1 ; RUN: opt < %s -indvars 2 ; PR4436 3 4 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-f80:32:32" 5 target triple = "i386-pc-linux-gnu" 6 7 define i8* @string_expandtabs(i32 %n, i8* %m) nounwind { 8 entry: 9 br i1 undef, label %bb33, label %bb1 10 11 bb1: ; preds = %entry 12 br i1 undef, label %overflow1, label %bb15 13 14 bb15: ; preds = %bb1 15 br i1 undef, label %bb33, label %bb17 16 17 bb17: ; preds = %bb15 18 br label %bb30 19 20 bb19: ; preds = %bb30 21 br i1 undef, label %bb20, label %bb29 22 23 bb20: ; preds = %bb19 24 %0 = load i32* undef, align 4 ; <i32> [#uses=1] 25 %1 = sub i32 %0, %n ; <i32> [#uses=1] 26 br label %bb23 27 28 bb21: ; preds = %bb23 29 %2 = icmp ult i8* %q.0, %m ; <i1> [#uses=1] 30 br i1 %2, label %bb22, label %overflow2 31 32 bb22: ; preds = %bb21 33 %3 = getelementptr i8* %q.0, i32 1 ; <i8*> [#uses=1] 34 br label %bb23 35 36 bb23: ; preds = %bb22, %bb20 37 %i.2 = phi i32 [ %1, %bb20 ], [ %4, %bb22 ] ; <i32> [#uses=1] 38 %q.0 = phi i8* [ undef, %bb20 ], [ %3, %bb22 ] ; <i8*> [#uses=3] 39 %4 = add i32 %i.2, -1 ; <i32> [#uses=2] 40 %5 = icmp eq i32 %4, -1 ; <i1> [#uses=1] 41 br i1 %5, label %bb29, label %bb21 42 43 bb29: ; preds = %bb23, %bb19 44 %q.1 = phi i8* [ undef, %bb19 ], [ %q.0, %bb23 ] ; <i8*> [#uses=0] 45 br label %bb30 46 47 bb30: ; preds = %bb29, %bb17 48 br i1 undef, label %bb19, label %bb33 49 50 overflow2: ; preds = %bb21 51 br i1 undef, label %bb32, label %overflow1 52 53 bb32: ; preds = %overflow2 54 br label %overflow1 55 56 overflow1: ; preds = %bb32, %overflow2, %bb1 57 ret i8* null 58 59 bb33: ; preds = %bb30, %bb15, %entry 60 ret i8* undef 61 } 62
