; LLVM IR from aap/librw :: src/base.ll (ZN2rw16memNative16_funcEPvj)

; Unoptimized IR (clang -disable-llvm-passes):
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_ZN2rw16memNative16_funcEPvj(ptr noundef %0, i32 noundef %1) #1 {
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #2
  %7 = load ptr, ptr %3, align 8, !tbaa !5
  store ptr %7, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #2
  %8 = load ptr, ptr %3, align 8, !tbaa !5
  store ptr %8, ptr %6, align 8, !tbaa !5
  %9 = load i32, ptr %4, align 4, !tbaa !9
  %10 = lshr i32 %9, 1
  store i32 %10, ptr %4, align 4, !tbaa !9
  br label %11

11:                                               ; preds = %15, %2
  %12 = load i32, ptr %4, align 4, !tbaa !9
  %13 = add i32 %12, -1
  store i32 %13, ptr %4, align 4, !tbaa !9
  %14 = icmp ne i32 %12, 0
  br i1 %14, label %15, label %33

15:                                               ; preds = %11
  %16 = load ptr, ptr %5, align 8, !tbaa !5
  %17 = getelementptr inbounds i8, ptr %16, i64 0
  %18 = load i8, ptr %17, align 1, !tbaa !11
  %19 = zext i8 %18 to i16
  %20 = zext i16 %19 to i32
  %21 = load ptr, ptr %5, align 8, !tbaa !5
  %22 = getelementptr inbounds i8, ptr %21, i64 1
  %23 = load i8, ptr %22, align 1, !tbaa !11
  %24 = zext i8 %23 to i16
  %25 = zext i16 %24 to i32
  %26 = shl i32 %25, 8
  %27 = or i32 %20, %26
  %28 = trunc i32 %27 to i16
  %29 = load ptr, ptr %6, align 8, !tbaa !5
  %30 = getelementptr inbounds i16, ptr %29, i32 1
  store ptr %30, ptr %6, align 8, !tbaa !5
  store i16 %28, ptr %29, align 2, !tbaa !12
  %31 = load ptr, ptr %5, align 8, !tbaa !5
  %32 = getelementptr inbounds i8, ptr %31, i64 2
  store ptr %32, ptr %5, align 8, !tbaa !5
  br label %11, !llvm.loop !14

33:                                               ; preds = %11
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #2
  ret void
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { mustprogress nounwind uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #2 = { nounwind }

!llvm.module.flags = !{!0, !1, !2, !3}
!llvm.ident = !{!4}

!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{i32 8, !"PIC Level", i32 2}
!2 = !{i32 7, !"PIE Level", i32 2}
!3 = !{i32 7, !"uwtable", i32 2}
!4 = !{!"clang version 19.1.0 (git@github.com:llvm/llvm-project.git a4bf6cd7cfb1a1421ba92bca9d017b49936c55e4)"}
!5 = !{!6, !6, i64 0}
!6 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!7, !7, i64 0}
!12 = !{!13, !13, i64 0}
!13 = !{!"short", !7, i64 0}
!14 = distinct !{!14, !15}
!15 = !{!"llvm.loop.mustprogress"}


; Optimized IR (opt -passes='default<O3>'):
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(none) uwtable
define dso_local void @_ZN2rw16memNative16_funcEPvj(ptr nocapture noundef %0, i32 noundef %1) local_unnamed_addr #0 {
._crit_edge:
  ret void
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(none) uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }

!llvm.module.flags = !{!0, !1, !2, !3}
!llvm.ident = !{!4}

!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{i32 8, !"PIC Level", i32 2}
!2 = !{i32 7, !"PIE Level", i32 2}
!3 = !{i32 7, !"uwtable", i32 2}
!4 = !{!"clang version 19.1.0 (git@github.com:llvm/llvm-project.git a4bf6cd7cfb1a1421ba92bca9d017b49936c55e4)"}


; Effective O3 passes: AggressiveInstCombinePass,EarlyCSEPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass