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/dagcombine-reassociate-bug.ll b/llvm/test/CodeGen/AMDGPU/dagcombine-reassociate-bug.ll
index a32c16d..11acbc2 100644
--- a/llvm/test/CodeGen/AMDGPU/dagcombine-reassociate-bug.ll
+++ b/llvm/test/CodeGen/AMDGPU/dagcombine-reassociate-bug.ll
@@ -9,7 +9,7 @@
 ; CHECK: buffer_store_dword v{{[0-9]+}}, [[VADDR]], [[SADDR]]
 ; CHECK: buffer_store_dword v{{[0-9]+}}, [[VADDR]], [[SADDR]]
 
-define void @store_same_base_ptr(i32 addrspace(1)* %out) {
+define amdgpu_kernel void @store_same_base_ptr(i32 addrspace(1)* %out) {
 entry:
   %id = call i32 @llvm.amdgcn.workitem.id.x() #0
   %offset = sext i32 %id to i64