; LLVM IR from UtkarshPathrabe/Competitive-Coding :: HackerRank Solutions/Algorithms/Warm Up/Is Fibo.ll (Z7BSearchPxiix)

; 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 uwtable
define dso_local noundef zeroext i1 @_Z7BSearchPxiix(ptr noundef %0, i32 noundef %1, i32 noundef %2, i64 noundef %3) #0 {
  %5 = alloca i1, align 1
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  %9 = alloca i64, align 8
  %10 = alloca i32, align 4
  %11 = alloca i32, align 4
  store ptr %0, ptr %6, align 8, !tbaa !5
  store i32 %1, ptr %7, align 4, !tbaa !9
  store i32 %2, ptr %8, align 4, !tbaa !9
  store i64 %3, ptr %9, align 8, !tbaa !11
  %12 = load i32, ptr %7, align 4, !tbaa !9
  %13 = load i32, ptr %8, align 4, !tbaa !9
  %14 = icmp sle i32 %12, %13
  br i1 %14, label %15, label %51

15:                                               ; preds = %4
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #2
  %16 = load i32, ptr %7, align 4, !tbaa !9
  %17 = load i32, ptr %8, align 4, !tbaa !9
  %18 = add nsw i32 %16, %17
  %19 = sdiv i32 %18, 2
  store i32 %19, ptr %10, align 4, !tbaa !9
  %20 = load ptr, ptr %6, align 8, !tbaa !5
  %21 = load i32, ptr %10, align 4, !tbaa !9
  %22 = sext i32 %21 to i64
  %23 = getelementptr inbounds i64, ptr %20, i64 %22
  %24 = load i64, ptr %23, align 8, !tbaa !11
  %25 = load i64, ptr %9, align 8, !tbaa !11
  %26 = icmp eq i64 %24, %25
  br i1 %26, label %27, label %28

27:                                               ; preds = %15
  store i1 true, ptr %5, align 1
  store i32 1, ptr %11, align 4
  br label %50

28:                                               ; preds = %15
  %29 = load ptr, ptr %6, align 8, !tbaa !5
  %30 = load i32, ptr %10, align 4, !tbaa !9
  %31 = sext i32 %30 to i64
  %32 = getelementptr inbounds i64, ptr %29, i64 %31
  %33 = load i64, ptr %32, align 8, !tbaa !11
  %34 = load i64, ptr %9, align 8, !tbaa !11
  %35 = icmp sgt i64 %33, %34
  br i1 %35, label %36, label %43

36:                                               ; preds = %28
  %37 = load ptr, ptr %6, align 8, !tbaa !5
  %38 = load i32, ptr %7, align 4, !tbaa !9
  %39 = load i32, ptr %10, align 4, !tbaa !9
  %40 = sub nsw i32 %39, 1
  %41 = load i64, ptr %9, align 8, !tbaa !11
  %42 = call noundef zeroext i1 @_Z7BSearchPxiix(ptr noundef %37, i32 noundef %38, i32 noundef %40, i64 noundef %41)
  store i1 %42, ptr %5, align 1
  store i32 1, ptr %11, align 4
  br label %50

43:                                               ; preds = %28
  %44 = load ptr, ptr %6, align 8, !tbaa !5
  %45 = load i32, ptr %10, align 4, !tbaa !9
  %46 = add nsw i32 %45, 1
  %47 = load i32, ptr %8, align 4, !tbaa !9
  %48 = load i64, ptr %9, align 8, !tbaa !11
  %49 = call noundef zeroext i1 @_Z7BSearchPxiix(ptr noundef %44, i32 noundef %46, i32 noundef %47, i64 noundef %48)
  store i1 %49, ptr %5, align 1
  store i32 1, ptr %11, align 4
  br label %50

50:                                               ; preds = %43, %36, %27
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #2
  br label %52

51:                                               ; preds = %4
  store i1 false, ptr %5, align 1
  br label %52

52:                                               ; preds = %51, %50
  %53 = load i1, ptr %5, align 1
  ret i1 %53
}

; 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 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 = !{!12, !12, i64 0}
!12 = !{!"long long", !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 zeroext i1 @_Z7BSearchPxiix(ptr nocapture noundef readonly %0, i32 noundef %1, i32 noundef %2, i64 noundef %3) local_unnamed_addr #0 {
  %.not2630 = icmp sgt i32 %1, %2
  br i1 %.not2630, label %tailrecurse.outer._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %4, %tailrecurse.outer
  %.tr23.ph32 = phi i32 [ %.tr2327, %tailrecurse.outer ], [ %2, %4 ]
  %.tr22.ph31 = phi i32 [ %15, %tailrecurse.outer ], [ %1, %4 ]
  br label %5

5:                                                ; preds = %.lr.ph, %tailrecurse
  %.tr2327 = phi i32 [ %.tr23.ph32, %.lr.ph ], [ %14, %tailrecurse ]
  %6 = add nsw i32 %.tr2327, %.tr22.ph31
  %7 = sdiv i32 %6, 2
  %8 = sext i32 %7 to i64
  %9 = getelementptr inbounds i64, ptr %0, i64 %8
  %10 = load i64, ptr %9, align 8, !tbaa !5
  %11 = icmp eq i64 %10, %3
  br i1 %11, label %tailrecurse.outer._crit_edge, label %12

12:                                               ; preds = %5
  %13 = icmp sgt i64 %10, %3
  br i1 %13, label %tailrecurse, label %tailrecurse.outer

tailrecurse:                                      ; preds = %12
  %14 = add nsw i32 %7, -1
  %.not.not = icmp slt i32 %.tr22.ph31, %7
  br i1 %.not.not, label %5, label %tailrecurse.outer._crit_edge

tailrecurse.outer:                                ; preds = %12
  %15 = add nsw i32 %7, 1
  %.not26.not = icmp slt i32 %7, %.tr2327
  br i1 %.not26.not, label %.lr.ph, label %tailrecurse.outer._crit_edge

tailrecurse.outer._crit_edge:                     ; preds = %tailrecurse.outer, %5, %tailrecurse, %4
  %.1 = phi i1 [ false, %4 ], [ %11, %tailrecurse ], [ %11, %5 ], [ false, %tailrecurse.outer ]
  ret i1 %.1
}

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


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass