# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py UTC_ARGS: --version 4
# RUN: llc -mtriple=arm64-apple-macosx -mcpu=apple-m1 -stress-regalloc=4 -verify-regalloc -run-pass=greedy -o - %s | FileCheck %s

--- |
  define void @inst_stores_to_dead_spill_implicit_def_impdef() {
    ret void
  }

  define void @inst_stores_to_dead_spill_movimm_impdef() {
    ret void
  }

  declare void @foo(ptr, i32, ...)

...

# The IMPLICIT_DEf has an implicit-def of a different virtual register
# than the main def, so it should not be unconditionally treated as
# rematerializable.

---
name:            inst_stores_to_dead_spill_implicit_def_impdef
tracksRegLiveness: true
frameInfo:
  hasCalls:        true
body:             |
  bb.0:
    liveins: $x0, $x1
    ; CHECK-LABEL: name: inst_stores_to_dead_spill_implicit_def_impdef
    ; CHECK: liveins: $x0, $x1
    ; CHECK-NEXT: {{  $}}
    ; CHECK-NEXT: STRXui $x0, %stack.0, 0 :: (store (s64) into %stack.0)
    ; CHECK-NEXT: dead undef [[COPY:%[0-9]+]].sub_32:gpr64 = COPY $x1
    ; CHECK-NEXT: dead undef [[DEF:%[0-9]+]].sub_32:gpr64 = IMPLICIT_DEF implicit-def %6
    ; CHECK-NEXT: STRXui %6, %stack.1, 0 :: (store (s64) into %stack.1)
    ; CHECK-NEXT: ADJCALLSTACKDOWN 8, 0, implicit-def dead $sp, implicit $sp
    ; CHECK-NEXT: BL @foo, csr_darwin_aarch64_aapcs, implicit-def dead $lr, implicit $sp, implicit-def $sp
    ; CHECK-NEXT: ADJCALLSTACKUP 8, 0, implicit-def dead $sp, implicit $sp
    ; CHECK-NEXT: [[LDRXui:%[0-9]+]]:gpr64common = LDRXui %stack.0, 0 :: (load (s64) from %stack.0)
    ; CHECK-NEXT: [[LDRXui1:%[0-9]+]]:gpr64 = LDRXui %stack.1, 0 :: (load (s64) from %stack.1)
    ; CHECK-NEXT: STRXui [[LDRXui1]], [[LDRXui]], 1 :: (store (s64) into stack + 8)
    ; CHECK-NEXT: STRXui undef %8:gpr64, [[LDRXui]], 0 :: (store (s64) into stack)
    ; CHECK-NEXT: RET_ReallyLR
    %0:gpr64sp = COPY $x0
    undef %1.sub_32:gpr64 = COPY $x1
    undef %2.sub_32:gpr64 = IMPLICIT_DEF implicit-def %1
    ADJCALLSTACKDOWN 8, 0, implicit-def dead $sp, implicit $sp
    BL @foo, csr_darwin_aarch64_aapcs, implicit-def dead $lr, implicit $sp, implicit-def $sp
    ADJCALLSTACKUP 8, 0, implicit-def dead $sp, implicit $sp
    STRXui %1, %0, 1 :: (store (s64) into stack + 8)
    STRXui undef %1, %0, 0 :: (store (s64) into stack)
    RET_ReallyLR

...

# Same function, except with a rematerializable mov imm instead of
# IMPLICIT_DEF
---
name:            inst_stores_to_dead_spill_movimm_impdef
tracksRegLiveness: true
frameInfo:
  hasCalls:        true
body:             |
  bb.0:
    liveins: $x0, $x1
    ; CHECK-LABEL: name: inst_stores_to_dead_spill_movimm_impdef
    ; CHECK: liveins: $x0, $x1
    ; CHECK-NEXT: {{  $}}
    ; CHECK-NEXT: STRXui $x0, %stack.0, 0 :: (store (s64) into %stack.0)
    ; CHECK-NEXT: dead undef [[COPY:%[0-9]+]].sub_32:gpr64 = COPY $x1
    ; CHECK-NEXT: dead undef [[MOVi32imm:%[0-9]+]].sub_32:gpr64 = MOVi32imm 4, implicit-def %6
    ; CHECK-NEXT: STRXui %6, %stack.1, 0 :: (store (s64) into %stack.1)
    ; CHECK-NEXT: ADJCALLSTACKDOWN 8, 0, implicit-def dead $sp, implicit $sp
    ; CHECK-NEXT: BL @foo, csr_darwin_aarch64_aapcs, implicit-def dead $lr, implicit $sp, implicit-def $sp
    ; CHECK-NEXT: ADJCALLSTACKUP 8, 0, implicit-def dead $sp, implicit $sp
    ; CHECK-NEXT: [[LDRXui:%[0-9]+]]:gpr64common = LDRXui %stack.0, 0 :: (load (s64) from %stack.0)
    ; CHECK-NEXT: [[LDRXui1:%[0-9]+]]:gpr64 = LDRXui %stack.1, 0 :: (load (s64) from %stack.1)
    ; CHECK-NEXT: STRXui [[LDRXui1]], [[LDRXui]], 1 :: (store (s64) into stack + 8)
    ; CHECK-NEXT: STRXui undef %8:gpr64, [[LDRXui]], 0 :: (store (s64) into stack)
    ; CHECK-NEXT: RET_ReallyLR
    %0:gpr64sp = COPY $x0
    undef %1.sub_32:gpr64 = COPY $x1
    undef %2.sub_32:gpr64 = MOVi32imm 4, implicit-def %1
    ADJCALLSTACKDOWN 8, 0, implicit-def dead $sp, implicit $sp
    BL @foo, csr_darwin_aarch64_aapcs, implicit-def dead $lr, implicit $sp, implicit-def $sp
    ADJCALLSTACKUP 8, 0, implicit-def dead $sp, implicit $sp
    STRXui %1, %0, 1 :: (store (s64) into stack + 8)
    STRXui undef %1, %0, 0 :: (store (s64) into stack)
    RET_ReallyLR

...