llvm/test/Transforms/ADCE/broken-loop-info.ll

   1 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
   2 ; RUN: opt -passes='loop-mssa(licm),adce,loop-mssa(licm)' -S < %s | FileCheck %s
   3 ;
   4
   5 target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128-ni:1-p2:32:8:8:32-ni:2"
   6 target triple = "x86_64-unknown-linux-gnu"
   7
   8 define void @test() {
   9 ; CHECK-LABEL: @test(
  10 ; CHECK-NEXT:  bb:
  11 ; CHECK-NEXT:    br label [[BB2:%.*]]
  12 ; CHECK:       bb1:
  13 ; CHECK-NEXT:    ret void
  14 ; CHECK:       bb2:
  15 ; CHECK-NEXT:    br label [[BB4:%.*]]
  16 ; CHECK:       bb3:
  17 ; CHECK-NEXT:    unreachable
  18 ; CHECK:       bb4:
  19 ; CHECK-NEXT:    br i1 true, label [[BB1:%.*]], label [[BB2]]
  20 ;
  21
  22 bb:
  23   br label %bb2
  24
  25 bb1:                                              ; preds = %bb4
  26   ret void
  27
  28 bb2:                                              ; preds = %bb4, %bb
  29   br i1 undef, label %bb4, label %bb3
  30
  31 bb3:                                              ; preds = %bb2
  32   br label %bb4
  33
  34 bb4:                                              ; preds = %bb3, %bb2
  35   br i1 undef, label %bb1, label %bb2
  36 }