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# 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
...
|
