File: 2012-04-02-IndirectBr.ll

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llvm-toolchain-20 1%3A20.1.6-1~exp1
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; RUN: opt < %s -S -passes="loop-mssa(simple-loop-unswitch)" -verify-loop-info -verify-dom-info -verify-memoryssa | FileCheck %s
; PR12343: -passes=simple-loop-unswitch crash on indirect branch

; CHECK:       %0 = icmp eq i64 undef, 0
; CHECK-NEXT:  br i1 %0, label %"5", label %"4"

; CHECK:       "5":                                              ; preds = %entry
; CHECK-NEXT:  br label %"16"

; CHECK:       "16":                                             ; preds = %"22", %"5"
; CHECK-NEXT:  indirectbr ptr undef, [label %"22", label %"33"]

; CHECK:       "22":                                             ; preds = %"16"
; CHECK-NEXT:  br i1 %0, label %"16", label %"26"

; CHECK:       "26":                                             ; preds = %"22"
; CHECK-NEXT:  unreachable

define void @foo() {
entry:
  %0 = icmp eq i64 undef, 0
  br i1 %0, label %"5", label %"4"

"4":                                              ; preds = %entry
  unreachable

"5":                                              ; preds = %entry
  br label %"16"

"16":                                             ; preds = %"22", %"5"
  indirectbr ptr undef, [label %"22", label %"33"]

"22":                                             ; preds = %"16"
  br i1 %0, label %"16", label %"26"

"26":                                             ; preds = %"22"
  unreachable

"33":                                             ; preds = %"16"
  unreachable
}