| ; RUN: opt < %s -indvars | |
| ; PR4436 | |
| 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" | |
| target triple = "i386-pc-linux-gnu" | |
| define i8* @string_expandtabs(i32 %n, i8* %m) nounwind { | |
| entry: | |
| br i1 undef, label %bb33, label %bb1 | |
| bb1: ; preds = %entry | |
| br i1 undef, label %overflow1, label %bb15 | |
| bb15: ; preds = %bb1 | |
| br i1 undef, label %bb33, label %bb17 | |
| bb17: ; preds = %bb15 | |
| br label %bb30 | |
| bb19: ; preds = %bb30 | |
| br i1 undef, label %bb20, label %bb29 | |
| bb20: ; preds = %bb19 | |
| %0 = load i32, i32* undef, align 4 ; <i32> [#uses=1] | |
| %1 = sub i32 %0, %n ; <i32> [#uses=1] | |
| br label %bb23 | |
| bb21: ; preds = %bb23 | |
| %2 = icmp ult i8* %q.0, %m ; <i1> [#uses=1] | |
| br i1 %2, label %bb22, label %overflow2 | |
| bb22: ; preds = %bb21 | |
| %3 = getelementptr i8, i8* %q.0, i32 1 ; <i8*> [#uses=1] | |
| br label %bb23 | |
| bb23: ; preds = %bb22, %bb20 | |
| %i.2 = phi i32 [ %1, %bb20 ], [ %4, %bb22 ] ; <i32> [#uses=1] | |
| %q.0 = phi i8* [ undef, %bb20 ], [ %3, %bb22 ] ; <i8*> [#uses=3] | |
| %4 = add i32 %i.2, -1 ; <i32> [#uses=2] | |
| %5 = icmp eq i32 %4, -1 ; <i1> [#uses=1] | |
| br i1 %5, label %bb29, label %bb21 | |
| bb29: ; preds = %bb23, %bb19 | |
| %q.1 = phi i8* [ undef, %bb19 ], [ %q.0, %bb23 ] ; <i8*> [#uses=0] | |
| br label %bb30 | |
| bb30: ; preds = %bb29, %bb17 | |
| br i1 undef, label %bb19, label %bb33 | |
| overflow2: ; preds = %bb21 | |
| br i1 undef, label %bb32, label %overflow1 | |
| bb32: ; preds = %overflow2 | |
| br label %overflow1 | |
| overflow1: ; preds = %bb32, %overflow2, %bb1 | |
| ret i8* null | |
| bb33: ; preds = %bb30, %bb15, %entry | |
| ret i8* undef | |
| } |