| # NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py |
| # RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx900 -sgpr-regalloc=fast -start-before=regallocfast,0 -stop-before=greedy -o - %s | FileCheck %s |
| |
| # RegAllocFast was incorrectly dropping subregister indexes on |
| # unassigned virtual registers. Make sure they are passed through |
| # undisturbed to the second regalloc run. |
| |
| --- |
| name: func |
| alignment: 1 |
| tracksRegLiveness: true |
| machineFunctionInfo: |
| scratchRSrcReg: '$sgpr96_sgpr97_sgpr98_sgpr99' |
| stackPtrOffsetReg: '$sgpr32' |
| body: | |
| bb.0: |
| liveins: $vgpr0, $vgpr1_vgpr2 |
| |
| ; CHECK-LABEL: name: func |
| ; CHECK: liveins: $vgpr0, $vgpr1_vgpr2 |
| ; CHECK-NEXT: {{ $}} |
| ; CHECK-NEXT: undef %0.sub0:vreg_64 = COPY $vgpr0 |
| ; CHECK-NEXT: [[COPY:%[0-9]+]]:vreg_64 = COPY $vgpr1_vgpr2 |
| ; CHECK-NEXT: undef %2.sub1:vreg_64 = V_MOV_B32_e32 0, implicit $exec |
| ; CHECK-NEXT: undef %0.sub0:vreg_64, renamable $sgpr0_sgpr1 = V_ADD_CO_U32_e64 1, %0.sub0, 0, implicit $exec |
| ; CHECK-NEXT: undef %2.sub1:vreg_64, dead renamable $sgpr0_sgpr1 = V_ADDC_U32_e64 0, %2.sub1, killed $sgpr0_sgpr1, 0, implicit $exec |
| ; CHECK-NEXT: [[GLOBAL_LOAD_DWORDX2_:%[0-9]+]]:vreg_64 = GLOBAL_LOAD_DWORDX2 [[COPY]], 0, 0, implicit $exec |
| ; CHECK-NEXT: $vgpr0 = V_MOV_B32_e32 [[GLOBAL_LOAD_DWORDX2_]].sub0, implicit $exec |
| ; CHECK-NEXT: S_ENDPGM 0, implicit %0, implicit %2, implicit $vgpr0 |
| undef %0.sub0:vreg_64 = COPY $vgpr0 |
| %2:vreg_64 = COPY $vgpr1_vgpr2 |
| undef %1.sub1:vreg_64 = V_MOV_B32_e32 0, implicit $exec |
| undef %0.sub0:vreg_64, %3:sreg_64_xexec = V_ADD_CO_U32_e64 1, %0.sub0, 0, implicit $exec |
| undef %1.sub1:vreg_64, dead %4:sreg_64_xexec = V_ADDC_U32_e64 0, %1.sub1, %3, 0, implicit $exec |
| %5:vreg_64 = GLOBAL_LOAD_DWORDX2 %2, 0, 0, implicit $exec |
| $vgpr0 = V_MOV_B32_e32 %5.sub0, implicit $exec |
| S_ENDPGM 0, implicit %0, implicit %1, implicit $vgpr0 |
| |
| ... |
