; LLVM IR from HANDS-FREE/OpenRE :: 3_OS/STM32F1/RTOS/uCOS-III2/uC-LIB (lib_ascii)

; 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 zeroext i8 @ASCII_IsDigHex(i8 noundef signext %0) #1 {
  %2 = alloca i8, align 1
  %3 = alloca i8, align 1
  store i8 %0, ptr %2, align 1, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 1, ptr %3) #2
  %4 = load i8, ptr %2, align 1, !tbaa !5
  %5 = sext i8 %4 to i32
  %6 = icmp sge i32 %5, 48
  br i1 %6, label %7, label %11

7:                                                ; preds = %1
  %8 = load i8, ptr %2, align 1, !tbaa !5
  %9 = sext i8 %8 to i32
  %10 = icmp sle i32 %9, 57
  br i1 %10, label %29, label %11

11:                                               ; preds = %7, %1
  %12 = load i8, ptr %2, align 1, !tbaa !5
  %13 = sext i8 %12 to i32
  %14 = icmp sge i32 %13, 65
  br i1 %14, label %15, label %19

15:                                               ; preds = %11
  %16 = load i8, ptr %2, align 1, !tbaa !5
  %17 = sext i8 %16 to i32
  %18 = icmp sle i32 %17, 70
  br i1 %18, label %29, label %19

19:                                               ; preds = %15, %11
  %20 = load i8, ptr %2, align 1, !tbaa !5
  %21 = sext i8 %20 to i32
  %22 = icmp sge i32 %21, 97
  br i1 %22, label %23, label %27

23:                                               ; preds = %19
  %24 = load i8, ptr %2, align 1, !tbaa !5
  %25 = sext i8 %24 to i32
  %26 = icmp sle i32 %25, 102
  br label %27

27:                                               ; preds = %23, %19
  %28 = phi i1 [ false, %19 ], [ %26, %23 ]
  br label %29

29:                                               ; preds = %27, %15, %7
  %30 = phi i1 [ true, %15 ], [ true, %7 ], [ %28, %27 ]
  %31 = zext i1 %30 to i64
  %32 = select i1 %30, i32 1, i32 0
  %33 = trunc i32 %32 to i8
  store i8 %33, ptr %3, align 1, !tbaa !5
  %34 = load i8, ptr %3, align 1, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 1, ptr %3) #2
  ret i8 %34
}

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 = !{!"omnipotent char", !7, i64 0}
!7 = !{!"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 zeroext range(i8 0, 2) i8 @ASCII_IsDigHex(i8 noundef signext %0) local_unnamed_addr #0 {
  %2 = add i8 %0, -48
  %or.cond = icmp ult i8 %2, 10
  %3 = and i8 %0, -33
  %4 = add i8 %3, -65
  %5 = icmp ult i8 %4, 6
  %narrow = or i1 %or.cond, %5
  %6 = zext i1 %narrow to i8
  ret i8 %6
}

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" }

!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: EarlyCSEPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass