# RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx900 -passes="require<machine-loops>,si-late-branch-lowering,print<machine-loops>" -debug-pass-manager -filetype=null %s 2>&1 | FileCheck %s

# Test that MachineLoopInfo is preserved when splitting a block inside a loop
# due to early termination handling.

# CHECK: Running analysis: MachineLoopAnalysis on early_term_in_loop
# CHECK-NEXT: Running analysis: MachineDominatorTreeAnalysis on early_term_in_loop
# CHECK-NEXT: Running pass: SILateBranchLoweringPass on early_term_in_loop
# CHECK-NEXT: Running pass: MachineLoopPrinterPass on early_term_in_loop
# CHECK-NEXT: Machine loop info for machine function 'early_term_in_loop':
# CHECK-NOT: Running analysis: MachineLoopAnalysis on early_term_in_loop
# CHECK-NEXT: Loop at depth 1 containing: %bb.1<header><exiting>,%bb.4<latch><exiting>

---
name: early_term_in_loop
tracksRegLiveness: true
body: |
  bb.0:
    successors: %bb.1
    $vgpr0 = V_MOV_B32_e32 0, implicit $exec

  ; Loop header contains SI_EARLY_TERMINATE_SCC0 followed by more instructions.
  ; This triggers block splitting. Both bb.1 and bb.4 must remain in the loop.
  bb.1:
    liveins: $vgpr0
    successors: %bb.1, %bb.2
    S_CMP_LG_U32 0, 1, implicit-def $scc
    SI_EARLY_TERMINATE_SCC0 implicit $scc, implicit $exec
    $vgpr1 = V_MOV_B32_e32 1, implicit $exec
    S_CBRANCH_SCC1 %bb.1, implicit $scc

  bb.2:
    liveins: $vgpr0, $vgpr1
    EXP_DONE 0, $vgpr0, $vgpr0, $vgpr0, $vgpr0, -1, -1, 15, implicit $exec
    S_ENDPGM 0
...