; LLVM IR from tangjz/acm-icpc :: self_training/2015-02-22 (E)

; 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"

@t = external dso_local global i32, align 4
@n = external dso_local global i32, align 4
@a = external dso_local global [10001 x i32], align 16
@b = external dso_local global [10001 x i32], align 16
@c = external dso_local global [10001 x i32], align 16
@.str = external hidden unnamed_addr constant [3 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [7 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [6 x i8], align 1

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef double @_Z4maxfd(double noundef) #0

; 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

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() #2 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  %3 = alloca double, align 8
  %4 = alloca double, align 8
  %5 = alloca double, align 8
  %6 = alloca double, align 8
  store i32 0, ptr %1, align 4
  %7 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef @t)
  br label %8

8:                                                ; preds = %62, %0
  %9 = load i32, ptr @t, align 4, !tbaa !5
  %10 = add nsw i32 %9, -1
  store i32 %10, ptr @t, align 4, !tbaa !5
  %11 = icmp ne i32 %9, 0
  br i1 %11, label %12, label %66

12:                                               ; preds = %8
  %13 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef @n)
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #4
  store i32 0, ptr %2, align 4, !tbaa !5
  br label %14

14:                                               ; preds = %30, %12
  %15 = load i32, ptr %2, align 4, !tbaa !5
  %16 = load i32, ptr @n, align 4, !tbaa !5
  %17 = icmp slt i32 %15, %16
  br i1 %17, label %19, label %18

18:                                               ; preds = %14
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #4
  br label %33

19:                                               ; preds = %14
  %20 = load i32, ptr %2, align 4, !tbaa !5
  %21 = sext i32 %20 to i64
  %22 = getelementptr inbounds i32, ptr @a, i64 %21
  %23 = load i32, ptr %2, align 4, !tbaa !5
  %24 = sext i32 %23 to i64
  %25 = getelementptr inbounds i32, ptr @b, i64 %24
  %26 = load i32, ptr %2, align 4, !tbaa !5
  %27 = sext i32 %26 to i64
  %28 = getelementptr inbounds i32, ptr @c, i64 %27
  %29 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.1, ptr noundef %22, ptr noundef %25, ptr noundef %28)
  br label %30

30:                                               ; preds = %19
  %31 = load i32, ptr %2, align 4, !tbaa !5
  %32 = add nsw i32 %31, 1
  store i32 %32, ptr %2, align 4, !tbaa !5
  br label %14, !llvm.loop !9

33:                                               ; preds = %18
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #4
  store double 0.000000e+00, ptr %3, align 8, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #4
  store double 1.000000e+03, ptr %4, align 8, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #4
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #4
  br label %34

34:                                               ; preds = %61, %33
  %35 = load double, ptr %4, align 8, !tbaa !11
  %36 = load double, ptr %3, align 8, !tbaa !11
  %37 = fsub double %35, %36
  %38 = fcmp oge double %37, 1.000000e-09
  br i1 %38, label %39, label %62

39:                                               ; preds = %34
  %40 = load double, ptr %3, align 8, !tbaa !11
  %41 = load double, ptr %4, align 8, !tbaa !11
  %42 = load double, ptr %3, align 8, !tbaa !11
  %43 = fsub double %41, %42
  %44 = fdiv double %43, 3.000000e+00
  %45 = fadd double %40, %44
  store double %45, ptr %5, align 8, !tbaa !11
  %46 = load double, ptr %4, align 8, !tbaa !11
  %47 = load double, ptr %4, align 8, !tbaa !11
  %48 = load double, ptr %3, align 8, !tbaa !11
  %49 = fsub double %47, %48
  %50 = fdiv double %49, 3.000000e+00
  %51 = fsub double %46, %50
  store double %51, ptr %6, align 8, !tbaa !11
  %52 = load double, ptr %5, align 8, !tbaa !11
  %53 = call noundef double @_Z4maxfd(double noundef %52)
  %54 = load double, ptr %6, align 8, !tbaa !11
  %55 = call noundef double @_Z4maxfd(double noundef %54)
  %56 = fcmp olt double %53, %55
  br i1 %56, label %57, label %59

57:                                               ; preds = %39
  %58 = load double, ptr %6, align 8, !tbaa !11
  store double %58, ptr %4, align 8, !tbaa !11
  br label %61

59:                                               ; preds = %39
  %60 = load double, ptr %5, align 8, !tbaa !11
  store double %60, ptr %3, align 8, !tbaa !11
  br label %61

61:                                               ; preds = %59, %57
  br label %34, !llvm.loop !13

62:                                               ; preds = %34
  %63 = load double, ptr %3, align 8, !tbaa !11
  %64 = call noundef double @_Z4maxfd(double noundef %63)
  %65 = call i32 (ptr, ...) @printf(ptr noundef @.str.2, double noundef %64)
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #4
  br label %8, !llvm.loop !14

66:                                               ; preds = %8
  ret i32 0
}

declare i32 @__isoc99_scanf(ptr noundef, ...) #3

declare i32 @printf(ptr noundef, ...) #3

attributes #0 = { 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 #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { 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 #3 = { "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 #4 = { 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 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = !{!12, !12, i64 0}
!12 = !{!"double", !7, i64 0}
!13 = distinct !{!13, !10}
!14 = distinct !{!14, !10}


; 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"

@t = external dso_local global i32, align 4
@n = external dso_local global i32, align 4
@a = external dso_local global [10001 x i32], align 16
@b = external dso_local global [10001 x i32], align 16
@c = external dso_local global [10001 x i32], align 16
@.str = external hidden unnamed_addr constant [3 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [7 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [6 x i8], align 1

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef double @_Z4maxfd(double noundef) local_unnamed_addr #0

; Function Attrs: mustprogress norecurse nounwind uwtable
define dso_local noundef i32 @main() local_unnamed_addr #1 {
  %1 = tail call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull @t)
  %2 = load i32, ptr @t, align 4, !tbaa !5
  %3 = add nsw i32 %2, -1
  store i32 %3, ptr @t, align 4, !tbaa !5
  %.not24 = icmp eq i32 %2, 0
  br i1 %.not24, label %._crit_edge, label %.lr.ph25

.lr.ph25:                                         ; preds = %0, %23
  %4 = tail call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull @n)
  %5 = load i32, ptr @n, align 4, !tbaa !5
  %6 = icmp sgt i32 %5, 0
  br i1 %6, label %.lr.ph, label %.preheader.preheader

.lr.ph:                                           ; preds = %.lr.ph25, %.lr.ph
  %indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ 0, %.lr.ph25 ]
  %7 = getelementptr inbounds i32, ptr @a, i64 %indvars.iv
  %8 = getelementptr inbounds i32, ptr @b, i64 %indvars.iv
  %9 = getelementptr inbounds i32, ptr @c, i64 %indvars.iv
  %10 = tail call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.1, ptr noundef nonnull %7, ptr noundef nonnull %8, ptr noundef nonnull %9)
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %11 = load i32, ptr @n, align 4, !tbaa !5
  %12 = sext i32 %11 to i64
  %13 = icmp slt i64 %indvars.iv.next, %12
  br i1 %13, label %.lr.ph, label %.preheader.preheader, !llvm.loop !9

.preheader.preheader:                             ; preds = %.lr.ph, %.lr.ph25
  br label %.preheader

.preheader:                                       ; preds = %.preheader.preheader, %.preheader
  %14 = phi double [ %21, %.preheader ], [ 1.000000e+03, %.preheader.preheader ]
  %.01723 = phi double [ %.017., %.preheader ], [ 0.000000e+00, %.preheader.preheader ]
  %.01822 = phi double [ %..018, %.preheader ], [ 1.000000e+03, %.preheader.preheader ]
  %15 = fdiv double %14, 3.000000e+00
  %16 = fadd double %.01723, %15
  %17 = fsub double %.01822, %15
  %18 = tail call noundef double @_Z4maxfd(double noundef %16)
  %19 = tail call noundef double @_Z4maxfd(double noundef %17)
  %20 = fcmp olt double %18, %19
  %..018 = select i1 %20, double %17, double %.01822
  %.017. = select i1 %20, double %.01723, double %16
  %21 = fsub double %..018, %.017.
  %22 = fcmp ult double %21, 1.000000e-09
  br i1 %22, label %23, label %.preheader, !llvm.loop !11

23:                                               ; preds = %.preheader
  %24 = tail call noundef double @_Z4maxfd(double noundef %.017.)
  %25 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2, double noundef %24)
  %26 = load i32, ptr @t, align 4, !tbaa !5
  %27 = add nsw i32 %26, -1
  store i32 %27, ptr @t, align 4, !tbaa !5
  %.not = icmp eq i32 %26, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph25, !llvm.loop !12

._crit_edge:                                      ; preds = %23, %0
  ret i32 0
}

; Function Attrs: nofree nounwind
declare noundef i32 @__isoc99_scanf(ptr nocapture noundef readonly, ...) local_unnamed_addr #2

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #2

attributes #0 = { 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 #1 = { mustprogress norecurse 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 = { nofree 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" }

!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}
!10 = !{!"llvm.loop.mustprogress"}
!11 = distinct !{!11, !10}
!12 = distinct !{!12, !10}


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