AMDGPU: Mark all unspecified CC functions in tests as amdgpu_kernel

Currently the default C calling convention functions are treated
the same as compute kernels. Make this explicit so the default
calling convention can be changed to a non-kernel.

Converted with perl -pi -e 's/define void/define amdgpu_kernel void/'
on the relevant test directories (and undoing in one place that actually
wanted a non-kernel).

llvm-svn: 298444
diff --git a/llvm/test/CodeGen/AMDGPU/invalid-addrspacecast.ll b/llvm/test/CodeGen/AMDGPU/invalid-addrspacecast.ll
index c29434f..31f2fbc 100644
--- a/llvm/test/CodeGen/AMDGPU/invalid-addrspacecast.ll
+++ b/llvm/test/CodeGen/AMDGPU/invalid-addrspacecast.ll
@@ -1,7 +1,7 @@
 ; RUN: not llc -march=amdgcn -mcpu=bonaire -mattr=-promote-alloca < %s 2>&1 | FileCheck -check-prefix=ERROR %s
 
 ; ERROR: error: <unknown>:0:0: in function use_group_to_global_addrspacecast void (i32 addrspace(3)*): invalid addrspacecast
-define void @use_group_to_global_addrspacecast(i32 addrspace(3)* %ptr) {
+define amdgpu_kernel void @use_group_to_global_addrspacecast(i32 addrspace(3)* %ptr) {
   %stof = addrspacecast i32 addrspace(3)* %ptr to i32 addrspace(1)*
   store volatile i32 0, i32 addrspace(1)* %stof
   ret void