; LLVM IR from upupming/algorithm :: acwing/寒假每日一题（入门组）/week6/458. 比例简化 (main)

; 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"

%"class.std::basic_istream" = type { ptr, i64, %"class.std::basic_ios" }
%"class.std::basic_ios" = type { %"class.std::ios_base", ptr, i8, i8, ptr, ptr, ptr, ptr }
%"class.std::ios_base" = type { ptr, i64, i64, i32, i32, i32, ptr, %"struct.std::ios_base::_Words", [8 x %"struct.std::ios_base::_Words"], i32, ptr, %"class.std::locale" }
%"struct.std::ios_base::_Words" = type { ptr, i64 }
%"class.std::locale" = type { ptr }
%"class.std::basic_ostream" = type { ptr, %"class.std::basic_ios" }

@a = external dso_local global i32, align 4
@b = external dso_local global i32, align 4
@ap = external dso_local global i32, align 4
@bp = external dso_local global i32, align 4
@l = external dso_local global i32, align 4
@_ZSt3cin = external global %"class.std::basic_istream", align 8
@_ZSt4cout = external global %"class.std::basic_ostream", align 8
@.str = external hidden unnamed_addr constant [2 x i8], align 1

; Function Attrs: mustprogress uwtable
declare dso_local noundef i32 @_Z3gcdii(i32 noundef, i32 noundef) #0

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() #1 {
  %1 = alloca i32, align 4
  %2 = alloca double, align 8
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca double, align 8
  store i32 0, ptr %1, align 4
  %7 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 4 dereferenceable(4) @a)
  %8 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) %7, ptr noundef nonnull align 4 dereferenceable(4) @b)
  %9 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) %8, ptr noundef nonnull align 4 dereferenceable(4) @l)
  call void @llvm.lifetime.start.p0(i64 8, ptr %2) #5
  store double 1.000000e+10, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #5
  store i32 1, ptr %3, align 4, !tbaa !9
  br label %10

10:                                               ; preds = %56, %0
  %11 = load i32, ptr %3, align 4, !tbaa !9
  %12 = load i32, ptr @l, align 4, !tbaa !9
  %13 = icmp sle i32 %11, %12
  br i1 %13, label %15, label %14

14:                                               ; preds = %10
  store i32 2, ptr %4, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #5
  br label %59

15:                                               ; preds = %10
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #5
  store i32 1, ptr %5, align 4, !tbaa !9
  br label %16

16:                                               ; preds = %52, %15
  %17 = load i32, ptr %5, align 4, !tbaa !9
  %18 = load i32, ptr @l, align 4, !tbaa !9
  %19 = icmp sle i32 %17, %18
  br i1 %19, label %21, label %20

20:                                               ; preds = %16
  store i32 5, ptr %4, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #5
  br label %55

21:                                               ; preds = %16
  %22 = load i32, ptr %3, align 4, !tbaa !9
  %23 = load i32, ptr %5, align 4, !tbaa !9
  %24 = call noundef i32 @_Z3gcdii(i32 noundef %22, i32 noundef %23)
  %25 = icmp ne i32 %24, 1
  br i1 %25, label %26, label %27

26:                                               ; preds = %21
  br label %52

27:                                               ; preds = %21
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #5
  %28 = load i32, ptr %3, align 4, !tbaa !9
  %29 = sitofp i32 %28 to double
  %30 = fmul double 1.000000e+00, %29
  %31 = load i32, ptr %5, align 4, !tbaa !9
  %32 = sitofp i32 %31 to double
  %33 = fdiv double %30, %32
  %34 = load i32, ptr @a, align 4, !tbaa !9
  %35 = sitofp i32 %34 to double
  %36 = fmul double 1.000000e+00, %35
  %37 = load i32, ptr @b, align 4, !tbaa !9
  %38 = sitofp i32 %37 to double
  %39 = fdiv double %36, %38
  %40 = fsub double %33, %39
  store double %40, ptr %6, align 8, !tbaa !5
  %41 = load double, ptr %6, align 8, !tbaa !5
  %42 = fcmp oge double %41, 0.000000e+00
  br i1 %42, label %43, label %51

43:                                               ; preds = %27
  %44 = load double, ptr %6, align 8, !tbaa !5
  %45 = load double, ptr %2, align 8, !tbaa !5
  %46 = fcmp olt double %44, %45
  br i1 %46, label %47, label %51

47:                                               ; preds = %43
  %48 = load double, ptr %6, align 8, !tbaa !5
  store double %48, ptr %2, align 8, !tbaa !5
  %49 = load i32, ptr %3, align 4, !tbaa !9
  store i32 %49, ptr @ap, align 4, !tbaa !9
  %50 = load i32, ptr %5, align 4, !tbaa !9
  store i32 %50, ptr @bp, align 4, !tbaa !9
  br label %51

51:                                               ; preds = %47, %43, %27
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #5
  br label %52

52:                                               ; preds = %51, %26
  %53 = load i32, ptr %5, align 4, !tbaa !9
  %54 = add nsw i32 %53, 1
  store i32 %54, ptr %5, align 4, !tbaa !9
  br label %16, !llvm.loop !11

55:                                               ; preds = %20
  br label %56

56:                                               ; preds = %55
  %57 = load i32, ptr %3, align 4, !tbaa !9
  %58 = add nsw i32 %57, 1
  store i32 %58, ptr %3, align 4, !tbaa !9
  br label %10, !llvm.loop !13

59:                                               ; preds = %14
  %60 = load i32, ptr @ap, align 4, !tbaa !9
  %61 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i32 noundef %60)
  %62 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) %61, ptr noundef @.str)
  %63 = load i32, ptr @bp, align 4, !tbaa !9
  %64 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8) %62, i32 noundef %63)
  %65 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8) %64, ptr noundef @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_)
  store i32 0, ptr %1, align 4
  store i32 1, ptr %4, align 4
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #5
  %66 = load i32, ptr %1, align 4
  ret i32 %66
}

declare noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 4 dereferenceable(4)) #2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #3

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #3

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) #4

declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8), i32 noundef) #2

; Function Attrs: mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) #0 align 2

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_(ptr noundef nonnull align 8 dereferenceable(8)) #4

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 = { mustprogress norecurse 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 = { "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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #4 = { inlinehint 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 #5 = { 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"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = distinct !{!13, !12}


; 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"

%"class.std::basic_istream" = type { ptr, i64, %"class.std::basic_ios" }
%"class.std::basic_ios" = type { %"class.std::ios_base", ptr, i8, i8, ptr, ptr, ptr, ptr }
%"class.std::ios_base" = type { ptr, i64, i64, i32, i32, i32, ptr, %"struct.std::ios_base::_Words", [8 x %"struct.std::ios_base::_Words"], i32, ptr, %"class.std::locale" }
%"struct.std::ios_base::_Words" = type { ptr, i64 }
%"class.std::locale" = type { ptr }
%"class.std::basic_ostream" = type { ptr, %"class.std::basic_ios" }

@a = external dso_local global i32, align 4
@b = external dso_local global i32, align 4
@ap = external dso_local local_unnamed_addr global i32, align 4
@bp = external dso_local local_unnamed_addr global i32, align 4
@l = external dso_local global i32, align 4
@_ZSt3cin = external global %"class.std::basic_istream", align 8
@_ZSt4cout = external global %"class.std::basic_ostream", align 8
@.str = external hidden unnamed_addr constant [2 x i8], align 1

; Function Attrs: mustprogress uwtable
declare dso_local noundef i32 @_Z3gcdii(i32 noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() local_unnamed_addr #1 {
  %1 = tail call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 4 dereferenceable(4) @a)
  %2 = tail call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) %1, ptr noundef nonnull align 4 dereferenceable(4) @b)
  %3 = tail call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) %2, ptr noundef nonnull align 4 dereferenceable(4) @l)
  %4 = load i32, ptr @l, align 4, !tbaa !5
  %.not22 = icmp slt i32 %4, 1
  br i1 %.not22, label %._crit_edge25, label %.preheader

.preheader:                                       ; preds = %0, %._crit_edge
  %5 = phi i32 [ %13, %._crit_edge ], [ %4, %0 ]
  %.01424 = phi i32 [ %14, %._crit_edge ], [ 1, %0 ]
  %.01523 = phi double [ %.1.lcssa, %._crit_edge ], [ 1.000000e+10, %0 ]
  %.not1719 = icmp slt i32 %5, 1
  br i1 %.not1719, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %.preheader
  %6 = uitofp nneg i32 %.01424 to double
  br label %15

._crit_edge25:                                    ; preds = %._crit_edge, %0
  %7 = load i32, ptr @ap, align 4, !tbaa !5
  %8 = tail call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i32 noundef %7)
  %9 = tail call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) %8, ptr noundef nonnull @.str)
  %10 = load i32, ptr @bp, align 4, !tbaa !5
  %11 = tail call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8) %9, i32 noundef %10)
  %12 = tail call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8) %11, ptr noundef nonnull @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_)
  ret i32 0

._crit_edge:                                      ; preds = %29, %.preheader
  %13 = phi i32 [ %5, %.preheader ], [ %31, %29 ]
  %.1.lcssa = phi double [ %.01523, %.preheader ], [ %.3, %29 ]
  %14 = add nuw nsw i32 %.01424, 1
  %.not.not = icmp slt i32 %.01424, %13
  br i1 %.not.not, label %.preheader, label %._crit_edge25, !llvm.loop !9

15:                                               ; preds = %.lr.ph, %29
  %.021 = phi i32 [ 1, %.lr.ph ], [ %30, %29 ]
  %.120 = phi double [ %.01523, %.lr.ph ], [ %.3, %29 ]
  %16 = tail call noundef i32 @_Z3gcdii(i32 noundef %.01424, i32 noundef %.021)
  %.not18 = icmp eq i32 %16, 1
  br i1 %.not18, label %17, label %29

17:                                               ; preds = %15
  %18 = uitofp nneg i32 %.021 to double
  %19 = fdiv double %6, %18
  %20 = load i32, ptr @a, align 4, !tbaa !5
  %21 = sitofp i32 %20 to double
  %22 = load i32, ptr @b, align 4, !tbaa !5
  %23 = sitofp i32 %22 to double
  %24 = fdiv double %21, %23
  %25 = fsub double %19, %24
  %26 = fcmp oge double %25, 0.000000e+00
  %27 = fcmp olt double %25, %.120
  %or.cond = select i1 %26, i1 %27, i1 false
  br i1 %or.cond, label %28, label %29

28:                                               ; preds = %17
  store i32 %.01424, ptr @ap, align 4, !tbaa !5
  store i32 %.021, ptr @bp, align 4, !tbaa !5
  br label %29

29:                                               ; preds = %17, %28, %15
  %.3 = phi double [ %.120, %15 ], [ %25, %28 ], [ %.120, %17 ]
  %30 = add nuw nsw i32 %.021, 1
  %31 = load i32, ptr @l, align 4, !tbaa !5
  %.not17.not = icmp slt i32 %.021, %31
  br i1 %.not17.not, label %15, label %._crit_edge, !llvm.loop !12
}

declare noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #2

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) local_unnamed_addr #3

declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8), i32 noundef) local_unnamed_addr #2

; Function Attrs: mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) local_unnamed_addr #0 align 2

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_(ptr noundef nonnull align 8 dereferenceable(8)) #3

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 = { mustprogress norecurse 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 = { "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 = { inlinehint 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" }

!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 = distinct !{!9, !10, !11}
!10 = !{!"llvm.loop.mustprogress"}
!11 = !{!"llvm.loop.unswitch.partial.disable"}
!12 = distinct !{!12, !10}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopInstSimplifyPass,LoopRotatePass,LoopSimplifyCFGPass,LoopSimplifyPass,LoopUnrollPass,SCCPPass,SROAPass,SimpleLoopUnswitchPass,SimplifyCFGPass,TailCallElimPass