; LLVM IR from chachaxw/data-structure-and-algorithm :: leetcode/binary_search/sqrt.ll (Z16sqrtByBabyloniani)

; 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: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i32 @_Z16sqrtByBabyloniani(i32 noundef %0) #1 {
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = alloca double, align 8
  %5 = alloca double, align 8
  %6 = alloca double, align 8
  store i32 %0, ptr %3, align 4, !tbaa !5
  %7 = load i32, ptr %3, align 4, !tbaa !5
  %8 = icmp eq i32 %7, 0
  br i1 %8, label %9, label %10

9:                                                ; preds = %1
  store i32 0, ptr %2, align 4
  br label %31

10:                                               ; preds = %1
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #2
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #2
  %11 = load i32, ptr %3, align 4, !tbaa !5
  %12 = sitofp i32 %11 to double
  store double %12, ptr %5, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #2
  %13 = load i32, ptr %3, align 4, !tbaa !5
  %14 = sitofp i32 %13 to double
  store double %14, ptr %6, align 8, !tbaa !9
  br label %15

15:                                               ; preds = %30, %10
  br label %16

16:                                               ; preds = %15
  %17 = load double, ptr %5, align 8, !tbaa !9
  store double %17, ptr %4, align 8, !tbaa !9
  %18 = load double, ptr %5, align 8, !tbaa !9
  %19 = load double, ptr %6, align 8, !tbaa !9
  %20 = load double, ptr %5, align 8, !tbaa !9
  %21 = fdiv double %19, %20
  %22 = fadd double %18, %21
  %23 = fdiv double %22, 2.000000e+00
  store double %23, ptr %5, align 8, !tbaa !9
  %24 = load double, ptr %4, align 8, !tbaa !9
  %25 = load double, ptr %5, align 8, !tbaa !9
  %26 = fcmp oeq double %24, %25
  br i1 %26, label %27, label %30

27:                                               ; preds = %16
  %28 = load double, ptr %5, align 8, !tbaa !9
  %29 = fptosi double %28 to i32
  store i32 %29, ptr %2, align 4
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #2
  br label %31

30:                                               ; preds = %16
  br label %15, !llvm.loop !11

31:                                               ; preds = %27, %9
  %32 = load i32, ptr %2, align 4
  ret i32 %32
}

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

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(none) uwtable
define dso_local noundef i32 @_Z16sqrtByBabyloniani(i32 noundef %0) local_unnamed_addr #0 {
  %2 = icmp eq i32 %0, 0
  br i1 %2, label %12, label %3

3:                                                ; preds = %1
  %4 = sitofp i32 %0 to double
  br label %5

5:                                                ; preds = %5, %3
  %.010 = phi double [ %4, %3 ], [ %8, %5 ]
  %6 = fdiv double %4, %.010
  %7 = fadd double %.010, %6
  %8 = fmul double %7, 5.000000e-01
  %9 = fcmp oeq double %.010, %8
  br i1 %9, label %10, label %5, !llvm.loop !5

10:                                               ; preds = %5
  %11 = fptosi double %8 to i32
  br label %12

12:                                               ; preds = %1, %10
  %.0 = phi i32 [ %11, %10 ], [ 0, %1 ]
  ret i32 %.0
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,LCSSAPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass