llvm/test/CodeGen/AArch64/sme-agnostic-za.ll

; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 5
; RUN: llc -mattr=+sme2 < %s | FileCheck %s

target triple = "aarch64"

declare i64 @private_za_decl(i64)
declare i64 @agnostic_decl(i64) "aarch64_za_state_agnostic"

; No calls. Test that no buffer is allocated.
define i64 @agnostic_caller_no_callees(ptr %ptr) nounwind "aarch64_za_state_agnostic" {
; CHECK-LABEL: agnostic_caller_no_callees:
; CHECK:       // %bb.0:
; CHECK-NEXT:    ldr x0, [x0]
; CHECK-NEXT:    ret
  %v = load i64, ptr %ptr
  ret i64 %v
}

; agnostic-ZA -> private-ZA
;
; Test that a buffer is allocated and that the appropriate save/restore calls are
; inserted for calls to non-agnostic functions and that the arg/result registers are
; preserved by the register allocator.
define i64 @agnostic_caller_private_za_callee(i64 %v) nounwind "aarch64_za_state_agnostic" {
; CHECK-LABEL: agnostic_caller_private_za_callee:
; CHECK:       // %bb.0:
; CHECK-NEXT:    stp x29, x30, [sp, #-32]! // 16-byte Folded Spill
; CHECK-NEXT:    str x19, [sp, #16] // 8-byte Folded Spill
; CHECK-NEXT:    mov x29, sp
; CHECK-NEXT:    mov x8, x0
; CHECK-NEXT:    bl __arm_sme_state_size
; CHECK-NEXT:    sub sp, sp, x0
; CHECK-NEXT:    mov x19, sp
; CHECK-NEXT:    mov x0, x19
; CHECK-NEXT:    bl __arm_sme_save
; CHECK-NEXT:    mov x0, x8
; CHECK-NEXT:    bl private_za_decl
; CHECK-NEXT:    mov x1, x0
; CHECK-NEXT:    mov x0, x19
; CHECK-NEXT:    bl __arm_sme_restore
; CHECK-NEXT:    mov x0, x19
; CHECK-NEXT:    bl __arm_sme_save
; CHECK-NEXT:    mov x0, x1
; CHECK-NEXT:    bl private_za_decl
; CHECK-NEXT:    mov x1, x0
; CHECK-NEXT:    mov x0, x19
; CHECK-NEXT:    bl __arm_sme_restore
; CHECK-NEXT:    mov x0, x1
; CHECK-NEXT:    mov sp, x29
; CHECK-NEXT:    ldr x19, [sp, #16] // 8-byte Folded Reload
; CHECK-NEXT:    ldp x29, x30, [sp], #32 // 16-byte Folded Reload
; CHECK-NEXT:    ret
  %res = call i64 @private_za_decl(i64 %v)
  %res2 = call i64 @private_za_decl(i64 %res)
  ret i64 %res2
}

; agnostic-ZA -> agnostic-ZA
;
; Should not result in save/restore code.
define i64 @agnostic_caller_agnostic_callee(i64 %v) nounwind "aarch64_za_state_agnostic" {
; CHECK-LABEL: agnostic_caller_agnostic_callee:
; CHECK:       // %bb.0:
; CHECK-NEXT:    str x30, [sp, #-16]! // 8-byte Folded Spill
; CHECK-NEXT:    bl agnostic_decl
; CHECK-NEXT:    ldr x30, [sp], #16 // 8-byte Folded Reload
; CHECK-NEXT:    ret
  %res = call i64 @agnostic_decl(i64 %v)
  ret i64 %res
}

; shared-ZA -> agnostic-ZA
;
; Should not result in lazy-save or save of ZT0
define i64 @shared_caller_agnostic_callee(i64 %v) nounwind "aarch64_inout_za" "aarch64_inout_zt0" {
; CHECK-LABEL: shared_caller_agnostic_callee:
; CHECK:       // %bb.0:
; CHECK-NEXT:    str x30, [sp, #-16]! // 8-byte Folded Spill
; CHECK-NEXT:    bl agnostic_decl
; CHECK-NEXT:    ldr x30, [sp], #16 // 8-byte Folded Reload
; CHECK-NEXT:    ret
  %res = call i64 @agnostic_decl(i64 %v)
  ret i64 %res
}

; agnostic-ZA + streaming -> private-ZA + non-streaming
define i64 @streaming_agnostic_caller_nonstreaming_private_za_callee(i64 %v) nounwind "aarch64_za_state_agnostic" "aarch64_pstate_sm_enabled" {
; CHECK-LABEL: streaming_agnostic_caller_nonstreaming_private_za_callee:
; CHECK:       // %bb.0:
; CHECK-NEXT:    stp d15, d14, [sp, #-112]! // 16-byte Folded Spill
; CHECK-NEXT:    stp d13, d12, [sp, #16] // 16-byte Folded Spill
; CHECK-NEXT:    mov x9, x0
; CHECK-NEXT:    stp d11, d10, [sp, #32] // 16-byte Folded Spill
; CHECK-NEXT:    stp d9, d8, [sp, #48] // 16-byte Folded Spill
; CHECK-NEXT:    stp x29, x30, [sp, #64] // 16-byte Folded Spill
; CHECK-NEXT:    bl __arm_get_current_vg
; CHECK-NEXT:    str x0, [sp, #80] // 8-byte Folded Spill
; CHECK-NEXT:    mov x0, x9
; CHECK-NEXT:    add x29, sp, #64
; CHECK-NEXT:    stp x20, x19, [sp, #96] // 16-byte Folded Spill
; CHECK-NEXT:    mov x8, x0
; CHECK-NEXT:    bl __arm_sme_state_size
; CHECK-NEXT:    sub sp, sp, x0
; CHECK-NEXT:    mov x20, sp
; CHECK-NEXT:    mov x0, x20
; CHECK-NEXT:    bl __arm_sme_save
; CHECK-NEXT:    smstop sm
; CHECK-NEXT:    mov x0, x8
; CHECK-NEXT:    bl private_za_decl
; CHECK-NEXT:    mov x1, x0
; CHECK-NEXT:    smstart sm
; CHECK-NEXT:    mov x0, x20
; CHECK-NEXT:    bl __arm_sme_restore
; CHECK-NEXT:    mov x0, x20
; CHECK-NEXT:    bl __arm_sme_save
; CHECK-NEXT:    smstop sm
; CHECK-NEXT:    mov x0, x1
; CHECK-NEXT:    bl private_za_decl
; CHECK-NEXT:    mov x1, x0
; CHECK-NEXT:    smstart sm
; CHECK-NEXT:    mov x0, x20
; CHECK-NEXT:    bl __arm_sme_restore
; CHECK-NEXT:    mov x0, x1
; CHECK-NEXT:    sub sp, x29, #64
; CHECK-NEXT:    ldp x20, x19, [sp, #96] // 16-byte Folded Reload
; CHECK-NEXT:    ldp x29, x30, [sp, #64] // 16-byte Folded Reload
; CHECK-NEXT:    ldp d9, d8, [sp, #48] // 16-byte Folded Reload
; CHECK-NEXT:    ldp d11, d10, [sp, #32] // 16-byte Folded Reload
; CHECK-NEXT:    ldp d13, d12, [sp, #16] // 16-byte Folded Reload
; CHECK-NEXT:    ldp d15, d14, [sp], #112 // 16-byte Folded Reload
; CHECK-NEXT:    ret
  %res = call i64 @private_za_decl(i64 %v)
  %res2 = call i64 @private_za_decl(i64 %res)
  ret i64 %res2
}

; agnostic-ZA + streaming-compatible -> private-ZA + non-streaming
define i64 @streaming_compatible_agnostic_caller_nonstreaming_private_za_callee(i64 %v) nounwind "aarch64_za_state_agnostic" "aarch64_pstate_sm_compatible" {
; CHECK-LABEL: streaming_compatible_agnostic_caller_nonstreaming_private_za_callee:
; CHECK:       // %bb.0:
; CHECK-NEXT:    stp d15, d14, [sp, #-112]! // 16-byte Folded Spill
; CHECK-NEXT:    stp d13, d12, [sp, #16] // 16-byte Folded Spill
; CHECK-NEXT:    mov x9, x0
; CHECK-NEXT:    stp d11, d10, [sp, #32] // 16-byte Folded Spill
; CHECK-NEXT:    stp d9, d8, [sp, #48] // 16-byte Folded Spill
; CHECK-NEXT:    stp x29, x30, [sp, #64] // 16-byte Folded Spill
; CHECK-NEXT:    bl __arm_get_current_vg
; CHECK-NEXT:    str x0, [sp, #80] // 8-byte Folded Spill
; CHECK-NEXT:    mov x0, x9
; CHECK-NEXT:    add x29, sp, #64
; CHECK-NEXT:    stp x20, x19, [sp, #96] // 16-byte Folded Spill
; CHECK-NEXT:    mov x8, x0
; CHECK-NEXT:    bl __arm_sme_state_size
; CHECK-NEXT:    sub sp, sp, x0
; CHECK-NEXT:    mov x19, sp
; CHECK-NEXT:    mov x0, x19
; CHECK-NEXT:    bl __arm_sme_save
; CHECK-NEXT:    bl __arm_sme_state
; CHECK-NEXT:    and x20, x0, #0x1
; CHECK-NEXT:    tbz w20, #0, .LBB5_2
; CHECK-NEXT:  // %bb.1:
; CHECK-NEXT:    smstop sm
; CHECK-NEXT:  .LBB5_2:
; CHECK-NEXT:    mov x0, x8
; CHECK-NEXT:    bl private_za_decl
; CHECK-NEXT:    mov x2, x0
; CHECK-NEXT:    tbz w20, #0, .LBB5_4
; CHECK-NEXT:  // %bb.3:
; CHECK-NEXT:    smstart sm
; CHECK-NEXT:  .LBB5_4:
; CHECK-NEXT:    mov x0, x19
; CHECK-NEXT:    bl __arm_sme_restore
; CHECK-NEXT:    mov x0, x19
; CHECK-NEXT:    bl __arm_sme_save
; CHECK-NEXT:    bl __arm_sme_state
; CHECK-NEXT:    and x20, x0, #0x1
; CHECK-NEXT:    tbz w20, #0, .LBB5_6
; CHECK-NEXT:  // %bb.5:
; CHECK-NEXT:    smstop sm
; CHECK-NEXT:  .LBB5_6:
; CHECK-NEXT:    mov x0, x2
; CHECK-NEXT:    bl private_za_decl
; CHECK-NEXT:    mov x1, x0
; CHECK-NEXT:    tbz w20, #0, .LBB5_8
; CHECK-NEXT:  // %bb.7:
; CHECK-NEXT:    smstart sm
; CHECK-NEXT:  .LBB5_8:
; CHECK-NEXT:    mov x0, x19
; CHECK-NEXT:    bl __arm_sme_restore
; CHECK-NEXT:    mov x0, x1
; CHECK-NEXT:    sub sp, x29, #64
; CHECK-NEXT:    ldp x20, x19, [sp, #96] // 16-byte Folded Reload
; CHECK-NEXT:    ldp x29, x30, [sp, #64] // 16-byte Folded Reload
; CHECK-NEXT:    ldp d9, d8, [sp, #48] // 16-byte Folded Reload
; CHECK-NEXT:    ldp d11, d10, [sp, #32] // 16-byte Folded Reload
; CHECK-NEXT:    ldp d13, d12, [sp, #16] // 16-byte Folded Reload
; CHECK-NEXT:    ldp d15, d14, [sp], #112 // 16-byte Folded Reload
; CHECK-NEXT:    ret
  %res = call i64 @private_za_decl(i64 %v)
  %res2 = call i64 @private_za_decl(i64 %res)
  ret i64 %res2
}