| ; RUN: opt < %s -gvn | llvm-dis | 
 | target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128" | 
 | target triple = "i386-apple-darwin7" | 
 |  | 
 | define i32 @main(i32 %argc, i8** %argv) nounwind { | 
 | entry: | 
 | 	br label %bb84 | 
 |  | 
 | bb41:		; preds = %bb82 | 
 | 	%tmp = load i8, i8* %opt.0, align 1		; <i8> [#uses=0] | 
 | 	%tmp1 = getelementptr i8, i8* %opt.0, i32 1		; <i8*> [#uses=2] | 
 | 	switch i32 0, label %bb81 [ | 
 | 		i32 102, label %bb82 | 
 | 		i32 110, label %bb79 | 
 | 		i32 118, label %bb80 | 
 | 	] | 
 |  | 
 | bb79:		; preds = %bb41 | 
 | 	br label %bb82 | 
 |  | 
 | bb80:		; preds = %bb41 | 
 | 	ret i32 0 | 
 |  | 
 | bb81:		; preds = %bb41 | 
 | 	ret i32 1 | 
 |  | 
 | bb82:		; preds = %bb84, %bb79, %bb41 | 
 | 	%opt.0 = phi i8* [ %tmp3, %bb84 ], [ %tmp1, %bb79 ], [ %tmp1, %bb41 ]		; <i8*> [#uses=3] | 
 | 	%tmp2 = load i8, i8* %opt.0, align 1		; <i8> [#uses=0] | 
 | 	br i1 false, label %bb84, label %bb41 | 
 |  | 
 | bb84:		; preds = %bb82, %entry | 
 | 	%tmp3 = getelementptr i8, i8* null, i32 1		; <i8*> [#uses=1] | 
 | 	br label %bb82 | 
 | } |