The -adce pass crashes optimizing this function:

declare void %exp()

void %_ZN10polynomialIdE11inverse_fftERKS_ISt7complexIdEE() {
entry:
        invoke void %exp( )
                        to label %tmp.0.i.noexc unwind label %invoke_catch.0

invoke_catch.0:         ; preds = %entry
        br bool false, label %UnifiedUnwindBlock, label %cond_true.i.i

cond_true.i.i:          ; preds = %invoke_catch.0
        ret void

tmp.0.i.noexc:          ; preds = %entry
        ret void

UnifiedUnwindBlock:             ; preds = %invoke_catch.0
        unwind
}

Here's a reduced testcase:

void %test() {
entry:
	br label %UnifiedReturnBlock

UnifiedReturnBlock:
	ret void

invoke_catch.0:		; No predecessors!
	br bool false, label %UnifiedUnwindBlock, label %UnifiedReturnBlock

UnifiedUnwindBlock:
	unwind

}

Fixed.  Testcase here: ADCE/2004-05-04-UnreachableBlock.ll

Patch here:
http://mail.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20040503/014111.html

-Chris