIX]]RegisterFatBinary{{.*}}__[[PREFIX]]_fatbin_wrapper
+// CUDANOGLOBALS: define internal void @__[[PREFIX:cuda|hip]]_module_ctor
+// CUDANOGLOBALS: call{{.*}}[[PREFIX]]RegisterFatBinary{{.*}}__[[PREFIX]]_fatbin_wrapper
 // NOGLOBALS-NOT: call void @__[[PREFIX]]_register_globals
-// NOGLOBALS: define internal void @__[[PREFIX]]_module_dtor
-// NOGLOBALS: call void @__[[PREFIX]]UnregisterFatBinary
+// CUDANOGLOBALS: define internal void @__[[PREFIX]]_module_dtor
+// CUDANOGLOBALS: call void @__[[PREFIX]]UnregisterFatBinary
+
+// There should be no fat binary functions when no device-code is found for HIP.
+// HIPNOGLOBALS-NOT: define internal void @__[[PREFIX:cuda|hip]]_module_ctor
+// HIPNOGLOBALS-NOT: call{{.*}}[[PREFIX]]RegisterFatBinary{{.*}}__[[PREFIX]]_fatbin_wrapper
+// HIPNOGLOBALS-NOT: define internal void @__[[PREFIX]]_module_dtor
+// HIPNOGLOBALS-NOT: call void @__[[PREFIX]]UnregisterFatBinary
 
 // There should be no constructors/destructors if we have no GPU binary.
 // NOGPUBIN-NOT: define internal void @__[[PREFIX]]_register_globals