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

---

# Uses a carry out in an instruction that can't be shrunk.

name: shrink_scalar_imm_vgpr_v_add_i32_e64_other_carry_out_use
tracksRegLiveness: true

body:             |
  bb.0:
    ; GCN-LABEL: name: shrink_scalar_imm_vgpr_v_add_i32_e64_other_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: [[COPY:%[0-9]+]]:sreg_64_xexec = COPY killed $vcc
    ; GCN: S_ENDPGM 0, implicit [[COPY]]
    %0:sreg_32_xm0 = S_MOV_B32 12345
    %1:vgpr_32 = IMPLICIT_DEF
    %2:vgpr_32 = IMPLICIT_DEF
    %3:vgpr_32 = IMPLICIT_DEF

    %4:vgpr_32, %5:sreg_64_xexec = V_ADD_I32_e64 %0, %1, 0, implicit $exec
    S_ENDPGM 0, implicit %5

...
---

name: shrink_scalar_imm_multi_use_with_used_carry
tracksRegLiveness: true

body:             |
  bb.0:
    ; GCN-LABEL: name: shrink_scalar_imm_multi_use_with_used_carry
    ; GCN: [[S_MOV_B32_:%[0-9]+]]:sreg_32_xm0 = S_MOV_B32 12345
    ; GCN: [[DEF:%[0-9]+]]:vgpr_32 = IMPLICIT_DEF
    ; GCN: [[DEF1:%[0-9]+]]:vgpr_32 = IMPLICIT_DEF
    ; GCN: [[V_ADD_I32_e64_:%[0-9]+]]:vgpr_32, [[V_ADD_I32_e64_1:%[0-9]+]]:sreg_64_xexec = V_ADD_I32_e64 [[S_MOV_B32_]], [[DEF]], 0, implicit $exec
    ; GCN: [[V_ADD_I32_e64_2:%[0-9]+]]:vgpr_32, [[V_ADD_I32_e64_3:%[0-9]+]]:sreg_64_xexec = V_ADD_I32_e64 [[S_MOV_B32_]], [[DEF1]], 0, implicit $exec
    ; GCN: S_ENDPGM 0, implicit [[V_ADD_I32_e64_1]], implicit [[V_ADD_I32_e64_2]]
    %0:sreg_32_xm0 = S_MOV_B32 12345
    %1:vgpr_32 = IMPLICIT_DEF
    %2:vgpr_32 = IMPLICIT_DEF
    %3:vgpr_32 = IMPLICIT_DEF
    %4:vgpr_32 = IMPLICIT_DEF

    %5:vgpr_32, %6:sreg_64_xexec = V_ADD_I32_e64 %0, %1, 0, implicit $exec
    %7:vgpr_32, %8:sreg_64_xexec = V_ADD_I32_e64 %0, %2, 0, implicit $exec
    S_ENDPGM 0, implicit %6, implicit %7

...
---

# TODO: Is it OK to leave the broken use around on the DBG_VALUE?

name: shrink_scalar_imm_vgpr_v_add_i32_e64_dbg_only_carry_out_use
tracksRegLiveness: true

body:             |
  bb.0:
    ; GCN-LABEL: name: shrink_scalar_imm_vgpr_v_add_i32_e64_dbg_only_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: DBG_VALUE %5:sreg_64_xexec, $noreg
    ; 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 = IMPLICIT_DEF
    %3:vgpr_32 = IMPLICIT_DEF

    %4:vgpr_32, %5:sreg_64_xexec = V_ADD_I32_e64 %0, %1, 0, implicit $exec
    DBG_VALUE %5, $noreg
    S_ENDPGM 0, implicit %4

...

---

# Uses carry out in a normal pattern

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: [[DEF1:%[0-9]+]]:vgpr_32 = IMPLICIT_DEF
    ; GCN: [[DEF2:%[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: [[COPY:%[0-9]+]]:sreg_64_xexec = COPY killed $vcc
    ; GCN: [[V_ADDC_U32_e64_:%[0-9]+]]:vgpr_32, [[V_ADDC_U32_e64_1:%[0-9]+]]:sreg_64_xexec = V_ADDC_U32_e64 [[DEF1]], [[DEF2]], [[COPY]], 0, implicit $exec
    ; GCN: S_ENDPGM 0, implicit [[V_ADDC_U32_e64_]]
    %0:sreg_32_xm0 = S_MOV_B32 12345
    %1:vgpr_32 = IMPLICIT_DEF
    %2:vgpr_32 = IMPLICIT_DEF
    %3:vgpr_32 = IMPLICIT_DEF

    %4:vgpr_32, %5:sreg_64_xexec = V_ADD_I32_e64 %0, %1, 0, implicit $exec
    %6:vgpr_32, %7:sreg_64_xexec = V_ADDC_U32_e64 %2, %3, %5, 0, implicit $exec
    S_ENDPGM 0, implicit %6

...