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/llvm.amdgcn.cubesc.ll b/llvm/test/CodeGen/AMDGPU/llvm.amdgcn.cubesc.ll
index a3ba327..10669cf 100644
--- a/llvm/test/CodeGen/AMDGPU/llvm.amdgcn.cubesc.ll
+++ b/llvm/test/CodeGen/AMDGPU/llvm.amdgcn.cubesc.ll
@@ -5,7 +5,7 @@
 
 ; GCN-LABEL: {{^}}test_cubesc:
 ; GCN: v_cubesc_f32 v{{[0-9]+}}, s{{[0-9]+}}, v{{[0-9]+}}, v{{[0-9]+}}
-define void @test_cubesc(float addrspace(1)* %out, float %a, float %b, float %c) #1 {
+define amdgpu_kernel void @test_cubesc(float addrspace(1)* %out, float %a, float %b, float %c) #1 {
   %result = call float @llvm.amdgcn.cubesc(float %a, float %b, float %c)
   store float %result, float addrspace(1)* %out
   ret void