llvm/test/CodeGen/AArch64/machine-sme-abi-find-insert-pt.mir

# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py UTC_ARGS: --version 6
# RUN: llc -mtriple=aarch64 -mattr=+sve -mattr=+sme -run-pass=aarch64-machine-sme-abi -verify-machineinstrs %s -o - | FileCheck %s

--- |
  ; Test moving a state change to be before a $nzcv def
  define void @move_before_nzcv_def() "aarch64_inout_za" { ret void }

  ; Test moving a state change to a point where $x0 is live
  define void @move_to_x0_live() "aarch64_inout_za" { ret void }

  ; Test we don't move before a previous state change.
  define void @do_not_move_before_prior_state_change() "aarch64_za_state_agnostic" { ret void }

  ; Test we don't move into a call sequence.
  define void @do_not_move_into_call() "aarch64_inout_za" { ret void }

  declare void @clobber()
  declare void @inout_call() "aarch64_inout_za"
...
---
name:            move_before_nzcv_def
tracksRegLiveness: true
isSSA:             true
noVRegs:           false
body:             |
  bb.0:

    ; CHECK-LABEL: name: move_before_nzcv_def
    ; CHECK: [[RDSVLI_XI:%[0-9]+]]:gpr64 = RDSVLI_XI 1, implicit $vg
    ; CHECK-NEXT: [[COPY:%[0-9]+]]:gpr64 = COPY $sp
    ; CHECK-NEXT: [[MSUBXrrr:%[0-9]+]]:gpr64 = MSUBXrrr [[RDSVLI_XI]], [[RDSVLI_XI]], [[COPY]]
    ; CHECK-NEXT: $sp = COPY [[MSUBXrrr]]
    ; CHECK-NEXT: STPXi [[MSUBXrrr]], [[RDSVLI_XI]], %stack.0, 0
    ; CHECK-NEXT: [[ADDXri:%[0-9]+]]:gpr64sp = ADDXri %stack.0, 0, 0
    ; CHECK-NEXT: [[COPY1:%[0-9]+]]:gpr64 = COPY [[ADDXri]]
    ; CHECK-NEXT: MSR 56965, [[COPY1]]
    ; CHECK-NEXT: ADJCALLSTACKDOWN 0, 0, implicit-def dead $sp, implicit $sp
    ; CHECK-NEXT: RequiresZASavePseudo
    ; CHECK-NEXT: BL @clobber, csr_aarch64_aapcs, implicit-def dead $lr, implicit $sp, implicit-def $sp
    ; CHECK-NEXT: ADJCALLSTACKUP 0, 0, implicit-def dead $sp, implicit $sp
    ; CHECK-NEXT: MSRpstatesvcrImm1 2, 1, implicit-def $nzcv
    ; CHECK-NEXT: [[MRS:%[0-9]+]]:gpr64 = MRS 56965, implicit-def $nzcv
    ; CHECK-NEXT: $x0 = ADDXri %stack.0, 0, 0
    ; CHECK-NEXT: RestoreZAPseudo [[MRS]], $x0, &__arm_tpidr2_restore, csr_aarch64_sme_abi_support_routines_preservemost_from_x0
    ; CHECK-NEXT: MSR 56965, $xzr
    ; CHECK-NEXT: $nzcv = IMPLICIT_DEF
    ; CHECK-NEXT: $zab0 = IMPLICIT_DEF
    ; CHECK-NEXT: FAKE_USE $nzcv
    ; CHECK-NEXT: RET_ReallyLR
    ADJCALLSTACKDOWN 0, 0, implicit-def dead $sp, implicit $sp
    RequiresZASavePseudo
    BL @clobber, csr_aarch64_aapcs, implicit-def dead $lr, implicit $sp, implicit-def $sp
    ADJCALLSTACKUP 0, 0, implicit-def dead $sp, implicit $sp

    $nzcv = IMPLICIT_DEF
    $zab0 = IMPLICIT_DEF
    FAKE_USE $nzcv

    RET_ReallyLR
...
---
name:            move_to_x0_live
tracksRegLiveness: true
isSSA:             true
noVRegs:           false
body:             |
  bb.0:

    ; CHECK-LABEL: name: move_to_x0_live
    ; CHECK: [[RDSVLI_XI:%[0-9]+]]:gpr64 = RDSVLI_XI 1, implicit $vg
    ; CHECK-NEXT: [[COPY:%[0-9]+]]:gpr64 = COPY $sp
    ; CHECK-NEXT: [[MSUBXrrr:%[0-9]+]]:gpr64 = MSUBXrrr [[RDSVLI_XI]], [[RDSVLI_XI]], [[COPY]]
    ; CHECK-NEXT: $sp = COPY [[MSUBXrrr]]
    ; CHECK-NEXT: STPXi [[MSUBXrrr]], [[RDSVLI_XI]], %stack.0, 0
    ; CHECK-NEXT: [[ADDXri:%[0-9]+]]:gpr64sp = ADDXri %stack.0, 0, 0
    ; CHECK-NEXT: [[COPY1:%[0-9]+]]:gpr64 = COPY [[ADDXri]]
    ; CHECK-NEXT: MSR 56965, [[COPY1]]
    ; CHECK-NEXT: ADJCALLSTACKDOWN 0, 0, implicit-def dead $sp, implicit $sp
    ; CHECK-NEXT: RequiresZASavePseudo
    ; CHECK-NEXT: BL @clobber, csr_aarch64_aapcs, implicit-def dead $lr, implicit $sp, implicit-def $sp
    ; CHECK-NEXT: ADJCALLSTACKUP 0, 0, implicit-def dead $sp, implicit $sp
    ; CHECK-NEXT: MSRpstatesvcrImm1 2, 1, implicit-def $nzcv
    ; CHECK-NEXT: [[MRS:%[0-9]+]]:gpr64 = MRS 56965, implicit-def $nzcv
    ; CHECK-NEXT: $x0 = ADDXri %stack.0, 0, 0
    ; CHECK-NEXT: RestoreZAPseudo [[MRS]], $x0, &__arm_tpidr2_restore, csr_aarch64_sme_abi_support_routines_preservemost_from_x0
    ; CHECK-NEXT: MSR 56965, $xzr
    ; CHECK-NEXT: $x0 = IMPLICIT_DEF
    ; CHECK-NEXT: $nzcv = IMPLICIT_DEF
    ; CHECK-NEXT: FAKE_USE $x0
    ; CHECK-NEXT: $zab0 = IMPLICIT_DEF
    ; CHECK-NEXT: FAKE_USE $nzcv
    ; CHECK-NEXT: RET_ReallyLR
    ADJCALLSTACKDOWN 0, 0, implicit-def dead $sp, implicit $sp
    RequiresZASavePseudo
    BL @clobber, csr_aarch64_aapcs, implicit-def dead $lr, implicit $sp, implicit-def $sp
    ADJCALLSTACKUP 0, 0, implicit-def dead $sp, implicit $sp

    $x0 = IMPLICIT_DEF

    $nzcv = IMPLICIT_DEF
    FAKE_USE $x0

    $zab0 = IMPLICIT_DEF
    FAKE_USE $nzcv

    RET_ReallyLR
...
---
name:            do_not_move_before_prior_state_change
tracksRegLiveness: true
isSSA:             true
noVRegs:           false
body:             |
  ; CHECK-LABEL: name: do_not_move_before_prior_state_change
  ; CHECK: bb.0:
  ; CHECK-NEXT:   successors: %bb.1(0x40000000), %bb.2(0x40000000)
  ; CHECK-NEXT: {{  $}}
  ; CHECK-NEXT:   BL &__arm_sme_state_size, csr_aarch64_sme_abi_support_routines_preservemost_from_x1, implicit-def $lr, implicit $sp, implicit-def $x0
  ; CHECK-NEXT:   [[COPY:%[0-9]+]]:gpr64 = COPY $x0
  ; CHECK-NEXT:   $sp = SUBXrx64 $sp, [[COPY]], 24
  ; CHECK-NEXT:   [[COPY1:%[0-9]+]]:gpr64 = COPY $sp
  ; CHECK-NEXT:   $nzcv = IMPLICIT_DEF
  ; CHECK-NEXT:   $zab0 = IMPLICIT_DEF
  ; CHECK-NEXT:   [[MRS:%[0-9]+]]:gpr64 = MRS 55824, implicit-def $nzcv, implicit $nzcv
  ; CHECK-NEXT:   $x0 = COPY [[COPY1]]
  ; CHECK-NEXT:   BL &__arm_sme_save, csr_aarch64_sme_abi_support_routines_preservemost_from_x1, implicit-def $lr, implicit $sp, implicit $x0
  ; CHECK-NEXT:   MSR 55824, [[MRS]], implicit-def $nzcv
  ; CHECK-NEXT:   Bcc 2, %bb.1, implicit $nzcv
  ; CHECK-NEXT:   B %bb.2
  ; CHECK-NEXT: {{  $}}
  ; CHECK-NEXT: bb.1:
  ; CHECK-NEXT:   liveins: $nzcv
  ; CHECK-NEXT: {{  $}}
  ; CHECK-NEXT:   FAKE_USE $nzcv
  ; CHECK-NEXT:   ADJCALLSTACKDOWN 0, 0, implicit-def dead $sp, implicit $sp
  ; CHECK-NEXT:   RequiresZASavePseudo
  ; CHECK-NEXT:   BL @clobber, csr_aarch64_aapcs, implicit-def dead $lr, implicit $sp, implicit-def $sp
  ; CHECK-NEXT:   ADJCALLSTACKUP 0, 0, implicit-def dead $sp, implicit $sp
  ; CHECK-NEXT:   $x0 = COPY [[COPY1]]
  ; CHECK-NEXT:   BL &__arm_sme_restore, csr_aarch64_sme_abi_support_routines_preservemost_from_x1, implicit-def $lr, implicit $sp, implicit $x0
  ; CHECK-NEXT:   RET_ReallyLR
  ; CHECK-NEXT: {{  $}}
  ; CHECK-NEXT: bb.2:
  ; CHECK-NEXT:   ADJCALLSTACKDOWN 0, 0, implicit-def dead $sp, implicit $sp
  ; CHECK-NEXT:   RequiresZASavePseudo
  ; CHECK-NEXT:   BL @clobber, csr_aarch64_aapcs, implicit-def dead $lr, implicit $sp, implicit-def $sp
  ; CHECK-NEXT:   ADJCALLSTACKUP 0, 0, implicit-def dead $sp, implicit $sp
  ; CHECK-NEXT:   $x0 = COPY [[COPY1]]
  ; CHECK-NEXT:   BL &__arm_sme_restore, csr_aarch64_sme_abi_support_routines_preservemost_from_x1, implicit-def $lr, implicit $sp, implicit $x0
  ; CHECK-NEXT:   RET_ReallyLR
  bb.0:
    successors: %bb.1, %bb.2

    ; The insertion point can move before the $nzcv def (as that would require
    ; moving before a $zab0 def -- that requires the ACTIVE state).
    $nzcv = IMPLICIT_DEF
    $zab0 = IMPLICIT_DEF
    Bcc 2, %bb.1, implicit $nzcv
    B %bb.2
  ; bb.1 and bb.2 both require ZA saved on entry (to force bb.0's exit bundle to
  ; pick the LOCAL_SAVED state).
  bb.1:
    liveins: $nzcv
    FAKE_USE $nzcv

    ADJCALLSTACKDOWN 0, 0, implicit-def dead $sp, implicit $sp
    RequiresZASavePseudo
    BL @clobber, csr_aarch64_aapcs, implicit-def dead $lr, implicit $sp, implicit-def $sp
    ADJCALLSTACKUP 0, 0, implicit-def dead $sp, implicit $sp

    RET_ReallyLR
  bb.2:
    ADJCALLSTACKDOWN 0, 0, implicit-def dead $sp, implicit $sp
    RequiresZASavePseudo
    BL @clobber, csr_aarch64_aapcs, implicit-def dead $lr, implicit $sp, implicit-def $sp
    ADJCALLSTACKUP 0, 0, implicit-def dead $sp, implicit $sp

    RET_ReallyLR
...
---
name:            do_not_move_into_call
tracksRegLiveness: true
isSSA:             true
noVRegs:           false
body:             |
  bb.0:

    ; CHECK-LABEL: name: do_not_move_into_call
    ; CHECK: [[RDSVLI_XI:%[0-9]+]]:gpr64 = RDSVLI_XI 1, implicit $vg
    ; CHECK-NEXT: [[COPY:%[0-9]+]]:gpr64 = COPY $sp
    ; CHECK-NEXT: [[MSUBXrrr:%[0-9]+]]:gpr64 = MSUBXrrr [[RDSVLI_XI]], [[RDSVLI_XI]], [[COPY]]
    ; CHECK-NEXT: $sp = COPY [[MSUBXrrr]]
    ; CHECK-NEXT: STPXi [[MSUBXrrr]], [[RDSVLI_XI]], %stack.0, 0
    ; CHECK-NEXT: [[ADDXri:%[0-9]+]]:gpr64sp = ADDXri %stack.0, 0, 0
    ; CHECK-NEXT: [[COPY1:%[0-9]+]]:gpr64 = COPY [[ADDXri]]
    ; CHECK-NEXT: MSR 56965, [[COPY1]]
    ; CHECK-NEXT: ADJCALLSTACKDOWN 0, 0, implicit-def dead $sp, implicit $sp
    ; CHECK-NEXT: RequiresZASavePseudo
    ; CHECK-NEXT: BL @clobber, csr_aarch64_aapcs, implicit-def dead $lr, implicit $sp, implicit-def $sp
    ; CHECK-NEXT: $nzcv = IMPLICIT_DEF
    ; CHECK-NEXT: ADJCALLSTACKUP 0, 0, implicit-def dead $sp, implicit $sp
    ; CHECK-NEXT: [[MRS:%[0-9]+]]:gpr64 = MRS 55824, implicit-def $nzcv, implicit $nzcv
    ; CHECK-NEXT: MSRpstatesvcrImm1 2, 1, implicit-def $nzcv
    ; CHECK-NEXT: [[MRS1:%[0-9]+]]:gpr64 = MRS 56965, implicit-def $nzcv
    ; CHECK-NEXT: $x0 = ADDXri %stack.0, 0, 0
    ; CHECK-NEXT: RestoreZAPseudo [[MRS1]], $x0, &__arm_tpidr2_restore, csr_aarch64_sme_abi_support_routines_preservemost_from_x0
    ; CHECK-NEXT: MSR 56965, $xzr
    ; CHECK-NEXT: MSR 55824, [[MRS]], implicit-def $nzcv
    ; CHECK-NEXT: $zab0 = IMPLICIT_DEF
    ; CHECK-NEXT: FAKE_USE $nzcv
    ; CHECK-NEXT: RET_ReallyLR
    ADJCALLSTACKDOWN 0, 0, implicit-def dead $sp, implicit $sp
    RequiresZASavePseudo
    BL @clobber, csr_aarch64_aapcs, implicit-def dead $lr, implicit $sp, implicit-def $sp

    ; This is artificial test where NZCV is def'd inside a call, so we can't
    ; move the insert point before it's definition.
    $nzcv = IMPLICIT_DEF
    ADJCALLSTACKUP 0, 0, implicit-def dead $sp, implicit $sp

    $zab0 = IMPLICIT_DEF
    FAKE_USE $nzcv

    RET_ReallyLR
...