# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
# RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx908 -start-before=greedy,0 -stop-after=virtregrewriter,0 -o -  %s | FileCheck %s

# This testcase used to fail due to introducing a spill of an SGPR
# 1024 for every subregister use inside the loop. With overlapping
# unspillable split ranges, it wasn't able to allocate one of the
# tuples. We avoid this by ensuring wide tuples are always allocated
# first (although the allocator should probably have been smart enough
# to handle this without that hint. Ideally it would understand we
# only need to spill/restore single subregisters at a time).

---
name:            greedy_fail_alloc_sgpr1024_spill
tracksRegLiveness: true
frameInfo:
  hasCalls:        true
machineFunctionInfo:
  explicitKernArgSize: 16
  maxKernArgAlign: 8
  isEntryFunction: true
  waveLimiter:     true
  scratchRSrcReg:  '$sgpr0_sgpr1_sgpr2_sgpr3'
  stackPtrOffsetReg: '$sgpr32'
  occupancy:       6
body:             |
  ; CHECK-LABEL: name: greedy_fail_alloc_sgpr1024_spill
  ; CHECK: bb.0:
  ; CHECK-NEXT:   successors: %bb.1(0x80000000)
  ; CHECK-NEXT:   liveins: $sgpr14, $sgpr15, $vgpr0, $vgpr1, $vgpr2, $sgpr4_sgpr5, $sgpr6_sgpr7, $sgpr8_sgpr9, $sgpr10_sgpr11
  ; CHECK-NEXT: {{  $}}
  ; CHECK-NEXT:   renamable $sgpr34_sgpr35 = COPY $sgpr8_sgpr9
  ; CHECK-NEXT:   renamable $sgpr33 = COPY $sgpr15
  ; CHECK-NEXT:   renamable $sgpr42 = COPY $sgpr14
  ; CHECK-NEXT:   renamable $sgpr36_sgpr37 = COPY $sgpr10_sgpr11
  ; CHECK-NEXT:   renamable $sgpr38_sgpr39 = COPY $sgpr6_sgpr7
  ; CHECK-NEXT:   renamable $sgpr40_sgpr41 = COPY $sgpr4_sgpr5
  ; CHECK-NEXT:   renamable $sgpr66_sgpr67 = S_LOAD_DWORDX2_IMM renamable $sgpr34_sgpr35, 0, 0 :: (dereferenceable invariant load (s64), align 16, addrspace 4)
  ; CHECK-NEXT:   renamable $sgpr44 = S_MOV_B32 0
  ; CHECK-NEXT:   renamable $sgpr45 = S_MOV_B32 0
  ; CHECK-NEXT:   renamable $sgpr46 = S_MOV_B32 0
  ; CHECK-NEXT:   renamable $sgpr47 = S_MOV_B32 0
  ; CHECK-NEXT:   renamable $sgpr48 = S_MOV_B32 0
  ; CHECK-NEXT:   renamable $sgpr49 = S_MOV_B32 0
  ; CHECK-NEXT:   renamable $sgpr50 = S_MOV_B32 0
  ; CHECK-NEXT:   renamable $sgpr51 = S_MOV_B32 0
  ; CHECK-NEXT:   renamable $sgpr52 = S_MOV_B32 0
  ; CHECK-NEXT:   renamable $sgpr53 = S_MOV_B32 0
  ; CHECK-NEXT:   renamable $sgpr54 = S_MOV_B32 0
  ; CHECK-NEXT:   renamable $sgpr55 = S_MOV_B32 0
  ; CHECK-NEXT:   renamable $sgpr56 = S_MOV_B32 0
  ; CHECK-NEXT:   renamable $sgpr57 = S_MOV_B32 0
  ; CHECK-NEXT:   renamable $sgpr58 = S_MOV_B32 0
  ; CHECK-NEXT:   renamable $sgpr59 = S_MOV_B32 0
  ; CHECK-NEXT:   renamable $sgpr60 = S_MOV_B32 0
  ; CHECK-NEXT:   renamable $sgpr61 = S_MOV_B32 0
  ; CHECK-NEXT:   renamable $sgpr62 = S_MOV_B32 0
  ; CHECK-NEXT:   renamable $sgpr63 = S_MOV_B32 0
  ; CHECK-NEXT:   renamable $sgpr64 = S_MOV_B32 0
  ; CHECK-NEXT:   renamable $sgpr68_sgpr69 = IMPLICIT_DEF
  ; CHECK-NEXT:   ADJCALLSTACKUP 0, 0, implicit-def dead $scc, implicit-def $sgpr32, implicit $sgpr32
  ; CHECK-NEXT:   dead $sgpr30_sgpr31 = SI_CALL renamable $sgpr68_sgpr69, 0, csr_amdgpu, implicit $sgpr0_sgpr1_sgpr2_sgpr3
  ; CHECK-NEXT:   ADJCALLSTACKDOWN 0, 0, implicit-def dead $scc, implicit-def $sgpr32, implicit $sgpr32
  ; CHECK-NEXT:   ADJCALLSTACKUP 0, 0, implicit-def dead $scc, implicit-def $sgpr32, implicit $sgpr32
  ; CHECK-NEXT:   $sgpr4_sgpr5 = COPY killed renamable $sgpr40_sgpr41
  ; CHECK-NEXT:   $sgpr6_sgpr7 = COPY killed renamable $sgpr38_sgpr39
  ; CHECK-NEXT:   $sgpr8_sgpr9 = COPY killed renamable $sgpr34_sgpr35
  ; CHECK-NEXT:   $sgpr10_sgpr11 = COPY killed renamable $sgpr36_sgpr37
  ; CHECK-NEXT:   $sgpr12 = COPY killed renamable $sgpr42
  ; CHECK-NEXT:   $sgpr13 = COPY killed renamable $sgpr33
  ; CHECK-NEXT:   dead $sgpr30_sgpr31 = SI_CALL killed renamable $sgpr68_sgpr69, 0, csr_amdgpu, implicit $sgpr4_sgpr5, implicit $sgpr6_sgpr7, implicit $sgpr8_sgpr9, implicit $sgpr10_sgpr11, implicit killed $sgpr12, implicit killed $sgpr13, implicit $sgpr0_sgpr1_sgpr2_sgpr3
  ; CHECK-NEXT:   ADJCALLSTACKDOWN 0, 0, implicit-def dead $scc, implicit-def $sgpr32, implicit $sgpr32
  ; CHECK-NEXT:   renamable $sgpr4_sgpr5 = COPY $exec, implicit-def $exec
  ; CHECK-NEXT:   dead renamable $sgpr6_sgpr7 = IMPLICIT_DEF
  ; CHECK-NEXT: {{  $}}
  ; CHECK-NEXT: bb.1:
  ; CHECK-NEXT:   successors: %bb.2(0x40000000), %bb.4(0x40000000)
  ; CHECK-NEXT:   liveins: $sgpr4_sgpr5, $sgpr66_sgpr67:0x000000000000000F, $sgpr44_sgpr45_sgpr46_sgpr47_sgpr48_sgpr49_sgpr50_sgpr51_sgpr52_sgpr53_sgpr54_sgpr55_sgpr56_sgpr57_sgpr58_sgpr59_sgpr60_sgpr61_sgpr62_sgpr63_sgpr64_sgpr65_sgpr66_sgpr67_sgpr68_sgpr69_sgpr70_sgpr71_sgpr72_sgpr73_sgpr74_sgpr75:0x000003FFFFFFFFFF
  ; CHECK-NEXT: {{  $}}
  ; CHECK-NEXT:   renamable $sgpr6_sgpr7 = COPY $exec, implicit-def $exec
  ; CHECK-NEXT:   S_CBRANCH_EXECZ %bb.4, implicit $exec
  ; CHECK-NEXT: {{  $}}
  ; CHECK-NEXT: bb.2:
  ; CHECK-NEXT:   successors: %bb.3(0x80000000)
  ; CHECK-NEXT:   liveins: $sgpr4_sgpr5, $sgpr66_sgpr67:0x000000000000000F, $sgpr44_sgpr45_sgpr46_sgpr47_sgpr48_sgpr49_sgpr50_sgpr51_sgpr52_sgpr53_sgpr54_sgpr55_sgpr56_sgpr57_sgpr58_sgpr59_sgpr60_sgpr61_sgpr62_sgpr63_sgpr64_sgpr65_sgpr66_sgpr67_sgpr68_sgpr69_sgpr70_sgpr71_sgpr72_sgpr73_sgpr74_sgpr75:0x000003FFFFFFFFFF
  ; CHECK-NEXT: {{  $}}
  ; CHECK-NEXT:   [[COPY:%[0-9]+]]:vreg_1024 = COPY renamable $sgpr44_sgpr45_sgpr46_sgpr47_sgpr48_sgpr49_sgpr50_sgpr51_sgpr52_sgpr53_sgpr54_sgpr55_sgpr56_sgpr57_sgpr58_sgpr59_sgpr60_sgpr61_sgpr62_sgpr63_sgpr64_sgpr65_sgpr66_sgpr67_sgpr68_sgpr69_sgpr70_sgpr71_sgpr72_sgpr73_sgpr74_sgpr75
  ; CHECK-NEXT:   renamable $sgpr6 = S_LSHL_B32 renamable $sgpr67, 1, implicit-def dead $scc
  ; CHECK-NEXT:   dead [[COPY]]:vreg_1024 = V_INDIRECT_REG_WRITE_GPR_IDX_B32_V32 [[COPY]], 0, killed $sgpr6, 3, implicit-def $m0, implicit $m0, implicit $exec
  ; CHECK-NEXT: {{  $}}
  ; CHECK-NEXT: bb.3:
  ; CHECK-NEXT:   successors: %bb.5(0x40000000), %bb.1(0x40000000)
  ; CHECK-NEXT:   liveins: $sgpr4_sgpr5, $sgpr66_sgpr67:0x000000000000000F, $sgpr44_sgpr45_sgpr46_sgpr47_sgpr48_sgpr49_sgpr50_sgpr51_sgpr52_sgpr53_sgpr54_sgpr55_sgpr56_sgpr57_sgpr58_sgpr59_sgpr60_sgpr61_sgpr62_sgpr63_sgpr64_sgpr65_sgpr66_sgpr67_sgpr68_sgpr69_sgpr70_sgpr71_sgpr72_sgpr73_sgpr74_sgpr75:0x000003FFFFFFFFFF
  ; CHECK-NEXT: {{  $}}
  ; CHECK-NEXT:   renamable $sgpr6_sgpr7 = S_OR_SAVEEXEC_B64 renamable $sgpr4_sgpr5, implicit-def $exec, implicit-def $scc, implicit $exec
  ; CHECK-NEXT:   renamable $sgpr68 = COPY renamable $sgpr44
  ; CHECK-NEXT:   renamable $sgpr69 = COPY renamable $sgpr44
  ; CHECK-NEXT:   renamable $sgpr70 = COPY renamable $sgpr44
  ; CHECK-NEXT:   renamable $sgpr71 = COPY renamable $sgpr44
  ; CHECK-NEXT:   renamable $sgpr72 = COPY renamable $sgpr44
  ; CHECK-NEXT:   renamable $sgpr73 = COPY renamable $sgpr44
  ; CHECK-NEXT:   renamable $sgpr74 = COPY renamable $sgpr44
  ; CHECK-NEXT:   renamable $sgpr75 = COPY renamable $sgpr44
  ; CHECK-NEXT:   renamable $sgpr76 = COPY renamable $sgpr44
  ; CHECK-NEXT:   renamable $sgpr77 = COPY renamable $sgpr44
  ; CHECK-NEXT:   renamable $sgpr78 = COPY renamable $sgpr44
  ; CHECK-NEXT:   renamable $sgpr79 = COPY renamable $sgpr44
  ; CHECK-NEXT:   renamable $sgpr80 = COPY renamable $sgpr44
  ; CHECK-NEXT:   renamable $sgpr81 = COPY renamable $sgpr44
  ; CHECK-NEXT:   renamable $sgpr82 = COPY renamable $sgpr44
  ; CHECK-NEXT:   renamable $sgpr83 = COPY renamable $sgpr44
  ; CHECK-NEXT:   renamable $sgpr84 = COPY renamable $sgpr44
  ; CHECK-NEXT:   renamable $sgpr85 = COPY renamable $sgpr44
  ; CHECK-NEXT:   renamable $sgpr86 = COPY renamable $sgpr44
  ; CHECK-NEXT:   renamable $sgpr87 = COPY renamable $sgpr44
  ; CHECK-NEXT:   renamable $sgpr88 = COPY renamable $sgpr44
  ; CHECK-NEXT:   renamable $sgpr89 = COPY renamable $sgpr44
  ; CHECK-NEXT:   dead %18:vreg_1024 = COPY renamable $sgpr68_sgpr69_sgpr70_sgpr71_sgpr72_sgpr73_sgpr74_sgpr75_sgpr76_sgpr77_sgpr78_sgpr79_sgpr80_sgpr81_sgpr82_sgpr83_sgpr84_sgpr85_sgpr86_sgpr87_sgpr88_sgpr89_sgpr90_sgpr91_sgpr92_sgpr93_sgpr94_sgpr95_sgpr96_sgpr97_sgpr98_sgpr99, implicit $exec
  ; CHECK-NEXT:   $exec = S_XOR_B64_term $exec, killed renamable $sgpr6_sgpr7, implicit-def $scc
  ; CHECK-NEXT:   S_CBRANCH_EXECZ %bb.5, implicit $exec
  ; CHECK-NEXT:   S_BRANCH %bb.1
  ; CHECK-NEXT: {{  $}}
  ; CHECK-NEXT: bb.4:
  ; CHECK-NEXT:   successors: %bb.5(0x80000000)
  ; CHECK-NEXT:   liveins: $sgpr6_sgpr7, $sgpr66_sgpr67:0x0000000000000003, $sgpr44_sgpr45_sgpr46_sgpr47_sgpr48_sgpr49_sgpr50_sgpr51_sgpr52_sgpr53_sgpr54_sgpr55_sgpr56_sgpr57_sgpr58_sgpr59_sgpr60_sgpr61_sgpr62_sgpr63_sgpr64_sgpr65_sgpr66_sgpr67_sgpr68_sgpr69_sgpr70_sgpr71_sgpr72_sgpr73_sgpr74_sgpr75:0x000003FFFFFFFFFF
  ; CHECK-NEXT: {{  $}}
  ; CHECK-NEXT:   $exec = S_OR_B64 $exec, killed renamable $sgpr6_sgpr7, implicit-def $scc
  ; CHECK-NEXT:   dead renamable $sgpr4 = S_LSHL_B32 killed renamable $sgpr66, 1, implicit-def dead $scc
  ; CHECK-NEXT:   dead %16:vreg_1024 = COPY renamable $sgpr44_sgpr45_sgpr46_sgpr47_sgpr48_sgpr49_sgpr50_sgpr51_sgpr52_sgpr53_sgpr54_sgpr55_sgpr56_sgpr57_sgpr58_sgpr59_sgpr60_sgpr61_sgpr62_sgpr63_sgpr64_sgpr65_sgpr66_sgpr67_sgpr68_sgpr69_sgpr70_sgpr71_sgpr72_sgpr73_sgpr74_sgpr75
  ; CHECK-NEXT: {{  $}}
  ; CHECK-NEXT: bb.5:
  bb.0:
    liveins: $vgpr0, $vgpr1, $vgpr2, $sgpr4_sgpr5, $sgpr6_sgpr7, $sgpr8_sgpr9, $sgpr10_sgpr11, $sgpr14, $sgpr15

    %0:sgpr_64 = COPY $sgpr8_sgpr9
    %1:sgpr_32 = COPY $sgpr15
    %2:sgpr_32 = COPY $sgpr14
    %3:sgpr_64 = COPY $sgpr10_sgpr11
    %4:sgpr_64 = COPY $sgpr6_sgpr7
    %5:sgpr_64 = COPY $sgpr4_sgpr5
    %6:sreg_64_xexec = S_LOAD_DWORDX2_IMM %0, 0, 0 :: (dereferenceable invariant load (s64), align 16, addrspace 4)
    undef %7.sub0:sgpr_1024 = S_MOV_B32 0
    %7.sub1:sgpr_1024 = S_MOV_B32 0
    %7.sub2:sgpr_1024 = S_MOV_B32 0
    %7.sub3:sgpr_1024 = S_MOV_B32 0
    %7.sub4:sgpr_1024 = S_MOV_B32 0
    %7.sub5:sgpr_1024 = S_MOV_B32 0
    %7.sub6:sgpr_1024 = S_MOV_B32 0
    %7.sub7:sgpr_1024 = S_MOV_B32 0
    %7.sub8:sgpr_1024 = S_MOV_B32 0
    %7.sub9:sgpr_1024 = S_MOV_B32 0
    %7.sub10:sgpr_1024 = S_MOV_B32 0
    %7.sub11:sgpr_1024 = S_MOV_B32 0
    %7.sub12:sgpr_1024 = S_MOV_B32 0
    %7.sub13:sgpr_1024 = S_MOV_B32 0
    %7.sub14:sgpr_1024 = S_MOV_B32 0
    %7.sub15:sgpr_1024 = S_MOV_B32 0
    %7.sub16:sgpr_1024 = S_MOV_B32 0
    %7.sub17:sgpr_1024 = S_MOV_B32 0
    %7.sub18:sgpr_1024 = S_MOV_B32 0
    %7.sub19:sgpr_1024 = S_MOV_B32 0
    %7.sub20:sgpr_1024 = S_MOV_B32 0
    %8:sreg_64 = IMPLICIT_DEF
    ADJCALLSTACKUP 0, 0, implicit-def dead $scc, implicit-def $sgpr32, implicit $sgpr32
    dead $sgpr30_sgpr31 = SI_CALL %8, 0, csr_amdgpu, implicit $sgpr0_sgpr1_sgpr2_sgpr3
    ADJCALLSTACKDOWN 0, 0, implicit-def dead $scc, implicit-def $sgpr32, implicit $sgpr32
    ADJCALLSTACKUP 0, 0, implicit-def dead $scc, implicit-def $sgpr32, implicit $sgpr32
    $sgpr4_sgpr5 = COPY %5
    $sgpr6_sgpr7 = COPY %4
    $sgpr8_sgpr9 = COPY %0
    $sgpr10_sgpr11 = COPY %3
    $sgpr12 = COPY %2
    $sgpr13 = COPY %1
    dead $sgpr30_sgpr31 = SI_CALL %8, 0, csr_amdgpu, implicit $sgpr4_sgpr5, implicit $sgpr6_sgpr7, implicit $sgpr8_sgpr9, implicit $sgpr10_sgpr11, implicit killed $sgpr12, implicit killed $sgpr13, implicit $sgpr0_sgpr1_sgpr2_sgpr3
    ADJCALLSTACKDOWN 0, 0, implicit-def dead $scc, implicit-def $sgpr32, implicit $sgpr32
    %9:sreg_64 = COPY $exec, implicit-def $exec
    %10:sreg_64 = IMPLICIT_DEF

  bb.1:
    successors: %bb.2, %bb.4

    %11:sreg_64 = COPY $exec, implicit-def $exec
    S_CBRANCH_EXECZ %bb.4, implicit $exec

  bb.2:
    %12:vreg_1024 = COPY %7
    %13:sreg_32 = S_LSHL_B32 %6.sub1, 1, implicit-def dead $scc
    %12:vreg_1024 = V_INDIRECT_REG_WRITE_GPR_IDX_B32_V32 %12, 0, %13, 3, implicit-def $m0, implicit $m0, implicit $exec

  bb.3:
    %14:sreg_64 = S_OR_SAVEEXEC_B64 %9, implicit-def $exec, implicit-def $scc, implicit $exec
    undef %15.sub0:sgpr_1024 = COPY %7.sub0
    %15.sub1:sgpr_1024 = COPY %7.sub0
    %15.sub2:sgpr_1024 = COPY %7.sub0
    %15.sub3:sgpr_1024 = COPY %7.sub0
    %15.sub4:sgpr_1024 = COPY %7.sub0
    %15.sub5:sgpr_1024 = COPY %7.sub0
    %15.sub6:sgpr_1024 = COPY %7.sub0
    %15.sub7:sgpr_1024 = COPY %7.sub0
    %15.sub8:sgpr_1024 = COPY %7.sub0
    %15.sub9:sgpr_1024 = COPY %7.sub0
    %15.sub10:sgpr_1024 = COPY %7.sub0
    %15.sub11:sgpr_1024 = COPY %7.sub0
    %15.sub12:sgpr_1024 = COPY %7.sub0
    %15.sub13:sgpr_1024 = COPY %7.sub0
    %15.sub14:sgpr_1024 = COPY %7.sub0
    %15.sub15:sgpr_1024 = COPY %7.sub0
    %15.sub16:sgpr_1024 = COPY %7.sub0
    %15.sub17:sgpr_1024 = COPY %7.sub0
    %15.sub18:sgpr_1024 = COPY %7.sub0
    %15.sub19:sgpr_1024 = COPY %7.sub0
    %15.sub20:sgpr_1024 = COPY %7.sub0
    %15.sub21:sgpr_1024 = COPY %7.sub0
    ; Spill code ends up getting inserted here, and we end up with many unspillable sgpr1024 ranges
    %16:vreg_1024 = COPY %15, implicit $exec
    $exec = S_XOR_B64_term $exec, %14, implicit-def $scc
    S_CBRANCH_EXECZ %bb.5, implicit $exec
    S_BRANCH %bb.1

  bb.4:
    $exec = S_OR_B64 $exec, %11, implicit-def $scc
    %17:sreg_32 = S_LSHL_B32 %6.sub0, 1, implicit-def dead $scc
    %16:vreg_1024 = COPY %7

  bb.5:

...