llvm-project/llvm/test/CodeGen/AMDGPU/fold-immediate-operand-shrink.mir

# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
# RUN: llc -mtriple=amdgcn-amd-amdhsa -verify-machineinstrs -run-pass si-fold-operands,dead-mi-elimination  %s -o - | FileCheck -check-prefix=GCN %s

---

name: shrink_scalar_imm_vgpr_v_add_i32_e64_no_carry_out_use
tracksRegLiveness: true

body:             |
  bb.0:
    ; GCN-LABEL: name: shrink_scalar_imm_vgpr_v_add_i32_e64_no_carry_out_use
    ; GCN: [[S_MOV_B32_:%[0-9]+]]:sreg_32_xm0 = S_MOV_B32 12345
    ; GCN: [[DEF:%[0-9]+]]:vgpr_32 = IMPLICIT_DEF
    ; GCN: [[V_ADD_I32_e32_:%[0-9]+]]:vgpr_32 = V_ADD_I32_e32 [[S_MOV_B32_]], [[DEF]], implicit-def $vcc, implicit $exec
    ; GCN: S_ENDPGM 0, implicit [[V_ADD_I32_e32_]]
    %0:sreg_32_xm0 = S_MOV_B32 12345
    %1:vgpr_32 = IMPLICIT_DEF
    %2:vgpr_32, %3:sreg_64 = V_ADD_I32_e64 %0, %1, 0, implicit $exec
    S_ENDPGM 0, implicit %2

...

---

name: shrink_vgpr_scalar_imm_v_add_i32_e64_no_carry_out_use
tracksRegLiveness: true

body:             |
  bb.0:
    ; GCN-LABEL: name: shrink_vgpr_scalar_imm_v_add_i32_e64_no_carry_out_use
    ; GCN: [[DEF:%[0-9]+]]:vgpr_32 = IMPLICIT_DEF
    ; GCN: [[S_MOV_B32_:%[0-9]+]]:sreg_32_xm0 = S_MOV_B32 12345
    ; GCN: [[V_ADD_I32_e32_:%[0-9]+]]:vgpr_32 = V_ADD_I32_e32 [[S_MOV_B32_]], [[DEF]], implicit-def $vcc, implicit $exec
    ; GCN: S_ENDPGM 0, implicit [[V_ADD_I32_e32_]]
    %0:vgpr_32 = IMPLICIT_DEF
    %1:sreg_32_xm0 = S_MOV_B32 12345
    %2:vgpr_32, %3:sreg_64 = V_ADD_I32_e64 %0, %1, 0, implicit $exec
    S_ENDPGM 0, implicit %2

...
---

name: shrink_scalar_imm_vgpr_v_add_i32_e64_carry_out_use
tracksRegLiveness: true

body:             |
  bb.0:
    ; GCN-LABEL: name: shrink_scalar_imm_vgpr_v_add_i32_e64_carry_out_use
    ; GCN: [[S_MOV_B32_:%[0-9]+]]:sreg_32_xm0 = S_MOV_B32 12345
    ; GCN: [[DEF:%[0-9]+]]:vgpr_32 = IMPLICIT_DEF
    ; GCN: [[V_ADD_I32_e32_:%[0-9]+]]:vgpr_32 = V_ADD_I32_e32 [[S_MOV_B32_]], [[DEF]], implicit-def $vcc, implicit $exec
    ; GCN: S_ENDPGM 0, implicit [[V_ADD_I32_e32_]]
    %0:sreg_32_xm0 = S_MOV_B32 12345
    %1:vgpr_32 = IMPLICIT_DEF
    %2:vgpr_32, %3:sreg_64 = V_ADD_I32_e64 %0, %1, 0, implicit $exec
    S_ENDPGM 0, implicit %2

...
---

# This does not shrink because it would violate the constant bus
# restriction. to have an SGPR input and an immediate, so a copy would
# be required.

name: shrink_vector_imm_sgpr_v_add_i32_e64_no_carry_out_use
tracksRegLiveness: true

body:             |
  bb.0:
    ; GCN-LABEL: name: shrink_vector_imm_sgpr_v_add_i32_e64_no_carry_out_use
    ; GCN: [[V_MOV_B32_e32_:%[0-9]+]]:vgpr_32 = V_MOV_B32_e32 12345, implicit $exec
    ; GCN: [[DEF:%[0-9]+]]:sreg_32_xm0 = IMPLICIT_DEF
    ; GCN: [[V_ADD_I32_e64_:%[0-9]+]]:vgpr_32, [[V_ADD_I32_e64_1:%[0-9]+]]:sreg_64 = V_ADD_I32_e64 [[DEF]], [[V_MOV_B32_e32_]], 0, implicit $exec
    ; GCN: S_ENDPGM 0, implicit [[V_ADD_I32_e64_]]
    %0:vgpr_32 = V_MOV_B32_e32 12345, implicit $exec
    %1:sreg_32_xm0 = IMPLICIT_DEF
    %2:vgpr_32, %3:sreg_64 = V_ADD_I32_e64 %0, %1, 0, implicit $exec
    S_ENDPGM 0, implicit %2

...

---

name: shrink_sgpr_vector_imm_v_add_i32_e64_no_carry_out_use
tracksRegLiveness: true

body:             |
  bb.0:
    ; GCN-LABEL: name: shrink_sgpr_vector_imm_v_add_i32_e64_no_carry_out_use
    ; GCN: [[DEF:%[0-9]+]]:sreg_32_xm0 = IMPLICIT_DEF
    ; GCN: [[V_MOV_B32_e32_:%[0-9]+]]:vgpr_32 = V_MOV_B32_e32 12345, implicit $exec
    ; GCN: [[V_ADD_I32_e64_:%[0-9]+]]:vgpr_32, [[V_ADD_I32_e64_1:%[0-9]+]]:sreg_64 = V_ADD_I32_e64 [[V_MOV_B32_e32_]], [[DEF]], 0, implicit $exec
    ; GCN: S_ENDPGM 0, implicit [[V_ADD_I32_e64_]]
    %0:sreg_32_xm0 = IMPLICIT_DEF
    %1:vgpr_32 = V_MOV_B32_e32 12345, implicit $exec
    %2:vgpr_32, %3:sreg_64 = V_ADD_I32_e64 %0, %1, 0, implicit $exec
    S_ENDPGM 0, implicit %2

...

---

name: shrink_scalar_imm_vgpr_v_add_i32_e64_live_vcc_use
tracksRegLiveness: true

body:             |
  bb.0:
    ; GCN-LABEL: name: shrink_scalar_imm_vgpr_v_add_i32_e64_live_vcc_use
    ; GCN: $vcc = S_MOV_B64 -1
    ; GCN: [[S_MOV_B32_:%[0-9]+]]:sreg_32_xm0 = S_MOV_B32 12345
    ; GCN: [[DEF:%[0-9]+]]:vgpr_32 = IMPLICIT_DEF
    ; GCN: [[V_ADD_I32_e64_:%[0-9]+]]:vgpr_32, [[V_ADD_I32_e64_1:%[0-9]+]]:sreg_64 = V_ADD_I32_e64 [[S_MOV_B32_]], [[DEF]], 0, implicit $exec
    ; GCN: S_ENDPGM 0, implicit [[V_ADD_I32_e64_]], implicit $vcc
    $vcc = S_MOV_B64 -1
    %0:sreg_32_xm0 = S_MOV_B32 12345
    %1:vgpr_32 = IMPLICIT_DEF
    %2:vgpr_32, %3:sreg_64 = V_ADD_I32_e64 %0, %1, 0, implicit $exec
    S_ENDPGM 0, implicit %2, implicit $vcc

...

---

name: shrink_scalar_imm_vgpr_v_add_i32_e64_liveout_vcc_use
tracksRegLiveness: true

body:             |
  ; GCN-LABEL: name: shrink_scalar_imm_vgpr_v_add_i32_e64_liveout_vcc_use
  ; GCN: bb.0:
  ; GCN:   successors: %bb.1(0x80000000)
  ; GCN:   $vcc = S_MOV_B64 -1
  ; GCN:   [[S_MOV_B32_:%[0-9]+]]:sreg_32_xm0 = S_MOV_B32 12345
  ; GCN:   [[DEF:%[0-9]+]]:vgpr_32 = IMPLICIT_DEF
  ; GCN:   [[V_ADD_I32_e64_:%[0-9]+]]:vgpr_32, [[V_ADD_I32_e64_1:%[0-9]+]]:sreg_64 = V_ADD_I32_e64 [[S_MOV_B32_]], [[DEF]], 0, implicit $exec
  ; GCN: bb.1:
  ; GCN:   liveins: $vcc
  ; GCN:   S_ENDPGM 0, implicit [[V_ADD_I32_e64_]], implicit $vcc
  bb.0:
    successors: %bb.1
    $vcc = S_MOV_B64 -1
    %0:sreg_32_xm0 = S_MOV_B32 12345
    %1:vgpr_32 = IMPLICIT_DEF
    %2:vgpr_32, %3:sreg_64 = V_ADD_I32_e64 %0, %1, 0, implicit $exec

  bb.1:
    liveins: $vcc
    S_ENDPGM 0, implicit %2, implicit $vcc

...
---

name: shrink_scalar_imm_vgpr_v_add_i32_e64_liveout_vcc_lo_use
tracksRegLiveness: true

body:             |
  ; GCN-LABEL: name: shrink_scalar_imm_vgpr_v_add_i32_e64_liveout_vcc_lo_use
  ; GCN: bb.0:
  ; GCN:   successors: %bb.1(0x80000000)
  ; GCN:   [[S_MOV_B32_:%[0-9]+]]:sreg_32_xm0 = S_MOV_B32 12345
  ; GCN:   [[DEF:%[0-9]+]]:vgpr_32 = IMPLICIT_DEF
  ; GCN:   [[V_ADD_I32_e64_:%[0-9]+]]:vgpr_32, [[V_ADD_I32_e64_1:%[0-9]+]]:sreg_64 = V_ADD_I32_e64 [[S_MOV_B32_]], [[DEF]], 0, implicit $exec
  ; GCN: bb.1:
  ; GCN:   liveins: $vcc_lo
  ; GCN:   S_ENDPGM 0, implicit [[V_ADD_I32_e64_]], implicit $vcc_lo
  bb.0:
    successors: %bb.1
    $vcc = S_MOV_B64 -1
    %0:sreg_32_xm0 = S_MOV_B32 12345
    %1:vgpr_32 = IMPLICIT_DEF
    %2:vgpr_32, %3:sreg_64 = V_ADD_I32_e64 %0, %1, 0, implicit $exec

  bb.1:
    liveins: $vcc_lo
    S_ENDPGM 0, implicit %2, implicit $vcc_lo

...
---

# This is not OK to clobber because vcc_lo has a livein use.

name: shrink_scalar_imm_vgpr_v_add_i32_e64_livein_vcc
tracksRegLiveness: true

body:             |
  ; GCN-LABEL: name: shrink_scalar_imm_vgpr_v_add_i32_e64_livein_vcc
  ; GCN: bb.0:
  ; GCN:   successors: %bb.1(0x80000000)
  ; GCN:   $vcc = S_MOV_B64 -1
  ; GCN: bb.1:
  ; GCN:   liveins: $vcc
  ; GCN:   [[S_MOV_B32_:%[0-9]+]]:sreg_32_xm0 = S_MOV_B32 12345
  ; GCN:   [[DEF:%[0-9]+]]:vgpr_32 = IMPLICIT_DEF
  ; GCN:   [[V_ADD_I32_e64_:%[0-9]+]]:vgpr_32, [[V_ADD_I32_e64_1:%[0-9]+]]:sreg_64 = V_ADD_I32_e64 [[S_MOV_B32_]], [[DEF]], 0, implicit $exec
  ; GCN:   S_ENDPGM 0, implicit [[V_ADD_I32_e64_]], implicit $vcc_lo
  bb.0:
    successors: %bb.1
    $vcc = S_MOV_B64 -1

  bb.1:
    liveins: $vcc
    %0:sreg_32_xm0 = S_MOV_B32 12345
    %1:vgpr_32 = IMPLICIT_DEF
    %2:vgpr_32, %3:sreg_64 = V_ADD_I32_e64 %0, %1, 0, implicit $exec
    S_ENDPGM 0, implicit %2, implicit $vcc_lo

...
---

name: shrink_scalar_imm_vgpr_v_add_i32_e64_livein_vcc_hi
tracksRegLiveness: true

body:             |
  ; GCN-LABEL: name: shrink_scalar_imm_vgpr_v_add_i32_e64_livein_vcc_hi
  ; GCN: bb.0:
  ; GCN:   successors: %bb.1(0x80000000)
  ; GCN:   $vcc_hi = S_MOV_B32 -1
  ; GCN: bb.1:
  ; GCN:   successors: %bb.2(0x80000000)
  ; GCN:   liveins: $vcc_hi
  ; GCN:   [[S_MOV_B32_:%[0-9]+]]:sreg_32_xm0 = S_MOV_B32 12345
  ; GCN:   [[DEF:%[0-9]+]]:vgpr_32 = IMPLICIT_DEF
  ; GCN:   [[V_ADD_I32_e64_:%[0-9]+]]:vgpr_32, [[V_ADD_I32_e64_1:%[0-9]+]]:sreg_64 = V_ADD_I32_e64 [[S_MOV_B32_]], [[DEF]], 0, implicit $exec
  ; GCN: bb.2:
  ; GCN:   liveins: $vcc_hi
  ; GCN:   S_ENDPGM 0, implicit [[V_ADD_I32_e64_]], implicit $vcc_hi
  bb.0:
    successors: %bb.1
    $vcc_hi = S_MOV_B32 -1

  bb.1:
    liveins: $vcc_hi
    %0:sreg_32_xm0 = S_MOV_B32 12345
    %1:vgpr_32 = IMPLICIT_DEF
    %2:vgpr_32, %3:sreg_64 = V_ADD_I32_e64 %0, %1, 0, implicit $exec

  bb.2:
    liveins: $vcc_hi

    S_ENDPGM 0, implicit %2, implicit $vcc_hi

...

---

name: shrink_scalar_imm_vgpr_v_sub_i32_e64_no_carry_out_use
tracksRegLiveness: true

body:             |
  bb.0:
    ; GCN-LABEL: name: shrink_scalar_imm_vgpr_v_sub_i32_e64_no_carry_out_use
    ; GCN: [[S_MOV_B32_:%[0-9]+]]:sreg_32_xm0 = S_MOV_B32 12345
    ; GCN: [[DEF:%[0-9]+]]:vgpr_32 = IMPLICIT_DEF
    ; GCN: [[V_SUB_I32_e32_:%[0-9]+]]:vgpr_32 = V_SUB_I32_e32 [[S_MOV_B32_]], [[DEF]], implicit-def $vcc, implicit $exec
    ; GCN: S_ENDPGM 0, implicit [[V_SUB_I32_e32_]]
    %0:sreg_32_xm0 = S_MOV_B32 12345
    %1:vgpr_32 = IMPLICIT_DEF
    %2:vgpr_32, %3:sreg_64 = V_SUB_I32_e64 %0, %1, 0, implicit $exec
    S_ENDPGM 0, implicit %2

...

---

name: shrink_vgpr_scalar_imm_v_sub_i32_e64_no_carry_out_use
tracksRegLiveness: true

body:             |
  bb.0:
    ; GCN-LABEL: name: shrink_vgpr_scalar_imm_v_sub_i32_e64_no_carry_out_use
    ; GCN: [[DEF:%[0-9]+]]:vgpr_32 = IMPLICIT_DEF
    ; GCN: [[S_MOV_B32_:%[0-9]+]]:sreg_32_xm0 = S_MOV_B32 12345
    ; GCN: [[V_SUBREV_I32_e32_:%[0-9]+]]:vgpr_32 = V_SUBREV_I32_e32 [[S_MOV_B32_]], [[DEF]], implicit-def $vcc, implicit $exec
    ; GCN: S_ENDPGM 0, implicit [[V_SUBREV_I32_e32_]]
    %0:vgpr_32 = IMPLICIT_DEF
    %1:sreg_32_xm0 = S_MOV_B32 12345
    %2:vgpr_32, %3:sreg_64 = V_SUB_I32_e64 %0, %1, 0, implicit $exec
    S_ENDPGM 0, implicit %2

...

---

name: shrink_scalar_imm_vgpr_v_subrev_i32_e64_no_carry_out_use
tracksRegLiveness: true

body:             |
  bb.0:
    ; GCN-LABEL: name: shrink_scalar_imm_vgpr_v_subrev_i32_e64_no_carry_out_use
    ; GCN: [[S_MOV_B32_:%[0-9]+]]:sreg_32_xm0 = S_MOV_B32 12345
    ; GCN: [[DEF:%[0-9]+]]:vgpr_32 = IMPLICIT_DEF
    ; GCN: [[V_SUBREV_I32_e32_:%[0-9]+]]:vgpr_32 = V_SUBREV_I32_e32 [[S_MOV_B32_]], [[DEF]], implicit-def $vcc, implicit $exec
    ; GCN: S_ENDPGM 0, implicit [[V_SUBREV_I32_e32_]]
    %0:sreg_32_xm0 = S_MOV_B32 12345
    %1:vgpr_32 = IMPLICIT_DEF
    %2:vgpr_32, %3:sreg_64 = V_SUBREV_I32_e64 %0, %1, 0, implicit $exec
    S_ENDPGM 0, implicit %2

...

---

name: shrink_vgpr_scalar_imm_v_subrev_i32_e64_no_carry_out_use
tracksRegLiveness: true

body:             |
  bb.0:
    ; GCN-LABEL: name: shrink_vgpr_scalar_imm_v_subrev_i32_e64_no_carry_out_use
    ; GCN: [[DEF:%[0-9]+]]:vgpr_32 = IMPLICIT_DEF
    ; GCN: [[S_MOV_B32_:%[0-9]+]]:sreg_32_xm0 = S_MOV_B32 12345
    ; GCN: [[V_SUB_I32_e32_:%[0-9]+]]:vgpr_32 = V_SUB_I32_e32 [[S_MOV_B32_]], [[DEF]], implicit-def $vcc, implicit $exec
    ; GCN: S_ENDPGM 0, implicit [[V_SUB_I32_e32_]]
    %0:vgpr_32 = IMPLICIT_DEF
    %1:sreg_32_xm0 = S_MOV_B32 12345
    %2:vgpr_32, %3:sreg_64 = V_SUBREV_I32_e64 %0, %1, 0, implicit $exec
    S_ENDPGM 0, implicit %2

...

---

# We know this is OK because vcc isn't live out of the block.

name: shrink_scalar_imm_vgpr_v_add_i32_e64_known_no_liveout
tracksRegLiveness: true

body:             |
  ; GCN-LABEL: name: shrink_scalar_imm_vgpr_v_add_i32_e64_known_no_liveout
  ; GCN: bb.0:
  ; GCN:   successors: %bb.1(0x80000000)
  ; GCN:   [[S_MOV_B32_:%[0-9]+]]:sreg_32_xm0 = S_MOV_B32 12345
  ; GCN:   [[DEF:%[0-9]+]]:vgpr_32 = IMPLICIT_DEF
  ; GCN:   [[V_ADD_I32_e32_:%[0-9]+]]:vgpr_32 = V_ADD_I32_e32 [[S_MOV_B32_]], [[DEF]], implicit-def $vcc, implicit $exec
  ; GCN: bb.1:
  ; GCN:   S_ENDPGM 0, implicit [[V_ADD_I32_e32_]]
  bb.0:
    successors: %bb.1

    S_NOP 0
    S_NOP 0
    S_NOP 0
    S_NOP 0
    S_NOP 0
    S_NOP 0
    S_NOP 0
    S_NOP 0
    S_NOP 0
    S_NOP 0
    S_NOP 0
    S_NOP 0
    S_NOP 0
    S_NOP 0
    S_NOP 0
    S_NOP 0
    S_NOP 0
    S_NOP 0
    S_NOP 0
    S_NOP 0
    S_NOP 0
    S_NOP 0
    S_NOP 0
    S_NOP 0
    S_NOP 0
    S_NOP 0
    S_NOP 0
    S_NOP 0
    S_NOP 0
    S_NOP 0
    %0:sreg_32_xm0 = S_MOV_B32 12345
    %1:vgpr_32 = IMPLICIT_DEF
    %2:vgpr_32, %3:sreg_64 = V_ADD_I32_e64 %0, %1, 0, implicit $exec
    S_NOP 0
    S_NOP 0

  bb.1:
    S_ENDPGM 0, implicit %2

...

---

# We know this is OK because vcc isn't live out of the block, even
# though it had a defined but unused. value

name: shrink_scalar_imm_vgpr_v_add_i32_e64_known_no_liveout_dead_vcc_def
tracksRegLiveness: true

body:             |
  ; GCN-LABEL: name: shrink_scalar_imm_vgpr_v_add_i32_e64_known_no_liveout_dead_vcc_def
  ; GCN: bb.0:
  ; GCN:   successors: %bb.1(0x80000000)
  ; GCN:   [[S_MOV_B32_:%[0-9]+]]:sreg_32_xm0 = S_MOV_B32 12345
  ; GCN:   [[DEF:%[0-9]+]]:vgpr_32 = IMPLICIT_DEF
  ; GCN:   [[V_ADD_I32_e32_:%[0-9]+]]:vgpr_32 = V_ADD_I32_e32 [[S_MOV_B32_]], [[DEF]], implicit-def $vcc, implicit $exec
  ; GCN: bb.1:
  ; GCN:   S_ENDPGM 0, implicit [[V_ADD_I32_e32_]]
  bb.0:
    successors: %bb.1

    S_NOP 0, implicit-def $vcc
    %0:sreg_32_xm0 = S_MOV_B32 12345
    %1:vgpr_32 = IMPLICIT_DEF
    %2:vgpr_32, %3:sreg_64 = V_ADD_I32_e64 %0, %1, 0, implicit $exec
    S_NOP 0
    S_NOP 0

  bb.1:
    S_ENDPGM 0, implicit %2

...
---

# This requires searching through many DBG_VALUE instructions before the insert poitn, which
# should not count against the search limit.

name: vcc_liveness_dbg_value_search_before
tracksRegLiveness: true

body:             |
  bb.0:
    ; GCN-LABEL: name: vcc_liveness_dbg_value_search_before
    ; GCN: [[S_MOV_B32_:%[0-9]+]]:sreg_32_xm0 = S_MOV_B32 12345
    ; GCN: [[DEF:%[0-9]+]]:vgpr_32 = IMPLICIT_DEF
    ; GCN: DBG_VALUE $noreg, 0
    ; GCN: DBG_VALUE $noreg, 0
    ; GCN: DBG_VALUE $noreg, 0
    ; GCN: DBG_VALUE $noreg, 0
    ; GCN: DBG_VALUE $noreg, 0
    ; GCN: DBG_VALUE $noreg, 0
    ; GCN: DBG_VALUE $noreg, 0
    ; GCN: DBG_VALUE $noreg, 0
    ; GCN: DBG_VALUE $noreg, 0
    ; GCN: DBG_VALUE $noreg, 0
    ; GCN: DBG_VALUE $noreg, 0
    ; GCN: DBG_VALUE $noreg, 0
    ; GCN: DBG_VALUE $noreg, 0
    ; GCN: DBG_VALUE $noreg, 0
    ; GCN: DBG_VALUE $noreg, 0
    ; GCN: DBG_VALUE $noreg, 0
    ; GCN: DBG_VALUE $noreg, 0
    ; GCN: DBG_VALUE $noreg, 0
    ; GCN: DBG_VALUE $noreg, 0
    ; GCN: DBG_VALUE $noreg, 0
    ; GCN: DBG_VALUE $noreg, 0
    ; GCN: DBG_VALUE $noreg, 0
    ; GCN: DBG_VALUE $noreg, 0
    ; GCN: DBG_VALUE $noreg, 0
    ; GCN: DBG_VALUE $noreg, 0
    ; GCN: DBG_VALUE $noreg, 0
    ; GCN: DBG_VALUE $noreg, 0
    ; GCN: DBG_VALUE $noreg, 0
    ; GCN: [[V_ADD_I32_e32_:%[0-9]+]]:vgpr_32 = V_ADD_I32_e32 [[S_MOV_B32_]], [[DEF]], implicit-def $vcc, implicit $exec
    ; GCN: S_ENDPGM 0, implicit [[V_ADD_I32_e32_]]
    %0:sreg_32_xm0 = S_MOV_B32 12345
    %1:vgpr_32 = IMPLICIT_DEF
    DBG_VALUE $noreg, 0
    DBG_VALUE $noreg, 0
    DBG_VALUE $noreg, 0
    DBG_VALUE $noreg, 0
    DBG_VALUE $noreg, 0
    DBG_VALUE $noreg, 0
    DBG_VALUE $noreg, 0
    DBG_VALUE $noreg, 0
    DBG_VALUE $noreg, 0
    DBG_VALUE $noreg, 0
    DBG_VALUE $noreg, 0
    DBG_VALUE $noreg, 0
    DBG_VALUE $noreg, 0
    DBG_VALUE $noreg, 0
    DBG_VALUE $noreg, 0
    DBG_VALUE $noreg, 0
    DBG_VALUE $noreg, 0
    DBG_VALUE $noreg, 0
    DBG_VALUE $noreg, 0
    DBG_VALUE $noreg, 0
    DBG_VALUE $noreg, 0
    DBG_VALUE $noreg, 0
    DBG_VALUE $noreg, 0
    DBG_VALUE $noreg, 0
    DBG_VALUE $noreg, 0
    DBG_VALUE $noreg, 0
    DBG_VALUE $noreg, 0
    DBG_VALUE $noreg, 0
    %2:vgpr_32, %3:sreg_64 = V_ADD_I32_e64 %0, %1, 0, implicit $exec
    S_ENDPGM 0, implicit %2

...
---

# This requires searching through many DBG_VALUE instructions after the insert point, which
# should not count against the search limit.

name: vcc_liveness_dbg_value_search_after
tracksRegLiveness: true

body:             |
  bb.0:
    ; GCN-LABEL: name: vcc_liveness_dbg_value_search_after
    ; GCN: [[S_MOV_B32_:%[0-9]+]]:sreg_32_xm0 = S_MOV_B32 12345
    ; GCN: [[DEF:%[0-9]+]]:vgpr_32 = IMPLICIT_DEF
    ; GCN: [[V_ADD_I32_e32_:%[0-9]+]]:vgpr_32 = V_ADD_I32_e32 [[S_MOV_B32_]], [[DEF]], implicit-def $vcc, implicit $exec
    ; GCN: DBG_VALUE $noreg, 0
    ; GCN: DBG_VALUE $noreg, 0
    ; GCN: DBG_VALUE $noreg, 0
    ; GCN: DBG_VALUE $noreg, 0
    ; GCN: DBG_VALUE $noreg, 0
    ; GCN: DBG_VALUE $noreg, 0
    ; GCN: DBG_VALUE $noreg, 0
    ; GCN: DBG_VALUE $noreg, 0
    ; GCN: DBG_VALUE $noreg, 0
    ; GCN: DBG_VALUE $noreg, 0
    ; GCN: DBG_VALUE $noreg, 0
    ; GCN: DBG_VALUE $noreg, 0
    ; GCN: DBG_VALUE $noreg, 0
    ; GCN: DBG_VALUE $noreg, 0
    ; GCN: DBG_VALUE $noreg, 0
    ; GCN: DBG_VALUE $noreg, 0
    ; GCN: DBG_VALUE $noreg, 0
    ; GCN: DBG_VALUE $noreg, 0
    ; GCN: DBG_VALUE $noreg, 0
    ; GCN: DBG_VALUE $noreg, 0
    ; GCN: DBG_VALUE $noreg, 0
    ; GCN: DBG_VALUE $noreg, 0
    ; GCN: DBG_VALUE $noreg, 0
    ; GCN: DBG_VALUE $noreg, 0
    ; GCN: DBG_VALUE $noreg, 0
    ; GCN: DBG_VALUE $noreg, 0
    ; GCN: DBG_VALUE $noreg, 0
    ; GCN: DBG_VALUE $noreg, 0
    ; GCN: S_ENDPGM 0, implicit [[V_ADD_I32_e32_]]
    %0:sreg_32_xm0 = S_MOV_B32 12345
    %1:vgpr_32 = IMPLICIT_DEF
    S_NOP 0
    S_NOP 0
    S_NOP 0
    S_NOP 0
    S_NOP 0
    S_NOP 0
    S_NOP 0
    S_NOP 0
    S_NOP 0
    S_NOP 0
    S_NOP 0
    S_NOP 0
    S_NOP 0
    S_NOP 0
    S_NOP 0
    S_NOP 0
    S_NOP 0
    S_NOP 0
    S_NOP 0
    S_NOP 0
    S_NOP 0
    S_NOP 0
    S_NOP 0
    S_NOP 0
    S_NOP 0
    S_NOP 0
    S_NOP 0
    S_NOP 0
    %2:vgpr_32, %3:sreg_64 = V_ADD_I32_e64 %0, %1, 0, implicit $exec
    DBG_VALUE $noreg, 0
    DBG_VALUE $noreg, 0
    DBG_VALUE $noreg, 0
    DBG_VALUE $noreg, 0
    DBG_VALUE $noreg, 0
    DBG_VALUE $noreg, 0
    DBG_VALUE $noreg, 0
    DBG_VALUE $noreg, 0
    DBG_VALUE $noreg, 0
    DBG_VALUE $noreg, 0
    DBG_VALUE $noreg, 0
    DBG_VALUE $noreg, 0
    DBG_VALUE $noreg, 0
    DBG_VALUE $noreg, 0
    DBG_VALUE $noreg, 0
    DBG_VALUE $noreg, 0
    DBG_VALUE $noreg, 0
    DBG_VALUE $noreg, 0
    DBG_VALUE $noreg, 0
    DBG_VALUE $noreg, 0
    DBG_VALUE $noreg, 0
    DBG_VALUE $noreg, 0
    DBG_VALUE $noreg, 0
    DBG_VALUE $noreg, 0
    DBG_VALUE $noreg, 0
    DBG_VALUE $noreg, 0
    DBG_VALUE $noreg, 0
    DBG_VALUE $noreg, 0
    $vcc = S_MOV_B64 0
    S_ENDPGM 0, implicit %2

...