; LLVM IR from hutusi/rethink-c :: src (distance)

; 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"

%struct._Vector = type { ptr, i32 }

; 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 speculatable willreturn memory(none)
declare double @llvm.fabs.f64(double) #1

; 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
define dso_local double @manhattan_distance(ptr noundef %0, ptr noundef %1) #2 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca double, 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) #3
  store double 0.000000e+00, ptr %5, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #3
  store i32 0, ptr %6, align 4, !tbaa !11
  br label %7

7:                                                ; preds = %33, %2
  %8 = load i32, ptr %6, align 4, !tbaa !11
  %9 = load ptr, ptr %3, align 8, !tbaa !5
  %10 = getelementptr inbounds %struct._Vector, ptr %9, i32 0, i32 1
  %11 = load i32, ptr %10, align 8, !tbaa !13
  %12 = icmp ult i32 %8, %11
  br i1 %12, label %14, label %13

13:                                               ; preds = %7
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #3
  br label %36

14:                                               ; preds = %7
  %15 = load ptr, ptr %4, align 8, !tbaa !5
  %16 = getelementptr inbounds %struct._Vector, ptr %15, i32 0, i32 0
  %17 = load ptr, ptr %16, align 8, !tbaa !15
  %18 = load i32, ptr %6, align 4, !tbaa !11
  %19 = sext i32 %18 to i64
  %20 = getelementptr inbounds double, ptr %17, i64 %19
  %21 = load double, ptr %20, align 8, !tbaa !9
  %22 = load ptr, ptr %3, align 8, !tbaa !5
  %23 = getelementptr inbounds %struct._Vector, ptr %22, i32 0, i32 0
  %24 = load ptr, ptr %23, align 8, !tbaa !15
  %25 = load i32, ptr %6, align 4, !tbaa !11
  %26 = sext i32 %25 to i64
  %27 = getelementptr inbounds double, ptr %24, i64 %26
  %28 = load double, ptr %27, align 8, !tbaa !9
  %29 = fsub double %21, %28
  %30 = call double @llvm.fabs.f64(double %29)
  %31 = load double, ptr %5, align 8, !tbaa !9
  %32 = fadd double %31, %30
  store double %32, ptr %5, align 8, !tbaa !9
  br label %33

33:                                               ; preds = %14
  %34 = load i32, ptr %6, align 4, !tbaa !11
  %35 = add nsw i32 %34, 1
  store i32 %35, ptr %6, align 4, !tbaa !11
  br label %7, !llvm.loop !16

36:                                               ; preds = %13
  %37 = load double, ptr %5, align 8, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #3
  ret double %37
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #2 = { 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 #3 = { 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 = !{!"double", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"int", !7, i64 0}
!13 = !{!14, !12, i64 8}
!14 = !{!"_Vector", !6, i64 0, !12, i64 8}
!15 = !{!14, !6, i64 0}
!16 = distinct !{!16, !17}
!17 = !{!"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 nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare double @llvm.fabs.f64(double) #0

; Function Attrs: nofree norecurse nosync nounwind memory(read, inaccessiblemem: none) uwtable
define dso_local double @manhattan_distance(ptr nocapture noundef readonly %0, ptr nocapture noundef readonly %1) local_unnamed_addr #1 {
  %3 = getelementptr inbounds i8, ptr %0, i64 8
  %4 = load i32, ptr %3, align 8, !tbaa !5
  %.not = icmp eq i32 %4, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %2
  %5 = load ptr, ptr %1, align 8, !tbaa !11
  %6 = load ptr, ptr %0, align 8, !tbaa !11
  %wide.trip.count = zext i32 %4 to i64
  %xtraiter = and i64 %wide.trip.count, 1
  %7 = icmp eq i32 %4, 1
  br i1 %7, label %._crit_edge.loopexit.unr-lcssa, label %.lr.ph.new

.lr.ph.new:                                       ; preds = %.lr.ph
  %unroll_iter = and i64 %wide.trip.count, 4294967294
  br label %15

._crit_edge.loopexit.unr-lcssa:                   ; preds = %15, %.lr.ph
  %.lcssa.ph = phi double [ poison, %.lr.ph ], [ %29, %15 ]
  %indvars.iv.unr = phi i64 [ 0, %.lr.ph ], [ %indvars.iv.next.1, %15 ]
  %.089.unr = phi double [ 0.000000e+00, %.lr.ph ], [ %29, %15 ]
  %lcmp.mod.not = icmp eq i64 %xtraiter, 0
  br i1 %lcmp.mod.not, label %._crit_edge, label %._crit_edge.loopexit.epilog-lcssa

._crit_edge.loopexit.epilog-lcssa:                ; preds = %._crit_edge.loopexit.unr-lcssa
  %8 = getelementptr inbounds double, ptr %5, i64 %indvars.iv.unr
  %9 = load double, ptr %8, align 8, !tbaa !12
  %10 = getelementptr inbounds double, ptr %6, i64 %indvars.iv.unr
  %11 = load double, ptr %10, align 8, !tbaa !12
  %12 = fsub double %9, %11
  %13 = tail call double @llvm.fabs.f64(double %12)
  %14 = fadd double %.089.unr, %13
  br label %._crit_edge

._crit_edge:                                      ; preds = %._crit_edge.loopexit.epilog-lcssa, %._crit_edge.loopexit.unr-lcssa, %2
  %.08.lcssa = phi double [ 0.000000e+00, %2 ], [ %.lcssa.ph, %._crit_edge.loopexit.unr-lcssa ], [ %14, %._crit_edge.loopexit.epilog-lcssa ]
  ret double %.08.lcssa

15:                                               ; preds = %15, %.lr.ph.new
  %indvars.iv = phi i64 [ 0, %.lr.ph.new ], [ %indvars.iv.next.1, %15 ]
  %.089 = phi double [ 0.000000e+00, %.lr.ph.new ], [ %29, %15 ]
  %niter = phi i64 [ 0, %.lr.ph.new ], [ %niter.next.1, %15 ]
  %16 = getelementptr inbounds double, ptr %5, i64 %indvars.iv
  %17 = load double, ptr %16, align 8, !tbaa !12
  %18 = getelementptr inbounds double, ptr %6, i64 %indvars.iv
  %19 = load double, ptr %18, align 8, !tbaa !12
  %20 = fsub double %17, %19
  %21 = tail call double @llvm.fabs.f64(double %20)
  %22 = fadd double %.089, %21
  %indvars.iv.next = or disjoint i64 %indvars.iv, 1
  %23 = getelementptr inbounds double, ptr %5, i64 %indvars.iv.next
  %24 = load double, ptr %23, align 8, !tbaa !12
  %25 = getelementptr inbounds double, ptr %6, i64 %indvars.iv.next
  %26 = load double, ptr %25, align 8, !tbaa !12
  %27 = fsub double %24, %26
  %28 = tail call double @llvm.fabs.f64(double %27)
  %29 = fadd double %22, %28
  %indvars.iv.next.1 = add nuw nsw i64 %indvars.iv, 2
  %niter.next.1 = add i64 %niter, 2
  %niter.ncmp.1 = icmp eq i64 %niter.next.1, %unroll_iter
  br i1 %niter.ncmp.1, label %._crit_edge.loopexit.unr-lcssa, label %15, !llvm.loop !14
}

attributes #0 = { mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #1 = { nofree norecurse nosync nounwind memory(read, inaccessiblemem: 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)"}
!5 = !{!6, !10, i64 8}
!6 = !{!"_Vector", !7, i64 0, !10, i64 8}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"int", !8, i64 0}
!11 = !{!6, !7, i64 0}
!12 = !{!13, !13, i64 0}
!13 = !{!"double", !8, i64 0}
!14 = distinct !{!14, !15}
!15 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass