; LLVM IR from devicehive/esp8266-firmware :: firmware-src/sources (dhutils)

; 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 @hexToByte(ptr noundef %0, ptr noundef %1) #1 {
  %3 = alloca i32, align 4
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #3
  %9 = load ptr, ptr %4, align 8, !tbaa !5
  %10 = getelementptr inbounds i8, ptr %9, i64 0
  %11 = load i8, ptr %10, align 1, !tbaa !9
  %12 = sext i8 %11 to i32
  %13 = call i32 @hex2nibble(i32 noundef %12)
  store i32 %13, ptr %6, align 4, !tbaa !10
  %14 = load i32, ptr %6, align 4, !tbaa !10
  %15 = icmp slt i32 %14, 0
  br i1 %15, label %16, label %17

16:                                               ; preds = %2
  store i32 0, ptr %3, align 4
  store i32 1, ptr %7, align 4
  br label %37

17:                                               ; preds = %2
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #3
  %18 = load ptr, ptr %4, align 8, !tbaa !5
  %19 = getelementptr inbounds i8, ptr %18, i64 1
  %20 = load i8, ptr %19, align 1, !tbaa !9
  %21 = sext i8 %20 to i32
  %22 = call i32 @hex2nibble(i32 noundef %21)
  store i32 %22, ptr %8, align 4, !tbaa !10
  %23 = load i32, ptr %8, align 4, !tbaa !10
  %24 = icmp slt i32 %23, 0
  br i1 %24, label %25, label %29

25:                                               ; preds = %17
  %26 = load i32, ptr %6, align 4, !tbaa !10
  %27 = trunc i32 %26 to i8
  %28 = load ptr, ptr %5, align 8, !tbaa !5
  store i8 %27, ptr %28, align 1, !tbaa !9
  store i32 1, ptr %3, align 4
  store i32 1, ptr %7, align 4
  br label %36

29:                                               ; preds = %17
  %30 = load i32, ptr %6, align 4, !tbaa !10
  %31 = shl i32 %30, 4
  %32 = load i32, ptr %8, align 4, !tbaa !10
  %33 = or i32 %31, %32
  %34 = trunc i32 %33 to i8
  %35 = load ptr, ptr %5, align 8, !tbaa !5
  store i8 %34, ptr %35, align 1, !tbaa !9
  store i32 2, ptr %3, align 4
  store i32 1, ptr %7, align 4
  br label %36

36:                                               ; preds = %29, %25
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #3
  br label %37

37:                                               ; preds = %36, %16
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #3
  %38 = load i32, ptr %3, align 4
  ret i32 %38
}

; Function Attrs: inlinehint nounwind uwtable
declare hidden i32 @hex2nibble(i32 noundef) #2

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 = { inlinehint 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 = !{!7, !7, i64 0}
!10 = !{!11, !11, i64 0}
!11 = !{!"int", !7, i64 0}


; 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 range(i32 0, 3) i32 @hexToByte(ptr nocapture noundef readonly %0, ptr nocapture noundef writeonly %1) local_unnamed_addr #0 {
  %3 = load i8, ptr %0, align 1, !tbaa !5
  %4 = sext i8 %3 to i32
  %5 = tail call i32 @hex2nibble(i32 noundef %4)
  %6 = icmp slt i32 %5, 0
  br i1 %6, label %15, label %7

7:                                                ; preds = %2
  %8 = getelementptr inbounds i8, ptr %0, i64 1
  %9 = load i8, ptr %8, align 1, !tbaa !5
  %10 = sext i8 %9 to i32
  %11 = tail call i32 @hex2nibble(i32 noundef %10)
  %12 = icmp slt i32 %11, 0
  %13 = shl i32 %5, 4
  %14 = or i32 %11, %13
  %storemerge.in = select i1 %12, i32 %5, i32 %14
  %.0 = select i1 %12, i32 1, i32 2
  %storemerge = trunc i32 %storemerge.in to i8
  store i8 %storemerge, ptr %1, align 1, !tbaa !5
  br label %15

15:                                               ; preds = %2, %7
  %.1 = phi i32 [ %.0, %7 ], [ 0, %2 ]
  ret i32 %.1
}

; Function Attrs: inlinehint nounwind uwtable
declare hidden i32 @hex2nibble(i32 noundef) local_unnamed_addr #1

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" }
attributes #1 = { inlinehint 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"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass