1 # RUN: llc -march=amdgcn -mcpu=tonga %s -start-before detect-dead-lanes -stop-before machine-scheduler -verify-machineinstrs -o - | FileCheck -check-prefix=GCN %s
3 # GCN-LABEL: name: dead_lane
5 # GCN-NEXT: undef %3.sub0:vreg_64 = V_MAC_F32_e32 undef %1:vgpr_32, undef %1:vgpr_32, undef %3.sub0, implicit $exec
6 # GCN-NEXT: FLAT_STORE_DWORD undef %4:vreg_64, %3.sub0,
9 tracksRegLiveness: true
12 %1:vgpr_32 = V_MAC_F32_e32 undef %0:vgpr_32, undef %0:vgpr_32, undef %0:vgpr_32, implicit $exec
13 %2:vgpr_32 = V_MAC_F32_e32 undef %0:vgpr_32, undef %0:vgpr_32, undef %0:vgpr_32, implicit $exec
14 %3:vreg_64 = REG_SEQUENCE %1:vgpr_32, %subreg.sub0, %2:vgpr_32, %subreg.sub1
15 FLAT_STORE_DWORD undef %4:vreg_64, %3.sub0, 0, 0, 0, 0, implicit $exec, implicit $flat_scr