1; RUN: llc < %s -mtriple=s390x-redhat-linux | FileCheck %s 2; 3; Triggers a path in SelectionDAG's UpdateChains where a node is 4; deleted but we try to read it later (pr31710), invoking UB in 5; release mode or hitting an assert if they're enabled. 6 7; CHECK: btldata: 8define void @btldata(ptr %u0, ptr %p0, ptr %p1, ptr %p3, ptr %p5, ptr %p7) { 9entry: 10 %x0 = load ptr, ptr %p0, align 8, !tbaa !0 11 store i64 0, ptr %u0, align 8, !tbaa !4 12 %x1 = load ptr, ptr %p1, align 8, !tbaa !0 13 %x2 = load i32, ptr %x1, align 4, !tbaa !6 14 %x2ext = sext i32 %x2 to i64 15 store i32 %x2, ptr %x1, align 4, !tbaa !6 16 %x3 = load ptr, ptr %p3, align 8, !tbaa !0 17 %ptr = getelementptr inbounds i32, ptr %x3, i64 %x2ext 18 %x4 = load i32, ptr %ptr, align 4, !tbaa !6 19 %x4inc = add nsw i32 %x4, 1 20 store i32 %x4inc, ptr %ptr, align 4, !tbaa !6 21 store i64 undef, ptr %u0, align 8, !tbaa !4 22 %x5 = load ptr, ptr %p5, align 8, !tbaa !0 23 %x6 = load i32, ptr %x5, align 4, !tbaa !6 24 store i32 %x6, ptr %x5, align 4, !tbaa !6 25 %x7 = load ptr, ptr %p7, align 8, !tbaa !0 26 %x8 = load i32, ptr %x7, align 4, !tbaa !6 27 %x8inc = add nsw i32 %x8, 1 28 store i32 %x8inc, ptr %x7, align 4, !tbaa !6 29 ret void 30} 31 32!0 = !{!1, !1, i64 0} 33!1 = !{!"any pointer", !2, i64 0} 34!2 = !{!"omnipotent char", !3, i64 0} 35!3 = !{!"Simple C/C++ TBAA"} 36!4 = !{!5, !5, i64 0} 37!5 = !{!"long", !2, i64 0} 38!6 = !{!7, !7, i64 0} 39!7 = !{!"int", !2, i64 0} 40