; 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"

; 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 zeroext i8 @hex_to_int(i8 noundef zeroext) #1

; Function Attrs: nounwind uwtable
define dso_local void @from_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 = %40, %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 %43

12:                                               ; preds = %8
  %13 = load ptr, ptr %4, align 8, !tbaa !5
  %14 = load i64, ptr %7, align 8, !tbaa !9
  %15 = mul i64 %14, 2
  %16 = getelementptr inbounds i8, ptr %13, i64 %15
  %17 = load i8, ptr %16, align 1, !tbaa !11
  %18 = call zeroext i8 @hex_to_int(i8 noundef zeroext %17)
  %19 = zext i8 %18 to i32
  %20 = mul nsw i32 %19, 16
  %21 = trunc i32 %20 to i8
  %22 = load ptr, ptr %5, align 8, !tbaa !5
  %23 = load i64, ptr %7, align 8, !tbaa !9
  %24 = getelementptr inbounds i8, ptr %22, i64 %23
  store i8 %21, ptr %24, align 1, !tbaa !11
  %25 = load ptr, ptr %4, align 8, !tbaa !5
  %26 = load i64, ptr %7, align 8, !tbaa !9
  %27 = mul i64 %26, 2
  %28 = add i64 %27, 1
  %29 = getelementptr inbounds i8, ptr %25, i64 %28
  %30 = load i8, ptr %29, align 1, !tbaa !11
  %31 = call zeroext i8 @hex_to_int(i8 noundef zeroext %30)
  %32 = zext i8 %31 to i32
  %33 = load ptr, ptr %5, align 8, !tbaa !5
  %34 = load i64, ptr %7, align 8, !tbaa !9
  %35 = getelementptr inbounds i8, ptr %33, i64 %34
  %36 = load i8, ptr %35, align 1, !tbaa !11
  %37 = zext i8 %36 to i32
  %38 = add nsw i32 %37, %32
  %39 = trunc i32 %38 to i8
  store i8 %39, ptr %35, align 1, !tbaa !11
  br label %40

40:                                               ; preds = %12
  %41 = load i64, ptr %7, align 8, !tbaa !9
  %42 = add i64 %41, 1
  store i64 %42, ptr %7, align 8, !tbaa !9
  br label %8, !llvm.loop !12

43:                                               ; 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"

; Function Attrs: nounwind uwtable
declare dso_local zeroext i8 @hex_to_int(i8 noundef zeroext) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local void @from_hex(ptr nocapture noundef readonly %0, ptr nocapture noundef %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
  %.010 = phi i64 [ %16, %.lr.ph ], [ 0, %3 ]
  %4 = shl i64 %.010, 1
  %5 = getelementptr inbounds i8, ptr %0, i64 %4
  %6 = load i8, ptr %5, align 1, !tbaa !5
  %7 = tail call zeroext i8 @hex_to_int(i8 noundef zeroext %6)
  %8 = shl i8 %7, 4
  %9 = getelementptr inbounds i8, ptr %1, i64 %.010
  store i8 %8, ptr %9, align 1, !tbaa !5
  %10 = or disjoint i64 %4, 1
  %11 = getelementptr inbounds i8, ptr %0, i64 %10
  %12 = load i8, ptr %11, align 1, !tbaa !5
  %13 = tail call zeroext i8 @hex_to_int(i8 noundef zeroext %12)
  %14 = load i8, ptr %9, align 1, !tbaa !5
  %15 = add i8 %14, %13
  store i8 %15, ptr %9, align 1, !tbaa !5
  %16 = add nuw i64 %.010, 1
  %exitcond.not = icmp eq i64 %16, %2
  br i1 %exitcond.not, label %._crit_edge, label %.lr.ph, !llvm.loop !8

._crit_edge:                                      ; preds = %.lr.ph, %3
  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 = !{!"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,TailCallElimPass