; LLVM IR from mkazhdan/DMG :: Util/TIFF (tif_swab)

; 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: nounwind uwtable
declare dso_local void @TIFFSwabArrayOfLong(ptr noundef, i64 noundef) #1

; Function Attrs: nounwind uwtable
define dso_local void @TIFFSwabArrayOfDouble(ptr noundef %0, i64 noundef %1) #1 {
  %3 = alloca ptr, align 8
  %4 = alloca i64, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i64 %1, ptr %4, align 8, !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 4, ptr %6) #2
  %8 = load ptr, ptr %5, align 8, !tbaa !5
  %9 = load i64, ptr %4, align 8, !tbaa !9
  %10 = load i64, ptr %4, align 8, !tbaa !9
  %11 = add i64 %9, %10
  call void @TIFFSwabArrayOfLong(ptr noundef %8, i64 noundef %11)
  br label %12

12:                                               ; preds = %16, %2
  %13 = load i64, ptr %4, align 8, !tbaa !9
  %14 = add i64 %13, -1
  store i64 %14, ptr %4, align 8, !tbaa !9
  %15 = icmp ugt i64 %13, 0
  br i1 %15, label %16, label %30

16:                                               ; preds = %12
  %17 = load ptr, ptr %5, align 8, !tbaa !5
  %18 = getelementptr inbounds i32, ptr %17, i64 0
  %19 = load i32, ptr %18, align 4, !tbaa !11
  store i32 %19, ptr %6, align 4, !tbaa !11
  %20 = load ptr, ptr %5, align 8, !tbaa !5
  %21 = getelementptr inbounds i32, ptr %20, i64 1
  %22 = load i32, ptr %21, align 4, !tbaa !11
  %23 = load ptr, ptr %5, align 8, !tbaa !5
  %24 = getelementptr inbounds i32, ptr %23, i64 0
  store i32 %22, ptr %24, align 4, !tbaa !11
  %25 = load i32, ptr %6, align 4, !tbaa !11
  %26 = load ptr, ptr %5, align 8, !tbaa !5
  %27 = getelementptr inbounds i32, ptr %26, i64 1
  store i32 %25, ptr %27, align 4, !tbaa !11
  %28 = load ptr, ptr %5, align 8, !tbaa !5
  %29 = getelementptr inbounds i32, ptr %28, i64 2
  store ptr %29, ptr %5, align 8, !tbaa !5
  br label %12, !llvm.loop !13

30:                                               ; preds = %12
  call void @llvm.lifetime.end.p0(i64 4, 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 = { 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/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"long", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"int", !7, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"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: nounwind uwtable
declare dso_local void @TIFFSwabArrayOfLong(ptr noundef, i64 noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local void @TIFFSwabArrayOfDouble(ptr noundef %0, i64 noundef %1) local_unnamed_addr #0 {
  %3 = shl i64 %1, 1
  tail call void @TIFFSwabArrayOfLong(ptr noundef %0, i64 noundef %3)
  %.not11 = icmp eq i64 %1, 0
  br i1 %.not11, label %._crit_edge, label %.lr.ph.preheader

.lr.ph.preheader:                                 ; preds = %2
  %min.iters.check = icmp ult i64 %1, 4
  br i1 %min.iters.check, label %.lr.ph.preheader22, label %vector.ph

vector.ph:                                        ; preds = %.lr.ph.preheader
  %n.vec = and i64 %1, -4
  %ind.end = and i64 %1, 3
  %4 = shl i64 %n.vec, 3
  %ind.end14 = getelementptr i8, ptr %0, i64 %4
  br label %vector.body

vector.body:                                      ; preds = %vector.body, %vector.ph
  %index = phi i64 [ 0, %vector.ph ], [ %index.next, %vector.body ]
  %offset.idx = shl i64 %index, 3
  %5 = or disjoint i64 %offset.idx, 16
  %next.gep = getelementptr i8, ptr %0, i64 %offset.idx
  %next.gep16 = getelementptr i8, ptr %0, i64 %5
  %wide.vec = load <4 x i32>, ptr %next.gep, align 4, !tbaa !5
  %wide.vec17 = load <4 x i32>, ptr %next.gep16, align 4, !tbaa !5
  %interleaved.vec = shufflevector <4 x i32> %wide.vec, <4 x i32> poison, <4 x i32> <i32 1, i32 0, i32 3, i32 2>
  store <4 x i32> %interleaved.vec, ptr %next.gep, align 4, !tbaa !5
  %interleaved.vec21 = shufflevector <4 x i32> %wide.vec17, <4 x i32> poison, <4 x i32> <i32 1, i32 0, i32 3, i32 2>
  store <4 x i32> %interleaved.vec21, ptr %next.gep16, align 4, !tbaa !5
  %index.next = add nuw i64 %index, 4
  %6 = icmp eq i64 %index.next, %n.vec
  br i1 %6, label %middle.block, label %vector.body, !llvm.loop !9

middle.block:                                     ; preds = %vector.body
  %cmp.n = icmp eq i64 %n.vec, %1
  br i1 %cmp.n, label %._crit_edge, label %.lr.ph.preheader22

.lr.ph.preheader22:                               ; preds = %middle.block, %.lr.ph.preheader
  %.013.ph = phi i64 [ %1, %.lr.ph.preheader ], [ %ind.end, %middle.block ]
  %.01012.ph = phi ptr [ %0, %.lr.ph.preheader ], [ %ind.end14, %middle.block ]
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.preheader22, %.lr.ph
  %.013 = phi i64 [ %7, %.lr.ph ], [ %.013.ph, %.lr.ph.preheader22 ]
  %.01012 = phi ptr [ %10, %.lr.ph ], [ %.01012.ph, %.lr.ph.preheader22 ]
  %7 = add i64 %.013, -1
  %8 = load <2 x i32>, ptr %.01012, align 4, !tbaa !5
  %9 = shufflevector <2 x i32> %8, <2 x i32> poison, <2 x i32> <i32 1, i32 0>
  store <2 x i32> %9, ptr %.01012, align 4, !tbaa !5
  %10 = getelementptr inbounds i8, ptr %.01012, i64 8
  %.not = icmp eq i64 %7, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !13

._crit_edge:                                      ; preds = %.lr.ph, %middle.block, %2
  ret void
}

attributes #0 = { 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" }

!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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = distinct !{!9, !10, !11, !12}
!10 = !{!"llvm.loop.mustprogress"}
!11 = !{!"llvm.loop.isvectorized", i32 1}
!12 = !{!"llvm.loop.unroll.runtime.disable"}
!13 = distinct !{!13, !10, !12, !11}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopLoadEliminationPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,LoopVectorizePass,SLPVectorizerPass,SROAPass,SimplifyCFGPass,TailCallElimPass,VectorCombinePass