llvm-mirror/test/Transforms/LCSSA/2006-10-31-UnreachableBlock-2.ll

; RUN: llvm-upgrade < %s | llvm-as | opt -lcssa -disable-output
; PR977

declare int %opost_block()

void %write_chan() {
entry:
	br bool false, label %shortcirc_next.0, label %shortcirc_done.0

shortcirc_next.0:		; preds = %entry
	br label %shortcirc_done.0

shortcirc_done.0:		; preds = %shortcirc_next.0, %entry
	br bool false, label %shortcirc_next.1, label %shortcirc_done.1

shortcirc_next.1:		; preds = %shortcirc_done.0
	br label %shortcirc_done.1

shortcirc_done.1:		; preds = %shortcirc_next.1, %shortcirc_done.0
	br bool false, label %then.0, label %endif.0

then.0:		; preds = %shortcirc_done.1
	br bool false, label %then.1, label %endif.1

then.1:		; preds = %then.0
	br label %return

after_ret.0:		; No predecessors!
	br label %endif.1

endif.1:		; preds = %after_ret.0, %then.0
	br label %endif.0

endif.0:		; preds = %endif.1, %shortcirc_done.1
	br label %loopentry.0

loopentry.0:		; preds = %endif.12, %endif.0
	br bool false, label %then.2, label %endif.2

then.2:		; preds = %loopentry.0
	br label %loopexit.0

dead_block_after_break.0:		; No predecessors!
	br label %endif.2

endif.2:		; preds = %dead_block_after_break.0, %loopentry.0
	br bool false, label %shortcirc_done.2, label %shortcirc_next.2

shortcirc_next.2:		; preds = %endif.2
	br bool false, label %shortcirc_next.3, label %shortcirc_done.3

shortcirc_next.3:		; preds = %shortcirc_next.2
	br label %shortcirc_done.3

shortcirc_done.3:		; preds = %shortcirc_next.3, %shortcirc_next.2
	br label %shortcirc_done.2

shortcirc_done.2:		; preds = %shortcirc_done.3, %endif.2
	br bool false, label %then.3, label %endif.3

then.3:		; preds = %shortcirc_done.2
	br label %loopexit.0

dead_block_after_break.1:		; No predecessors!
	br label %endif.3

endif.3:		; preds = %dead_block_after_break.1, %shortcirc_done.2
	br bool false, label %shortcirc_next.4, label %shortcirc_done.4

shortcirc_next.4:		; preds = %endif.3
	br label %shortcirc_done.4

shortcirc_done.4:		; preds = %shortcirc_next.4, %endif.3
	br bool false, label %then.4, label %else

then.4:		; preds = %shortcirc_done.4
	br label %loopentry.1

loopentry.1:		; preds = %endif.8, %then.4
	br bool false, label %no_exit, label %loopexit.1

no_exit:		; preds = %loopentry.1
	%tmp.94 = call int %opost_block( )		; <int> [#uses=1]
	br bool false, label %then.5, label %endif.5

then.5:		; preds = %no_exit
	br bool false, label %then.6, label %endif.6

then.6:		; preds = %then.5
	br label %loopexit.1

dead_block_after_break.2:		; No predecessors!
	br label %endif.6

endif.6:		; preds = %dead_block_after_break.2, %then.5
	br label %break_out

dead_block_after_goto.0:		; No predecessors!
	br label %endif.5

endif.5:		; preds = %dead_block_after_goto.0, %no_exit
	br bool false, label %then.7, label %endif.7

then.7:		; preds = %endif.5
	br label %loopexit.1

dead_block_after_break.3:		; No predecessors!
	br label %endif.7

endif.7:		; preds = %dead_block_after_break.3, %endif.5
	switch uint 1, label %switchexit [
		 uint 4, label %label.2
		 uint 2, label %label.1
		 uint 1, label %label.0
	]

label.0:		; preds = %endif.7
	br label %switchexit

dead_block_after_break.4:		; No predecessors!
	br label %label.1

label.1:		; preds = %dead_block_after_break.4, %endif.7
	br label %switchexit

dead_block_after_break.5:		; No predecessors!
	br label %label.2

label.2:		; preds = %dead_block_after_break.5, %endif.7
	br label %switchexit

dead_block_after_break.6:		; No predecessors!
	br label %switchexit

switchexit:		; preds = %dead_block_after_break.6, %label.2, %label.1, %label.0, %endif.7
	br bool false, label %then.8, label %endif.8

then.8:		; preds = %switchexit
	br label %loopexit.1

dead_block_after_break.7:		; No predecessors!
	br label %endif.8

endif.8:		; preds = %dead_block_after_break.7, %switchexit
	br label %loopentry.1

loopexit.1:		; preds = %then.8, %then.7, %then.6, %loopentry.1
	br bool false, label %then.9, label %endif.9

then.9:		; preds = %loopexit.1
	br label %endif.9

endif.9:		; preds = %then.9, %loopexit.1
	br label %endif.4

else:		; preds = %shortcirc_done.4
	br bool false, label %then.10, label %endif.10

then.10:		; preds = %else
	br label %break_out

dead_block_after_goto.1:		; No predecessors!
	br label %endif.10

endif.10:		; preds = %dead_block_after_goto.1, %else
	br label %endif.4

endif.4:		; preds = %endif.10, %endif.9
	br bool false, label %then.11, label %endif.11

then.11:		; preds = %endif.4
	br label %loopexit.0

dead_block_after_break.8:		; No predecessors!
	br label %endif.11

endif.11:		; preds = %dead_block_after_break.8, %endif.4
	br bool false, label %then.12, label %endif.12

then.12:		; preds = %endif.11
	br label %loopexit.0

dead_block_after_break.9:		; No predecessors!
	br label %endif.12

endif.12:		; preds = %dead_block_after_break.9, %endif.11
	br label %loopentry.0

loopexit.0:		; preds = %then.12, %then.11, %then.3, %then.2
	br label %break_out

break_out:		; preds = %loopexit.0, %then.10, %endif.6
	%retval.3 = phi int [ 0, %loopexit.0 ], [ %tmp.94, %endif.6 ], [ 0, %then.10 ]		; <int> [#uses=0]
	br bool false, label %cond_true, label %cond_false

cond_true:		; preds = %break_out
	br label %cond_continue

cond_false:		; preds = %break_out
	br label %cond_continue

cond_continue:		; preds = %cond_false, %cond_true
	br label %return

after_ret.1:		; No predecessors!
	br label %return

return:		; preds = %after_ret.1, %cond_continue, %then.1
	ret void
}