diff --git a/clang/lib/CodeGen/CGOpenMPRuntime.cpp b/clang/lib/CodeGen/CGOpenMPRuntime.cpp
--- a/clang/lib/CodeGen/CGOpenMPRuntime.cpp
+++ b/clang/lib/CodeGen/CGOpenMPRuntime.cpp
@@ -6471,6 +6471,8 @@
     OutlinedFnID = llvm::ConstantExpr::getBitCast(OutlinedFn, CGM.Int8PtrTy);
     OutlinedFn->setLinkage(llvm::GlobalValue::WeakAnyLinkage);
     OutlinedFn->setDSOLocal(false);
+    if (CGM.getTriple().isAMDGCN())
+      OutlinedFn->setCallingConv(llvm::CallingConv::AMDGPU_KERNEL);
   } else {
     std::string Name = getName({EntryFnName, "region_id"});
     OutlinedFnID = new llvm::GlobalVariable(
diff --git a/clang/test/OpenMP/amdgcn_target_codegen.cpp b/clang/test/OpenMP/amdgcn_target_codegen.cpp
--- a/clang/test/OpenMP/amdgcn_target_codegen.cpp
+++ b/clang/test/OpenMP/amdgcn_target_codegen.cpp
@@ -9,7 +9,7 @@
 #define N 1000
 
 int test_amdgcn_target_tid_threads() {
-// CHECK-LABEL: define weak void @{{.*}}test_amdgcn_target_tid_threads
+// CHECK-LABEL: define weak amdgpu_kernel void @{{.*}}test_amdgcn_target_tid_threads
 
   int arr[N];
 
@@ -26,7 +26,7 @@
 }
 
 int test_amdgcn_target_tid_threads_simd() {
-// CHECK-LABEL: define weak void @{{.*}}test_amdgcn_target_tid_threads_simd
+// CHECK-LABEL: define weak amdgpu_kernel void @{{.*}}test_amdgcn_target_tid_threads_simd
 
   int arr[N];