1; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 2 2; RUN: llc -mcpu=cyclone < %s | FileCheck %s 3target datalayout = "e-i64:64-n32:64-S128" 4target triple = "arm64-apple-ios" 5 6%"struct.SU" = type { i32, ptr, ptr, i32, i32, %"struct.BO", i32, [5 x i8] } 7%"struct.BO" = type { %"struct.RE" } 8 9%"struct.RE" = type { i32, i32, i32, i32 } 10 11; This is a read-modify-write of some bifields combined into an i48. It gets 12; legalized into i32 and i16 accesses. Only a single store of zero to the low 13; i32 part should be live. 14define void @test(ptr nocapture %su) { 15; CHECK-LABEL: test: 16; CHECK: ; %bb.0: ; %entry 17; CHECK-NEXT: str wzr, [x0, #96] 18; CHECK-NEXT: ret 19entry: 20 %r1 = getelementptr inbounds %"struct.SU", ptr %su, i64 1, i32 5 21 %r3 = load i48, ptr %r1, align 8 22 %r4 = and i48 %r3, -4294967296 23 %r5 = or i48 0, %r4 24 store i48 %r5, ptr %r1, align 8 25 26 ret void 27} 28