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.rint.f16.ll b/llvm/test/CodeGen/AMDGPU/llvm.rint.f16.ll
index c8c6e28..8f6007c 100644
--- a/llvm/test/CodeGen/AMDGPU/llvm.rint.f16.ll
+++ b/llvm/test/CodeGen/AMDGPU/llvm.rint.f16.ll
@@ -12,7 +12,7 @@
 ; VI:  v_rndne_f16_e32 v[[R_F16:[0-9]+]], v[[A_F16]]
 ; GCN: buffer_store_short v[[R_F16]]
 ; GCN: s_endpgm
-define void @rint_f16(
+define amdgpu_kernel void @rint_f16(
     half addrspace(1)* %r,
     half addrspace(1)* %a) {
 entry:
@@ -37,7 +37,7 @@
 ; GCN: v_or_b32_e32 v[[R_V2_F16:[0-9]+]], v[[R_F16_HI]], v[[R_F16_0]]
 ; GCN: buffer_store_dword v[[R_V2_F16]]
 ; GCN: s_endpgm
-define void @rint_v2f16(
+define amdgpu_kernel void @rint_v2f16(
     <2 x half> addrspace(1)* %r,
     <2 x half> addrspace(1)* %a) {
 entry: