test/CodeGen/PowerPC/tls_get_addr_fence1.mir

# ADJCALLSTACKDOWN and ADJCALLSTACKUP must be generated around TLS pseudo code as scheduling fence (PR25839).
# RUN: llc -mtriple=powerpc64le-linux-gnu -run-pass=ppc-tls-dynamic-call -verify-machineinstrs -o - %s | FileCheck %s

--- |
  target datalayout = "e-m:e-i64:64-n32:64"
  target triple = "powerpc64le-unknown-linux-gnu"
  
  @tls_var = external thread_local local_unnamed_addr global i32
  
  define i32 @tls_func() local_unnamed_addr {
  entry:
    %0 = load i32, i32* @tls_var
    ret i32 %0
  }

...
---
name:            tls_func
alignment:       4
exposesReturnsTwice: false
legalized:       false
regBankSelected: false
selected:        false
tracksRegLiveness: true
registers:       
  - { id: 0, class: g8rc_and_g8rc_nox0, preferred-register: '' }
  - { id: 1, class: g8rc_and_g8rc_nox0, preferred-register: '' }
  - { id: 2, class: g8rc, preferred-register: '' }
liveins:         
  - { reg: '%x2' }
frameInfo:       
  isFrameAddressTaken: false
  isReturnAddressTaken: false
  hasStackMap:     false
  hasPatchPoint:   false
  stackSize:       0
  offsetAdjustment: 0
  maxAlignment:    0
  adjustsStack:    false
  hasCalls:        false
  stackProtector:  ''
  maxCallFrameSize: 4294967295
  hasOpaqueSPAdjustment: false
  hasVAStart:      false
  hasMustTailInVarArgFunc: false
  savePoint:       ''
  restorePoint:    ''
fixedStack:      
stack:           
constants:       
body:             |
  bb.0.entry:
    liveins: %x2
    %0 = ADDIStlsgdHA %x2, @tls_var
    %1 = ADDItlsgdLADDR killed %0, @tls_var, @tls_var, implicit-def dead %x0, implicit-def dead %x3, implicit-def dead %x4, implicit-def dead %x5, implicit-def dead %x6, implicit-def dead %x7, implicit-def dead %x8, implicit-def dead %x9, implicit-def dead %x10, implicit-def dead %x11, implicit-def dead %x12, implicit-def dead %lr8, implicit-def dead %ctr8, implicit-def dead %cr0, implicit-def dead %cr1, implicit-def dead %cr5, implicit-def dead %cr6, implicit-def dead %cr7
    %2 = LWZ8 0, killed %1 :: (dereferenceable load 4 from @tls_var)
    %x3 = COPY %2
    BLR8 implicit %lr8, implicit %rm, implicit %x3
    ; CHECK-LABEL: bb.0.entry
    ; CHECK: %[[reg1:[0-9]+]] = ADDIStlsgdHA %x2, @tls_var
    ; CHECK: ADJCALLSTACKDOWN 0, 0
    ; CHECK: %x3 = ADDItlsgdL %[[reg1]], @tls_var
    ; CHECK: %x3 = GETtlsADDR %x3, @tls_var
    ; CHECK: ADJCALLSTACKUP 0, 0
    ; CHECK: BLR8
...