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|
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 4
; RUN: llc -mtriple=aarch64-linux-gnu -mattr=+sme2 -start-after=simplifycfg -enable-tail-merge=false -verify-machineinstrs < %s | FileCheck %s
declare void @callee();
;
; Private-ZA Callee
;
; Expect spill & fill of ZT0 around call
; Expect smstop/smstart za around call
define void @zt0_in_caller_no_state_callee() "aarch64_in_zt0" nounwind {
; CHECK-LABEL: zt0_in_caller_no_state_callee:
; CHECK: // %bb.0:
; CHECK-NEXT: sub sp, sp, #80
; CHECK-NEXT: stp x30, x19, [sp, #64] // 16-byte Folded Spill
; CHECK-NEXT: mov x19, sp
; CHECK-NEXT: str zt0, [x19]
; CHECK-NEXT: smstop za
; CHECK-NEXT: bl callee
; CHECK-NEXT: smstart za
; CHECK-NEXT: ldr zt0, [x19]
; CHECK-NEXT: ldp x30, x19, [sp, #64] // 16-byte Folded Reload
; CHECK-NEXT: add sp, sp, #80
; CHECK-NEXT: ret
call void @callee();
ret void;
}
; Expect spill & fill of ZT0 around call
; Expect setup and restore lazy-save around call
; Expect smstart za after call
define void @za_zt0_shared_caller_no_state_callee() "aarch64_inout_za" "aarch64_in_zt0" nounwind {
; CHECK-LABEL: za_zt0_shared_caller_no_state_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: sub sp, sp, #80
; CHECK-NEXT: rdsvl x8, #1
; CHECK-NEXT: mov x9, sp
; CHECK-NEXT: msub x9, x8, x8, x9
; CHECK-NEXT: mov sp, x9
; CHECK-NEXT: stur x9, [x29, #-16]
; CHECK-NEXT: sub x9, x29, #16
; CHECK-NEXT: sub x19, x29, #80
; CHECK-NEXT: sturh wzr, [x29, #-6]
; CHECK-NEXT: stur wzr, [x29, #-4]
; CHECK-NEXT: sturh w8, [x29, #-8]
; CHECK-NEXT: msr TPIDR2_EL0, x9
; CHECK-NEXT: str zt0, [x19]
; CHECK-NEXT: bl callee
; CHECK-NEXT: smstart za
; CHECK-NEXT: ldr zt0, [x19]
; CHECK-NEXT: mrs x8, TPIDR2_EL0
; CHECK-NEXT: sub x0, x29, #16
; CHECK-NEXT: cbnz x8, .LBB1_2
; CHECK-NEXT: // %bb.1:
; CHECK-NEXT: bl __arm_tpidr2_restore
; CHECK-NEXT: .LBB1_2:
; CHECK-NEXT: msr TPIDR2_EL0, xzr
; 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
call void @callee();
ret void;
}
;
; Shared-ZA Callee
;
; Caller and callee have shared ZT0 state, no spill/fill of ZT0 required
define void @zt0_shared_caller_zt0_shared_callee() "aarch64_in_zt0" nounwind {
; CHECK-LABEL: zt0_shared_caller_zt0_shared_callee:
; CHECK: // %bb.0:
; CHECK-NEXT: str x30, [sp, #-16]! // 8-byte Folded Spill
; CHECK-NEXT: bl callee
; CHECK-NEXT: ldr x30, [sp], #16 // 8-byte Folded Reload
; CHECK-NEXT: ret
call void @callee() "aarch64_in_zt0";
ret void;
}
; Expect spill & fill of ZT0 around call
define void @za_zt0_shared_caller_za_shared_callee() "aarch64_inout_za" "aarch64_in_zt0" nounwind {
; CHECK-LABEL: za_zt0_shared_caller_za_shared_callee:
; CHECK: // %bb.0:
; CHECK-NEXT: sub sp, sp, #80
; CHECK-NEXT: stp x30, x19, [sp, #64] // 16-byte Folded Spill
; CHECK-NEXT: mov x19, sp
; CHECK-NEXT: str zt0, [x19]
; CHECK-NEXT: bl callee
; CHECK-NEXT: ldr zt0, [x19]
; CHECK-NEXT: ldp x30, x19, [sp, #64] // 16-byte Folded Reload
; CHECK-NEXT: add sp, sp, #80
; CHECK-NEXT: ret
call void @callee() "aarch64_inout_za";
ret void;
}
; Caller and callee have shared ZA & ZT0
define void @za_zt0_shared_caller_za_zt0_shared_callee() "aarch64_inout_za" "aarch64_in_zt0" nounwind {
; CHECK-LABEL: za_zt0_shared_caller_za_zt0_shared_callee:
; CHECK: // %bb.0:
; CHECK-NEXT: str x30, [sp, #-16]! // 8-byte Folded Spill
; CHECK-NEXT: bl callee
; CHECK-NEXT: ldr x30, [sp], #16 // 8-byte Folded Reload
; CHECK-NEXT: ret
call void @callee() "aarch64_inout_za" "aarch64_in_zt0";
ret void;
}
; New-ZA Callee
; Expect spill & fill of ZT0 around call
; Expect smstop/smstart za around call
define void @zt0_in_caller_zt0_new_callee() "aarch64_in_zt0" nounwind {
; CHECK-LABEL: zt0_in_caller_zt0_new_callee:
; CHECK: // %bb.0:
; CHECK-NEXT: sub sp, sp, #80
; CHECK-NEXT: stp x30, x19, [sp, #64] // 16-byte Folded Spill
; CHECK-NEXT: mov x19, sp
; CHECK-NEXT: str zt0, [x19]
; CHECK-NEXT: smstop za
; CHECK-NEXT: bl callee
; CHECK-NEXT: smstart za
; CHECK-NEXT: ldr zt0, [x19]
; CHECK-NEXT: ldp x30, x19, [sp, #64] // 16-byte Folded Reload
; CHECK-NEXT: add sp, sp, #80
; CHECK-NEXT: ret
call void @callee() "aarch64_new_zt0";
ret void;
}
;
; New-ZA Caller
;
; Expect commit of lazy-save if ZA is dormant
; Expect smstart ZA & clear ZT0
; Before return, expect smstop ZA
define void @zt0_new_caller() "aarch64_new_zt0" nounwind {
; CHECK-LABEL: zt0_new_caller:
; CHECK: // %bb.0: // %prelude
; CHECK-NEXT: sub sp, sp, #80
; CHECK-NEXT: str x30, [sp, #64] // 8-byte Folded Spill
; CHECK-NEXT: mrs x8, TPIDR2_EL0
; CHECK-NEXT: cbz x8, .LBB6_2
; CHECK-NEXT: // %bb.1: // %save.za
; CHECK-NEXT: mov x8, sp
; CHECK-NEXT: str zt0, [x8]
; CHECK-NEXT: bl __arm_tpidr2_save
; CHECK-NEXT: ldr zt0, [x8]
; CHECK-NEXT: msr TPIDR2_EL0, xzr
; CHECK-NEXT: .LBB6_2:
; CHECK-NEXT: smstart za
; CHECK-NEXT: zero { zt0 }
; CHECK-NEXT: bl callee
; CHECK-NEXT: smstop za
; CHECK-NEXT: ldr x30, [sp, #64] // 8-byte Folded Reload
; CHECK-NEXT: add sp, sp, #80
; CHECK-NEXT: ret
call void @callee() "aarch64_in_zt0";
ret void;
}
; Expect commit of lazy-save if ZA is dormant
; Expect smstart ZA, clear ZA & clear ZT0
; Before return, expect smstop ZA
define void @new_za_zt0_caller() "aarch64_new_za" "aarch64_new_zt0" nounwind {
; CHECK-LABEL: new_za_zt0_caller:
; CHECK: // %bb.0: // %prelude
; CHECK-NEXT: sub sp, sp, #80
; CHECK-NEXT: str x30, [sp, #64] // 8-byte Folded Spill
; CHECK-NEXT: mrs x8, TPIDR2_EL0
; CHECK-NEXT: cbz x8, .LBB7_2
; CHECK-NEXT: // %bb.1: // %save.za
; CHECK-NEXT: mov x8, sp
; CHECK-NEXT: str zt0, [x8]
; CHECK-NEXT: bl __arm_tpidr2_save
; CHECK-NEXT: ldr zt0, [x8]
; CHECK-NEXT: msr TPIDR2_EL0, xzr
; CHECK-NEXT: .LBB7_2:
; CHECK-NEXT: smstart za
; CHECK-NEXT: zero {za}
; CHECK-NEXT: zero { zt0 }
; CHECK-NEXT: bl callee
; CHECK-NEXT: smstop za
; CHECK-NEXT: ldr x30, [sp, #64] // 8-byte Folded Reload
; CHECK-NEXT: add sp, sp, #80
; CHECK-NEXT: ret
call void @callee() "aarch64_inout_za" "aarch64_in_zt0";
ret void;
}
; Expect clear ZA on entry
define void @new_za_shared_zt0_caller() "aarch64_new_za" "aarch64_in_zt0" nounwind {
; CHECK-LABEL: new_za_shared_zt0_caller:
; CHECK: // %bb.0:
; CHECK-NEXT: str x30, [sp, #-16]! // 8-byte Folded Spill
; CHECK-NEXT: zero {za}
; CHECK-NEXT: bl callee
; CHECK-NEXT: ldr x30, [sp], #16 // 8-byte Folded Reload
; CHECK-NEXT: ret
call void @callee() "aarch64_inout_za" "aarch64_in_zt0";
ret void;
}
; Expect clear ZT0 on entry
define void @shared_za_new_zt0() "aarch64_inout_za" "aarch64_new_zt0" nounwind {
; CHECK-LABEL: shared_za_new_zt0:
; CHECK: // %bb.0:
; CHECK-NEXT: str x30, [sp, #-16]! // 8-byte Folded Spill
; CHECK-NEXT: zero { zt0 }
; CHECK-NEXT: bl callee
; CHECK-NEXT: ldr x30, [sp], #16 // 8-byte Folded Reload
; CHECK-NEXT: ret
call void @callee() "aarch64_inout_za" "aarch64_in_zt0";
ret void;
}
|
