llvm/test/CodeGen/AArch64/split-deadloop.mir

# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py UTC_ARGS: --version 3
# RUN: llc -o - %s -run-pass=greedy | FileCheck %s
#
# Make sure we don't run into dead loop when split register with a hint.

--- |
  target datalayout = "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128"
  target triple = "aarch64-none-linux-gnu"

  define void @foo(ptr %0, i32 %1) gc "statepoint-example" personality ptr null {
  bci_0:
    unreachable

  bci_19:
    unreachable

  bci_10:
    unreachable
  }

...
---
name:            foo
alignment:       4
exposesReturnsTwice: false
legalized:       false
regBankSelected: false
selected:        false
failedISel:      false
tracksRegLiveness: true
hasWinCFI:       false
callsEHReturn:   false
callsUnwindInit: false
hasEHContTarget: false
hasEHScopes:     false
hasEHFunclets:   false
isOutlined:      false
debugInstrRef:   false
failsVerification: false
tracksDebugUserValues: false
registers:
  - { id: 0, class: gpr64, preferred-register: '' }
  - { id: 1, class: gpr32, preferred-register: '' }
  - { id: 2, class: gpr32, preferred-register: '' }
  - { id: 3, class: gpr64all, preferred-register: '' }
  - { id: 4, class: gpr64all, preferred-register: '' }
  - { id: 5, class: gpr32all, preferred-register: '' }
liveins:
  - { reg: '$w1', virtual-reg: '%1' }
frameInfo:
  isFrameAddressTaken: false
  isReturnAddressTaken: false
  hasStackMap:     false
  hasPatchPoint:   false
  stackSize:       0
  offsetAdjustment: 0
  maxAlignment:    1
  adjustsStack:    true
  hasCalls:        true
  stackProtector:  ''
  functionContext: ''
  maxCallFrameSize: 0
  cvBytesOfCalleeSavedRegisters: 0
  hasOpaqueSPAdjustment: false
  hasVAStart:      false
  hasMustTailInVarArgFunc: false
  hasTailCall:     false
  localFrameSize:  0
  savePoint:       []
  restorePoint:    []
fixedStack:      []
stack:           []
entry_values:    []
callSites:       []
debugValueSubstitutions: []
constants:       []
machineFunctionInfo: {}
body:             |
  ; CHECK-LABEL: name: foo
  ; CHECK: bb.0.bci_0:
  ; CHECK-NEXT:   successors: %bb.1(0x80000000)
  ; CHECK-NEXT:   liveins: $w1
  ; CHECK-NEXT: {{  $}}
  ; CHECK-NEXT:   [[COPY:%[0-9]+]]:gpr32 = COPY $w1
  ; CHECK-NEXT: {{  $}}
  ; CHECK-NEXT: bb.1.bci_19:
  ; CHECK-NEXT:   ADJCALLSTACKDOWN 0, 0, implicit-def dead $sp, implicit $sp
  ; CHECK-NEXT:   $x0 = COPY $xzr
  ; CHECK-NEXT:   STATEPOINT 0, 0, 1, $xzr, killed $x0, 2, 0, 2, 0, 2, 33, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, [[COPY]], 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 1, 2, 0, 2, 0, 2, 1, 0, 0, csr_aarch64_aapcs, implicit-def $sp, implicit-def dead $x0, implicit-def dead early-clobber $lr
  ; CHECK-NEXT:   ADJCALLSTACKUP 0, 0, implicit-def dead $sp, implicit $sp
  ; CHECK-NEXT:   ADJCALLSTACKDOWN 0, 0, implicit-def dead $sp, implicit $sp
  ; CHECK-NEXT:   $w0 = COPY $wzr
  ; CHECK-NEXT:   STATEPOINT 0, 0, 1, $xzr, killed $w0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, csr_aarch64_aapcs, implicit-def $sp, implicit-def dead early-clobber $lr
  ; CHECK-NEXT:   ADJCALLSTACKUP 0, 0, implicit-def dead $sp, implicit $sp
  bb.0.bci_0:
    successors: %bb.1(0x80000000)
    liveins: $w1

    %1:gpr32 = COPY $w1

  bb.1.bci_19:
    ADJCALLSTACKDOWN 0, 0, implicit-def dead $sp, implicit $sp
    $x0 = COPY $xzr
    STATEPOINT 0, 0, 1, $xzr, killed $x0, 2, 0, 2, 0, 2, 33, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, %1, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 1, 2, 0, 2, 0, 2, 1, 0, 0, csr_aarch64_aapcs, implicit-def $sp, implicit-def dead $x0, implicit-def dead early-clobber $lr
    ADJCALLSTACKUP 0, 0, implicit-def dead $sp, implicit $sp
    ADJCALLSTACKDOWN 0, 0, implicit-def dead $sp, implicit $sp
    $w0 = COPY $wzr
    STATEPOINT 0, 0, 1, $xzr, killed $w0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, csr_aarch64_aapcs, implicit-def $sp, implicit-def dead early-clobber $lr
    ADJCALLSTACKUP 0, 0, implicit-def dead $sp, implicit $sp

...