| # RUN: llc -mtriple=amdgcn-- -mcpu=gfx900 -run-pass=print-machine-uniformity -o - %s 2>&1 | FileCheck %s |
| |
| # readlane, readfirstlane is always uniform |
| |
| --- |
| name: readlane |
| machineFunctionInfo: |
| isEntryFunction: true |
| body: | |
| bb.0: |
| ; CHECK-LABEL: MachineUniformityInfo for function: readlane |
| ; CHECK-NEXT: ALL VALUES UNIFORM |
| %0:vgpr_32 = IMPLICIT_DEF |
| %1:vgpr_32 = IMPLICIT_DEF |
| %2:sgpr_32 = V_READFIRSTLANE_B32 %0, implicit $exec |
| %3:sgpr_32 = V_READLANE_B32 %1, 0, implicit $exec |
| $sgpr0 = V_READFIRSTLANE_B32 $vgpr0, implicit $exec |
| $sgpr1 = V_READLANE_B32 $vgpr1, $sgpr0, implicit $exec |
| S_ENDPGM 0 |
| ... |
| |
| # Readlane with physical register as operand |
| --- |
| name: readlane2 |
| machineFunctionInfo: |
| isEntryFunction: true |
| body: | |
| bb.0: |
| ; CHECK-LABEL: MachineUniformityInfo for function: readlane2 |
| ; CHECK-NEXT: ALL VALUES UNIFORM |
| %0:vgpr_32 = IMPLICIT_DEF |
| %1:vgpr_32 = IMPLICIT_DEF |
| %4:sgpr_32 = V_READLANE_B32 $vgpr0, 0, implicit $exec |
| $sgpr0 = V_READFIRSTLANE_B32 $vgpr0, implicit $exec |
| $sgpr1 = V_READLANE_B32 $vgpr1, $sgpr0, implicit $exec |
| %5:sgpr_32 = V_READFIRSTLANE_B32 $vgpr1, implicit $exec |
| S_ENDPGM 0 |
| ... |
| |
| |
| |
| # for copy operand src = sgpr -> uniform |
| --- |
| name: sgprcopy |
| tracksRegLiveness: true |
| machineFunctionInfo: |
| isEntryFunction: true |
| body: | |
| bb.0: |
| ; CHECK-LABEL: MachineUniformityInfo for function: sgprcopy |
| ; CHECK-NEXT: ALL VALUES UNIFORM |
| liveins: $sgpr0,$sgpr1,$vgpr0 |
| %0:sgpr_32 = COPY $sgpr0 |
| %1:vgpr_32 = COPY $sgpr1 |
| S_ENDPGM 0 |
| ... |