; LLVM IR from tangjz/acm-icpc :: codeforces/complete/1C.ll (Z4fgcddd)

; 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 double @_Z4fgcddd(double noundef %0, double noundef %1) #0 {
  %3 = alloca double, align 8
  %4 = alloca double, align 8
  %5 = alloca double, align 8
  store double %0, ptr %4, align 8, !tbaa !5
  store double %1, ptr %5, align 8, !tbaa !5
  %6 = load double, ptr %4, align 8, !tbaa !5
  %7 = fsub double %6, 0.000000e+00
  %8 = call double @llvm.fabs.f64(double %7)
  %9 = fcmp olt double %8, 1.000000e-02
  br i1 %9, label %10, label %12

10:                                               ; preds = %2
  %11 = load double, ptr %5, align 8, !tbaa !5
  store double %11, ptr %3, align 8
  br label %25

12:                                               ; preds = %2
  %13 = load double, ptr %5, align 8, !tbaa !5
  %14 = fsub double %13, 0.000000e+00
  %15 = call double @llvm.fabs.f64(double %14)
  %16 = fcmp olt double %15, 1.000000e-02
  br i1 %16, label %17, label %19

17:                                               ; preds = %12
  %18 = load double, ptr %4, align 8, !tbaa !5
  store double %18, ptr %3, align 8
  br label %25

19:                                               ; preds = %12
  %20 = load double, ptr %5, align 8, !tbaa !5
  %21 = load double, ptr %4, align 8, !tbaa !5
  %22 = load double, ptr %5, align 8, !tbaa !5
  %23 = call double @fmod(double noundef %21, double noundef %22) #3
  %24 = call noundef double @_Z4fgcddd(double noundef %20, double noundef %23)
  store double %24, ptr %3, align 8
  br label %25

25:                                               ; preds = %19, %17, %10
  %26 = load double, ptr %3, align 8
  ret double %26
}

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare double @llvm.fabs.f64(double) #1

; Function Attrs: nounwind
declare double @fmod(double noundef, double noundef) #2

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 speculatable willreturn memory(none) }
attributes #2 = { nounwind "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 #3 = { 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 = !{!"double", !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"

; Function Attrs: mustprogress nofree nounwind memory(write) uwtable
define dso_local noundef double @_Z4fgcddd(double noundef %0, double noundef %1) local_unnamed_addr #0 {
  %3 = tail call double @llvm.fabs.f64(double %0)
  %4 = fcmp olt double %3, 1.000000e-02
  br i1 %4, label %._crit_edge, label %.lr.ph.preheader

.lr.ph.preheader:                                 ; preds = %2
  %5 = tail call double @llvm.fabs.f64(double %1)
  %6 = fcmp olt double %5, 1.000000e-02
  br i1 %6, label %._crit_edge, label %tailrecurse

tailrecurse:                                      ; preds = %.lr.ph.preheader, %tailrecurse
  %.tr913 = phi double [ %.tr81012, %tailrecurse ], [ %0, %.lr.ph.preheader ]
  %.tr81012 = phi double [ %7, %tailrecurse ], [ %1, %.lr.ph.preheader ]
  %7 = tail call double @fmod(double noundef %.tr913, double noundef %.tr81012) #3
  %8 = tail call double @llvm.fabs.f64(double %7)
  %9 = fcmp olt double %8, 1.000000e-02
  br i1 %9, label %._crit_edge, label %tailrecurse

._crit_edge:                                      ; preds = %tailrecurse, %.lr.ph.preheader, %2
  %.0 = phi double [ %1, %2 ], [ %0, %.lr.ph.preheader ], [ %.tr81012, %tailrecurse ]
  ret double %.0
}

; Function Attrs: mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare double @llvm.fabs.f64(double) #1

; Function Attrs: mustprogress nofree nounwind willreturn memory(write)
declare double @fmod(double noundef, double noundef) local_unnamed_addr #2

attributes #0 = { mustprogress nofree nounwind memory(write) 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 = { mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #2 = { mustprogress nofree nounwind willreturn memory(write) "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 #3 = { 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)"}


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