AMDGPU: Define a schedule class for COPY.

COPY was lacking a scheduling class, define it to avoid regressions in
the upcoming change to the bidirectional MachineScheduler. Approved by
tstellar on IRC.

Differential Revision: http://reviews.llvm.org/D21540

llvm-svn: 273751
diff --git a/llvm/test/CodeGen/AMDGPU/schedule-kernel-arg-loads.ll b/llvm/test/CodeGen/AMDGPU/schedule-kernel-arg-loads.ll
index fb33be8..886d4a1 100644
--- a/llvm/test/CodeGen/AMDGPU/schedule-kernel-arg-loads.ll
+++ b/llvm/test/CodeGen/AMDGPU/schedule-kernel-arg-loads.ll
@@ -5,13 +5,13 @@
 ; FIXME: Due to changes in the load clustering heuristics.  We no longer
 ;        cluster all argument loads together on SI.
 ; SI: s_load_dword s{{[0-9]+}}, s{{\[[0-9]+:[0-9]+\]}}, 0xd
-; SI-NEXT: s_load_dword s{{[0-9]+}}, s{{\[[0-9]+:[0-9]+\]}}, 0xe
 ; SI: s_load_dwordx2 s{{\[[0-9]+:[0-9]+\]}}, s{{\[[0-9]+:[0-9]+\]}}, 0x9
 ; SI-NEXT: s_load_dwordx2 s{{\[[0-9]+:[0-9]+\]}}, s{{\[[0-9]+:[0-9]+\]}}, 0xb
+; SI-NEXT: s_load_dword s{{[0-9]+}}, s{{\[[0-9]+:[0-9]+\]}}, 0xe
 ; VI: s_load_dword s{{[0-9]+}}, s{{\[[0-9]+:[0-9]+\]}}, 0x34
-; VI: s_load_dword s{{[0-9]+}}, s{{\[[0-9]+:[0-9]+\]}}, 0x38
 ; VI: s_load_dwordx2 s{{\[[0-9]+:[0-9]+\]}}, s{{\[[0-9]+:[0-9]+\]}}, 0x24
 ; VI: s_load_dwordx2 s{{\[[0-9]+:[0-9]+\]}}, s{{\[[0-9]+:[0-9]+\]}}, 0x2c
+; VI: s_load_dword s{{[0-9]+}}, s{{\[[0-9]+:[0-9]+\]}}, 0x38
 define void @cluster_arg_loads(i32 addrspace(1)* %out0, i32 addrspace(1)* %out1, i32 %x, i32 %y) nounwind {
   store i32 %x, i32 addrspace(1)* %out0, align 4
   store i32 %y, i32 addrspace(1)* %out1, align 4