; LLVM IR from tangjz/acm-icpc :: buaa/oj3rd/1113.ll (Z5transPc)

; 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"

@out = external dso_local global ptr, align 8

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i32 @_Z5transPc(ptr noundef %0) #0 {
  %2 = alloca i32, align 4
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #2
  store i32 0, ptr %4, align 4, !tbaa !9
  br label %6

6:                                                ; preds = %32, %1
  %7 = load i32, ptr %4, align 4, !tbaa !9
  %8 = icmp slt i32 %7, 4
  br i1 %8, label %10, label %9

9:                                                ; preds = %6
  store i32 2, ptr %5, align 4
  br label %35

10:                                               ; preds = %6
  %11 = load ptr, ptr %3, align 8, !tbaa !5
  %12 = getelementptr inbounds i8, ptr %11, i64 1
  %13 = load i8, ptr %12, align 1, !tbaa !11
  %14 = sext i8 %13 to i32
  %15 = load ptr, ptr @out, align 8, !tbaa !5
  %16 = load i32, ptr %4, align 4, !tbaa !9
  %17 = sext i32 %16 to i64
  %18 = getelementptr inbounds i8, ptr %15, i64 %17
  %19 = load i8, ptr %18, align 1, !tbaa !11
  %20 = sext i8 %19 to i32
  %21 = icmp eq i32 %14, %20
  br i1 %21, label %22, label %31

22:                                               ; preds = %10
  %23 = load i32, ptr %4, align 4, !tbaa !9
  %24 = mul nsw i32 %23, 9
  %25 = load ptr, ptr %3, align 8, !tbaa !5
  %26 = getelementptr inbounds i8, ptr %25, i64 0
  %27 = load i8, ptr %26, align 1, !tbaa !11
  %28 = sext i8 %27 to i32
  %29 = add nsw i32 %24, %28
  %30 = sub nsw i32 %29, 49
  store i32 %30, ptr %2, align 4
  store i32 1, ptr %5, align 4
  br label %35

31:                                               ; preds = %10
  br label %32

32:                                               ; preds = %31
  %33 = load i32, ptr %4, align 4, !tbaa !9
  %34 = add nsw i32 %33, 1
  store i32 %34, ptr %4, align 4, !tbaa !9
  br label %6, !llvm.loop !12

35:                                               ; preds = %22, %9
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #2
  %36 = load i32, ptr %5, align 4
  switch i32 %36, label %40 [
    i32 2, label %37
    i32 1, label %38
  ]

37:                                               ; preds = %35
  store i32 -1, ptr %2, align 4
  br label %38

38:                                               ; preds = %37, %35
  %39 = load i32, ptr %2, align 4
  ret i32 %39

40:                                               ; preds = %35
  unreachable
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

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" }
attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!7, !7, i64 0}
!12 = distinct !{!12, !13}
!13 = !{!"llvm.loop.mustprogress"}


; 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"

@out = external dso_local local_unnamed_addr global ptr, align 8

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(read, inaccessiblemem: none) uwtable
define dso_local noundef i32 @_Z5transPc(ptr nocapture noundef readonly %0) local_unnamed_addr #0 {
  %2 = getelementptr inbounds i8, ptr %0, i64 1
  %3 = load i8, ptr %2, align 1, !tbaa !5
  %4 = load ptr, ptr @out, align 8, !tbaa !8
  %5 = load i8, ptr %4, align 1, !tbaa !5
  %6 = icmp eq i8 %3, %5
  br i1 %6, label %7, label %11

7:                                                ; preds = %19, %15, %11, %1
  %.0710.lcssa.wide = phi i32 [ -49, %1 ], [ -40, %11 ], [ -31, %15 ], [ -22, %19 ]
  %8 = load i8, ptr %0, align 1, !tbaa !5
  %9 = sext i8 %8 to i32
  %10 = add nsw i32 %.0710.lcssa.wide, %9
  br label %.loopexit

11:                                               ; preds = %1
  %12 = getelementptr inbounds i8, ptr %4, i64 1
  %13 = load i8, ptr %12, align 1, !tbaa !5
  %14 = icmp eq i8 %3, %13
  br i1 %14, label %7, label %15

15:                                               ; preds = %11
  %16 = getelementptr inbounds i8, ptr %4, i64 2
  %17 = load i8, ptr %16, align 1, !tbaa !5
  %18 = icmp eq i8 %3, %17
  br i1 %18, label %7, label %19

19:                                               ; preds = %15
  %20 = getelementptr inbounds i8, ptr %4, i64 3
  %21 = load i8, ptr %20, align 1, !tbaa !5
  %22 = icmp eq i8 %3, %21
  br i1 %22, label %7, label %.loopexit

.loopexit:                                        ; preds = %19, %7
  %spec.select = phi i32 [ %10, %7 ], [ -1, %19 ]
  ret i32 %spec.select
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(read, inaccessiblemem: 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)"}
!5 = !{!6, !6, i64 0}
!6 = !{!"omnipotent char", !7, i64 0}
!7 = !{!"Simple C++ TBAA"}
!8 = !{!9, !9, i64 0}
!9 = !{!"any pointer", !6, i64 0}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LCSSAPass,LICMPass,LoopRotatePass,LoopSimplifyPass,PostOrderFunctionAttrsPass,ReassociatePass,SCCPPass,SROAPass,SimplifyCFGPass