1; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py 2; RUN: llc < %s -mtriple=s390x-linux-gnu -pre-RA-sched=list-ilp -disable-sched-live-uses=false | FileCheck %s 3 4target datalayout = "E-m:e-i1:8:16-i8:8:16-i64:64-f128:64-v128:64-a:8:16-n32:64" 5 6%struct.a = type { i16, i32 } 7 8@e = dso_local global %struct.a { i16 9, i32 0 }, align 8 9@f = dso_local local_unnamed_addr global ptr @e, align 8 10@d = dso_local local_unnamed_addr global i32 0, align 4 11 12; This shows a miscompile caused by merging truncated 13; stores if the store of 0 (sthrl) to 'e' happens before 14; a 64-bit store (stg) of r0. The store of r0 can follow 15; the store to 'e' only if it is a 32-bit store (st). 16 17define signext i32 @main() { 18; CHECK-LABEL: main: 19; CHECK: # %bb.0: 20; CHECK-NEXT: lgrl %r0, e 21; CHECK-NEXT: lgrl %r1, f 22; CHECK-NEXT: srlg %r2, %r0, 32 23; CHECK-NEXT: st %r2, 0(%r1) 24; CHECK-NEXT: lhi %r2, 0 25; CHECK-NEXT: sthrl %r2, e 26; CHECK-NEXT: st %r0, 4(%r1) 27; CHECK-NEXT: lghi %r2, 0 28; CHECK-NEXT: strl %r0, d 29; CHECK-NEXT: br %r14 30 %e = load i64, ptr @e, align 8 31 %esh = lshr i64 %e, 32 32 %ehi = trunc i64 %esh to i32 33 %elo = trunc i64 %e to i32 34 %t1 = load ptr, ptr @f, align 8 35 store i32 %ehi, ptr %t1, align 4 36 %f4 = getelementptr inbounds i8, ptr %t1, i64 4 37 store i32 %elo, ptr %f4, align 4 38 store i16 0, ptr @e, align 8 39 store i32 %elo, ptr @d, align 4 40 ret i32 0 41} 42