1 ; RUN: opt -simplifycfg < %s -S | FileCheck %s 2 3 ; The dead code would cause a select that had itself 4 ; as an operand to be analyzed. This would then cause 5 ; infinite recursion and eventual crash. 6 7 define void @PR36045(i1 %t, i32* %b) { 8 ; CHECK-LABEL: @PR36045( 9 ; CHECK-NEXT: entry: 10 ; CHECK-NEXT: ret void 11 ; 12 entry: 13 br i1 %t, label %if, label %end 14 15 if: 16 br i1 %t, label %unreach, label %pre 17 18 unreach: 19 unreachable 20 21 pre: 22 %p = phi i32 [ 70, %if ], [ %sel, %for ] 23 br label %for 24 25 for: 26 %cmp = icmp sgt i32 %p, 8 27 %add = add i32 %p, 2 28 %sel = select i1 %cmp, i32 %p, i32 %add 29 %cmp21 = icmp ult i32 %sel, 21 30 br i1 %cmp21, label %pre, label %for.end 31 32 for.end: 33 br i1 %t, label %unreach2, label %then12 34 35 then12: 36 store i32 0, i32* %b 37 br label %unreach2 38 39 unreach2: 40 %spec = phi i32 [ %sel, %for.end ], [ 42, %then12 ] 41 unreachable 42 43 end: 44 ret void 45 } 46 47
