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/cube.ll b/llvm/test/CodeGen/AMDGPU/cube.ll
index 3c126a4..7b5f1af 100644
--- a/llvm/test/CodeGen/AMDGPU/cube.ll
+++ b/llvm/test/CodeGen/AMDGPU/cube.ll
@@ -12,7 +12,7 @@
 ; GCN-DAG: v_cubetc_f32 v{{[0-9]+}}, s{{[0-9]+}}, v{{[0-9]+}}, v{{[0-9]+}}
 ; GCN-DAG: v_cubema_f32 v{{[0-9]+}}, s{{[0-9]+}}, v{{[0-9]+}}, v{{[0-9]+}}
 ; GCN: _store_dwordx4
-define void @cube(<4 x float> addrspace(1)* %out, float %a, float %b, float %c) #1 {
+define amdgpu_kernel void @cube(<4 x float> addrspace(1)* %out, float %a, float %b, float %c) #1 {
   %cubeid = call float @llvm.amdgcn.cubeid(float %a, float %b, float %c)
   %cubesc = call float @llvm.amdgcn.cubesc(float %a, float %b, float %c)
   %cubetc = call float @llvm.amdgcn.cubetc(float %a, float %b, float %c)