; LLVM IR from Stephane-D/SGDK :: src (maths)

; 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
define dso_local i64 @getApproximatedDistance(i64 noundef %0, i64 noundef %1) #1 {
  %3 = alloca i64, align 8
  %4 = alloca i64, align 8
  %5 = alloca i64, align 8
  %6 = alloca i64, align 8
  store i64 %0, ptr %3, align 8, !tbaa !5
  store i64 %1, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #2
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #2
  %7 = load i64, ptr %3, align 8, !tbaa !5
  %8 = icmp slt i64 %7, 0
  br i1 %8, label %9, label %12

9:                                                ; preds = %2
  %10 = load i64, ptr %3, align 8, !tbaa !5
  %11 = sub nsw i64 0, %10
  store i64 %11, ptr %3, align 8, !tbaa !5
  br label %12

12:                                               ; preds = %9, %2
  %13 = load i64, ptr %4, align 8, !tbaa !5
  %14 = icmp slt i64 %13, 0
  br i1 %14, label %15, label %18

15:                                               ; preds = %12
  %16 = load i64, ptr %4, align 8, !tbaa !5
  %17 = sub nsw i64 0, %16
  store i64 %17, ptr %4, align 8, !tbaa !5
  br label %18

18:                                               ; preds = %15, %12
  %19 = load i64, ptr %3, align 8, !tbaa !5
  %20 = load i64, ptr %4, align 8, !tbaa !5
  %21 = icmp slt i64 %19, %20
  br i1 %21, label %22, label %25

22:                                               ; preds = %18
  %23 = load i64, ptr %3, align 8, !tbaa !5
  store i64 %23, ptr %5, align 8, !tbaa !5
  %24 = load i64, ptr %4, align 8, !tbaa !5
  store i64 %24, ptr %6, align 8, !tbaa !5
  br label %28

25:                                               ; preds = %18
  %26 = load i64, ptr %4, align 8, !tbaa !5
  store i64 %26, ptr %5, align 8, !tbaa !5
  %27 = load i64, ptr %3, align 8, !tbaa !5
  store i64 %27, ptr %6, align 8, !tbaa !5
  br label %28

28:                                               ; preds = %25, %22
  %29 = load i64, ptr %6, align 8, !tbaa !5
  %30 = shl i64 %29, 8
  %31 = load i64, ptr %6, align 8, !tbaa !5
  %32 = shl i64 %31, 3
  %33 = add i64 %30, %32
  %34 = load i64, ptr %6, align 8, !tbaa !5
  %35 = shl i64 %34, 4
  %36 = sub i64 %33, %35
  %37 = load i64, ptr %6, align 8, !tbaa !5
  %38 = shl i64 %37, 1
  %39 = sub i64 %36, %38
  %40 = load i64, ptr %5, align 8, !tbaa !5
  %41 = shl i64 %40, 7
  %42 = add i64 %39, %41
  %43 = load i64, ptr %5, align 8, !tbaa !5
  %44 = shl i64 %43, 5
  %45 = sub i64 %42, %44
  %46 = load i64, ptr %5, align 8, !tbaa !5
  %47 = shl i64 %46, 3
  %48 = add i64 %45, %47
  %49 = load i64, ptr %5, align 8, !tbaa !5
  %50 = shl i64 %49, 1
  %51 = sub i64 %48, %50
  %52 = lshr i64 %51, 8
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #2
  ret i64 %52
}

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 = !{!"long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}


; 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 range(i64 0, 72057594037927936) i64 @getApproximatedDistance(i64 noundef %0, i64 noundef %1) local_unnamed_addr #0 {
  %spec.select = tail call i64 @llvm.abs.i64(i64 %0, i1 true)
  %.019 = tail call i64 @llvm.abs.i64(i64 %1, i1 true)
  %.018 = tail call i64 @llvm.umin.i64(i64 %spec.select, i64 %.019)
  %.0 = tail call i64 @llvm.umax.i64(i64 %spec.select, i64 %.019)
  %3 = mul i64 %.0, 246
  %reass.mul = mul i64 %.018, 102
  %4 = add i64 %reass.mul, %3
  %5 = lshr i64 %4, 8
  ret i64 %5
}

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i64 @llvm.abs.i64(i64, i1 immarg) #1

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i64 @llvm.umin.i64(i64, i64) #1

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i64 @llvm.umax.i64(i64, i64) #1

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" }
attributes #1 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }

!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: GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass