; LLVM IR from kazunetakahashi/atcoder :: 2017/0211_ABC054/A.ll (Z5solvev)

; 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"

@A = external dso_local global i32, align 4
@B = external dso_local global i32, align 4

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i32 @_Z5solvev() #0 {
  %1 = alloca i32, align 4
  %2 = load i32, ptr @A, align 4, !tbaa !5
  %3 = icmp eq i32 %2, 1
  br i1 %3, label %4, label %8

4:                                                ; preds = %0
  %5 = load i32, ptr @B, align 4, !tbaa !5
  %6 = icmp eq i32 %5, 1
  br i1 %6, label %7, label %8

7:                                                ; preds = %4
  store i32 2, ptr %1, align 4
  br label %27

8:                                                ; preds = %4, %0
  %9 = load i32, ptr @A, align 4, !tbaa !5
  %10 = icmp eq i32 %9, 1
  br i1 %10, label %11, label %12

11:                                               ; preds = %8
  store i32 0, ptr %1, align 4
  br label %27

12:                                               ; preds = %8
  %13 = load i32, ptr @B, align 4, !tbaa !5
  %14 = icmp eq i32 %13, 1
  br i1 %14, label %15, label %16

15:                                               ; preds = %12
  store i32 1, ptr %1, align 4
  br label %27

16:                                               ; preds = %12
  %17 = load i32, ptr @A, align 4, !tbaa !5
  %18 = load i32, ptr @B, align 4, !tbaa !5
  %19 = icmp eq i32 %17, %18
  br i1 %19, label %20, label %21

20:                                               ; preds = %16
  store i32 2, ptr %1, align 4
  br label %27

21:                                               ; preds = %16
  %22 = load i32, ptr @A, align 4, !tbaa !5
  %23 = load i32, ptr @B, align 4, !tbaa !5
  %24 = icmp slt i32 %22, %23
  br i1 %24, label %25, label %26

25:                                               ; preds = %21
  store i32 1, ptr %1, align 4
  br label %27

26:                                               ; preds = %21
  store i32 0, ptr %1, align 4
  br label %27

27:                                               ; preds = %26, %25, %20, %15, %11, %7
  %28 = load i32, ptr %1, align 4
  ret i32 %28
}

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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"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"

@A = external dso_local local_unnamed_addr global i32, align 4
@B = external dso_local local_unnamed_addr global i32, align 4

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(read, argmem: none, inaccessiblemem: none) uwtable
define dso_local noundef range(i32 0, 3) i32 @_Z5solvev() local_unnamed_addr #0 {
  %1 = load i32, ptr @A, align 4, !tbaa !5
  %2 = icmp eq i32 %1, 1
  %3 = load i32, ptr @B, align 4
  %4 = icmp eq i32 %3, 1
  %or.cond = select i1 %2, i1 %4, i1 false
  %.mux = select i1 %or.cond, i32 2, i32 0
  %brmerge4 = select i1 %2, i1 true, i1 %4
  %.mux.mux = select i1 %2, i32 %.mux, i32 1
  br i1 %brmerge4, label %9, label %5

5:                                                ; preds = %0
  %6 = icmp eq i32 %1, %3
  br i1 %6, label %9, label %7

7:                                                ; preds = %5
  %8 = icmp slt i32 %1, %3
  %. = zext i1 %8 to i32
  br label %9

9:                                                ; preds = %0, %7, %5
  %.0 = phi i32 [ %.mux.mux, %0 ], [ 2, %5 ], [ %., %7 ]
  ret i32 %.0
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(read, argmem: none, 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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}


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