; LLVM IR from Serpent27/Wyndhim :: src (main)

; 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"

@hex_enc = external dso_local constant [17 x i8], align 16

; 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 void @to_hex(ptr noundef %0, ptr noundef %1, i64 noundef %2) #1 {
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i64, align 8
  %7 = alloca i64, align 8
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  store i64 %2, ptr %6, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #2
  store i64 0, ptr %7, align 8, !tbaa !9
  br label %8

8:                                                ; preds = %45, %3
  %9 = load i64, ptr %7, align 8, !tbaa !9
  %10 = load i64, ptr %6, align 8, !tbaa !9
  %11 = icmp ult i64 %9, %10
  br i1 %11, label %12, label %48

12:                                               ; preds = %8
  %13 = load ptr, ptr %4, align 8, !tbaa !5
  %14 = load i64, ptr %7, align 8, !tbaa !9
  %15 = getelementptr inbounds i8, ptr %13, i64 %14
  %16 = load i8, ptr %15, align 1, !tbaa !11
  %17 = zext i8 %16 to i32
  %18 = sdiv i32 %17, 16
  %19 = sext i32 %18 to i64
  %20 = getelementptr inbounds [17 x i8], ptr @hex_enc, i64 0, i64 %19
  %21 = load i8, ptr %20, align 1, !tbaa !11
  %22 = load ptr, ptr %5, align 8, !tbaa !5
  %23 = load i64, ptr %7, align 8, !tbaa !9
  %24 = mul i64 %23, 2
  %25 = getelementptr inbounds i8, ptr %22, i64 %24
  store i8 %21, ptr %25, align 1, !tbaa !11
  %26 = load ptr, ptr %4, align 8, !tbaa !5
  %27 = load i64, ptr %7, align 8, !tbaa !9
  %28 = getelementptr inbounds i8, ptr %26, i64 %27
  %29 = load i8, ptr %28, align 1, !tbaa !11
  %30 = zext i8 %29 to i32
  %31 = srem i32 %30, 16
  %32 = sext i32 %31 to i64
  %33 = getelementptr inbounds [17 x i8], ptr @hex_enc, i64 0, i64 %32
  %34 = load i8, ptr %33, align 1, !tbaa !11
  %35 = load ptr, ptr %5, align 8, !tbaa !5
  %36 = load i64, ptr %7, align 8, !tbaa !9
  %37 = mul i64 %36, 2
  %38 = add i64 %37, 1
  %39 = getelementptr inbounds i8, ptr %35, i64 %38
  store i8 %34, ptr %39, align 1, !tbaa !11
  %40 = load ptr, ptr %5, align 8, !tbaa !5
  %41 = load i64, ptr %7, align 8, !tbaa !9
  %42 = mul i64 %41, 2
  %43 = add i64 %42, 2
  %44 = getelementptr inbounds i8, ptr %40, i64 %43
  store i8 0, ptr %44, align 1, !tbaa !11
  br label %45

45:                                               ; preds = %12
  %46 = load i64, ptr %7, align 8, !tbaa !9
  %47 = add i64 %46, 1
  store i64 %47, ptr %7, align 8, !tbaa !9
  br label %8, !llvm.loop !12

48:                                               ; preds = %8
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #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 = !{!7, !7, i64 0}
!12 = distinct !{!12, !13}
!13 = !{!"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"

@hex_enc = external dso_local local_unnamed_addr constant [17 x i8], align 16

; Function Attrs: nofree norecurse nosync nounwind memory(argmem: readwrite) uwtable
define dso_local void @to_hex(ptr nocapture noundef readonly %0, ptr nocapture noundef writeonly %1, i64 noundef %2) local_unnamed_addr #0 {
  %.not = icmp eq i64 %2, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %3, %.lr.ph
  %.012 = phi i64 [ %20, %.lr.ph ], [ 0, %3 ]
  %4 = getelementptr inbounds i8, ptr %0, i64 %.012
  %5 = load i8, ptr %4, align 1, !tbaa !5
  %6 = lshr i8 %5, 4
  %7 = zext nneg i8 %6 to i64
  %8 = getelementptr inbounds [17 x i8], ptr @hex_enc, i64 0, i64 %7
  %9 = load i8, ptr %8, align 1, !tbaa !5
  %10 = shl i64 %.012, 1
  %11 = getelementptr inbounds i8, ptr %1, i64 %10
  store i8 %9, ptr %11, align 1, !tbaa !5
  %12 = load i8, ptr %4, align 1, !tbaa !5
  %13 = and i8 %12, 15
  %14 = zext nneg i8 %13 to i64
  %15 = getelementptr inbounds [17 x i8], ptr @hex_enc, i64 0, i64 %14
  %16 = load i8, ptr %15, align 1, !tbaa !5
  %17 = or disjoint i64 %10, 1
  %18 = getelementptr inbounds i8, ptr %1, i64 %17
  store i8 %16, ptr %18, align 1, !tbaa !5
  %19 = getelementptr i8, ptr %11, i64 2
  store i8 0, ptr %19, align 1, !tbaa !5
  %20 = add nuw i64 %.012, 1
  %exitcond.not = icmp eq i64 %20, %2
  br i1 %exitcond.not, label %._crit_edge, label %.lr.ph, !llvm.loop !8

._crit_edge:                                      ; preds = %.lr.ph, %3
  ret void
}

attributes #0 = { 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 = !{!"omnipotent char", !7, i64 0}
!7 = !{!"Simple C/C++ TBAA"}
!8 = distinct !{!8, !9}
!9 = !{!"llvm.loop.mustprogress"}


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