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; This (complex) testcase causes an assertion failure because a preheader is
; inserted for the "fail" loop, but the exit block of a loop is not updated
; to be the preheader instead of the exit loop itself.
; RUN: opt < %s -passes=loop-simplify
define i32 @re_match_2() {
br label %loopentry.1
loopentry.1: ; preds = %endif.82, %0
br label %shortcirc_done.36
shortcirc_done.36: ; preds = %loopentry.1
br i1 false, label %fail, label %endif.40
endif.40: ; preds = %shortcirc_done.36
br label %loopexit.20
loopentry.20: ; preds = %endif.46
br label %loopexit.20
loopexit.20: ; preds = %loopentry.20, %endif.40
br label %loopentry.21
loopentry.21: ; preds = %no_exit.19, %loopexit.20
br i1 false, label %no_exit.19, label %loopexit.21
no_exit.19: ; preds = %loopentry.21
br i1 false, label %fail, label %loopentry.21
loopexit.21: ; preds = %loopentry.21
br label %endif.45
endif.45: ; preds = %loopexit.21
br label %cond_true.15
cond_true.15: ; preds = %endif.45
br i1 false, label %fail, label %endif.46
endif.46: ; preds = %cond_true.15
br label %loopentry.20
fail: ; preds = %loopexit.37, %cond_true.15, %no_exit.19, %shortcirc_done.36
br label %then.80
then.80: ; preds = %fail
br label %endif.81
endif.81: ; preds = %then.80
br label %loopexit.37
loopexit.37: ; preds = %endif.81
br i1 false, label %fail, label %endif.82
endif.82: ; preds = %loopexit.37
br label %loopentry.1
}
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