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# RUN: llc -march=amdgcn -mcpu=gfx1010 -start-before=greedy -verify-machineinstrs -o - %s | FileCheck -check-prefix=GCN %s
...
# GCN-LABEL: {{^}}"subvector-basic-bb"
# GCN: s_subvector_loop_begin [[RS:s[0-9]]], BB0_2
# GCN: s_subvector_loop_end [[RS]], BB0_1
name: subvector-basic-bb
tracksRegLiveness: true
machineFunctionInfo:
scratchRSrcReg: $sgpr0_sgpr1_sgpr2_sgpr3
scratchWaveOffsetReg: $sgpr4
frameOffsetReg: $sgpr5
stackPtrOffsetReg: $sgpr32
body: |
bb.0:
liveins: $sgpr0_sgpr1
successors: %bb.1, %bb.2
%1:sgpr_64 = COPY $sgpr0_sgpr1
%4:sreg_128 = S_LOAD_DWORDX4_IMM %1, 36, 0, 0
%11:sreg_64_xexec = S_LOAD_DWORDX2_IMM %4.sub2_sub3, 0, 0, 0
undef %15.sub0:vreg_64 = COPY %4.sub0
%15.sub1:vreg_64 = COPY %4.sub1
%16:vgpr_32 = COPY %1.sub0
S_SUBVECTOR_LOOP_BEGIN %bb.2, undef %19:sreg_32, implicit-def $exec, implicit $exec, implicit-def %19
bb.1:
successors: %bb.1, %bb.2
%14:sreg_32_xm0 = S_ADD_I32 %11.sub0, %11.sub1, implicit-def dead $scc
%16:vgpr_32 = COPY %14
S_SUBVECTOR_LOOP_END %bb.1, %19:sreg_32, implicit-def $exec, implicit $exec, implicit-def %19
bb.2:
GLOBAL_STORE_DWORD %15, %16, 0, 0, 0, 0, implicit $exec
S_ENDPGM 0
...
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