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.fdiv.fast.ll b/llvm/test/CodeGen/AMDGPU/llvm.amdgcn.fdiv.fast.ll
index 54d7848..248ee99 100644
--- a/llvm/test/CodeGen/AMDGPU/llvm.amdgcn.fdiv.fast.ll
+++ b/llvm/test/CodeGen/AMDGPU/llvm.amdgcn.fdiv.fast.ll
@@ -8,7 +8,7 @@
 ; CHECK: v_rcp_f32_e32
 ; CHECK: v_mul_f32_e32
 ; CHECK: v_mul_f32_e32
-define void @test_fdiv_fast(float addrspace(1)* %out, float %a, float %b) #1 {
+define amdgpu_kernel void @test_fdiv_fast(float addrspace(1)* %out, float %a, float %b) #1 {
   %fdiv = call float @llvm.amdgcn.fdiv.fast(float %a, float %b)
   store float %fdiv, float addrspace(1)* %out
   ret void