1 ; RUN: llc -mcpu=cyclone < %s | FileCheck %s 2 target datalayout = "e-i64:64-n32:64-S128" 3 target triple = "arm64-apple-ios" 4 5 %"struct.SU" = type { i32, %"struct.SU"*, i32*, i32, i32, %"struct.BO", i32, [5 x i8] } 6 %"struct.BO" = type { %"struct.RE" } 7 8 %"struct.RE" = type { i32, i32, i32, i32 } 9 10 ; This is a read-modify-write of some bifields combined into an i48. It gets 11 ; legalized into i32 and i16 accesses. Only a single store of zero to the low 12 ; i32 part should be live. 13 14 ; CHECK-LABEL: test: 15 ; CHECK-NOT: ldr 16 ; CHECK: str wzr 17 ; CHECK-NOT: str 18 define void @test(%"struct.SU"* nocapture %su) { 19 entry: 20 %r1 = getelementptr inbounds %"struct.SU", %"struct.SU"* %su, i64 1, i32 5 21 %r2 = bitcast %"struct.BO"* %r1 to i48* 22 %r3 = load i48, i48* %r2, align 8 23 %r4 = and i48 %r3, -4294967296 24 %r5 = or i48 0, %r4 25 store i48 %r5, i48* %r2, align 8 26 27 ret void 28 } 29
