; LLVM IR from VastoLorde95/Competitive-Programming :: Hackerrank/Company Contests/Sears 2016/Problem G/G.ll (Z6getfibx)

; 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"

@m = external dso_local global [3 x [3 x i64]], align 16

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_Z4fastx(i64 noundef) #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i64 @_Z6getfibx(i64 noundef %0) #0 {
  %2 = alloca i64, align 8
  %3 = alloca i64, align 8
  store i64 %0, ptr %3, align 8, !tbaa !5
  %4 = load i64, ptr %3, align 8, !tbaa !5
  %5 = icmp eq i64 %4, -1
  br i1 %5, label %6, label %7

6:                                                ; preds = %1
  store i64 0, ptr %2, align 8
  br label %14

7:                                                ; preds = %1
  %8 = load i64, ptr %3, align 8, !tbaa !5
  %9 = icmp sle i64 %8, 1
  br i1 %9, label %10, label %11

10:                                               ; preds = %7
  store i64 1, ptr %2, align 8
  br label %14

11:                                               ; preds = %7
  store i64 1, ptr getelementptr inbounds ([3 x i64], ptr getelementptr inbounds ([3 x [3 x i64]], ptr @m, i64 0, i64 1), i64 0, i64 1), align 8, !tbaa !5
  store i64 1, ptr getelementptr inbounds ([3 x i64], ptr getelementptr inbounds ([3 x [3 x i64]], ptr @m, i64 0, i64 1), i64 0, i64 2), align 8, !tbaa !5
  store i64 1, ptr getelementptr inbounds ([3 x i64], ptr getelementptr inbounds ([3 x [3 x i64]], ptr @m, i64 0, i64 2), i64 0, i64 1), align 8, !tbaa !5
  store i64 0, ptr getelementptr inbounds ([3 x i64], ptr getelementptr inbounds ([3 x [3 x i64]], ptr @m, i64 0, i64 2), i64 0, i64 2), align 16, !tbaa !5
  %12 = load i64, ptr %3, align 8, !tbaa !5
  call void @_Z4fastx(i64 noundef %12)
  %13 = load i64, ptr getelementptr inbounds ([3 x i64], ptr getelementptr inbounds ([3 x [3 x i64]], ptr @m, i64 0, i64 1), i64 0, i64 1), align 8, !tbaa !5
  store i64 %13, ptr %2, align 8
  br label %14

14:                                               ; preds = %11, %10, %6
  %15 = load i64, ptr %2, align 8
  ret i64 %15
}

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 = !{!"long long", !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"

@m = external dso_local local_unnamed_addr global [3 x [3 x i64]], align 16

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_Z4fastx(i64 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i64 @_Z6getfibx(i64 noundef %0) local_unnamed_addr #0 {
  %2 = icmp eq i64 %0, -1
  br i1 %2, label %7, label %3

3:                                                ; preds = %1
  %4 = icmp slt i64 %0, 2
  br i1 %4, label %7, label %5

5:                                                ; preds = %3
  store i64 1, ptr getelementptr inbounds (i8, ptr @m, i64 32), align 16, !tbaa !5
  store i64 1, ptr getelementptr inbounds (i8, ptr @m, i64 40), align 8, !tbaa !5
  store i64 1, ptr getelementptr inbounds (i8, ptr @m, i64 56), align 8, !tbaa !5
  store i64 0, ptr getelementptr inbounds (i8, ptr @m, i64 64), align 16, !tbaa !5
  tail call void @_Z4fastx(i64 noundef %0)
  %6 = load i64, ptr getelementptr inbounds (i8, ptr @m, i64 32), align 16, !tbaa !5
  br label %7

7:                                                ; preds = %3, %1, %5
  %.0 = phi i64 [ %6, %5 ], [ 0, %1 ], [ 1, %3 ]
  ret i64 %.0
}

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 = !{!"long long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}


; Effective O3 passes: GlobalOptPass,InferAlignmentPass,InstCombinePass,SROAPass,SimplifyCFGPass,TailCallElimPass