|  | ; RUN: llc < %s -mtriple=x86_64-apple-darwin11 -relocation-model=pic -disable-fp-elim -stats |& not grep ext-opt | 
|  |  | 
|  | define fastcc i8* @S_scan_str(i8* %start, i32 %keep_quoted, i32 %keep_delims) nounwind ssp { | 
|  | entry: | 
|  | switch i8 undef, label %bb6 [ | 
|  | i8 9, label %bb5 | 
|  | i8 32, label %bb5 | 
|  | i8 10, label %bb5 | 
|  | i8 13, label %bb5 | 
|  | i8 12, label %bb5 | 
|  | ] | 
|  |  | 
|  | bb5:                                              ; preds = %entry, %entry, %entry, %entry, %entry | 
|  | br label %bb6 | 
|  |  | 
|  | bb6:                                              ; preds = %bb5, %entry | 
|  | br i1 undef, label %bb7, label %bb9 | 
|  |  | 
|  | bb7:                                              ; preds = %bb6 | 
|  | unreachable | 
|  |  | 
|  | bb9:                                              ; preds = %bb6 | 
|  | %0 = load i8* undef, align 1                    ; <i8> [#uses=3] | 
|  | br i1 undef, label %bb12, label %bb10 | 
|  |  | 
|  | bb10:                                             ; preds = %bb9 | 
|  | br i1 undef, label %bb12, label %bb11 | 
|  |  | 
|  | bb11:                                             ; preds = %bb10 | 
|  | unreachable | 
|  |  | 
|  | bb12:                                             ; preds = %bb10, %bb9 | 
|  | br i1 undef, label %bb13, label %bb14 | 
|  |  | 
|  | bb13:                                             ; preds = %bb12 | 
|  | store i8 %0, i8* undef, align 1 | 
|  | %1 = zext i8 %0 to i32                          ; <i32> [#uses=1] | 
|  | br label %bb18 | 
|  |  | 
|  | bb14:                                             ; preds = %bb12 | 
|  | br label %bb18 | 
|  |  | 
|  | bb18:                                             ; preds = %bb14, %bb13 | 
|  | %termcode.0 = phi i32 [ %1, %bb13 ], [ undef, %bb14 ] ; <i32> [#uses=2] | 
|  | %2 = icmp eq i8 %0, 0                           ; <i1> [#uses=1] | 
|  | br i1 %2, label %bb21, label %bb19 | 
|  |  | 
|  | bb19:                                             ; preds = %bb18 | 
|  | br i1 undef, label %bb21, label %bb20 | 
|  |  | 
|  | bb20:                                             ; preds = %bb19 | 
|  | br label %bb21 | 
|  |  | 
|  | bb21:                                             ; preds = %bb20, %bb19, %bb18 | 
|  | %termcode.1 = phi i32 [ %termcode.0, %bb18 ], [ %termcode.0, %bb19 ], [ undef, %bb20 ] ; <i32> [#uses=0] | 
|  | unreachable | 
|  | } |