test/CodeGen/AMDGPU/subreg-undef-def-with-other-subreg-defs.mir

# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
# RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx906 -verify-machineinstrs -run-pass=machine-scheduler -verify-misched -o - %s | FileCheck %s

# Deciding which lanes are killed needs to account for other defs in the
# instruction.
#
# addVRegDefDeps would encounter the %0.sub0 def and erase %0 from
# current vreg uses because it shared no lanes with %0.sub1 use on the
# nop. It then didn't see the lanemask when it reached the second
# subreg def, and failed to add the necessary dependency between the
# asm and S_NOP

---
name:            no_live_subrange_at_use
tracksRegLiveness: true
machineFunctionInfo:
  isEntryFunction: true
body:             |
  ; CHECK-LABEL: name: no_live_subrange_at_use
  ; CHECK: bb.0:
  ; CHECK:   successors: %bb.1(0x80000000)
  ; CHECK:   undef %0.sub0:vreg_64 = V_MOV_B32_e32 0, implicit $exec
  ; CHECK:   %0.sub1:vreg_64 = V_MOV_B32_e32 0, implicit $exec
  ; CHECK:   [[V_MOV_B32_e32_:%[0-9]+]]:vgpr_32 = V_MOV_B32_e32 0, implicit $exec
  ; CHECK: bb.1:
  ; CHECK:   successors: %bb.1(0x80000000)
  ; CHECK:   [[DS_READ_B32_gfx9_:%[0-9]+]]:vgpr_32 = DS_READ_B32_gfx9 [[V_MOV_B32_e32_]], 0, 0, implicit $exec :: (load 4, addrspace 3)
  ; CHECK:   INLINEASM &"", 1, 851978, def %0, 2147549193, %0(tied-def 3)
  ; CHECK:   INLINEASM &"", 1, 851977, [[DS_READ_B32_gfx9_]]
  ; CHECK:   INLINEASM &"", 1, 851978, def undef %0.sub0, 851978, def undef %0.sub1
  ; CHECK:   S_NOP 0, implicit %0.sub1
  ; CHECK:   $sgpr10 = S_MOV_B32 -1
  ; CHECK:   S_BRANCH %bb.1
  bb.0:
    undef %0.sub0:vreg_64 = V_MOV_B32_e32 0, implicit $exec
    %0.sub1:vreg_64 = V_MOV_B32_e32 0, implicit $exec
    %1:vgpr_32 = V_MOV_B32_e32 0, implicit $exec

  bb.1:
    %2:vgpr_32 = DS_READ_B32_gfx9 %1, 0, 0, implicit $exec :: (load 4, addrspace 3)
    INLINEASM &"", 1, 851978, def %0, 2147549193, %0(tied-def 3)
    INLINEASM &"", 1, 851977, %2
    INLINEASM &"", 1, 851978, def undef %0.sub0, 851978, def %0.sub1
    S_NOP 0, implicit %0.sub1
    $sgpr10 = S_MOV_B32 -1
    S_BRANCH %bb.1

...

# Different operand order
---
name:            no_live_subrange_at_use_swap
tracksRegLiveness: true
machineFunctionInfo:
  isEntryFunction: true
body:             |
  ; CHECK-LABEL: name: no_live_subrange_at_use_swap
  ; CHECK: bb.0:
  ; CHECK:   successors: %bb.1(0x80000000)
  ; CHECK:   undef %0.sub0:vreg_64 = V_MOV_B32_e32 0, implicit $exec
  ; CHECK:   %0.sub1:vreg_64 = V_MOV_B32_e32 0, implicit $exec
  ; CHECK:   [[V_MOV_B32_e32_:%[0-9]+]]:vgpr_32 = V_MOV_B32_e32 0, implicit $exec
  ; CHECK: bb.1:
  ; CHECK:   successors: %bb.1(0x80000000)
  ; CHECK:   [[DS_READ_B32_gfx9_:%[0-9]+]]:vgpr_32 = DS_READ_B32_gfx9 [[V_MOV_B32_e32_]], 0, 0, implicit $exec :: (load 4, addrspace 3)
  ; CHECK:   INLINEASM &"", 1, 851978, def %0, 2147549193, %0(tied-def 3)
  ; CHECK:   INLINEASM &"", 1, 851977, [[DS_READ_B32_gfx9_]]
  ; CHECK:   INLINEASM &"", 1, 851978, def undef %0.sub1, 851978, def undef %0.sub0
  ; CHECK:   S_NOP 0, implicit %0.sub1
  ; CHECK:   $sgpr10 = S_MOV_B32 -1
  ; CHECK:   S_BRANCH %bb.1
  bb.0:
    undef %0.sub0:vreg_64 = V_MOV_B32_e32 0, implicit $exec
    %0.sub1:vreg_64 = V_MOV_B32_e32 0, implicit $exec
    %1:vgpr_32 = V_MOV_B32_e32 0, implicit $exec

  bb.1:
    %2:vgpr_32 = DS_READ_B32_gfx9 %1, 0, 0, implicit $exec :: (load 4, addrspace 3)
    INLINEASM &"", 1, 851978, def %0, 2147549193, %0(tied-def 3)
    INLINEASM &"", 1, 851977, %2
    INLINEASM &"", 1, 851978, def %0.sub1, 851978, def undef %0.sub0
    S_NOP 0, implicit %0.sub1
    $sgpr10 = S_MOV_B32 -1
    S_BRANCH %bb.1

...