; LLVM IR from ahampriyanshu/algo-ds-101 :: Maths/Algebra/Babylonian (babylonian_square_root)

; 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: nounwind uwtable
define dso_local float @squareRoot(i32 noundef %0) #0 {
  %2 = alloca i32, align 4
  %3 = alloca float, align 4
  %4 = alloca float, align 4
  %5 = alloca float, align 4
  store i32 %0, ptr %2, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #2
  %6 = load i32, ptr %2, align 4, !tbaa !5
  %7 = sitofp i32 %6 to float
  store float %7, ptr %3, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #2
  store float 1.000000e+00, ptr %4, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #2
  store float 0x3EB0C6F7A0000000, ptr %5, align 4, !tbaa !9
  br label %8

8:                                                ; preds = %14, %1
  %9 = load float, ptr %3, align 4, !tbaa !9
  %10 = load float, ptr %4, align 4, !tbaa !9
  %11 = fsub float %9, %10
  %12 = load float, ptr %5, align 4, !tbaa !9
  %13 = fcmp ogt float %11, %12
  br i1 %13, label %14, label %23

14:                                               ; preds = %8
  %15 = load float, ptr %3, align 4, !tbaa !9
  %16 = load float, ptr %4, align 4, !tbaa !9
  %17 = fadd float %15, %16
  %18 = fdiv float %17, 2.000000e+00
  store float %18, ptr %3, align 4, !tbaa !9
  %19 = load i32, ptr %2, align 4, !tbaa !5
  %20 = sitofp i32 %19 to float
  %21 = load float, ptr %3, align 4, !tbaa !9
  %22 = fdiv float %20, %21
  store float %22, ptr %4, align 4, !tbaa !9
  br label %8, !llvm.loop !11

23:                                               ; preds = %8
  %24 = load float, ptr %3, align 4, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #2
  ret float %24
}

; 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 = { 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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"float", !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: nofree norecurse nosync nounwind memory(none) uwtable
define dso_local float @squareRoot(i32 noundef %0) local_unnamed_addr #0 {
  %2 = sitofp i32 %0 to float
  %3 = fadd float %2, -1.000000e+00
  %4 = fcmp ogt float %3, 0x3EB0C6F7A0000000
  br i1 %4, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %1, %.lr.ph
  %.010 = phi float [ %6, %.lr.ph ], [ %2, %1 ]
  %.089 = phi float [ %7, %.lr.ph ], [ 1.000000e+00, %1 ]
  %5 = fadd float %.089, %.010
  %6 = fmul float %5, 5.000000e-01
  %7 = fdiv float %2, %6
  %8 = fsub float %6, %7
  %9 = fcmp ogt float %8, 0x3EB0C6F7A0000000
  br i1 %9, label %.lr.ph, label %._crit_edge, !llvm.loop !5

._crit_edge:                                      ; preds = %.lr.ph, %1
  %.0.lcssa = phi float [ %2, %1 ], [ %6, %.lr.ph ]
  ret float %.0.lcssa
}

attributes #0 = { nofree norecurse nosync nounwind 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,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass