File: arm64-dagcombiner-dead-indexed-load.ll

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llvm-toolchain-19 1%3A19.1.7-3
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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 2
; RUN: llc -mcpu=cyclone < %s | FileCheck %s
target datalayout = "e-i64:64-n32:64-S128"
target triple = "arm64-apple-ios"

%"struct.SU" = type { i32, ptr, ptr, i32, i32, %"struct.BO", i32, [5 x i8] }
%"struct.BO" = type { %"struct.RE" }

%"struct.RE" = type { i32, i32, i32, i32 }

; This is a read-modify-write of some bifields combined into an i48.  It gets
; legalized into i32 and i16 accesses.  Only a single store of zero to the low
; i32 part should be live.
define void @test(ptr nocapture %su) {
; CHECK-LABEL: test:
; CHECK:       ; %bb.0: ; %entry
; CHECK-NEXT:    str wzr, [x0, #96]
; CHECK-NEXT:    ret
entry:
  %r1 = getelementptr inbounds %"struct.SU", ptr %su, i64 1, i32 5
  %r3 = load i48, ptr %r1, align 8
  %r4 = and i48 %r3, -4294967296
  %r5 = or i48 0, %r4
  store i48 %r5, ptr %r1, align 8

  ret void
}