test/CodeGen/AArch64/tailcall-ccmismatch.ll

   1 ; RUN: llc -o - %s | FileCheck %s
   2 target triple="aarch64--"
   3
   4 declare void @somefunc()
   5 define preserve_mostcc void @test_ccmismatch_notail() {
   6 ; Ensure that no tail call is used here, as the called function somefunc does
   7 ; not preserve enough registers for preserve_mostcc.
   8 ; CHECK-LABEL: test_ccmismatch_notail:
   9 ; CHECK-NOT: b somefunc
  10 ; CHECK: bl somefunc
  11   tail call void @somefunc()
  12   ret void
  13 }
  14
  15 declare preserve_mostcc void @some_preserve_most_func()
  16 define void @test_ccmismatch_tail() {
  17 ; We can perform a tail call here, because some_preserve_most_func preserves
  18 ; all registers necessary for test_ccmismatch_tail.
  19 ; CHECK-LABEL: test_ccmismatch_tail:
  20 ; CHECK-NOT: bl some_preserve_most_func
  21 ; CHECK: b some_preserve_most_func
  22   tail call preserve_mostcc void @some_preserve_most_func()
  23   ret void
  24 }