; LLVM IR from AnneLivia/Competitive-Programming :: Online Judges/URI/1077/main.ll (Z5preceRKc)

; 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 @_Z5preceRKc(ptr noundef nonnull align 1 dereferenceable(1) %0) #0 {
  %2 = alloca i32, align 4
  %3 = alloca ptr, align 8
  store ptr %0, ptr %3, align 8, !tbaa !5
  %4 = load ptr, ptr %3, align 8, !tbaa !5
  %5 = load i8, ptr %4, align 1, !tbaa !9
  %6 = sext i8 %5 to i32
  %7 = icmp eq i32 %6, 45
  br i1 %7, label %13, label %8

8:                                                ; preds = %1
  %9 = load ptr, ptr %3, align 8, !tbaa !5
  %10 = load i8, ptr %9, align 1, !tbaa !9
  %11 = sext i8 %10 to i32
  %12 = icmp eq i32 %11, 43
  br i1 %12, label %13, label %14

13:                                               ; preds = %8, %1
  store i32 1, ptr %2, align 4
  br label %34

14:                                               ; preds = %8
  %15 = load ptr, ptr %3, align 8, !tbaa !5
  %16 = load i8, ptr %15, align 1, !tbaa !9
  %17 = sext i8 %16 to i32
  %18 = icmp eq i32 %17, 42
  br i1 %18, label %24, label %19

19:                                               ; preds = %14
  %20 = load ptr, ptr %3, align 8, !tbaa !5
  %21 = load i8, ptr %20, align 1, !tbaa !9
  %22 = sext i8 %21 to i32
  %23 = icmp eq i32 %22, 47
  br i1 %23, label %24, label %25

24:                                               ; preds = %19, %14
  store i32 2, ptr %2, align 4
  br label %34

25:                                               ; preds = %19
  %26 = load ptr, ptr %3, align 8, !tbaa !5
  %27 = load i8, ptr %26, align 1, !tbaa !9
  %28 = sext i8 %27 to i32
  %29 = icmp eq i32 %28, 94
  br i1 %29, label %30, label %31

30:                                               ; preds = %25
  store i32 3, ptr %2, align 4
  br label %34

31:                                               ; preds = %25
  br label %32

32:                                               ; preds = %31
  br label %33

33:                                               ; preds = %32
  store i32 0, ptr %2, align 4
  br label %34

34:                                               ; preds = %33, %30, %24, %13
  %35 = load i32, ptr %2, align 4
  ret i32 %35
}

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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!7, !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: mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: read) uwtable
define dso_local noundef range(i32 0, 4) i32 @_Z5preceRKc(ptr nocapture noundef nonnull readonly align 1 dereferenceable(1) %0) local_unnamed_addr #0 {
  %2 = load i8, ptr %0, align 1, !tbaa !5
  switch i8 %2, label %5 [
    i8 45, label %6
    i8 43, label %6
    i8 42, label %3
    i8 47, label %3
    i8 94, label %4
  ]

3:                                                ; preds = %1, %1
  br label %6

4:                                                ; preds = %1
  br label %6

5:                                                ; preds = %1
  br label %6

6:                                                ; preds = %1, %1, %5, %4, %3
  %.0 = phi i32 [ 2, %3 ], [ 3, %4 ], [ 0, %5 ], [ 1, %1 ], [ 1, %1 ]
  ret i32 %.0
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: read) 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"}


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