; LLVM IR from kobalicek/simdtests :: dejpeg/dejpeg_ref.ll (Z19dejpeg_dezigzag_refPsPKs)

; 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"

@_ZL21dejpeg_dezigzag_table = external hidden constant [64 x i8], align 16

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_Z19dejpeg_dezigzag_refPsPKs(ptr noundef %0, ptr noundef %1) #0 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #2
  store ptr @_ZL21dejpeg_dezigzag_table, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #2
  store i32 0, ptr %6, align 4, !tbaa !9
  br label %7

7:                                                ; preds = %25, %2
  %8 = load i32, ptr %6, align 4, !tbaa !9
  %9 = icmp ult i32 %8, 64
  br i1 %9, label %11, label %10

10:                                               ; preds = %7
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  br label %28

11:                                               ; preds = %7
  %12 = load ptr, ptr %4, align 8, !tbaa !5
  %13 = load i32, ptr %6, align 4, !tbaa !9
  %14 = zext i32 %13 to i64
  %15 = getelementptr inbounds i16, ptr %12, i64 %14
  %16 = load i16, ptr %15, align 2, !tbaa !11
  %17 = load ptr, ptr %3, align 8, !tbaa !5
  %18 = load ptr, ptr %5, align 8, !tbaa !5
  %19 = load i32, ptr %6, align 4, !tbaa !9
  %20 = zext i32 %19 to i64
  %21 = getelementptr inbounds i8, ptr %18, i64 %20
  %22 = load i8, ptr %21, align 1, !tbaa !13
  %23 = zext i8 %22 to i64
  %24 = getelementptr inbounds i16, ptr %17, i64 %23
  store i16 %16, ptr %24, align 2, !tbaa !11
  br label %25

25:                                               ; preds = %11
  %26 = load i32, ptr %6, align 4, !tbaa !9
  %27 = add i32 %26, 1
  store i32 %27, ptr %6, align 4, !tbaa !9
  br label %7, !llvm.loop !14

28:                                               ; preds = %10
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #2
  ret void
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

attributes #0 = { 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 #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = !{!12, !12, i64 0}
!12 = !{!"short", !7, i64 0}
!13 = !{!7, !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"

@_ZL21dejpeg_dezigzag_table = external hidden local_unnamed_addr constant [64 x i8], align 16

; Function Attrs: mustprogress nofree norecurse nosync nounwind memory(argmem: readwrite) uwtable
define dso_local void @_Z19dejpeg_dezigzag_refPsPKs(ptr nocapture noundef writeonly %0, ptr nocapture noundef readonly %1) local_unnamed_addr #0 {
  br label %4

3:                                                ; preds = %4
  ret void

4:                                                ; preds = %4, %2
  %indvars.iv = phi i64 [ 0, %2 ], [ %indvars.iv.next.3, %4 ]
  %5 = getelementptr inbounds i16, ptr %1, i64 %indvars.iv
  %6 = load i16, ptr %5, align 2, !tbaa !5
  %7 = getelementptr inbounds i8, ptr @_ZL21dejpeg_dezigzag_table, i64 %indvars.iv
  %8 = load i8, ptr %7, align 4, !tbaa !9
  %9 = zext i8 %8 to i64
  %10 = getelementptr inbounds i16, ptr %0, i64 %9
  store i16 %6, ptr %10, align 2, !tbaa !5
  %indvars.iv.next = or disjoint i64 %indvars.iv, 1
  %11 = getelementptr inbounds i16, ptr %1, i64 %indvars.iv.next
  %12 = load i16, ptr %11, align 2, !tbaa !5
  %13 = getelementptr inbounds i8, ptr @_ZL21dejpeg_dezigzag_table, i64 %indvars.iv.next
  %14 = load i8, ptr %13, align 1, !tbaa !9
  %15 = zext i8 %14 to i64
  %16 = getelementptr inbounds i16, ptr %0, i64 %15
  store i16 %12, ptr %16, align 2, !tbaa !5
  %indvars.iv.next.1 = or disjoint i64 %indvars.iv, 2
  %17 = getelementptr inbounds i16, ptr %1, i64 %indvars.iv.next.1
  %18 = load i16, ptr %17, align 2, !tbaa !5
  %19 = getelementptr inbounds i8, ptr @_ZL21dejpeg_dezigzag_table, i64 %indvars.iv.next.1
  %20 = load i8, ptr %19, align 2, !tbaa !9
  %21 = zext i8 %20 to i64
  %22 = getelementptr inbounds i16, ptr %0, i64 %21
  store i16 %18, ptr %22, align 2, !tbaa !5
  %indvars.iv.next.2 = or disjoint i64 %indvars.iv, 3
  %23 = getelementptr inbounds i16, ptr %1, i64 %indvars.iv.next.2
  %24 = load i16, ptr %23, align 2, !tbaa !5
  %25 = getelementptr inbounds i8, ptr @_ZL21dejpeg_dezigzag_table, i64 %indvars.iv.next.2
  %26 = load i8, ptr %25, align 1, !tbaa !9
  %27 = zext i8 %26 to i64
  %28 = getelementptr inbounds i16, ptr %0, i64 %27
  store i16 %24, ptr %28, align 2, !tbaa !5
  %indvars.iv.next.3 = add nuw nsw i64 %indvars.iv, 4
  %exitcond.not.3 = icmp eq i64 %indvars.iv.next.3, 64
  br i1 %exitcond.not.3, label %3, label %4, !llvm.loop !10
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind memory(argmem: readwrite) 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)"}
!5 = !{!6, !6, i64 0}
!6 = !{!"short", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!7, !7, i64 0}
!10 = distinct !{!10, !11}
!11 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferAlignmentPass,InferFunctionAttrsPass,InstCombinePass,LoopRotatePass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass