llvm/test/CodeGen/X86/cfi-epilogue-with-return.mir

# RUN: llc -o - %s -mtriple=x86_64-- -run-pass=prologepilog 2>&1 | FileCheck %s
--- |
  define i64 @_Z3foob(i1 zeroext %cond) #0 {
    ret i64 0
  }
  attributes #0 = {"frame-pointer"="all"}
...
---
# If the epilogue bb.1 is a return block, no .cfi_restore is
# needed in it.
# CHECK:    bb.1:
# CHECK-NOT:  CFI_INSTRUCTION restore
# CHECK:      RET 0
# CHECK:    bb.2:
# CHECK:      RET 0
name:            _Z3foob
alignment:       16
tracksRegLiveness: true
liveins:
  - { reg: '$edi' }
frameInfo:
  maxAlignment:    1
  hasCalls:        true
  savePoint:       '%bb.1'
  restorePoint:    '%bb.1'
machineFunctionInfo: {}
body:             |
  bb.0:
    liveins: $edi
  
    TEST8rr renamable $dil, renamable $dil, implicit-def $eflags, implicit killed $edi
    JCC_1 %bb.2, 4, implicit killed $eflags
    JMP_1 %bb.1
  
  bb.1:
    renamable $rbx = IMPLICIT_DEF
    renamable $r14 = IMPLICIT_DEF
    renamable $r15 = IMPLICIT_DEF
    renamable $r12 = IMPLICIT_DEF
    renamable $r13 = IMPLICIT_DEF
    dead $eax = MOV32r0 implicit-def dead $eflags, implicit-def $rax
    RET 0, killed $rax
  
  bb.2:
    dead $eax = MOV32r0 implicit-def dead $eflags, implicit-def $rax
    RET 0, killed $rax

...