; LLVM IR from codemistic/Data-Structures-and-Algorithms :: CPP/Trees/Expression_tree (BST)

; 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: nounwind uwtable
define dso_local i32 @isAlNum(i8 noundef signext %0) #0 {
  %2 = alloca i32, align 4
  %3 = alloca i8, align 1
  store i8 %0, ptr %3, align 1, !tbaa !5
  %4 = load i8, ptr %3, align 1, !tbaa !5
  %5 = sext i8 %4 to i32
  %6 = icmp sge i32 %5, 48
  br i1 %6, label %7, label %12

7:                                                ; preds = %1
  %8 = load i8, ptr %3, align 1, !tbaa !5
  %9 = sext i8 %8 to i32
  %10 = icmp sle i32 %9, 57
  br i1 %10, label %11, label %12

11:                                               ; preds = %7
  store i32 1, ptr %2, align 4
  br label %31

12:                                               ; preds = %7, %1
  %13 = load i8, ptr %3, align 1, !tbaa !5
  %14 = sext i8 %13 to i32
  %15 = icmp sge i32 %14, 65
  br i1 %15, label %16, label %21

16:                                               ; preds = %12
  %17 = load i8, ptr %3, align 1, !tbaa !5
  %18 = sext i8 %17 to i32
  %19 = icmp sle i32 %18, 90
  br i1 %19, label %20, label %21

20:                                               ; preds = %16
  store i32 1, ptr %2, align 4
  br label %31

21:                                               ; preds = %16, %12
  %22 = load i8, ptr %3, align 1, !tbaa !5
  %23 = sext i8 %22 to i32
  %24 = icmp sge i32 %23, 97
  br i1 %24, label %25, label %30

25:                                               ; preds = %21
  %26 = load i8, ptr %3, align 1, !tbaa !5
  %27 = sext i8 %26 to i32
  %28 = icmp sle i32 %27, 122
  br i1 %28, label %29, label %30

29:                                               ; preds = %25
  store i32 1, ptr %2, align 4
  br label %31

30:                                               ; preds = %25, %21
  store i32 0, ptr %2, align 4
  br label %31

31:                                               ; preds = %30, %29, %20, %11
  %32 = load i32, ptr %2, align 4
  ret i32 %32
}

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"}


; 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 range(i32 0, 2) i32 @isAlNum(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, 26
  %narrow = or i1 %or.cond, %5
  %.0 = zext i1 %narrow to i32
  ret i32 %.0
}

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,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass