; LLVM IR from LoupVaillant/Monocypher-Utils :: src (utils)

; 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 i32 @int_of_string(ptr noundef %0) #1 {
  %2 = alloca i32, align 4
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #2
  store i32 0, ptr %4, align 4, !tbaa !9
  %6 = load ptr, ptr %3, align 8, !tbaa !5
  %7 = icmp eq ptr %6, null
  br i1 %7, label %8, label %9

8:                                                ; preds = %1
  store i32 -1, ptr %2, align 4
  store i32 1, ptr %5, align 4
  br label %47

9:                                                ; preds = %1
  %10 = load ptr, ptr %3, align 8, !tbaa !5
  %11 = load i8, ptr %10, align 1, !tbaa !11
  %12 = sext i8 %11 to i32
  %13 = icmp eq i32 %12, 0
  br i1 %13, label %14, label %15

14:                                               ; preds = %9
  store i32 -2, ptr %2, align 4
  store i32 1, ptr %5, align 4
  br label %47

15:                                               ; preds = %9
  br label %16

16:                                               ; preds = %36, %15
  %17 = load ptr, ptr %3, align 8, !tbaa !5
  %18 = load i8, ptr %17, align 1, !tbaa !11
  %19 = sext i8 %18 to i32
  %20 = icmp ne i32 %19, 0
  br i1 %20, label %21, label %45

21:                                               ; preds = %16
  %22 = load ptr, ptr %3, align 8, !tbaa !5
  %23 = load i8, ptr %22, align 1, !tbaa !11
  %24 = call i32 @is_between(i8 noundef signext %23, i8 noundef signext 48, i8 noundef signext 57)
  %25 = icmp ne i32 %24, 0
  br i1 %25, label %27, label %26

26:                                               ; preds = %21
  store i32 -2, ptr %2, align 4
  store i32 1, ptr %5, align 4
  br label %47

27:                                               ; preds = %21
  %28 = load i32, ptr %4, align 4, !tbaa !9
  %29 = load ptr, ptr %3, align 8, !tbaa !5
  %30 = load i8, ptr %29, align 1, !tbaa !11
  %31 = call i32 @int_of_digit(i8 noundef signext %30)
  %32 = sub nsw i32 2147483647, %31
  %33 = sdiv i32 %32, 10
  %34 = icmp sgt i32 %28, %33
  br i1 %34, label %35, label %36

35:                                               ; preds = %27
  store i32 -3, ptr %2, align 4
  store i32 1, ptr %5, align 4
  br label %47

36:                                               ; preds = %27
  %37 = load i32, ptr %4, align 4, !tbaa !9
  %38 = mul nsw i32 10, %37
  %39 = load ptr, ptr %3, align 8, !tbaa !5
  %40 = load i8, ptr %39, align 1, !tbaa !11
  %41 = call i32 @int_of_digit(i8 noundef signext %40)
  %42 = add nsw i32 %38, %41
  store i32 %42, ptr %4, align 4, !tbaa !9
  %43 = load ptr, ptr %3, align 8, !tbaa !5
  %44 = getelementptr inbounds i8, ptr %43, i32 1
  store ptr %44, ptr %3, align 8, !tbaa !5
  br label %16, !llvm.loop !12

45:                                               ; preds = %16
  %46 = load i32, ptr %4, align 4, !tbaa !9
  store i32 %46, ptr %2, align 4
  store i32 1, ptr %5, align 4
  br label %47

47:                                               ; preds = %45, %35, %26, %14, %8
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #2
  %48 = load i32, ptr %2, align 4
  ret i32 %48
}

; Function Attrs: nounwind uwtable
declare hidden i32 @is_between(i8 noundef signext, i8 noundef signext, i8 noundef signext) #1

; Function Attrs: nounwind uwtable
declare hidden i32 @int_of_digit(i8 noundef signext) #1

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 = !{!"int", !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
define dso_local i32 @int_of_string(ptr noundef readonly %0) local_unnamed_addr #0 {
  %2 = icmp eq ptr %0, null
  br i1 %2, label %.loopexit, label %3

3:                                                ; preds = %1
  %4 = load i8, ptr %0, align 1, !tbaa !5
  %5 = icmp eq i8 %4, 0
  br i1 %5, label %.loopexit, label %.preheader

.preheader:                                       ; preds = %3, %14
  %.015 = phi i32 [ %18, %14 ], [ 0, %3 ]
  %.01014 = phi ptr [ %19, %14 ], [ %0, %3 ]
  %6 = phi i8 [ %.pr, %14 ], [ %4, %3 ]
  %7 = tail call i32 @is_between(i8 noundef signext %6, i8 noundef signext 48, i8 noundef signext 57)
  %.not13 = icmp eq i32 %7, 0
  br i1 %.not13, label %.loopexit, label %8

8:                                                ; preds = %.preheader
  %9 = load i8, ptr %.01014, align 1, !tbaa !5
  %10 = tail call i32 @int_of_digit(i8 noundef signext %9)
  %11 = sub nsw i32 2147483647, %10
  %12 = udiv i32 %11, 10
  %13 = icmp sgt i32 %.015, %12
  br i1 %13, label %.loopexit, label %14

14:                                               ; preds = %8
  %15 = mul nsw i32 %.015, 10
  %16 = load i8, ptr %.01014, align 1, !tbaa !5
  %17 = tail call i32 @int_of_digit(i8 noundef signext %16)
  %18 = add nsw i32 %17, %15
  %19 = getelementptr inbounds i8, ptr %.01014, i64 1
  %.pr = load i8, ptr %19, align 1, !tbaa !5
  %.not = icmp eq i8 %.pr, 0
  br i1 %.not, label %.loopexit, label %.preheader, !llvm.loop !8

.loopexit:                                        ; preds = %14, %8, %.preheader, %3, %1
  %.011 = phi i32 [ -1, %1 ], [ -2, %3 ], [ %18, %14 ], [ -3, %8 ], [ -2, %.preheader ]
  ret i32 %.011
}

; Function Attrs: nounwind uwtable
declare hidden i32 @is_between(i8 noundef signext, i8 noundef signext, i8 noundef signext) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
declare hidden i32 @int_of_digit(i8 noundef signext) local_unnamed_addr #0

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: EarlyCSEPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass