; LLVM IR from Leet-Us-Code/DSA-A-Z-Practice :: Sid's Levels/Level - 1/Recursion/StringToInteger.ll (Z6isCharc)

; 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: mustprogress nounwind uwtable
define dso_local noundef i32 @_Z6isCharc(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 ne i32 %5, 48
  br i1 %6, label %7, label %44

7:                                                ; preds = %1
  %8 = load i8, ptr %3, align 1, !tbaa !5
  %9 = sext i8 %8 to i32
  %10 = icmp ne i32 %9, 49
  br i1 %10, label %11, label %44

11:                                               ; preds = %7
  %12 = load i8, ptr %3, align 1, !tbaa !5
  %13 = sext i8 %12 to i32
  %14 = icmp ne i32 %13, 50
  br i1 %14, label %15, label %44

15:                                               ; preds = %11
  %16 = load i8, ptr %3, align 1, !tbaa !5
  %17 = sext i8 %16 to i32
  %18 = icmp ne i32 %17, 51
  br i1 %18, label %19, label %44

19:                                               ; preds = %15
  %20 = load i8, ptr %3, align 1, !tbaa !5
  %21 = sext i8 %20 to i32
  %22 = icmp ne i32 %21, 52
  br i1 %22, label %23, label %44

23:                                               ; preds = %19
  %24 = load i8, ptr %3, align 1, !tbaa !5
  %25 = sext i8 %24 to i32
  %26 = icmp ne i32 %25, 53
  br i1 %26, label %27, label %44

27:                                               ; preds = %23
  %28 = load i8, ptr %3, align 1, !tbaa !5
  %29 = sext i8 %28 to i32
  %30 = icmp ne i32 %29, 54
  br i1 %30, label %31, label %44

31:                                               ; preds = %27
  %32 = load i8, ptr %3, align 1, !tbaa !5
  %33 = sext i8 %32 to i32
  %34 = icmp ne i32 %33, 55
  br i1 %34, label %35, label %44

35:                                               ; preds = %31
  %36 = load i8, ptr %3, align 1, !tbaa !5
  %37 = sext i8 %36 to i32
  %38 = icmp ne i32 %37, 56
  br i1 %38, label %39, label %44

39:                                               ; preds = %35
  %40 = load i8, ptr %3, align 1, !tbaa !5
  %41 = sext i8 %40 to i32
  %42 = icmp ne i32 %41, 57
  br i1 %42, label %43, label %44

43:                                               ; preds = %39
  store i32 1, ptr %2, align 4
  br label %45

44:                                               ; preds = %39, %35, %31, %27, %23, %19, %15, %11, %7, %1
  store i32 0, ptr %2, align 4
  br label %45

45:                                               ; preds = %44, %43
  %46 = load i32, ptr %2, align 4
  ret i32 %46
}

attributes #0 = { mustprogress 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++ 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 noundef range(i32 0, 2) i32 @_Z6isCharc(i8 noundef signext %0) local_unnamed_addr #0 {
  %2 = add i8 %0, -58
  %or.cond26 = icmp ult i8 %2, -10
  %. = zext i1 %or.cond26 to i32
  ret i32 %.
}

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