; LLVM IR from tangjz/acm-icpc :: projecteuler (81)

; 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"

@f = external dso_local global [81 x i32], align 16
@.str = external hidden unnamed_addr constant [6 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [4 x i8], align 1

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() #0 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  store i32 0, ptr %1, align 4
  call void @llvm.memset.p0.i64(ptr align 16 @f, i8 63, i64 324, i1 false)
  store i32 0, ptr @f, align 16, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #4
  store i32 0, ptr %2, align 4, !tbaa !5
  br label %6

6:                                                ; preds = %50, %0
  %7 = load i32, ptr %2, align 4, !tbaa !5
  %8 = icmp slt i32 %7, 80
  br i1 %8, label %10, label %9

9:                                                ; preds = %6
  store i32 2, ptr %3, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #4
  br label %53

10:                                               ; preds = %6
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #4
  store i32 0, ptr %4, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #4
  br label %11

11:                                               ; preds = %46, %10
  %12 = load i32, ptr %4, align 4, !tbaa !5
  %13 = icmp slt i32 %12, 80
  br i1 %13, label %15, label %14

14:                                               ; preds = %11
  store i32 5, ptr %3, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #4
  br label %49

15:                                               ; preds = %11
  %16 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %5)
  %17 = load i32, ptr %4, align 4, !tbaa !5
  %18 = icmp ne i32 %17, 0
  br i1 %18, label %19, label %39

19:                                               ; preds = %15
  %20 = load i32, ptr %4, align 4, !tbaa !5
  %21 = sub nsw i32 %20, 1
  %22 = sext i32 %21 to i64
  %23 = getelementptr inbounds [81 x i32], ptr @f, i64 0, i64 %22
  %24 = load i32, ptr %23, align 4, !tbaa !5
  %25 = load i32, ptr %4, align 4, !tbaa !5
  %26 = sext i32 %25 to i64
  %27 = getelementptr inbounds [81 x i32], ptr @f, i64 0, i64 %26
  %28 = load i32, ptr %27, align 4, !tbaa !5
  %29 = icmp slt i32 %24, %28
  br i1 %29, label %30, label %39

30:                                               ; preds = %19
  %31 = load i32, ptr %4, align 4, !tbaa !5
  %32 = sub nsw i32 %31, 1
  %33 = sext i32 %32 to i64
  %34 = getelementptr inbounds [81 x i32], ptr @f, i64 0, i64 %33
  %35 = load i32, ptr %34, align 4, !tbaa !5
  %36 = load i32, ptr %4, align 4, !tbaa !5
  %37 = sext i32 %36 to i64
  %38 = getelementptr inbounds [81 x i32], ptr @f, i64 0, i64 %37
  store i32 %35, ptr %38, align 4, !tbaa !5
  br label %39

39:                                               ; preds = %30, %19, %15
  %40 = load i32, ptr %5, align 4, !tbaa !5
  %41 = load i32, ptr %4, align 4, !tbaa !5
  %42 = sext i32 %41 to i64
  %43 = getelementptr inbounds [81 x i32], ptr @f, i64 0, i64 %42
  %44 = load i32, ptr %43, align 4, !tbaa !5
  %45 = add nsw i32 %44, %40
  store i32 %45, ptr %43, align 4, !tbaa !5
  br label %46

46:                                               ; preds = %39
  %47 = load i32, ptr %4, align 4, !tbaa !5
  %48 = add nsw i32 %47, 1
  store i32 %48, ptr %4, align 4, !tbaa !5
  br label %11, !llvm.loop !9

49:                                               ; preds = %14
  br label %50

50:                                               ; preds = %49
  %51 = load i32, ptr %2, align 4, !tbaa !5
  %52 = add nsw i32 %51, 1
  store i32 %52, ptr %2, align 4, !tbaa !5
  br label %6, !llvm.loop !11

53:                                               ; preds = %9
  %54 = load i32, ptr getelementptr inbounds ([81 x i32], ptr @f, i64 0, i64 79), align 4, !tbaa !5
  %55 = call i32 (ptr, ...) @printf(ptr noundef @.str.1, i32 noundef %54)
  ret i32 0
}

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #2

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

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #2

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

attributes #0 = { 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 #1 = { nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #2 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = distinct !{!11, !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"

@f = external dso_local local_unnamed_addr global [81 x i32], align 16
@.str = external hidden unnamed_addr constant [6 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [4 x i8], align 1

; Function Attrs: mustprogress nofree norecurse nounwind uwtable
define dso_local noundef i32 @main() local_unnamed_addr #0 {
  %1 = alloca i32, align 4
  tail call void @llvm.memset.p0.i64(ptr noundef nonnull align 16 dereferenceable(324) @f, i8 63, i64 324, i1 false)
  store i32 0, ptr @f, align 16, !tbaa !5
  br label %.peel.next

2:                                                ; preds = %.loopexit
  %3 = load i32, ptr getelementptr inbounds (i8, ptr @f, i64 316), align 4, !tbaa !5
  %4 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i32 noundef %3)
  ret i32 0

.peel.next:                                       ; preds = %.loopexit, %0
  %.01013 = phi i32 [ 0, %0 ], [ %8, %.loopexit ]
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %1) #5
  %5 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %1)
  %.pre = load i32, ptr @f, align 16, !tbaa !5
  %6 = load i32, ptr %1, align 4, !tbaa !5
  %7 = add nsw i32 %.pre, %6
  store i32 %7, ptr @f, align 16, !tbaa !5
  br label %9

.loopexit:                                        ; preds = %9
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %1) #5
  %8 = add nuw nsw i32 %.01013, 1
  %exitcond16.not = icmp eq i32 %8, 80
  br i1 %exitcond16.not, label %2, label %.peel.next, !llvm.loop !9

9:                                                ; preds = %9, %.peel.next
  %indvars.iv = phi i64 [ 1, %.peel.next ], [ %indvars.iv.next, %9 ]
  %10 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %1)
  %11 = add nsw i64 %indvars.iv, -1
  %12 = getelementptr inbounds [81 x i32], ptr @f, i64 0, i64 %11
  %13 = load i32, ptr %12, align 4, !tbaa !5
  %14 = getelementptr inbounds [81 x i32], ptr @f, i64 0, i64 %indvars.iv
  %15 = load i32, ptr %14, align 4, !tbaa !5
  %spec.select = call i32 @llvm.smin.i32(i32 %13, i32 %15)
  %16 = load i32, ptr %1, align 4, !tbaa !5
  %17 = getelementptr inbounds [81 x i32], ptr @f, i64 0, i64 %indvars.iv
  %18 = add nsw i32 %spec.select, %16
  store i32 %18, ptr %17, align 4, !tbaa !5
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next, 80
  br i1 %exitcond.not, label %.loopexit, label %9, !llvm.loop !11
}

; Function Attrs: mustprogress nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #1

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #2

; Function Attrs: nofree nounwind
declare noundef i32 @__isoc99_scanf(ptr nocapture noundef readonly, ...) local_unnamed_addr #3

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #2

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #3

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i32 @llvm.smin.i32(i32, i32) #4

attributes #0 = { mustprogress nofree 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 #1 = { mustprogress nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #2 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #3 = { 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" }
attributes #4 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
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 = !{!"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}
!12 = !{!"llvm.loop.peeled.count", i32 1}


; Effective O3 passes: BDCEPass,CorrelatedValuePropagationPass,DSEPass,EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferAlignmentPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopFullUnrollPass,LoopRotatePass,PostOrderFunctionAttrsPass,SCCPPass,SROAPass,SimplifyCFGPass,TailCallElimPass