; LLVM IR from ravireddy07/cpp-book :: src/Code-Chef (CHEFRP)

; 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"

@.str = external hidden unnamed_addr constant [4 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [5 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [3 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 i64, align 8
  %4 = alloca i64, align 8
  %5 = alloca i64, align 8
  %6 = alloca i64, align 8
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #3
  %7 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %2)
  br label %8

8:                                                ; preds = %43, %0
  %9 = load i32, ptr %2, align 4, !tbaa !5
  %10 = add nsw i32 %9, -1
  store i32 %10, ptr %2, align 4, !tbaa !5
  %11 = icmp ne i32 %9, 0
  br i1 %11, label %12, label %44

12:                                               ; preds = %8
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #3
  %13 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.1, ptr noundef %3)
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #3
  store i64 0, ptr %4, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #3
  store i64 1000000, ptr %5, align 8, !tbaa !9
  br label %14

14:                                               ; preds = %30, %12
  %15 = load i64, ptr %3, align 8, !tbaa !9
  %16 = add nsw i64 %15, -1
  store i64 %16, ptr %3, align 8, !tbaa !9
  %17 = icmp ne i64 %15, 0
  br i1 %17, label %18, label %32

18:                                               ; preds = %14
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #3
  %19 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.1, ptr noundef %6)
  %20 = load i64, ptr %6, align 8, !tbaa !9
  %21 = load i64, ptr %4, align 8, !tbaa !9
  %22 = add nsw i64 %21, %20
  store i64 %22, ptr %4, align 8, !tbaa !9
  %23 = load i64, ptr %6, align 8, !tbaa !9
  %24 = load i64, ptr %5, align 8, !tbaa !9
  %25 = icmp slt i64 %23, %24
  br i1 %25, label %26, label %28

26:                                               ; preds = %18
  %27 = load i64, ptr %6, align 8, !tbaa !9
  br label %30

28:                                               ; preds = %18
  %29 = load i64, ptr %5, align 8, !tbaa !9
  br label %30

30:                                               ; preds = %28, %26
  %31 = phi i64 [ %27, %26 ], [ %29, %28 ]
  store i64 %31, ptr %5, align 8, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  br label %14, !llvm.loop !11

32:                                               ; preds = %14
  %33 = load i64, ptr %5, align 8, !tbaa !9
  %34 = icmp slt i64 %33, 2
  br i1 %34, label %35, label %37

35:                                               ; preds = %32
  %36 = call i32 @puts(ptr noundef @.str.2)
  br label %43

37:                                               ; preds = %32
  %38 = load i64, ptr %4, align 8, !tbaa !9
  %39 = load i64, ptr %5, align 8, !tbaa !9
  %40 = sub nsw i64 %38, %39
  %41 = add nsw i64 %40, 2
  %42 = call i32 (ptr, ...) @printf(ptr noundef @.str.1, i64 noundef %41)
  br label %43

43:                                               ; preds = %37, %35
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #3
  br label %8, !llvm.loop !13

44:                                               ; preds = %8
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #3
  ret i32 0
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

declare i32 @__isoc99_scanf(ptr noundef, ...) #2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

declare i32 @puts(ptr noundef) #2

declare i32 @printf(ptr noundef, ...) #2

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 nosync nounwind willreturn memory(argmem: readwrite) }
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 = { 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 = !{!10, !10, i64 0}
!10 = !{!"long", !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"

@.str = external hidden unnamed_addr constant [4 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [5 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [3 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
  %2 = alloca i64, align 8
  %3 = alloca i64, align 8
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %1) #4
  %4 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %1)
  %5 = load i32, ptr %1, align 4, !tbaa !5
  %6 = add nsw i32 %5, -1
  store i32 %6, ptr %1, align 4, !tbaa !5
  %.not12 = icmp eq i32 %5, 0
  br i1 %.not12, label %._crit_edge15, label %.lr.ph14

.lr.ph14:                                         ; preds = %0, %22
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #4
  %7 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.1, ptr noundef nonnull %2)
  %8 = load i64, ptr %2, align 8, !tbaa !9
  %9 = add nsw i64 %8, -1
  store i64 %9, ptr %2, align 8, !tbaa !9
  %.not78 = icmp eq i64 %8, 0
  br i1 %.not78, label %._crit_edge.thread, label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph14, %.lr.ph
  %.010 = phi i64 [ %13, %.lr.ph ], [ 1000000, %.lr.ph14 ]
  %.069 = phi i64 [ %12, %.lr.ph ], [ 0, %.lr.ph14 ]
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #4
  %10 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.1, ptr noundef nonnull %3)
  %11 = load i64, ptr %3, align 8
  %12 = add nsw i64 %11, %.069
  %13 = call i64 @llvm.smin.i64(i64 %11, i64 %.010)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #4
  %14 = load i64, ptr %2, align 8, !tbaa !9
  %15 = add nsw i64 %14, -1
  store i64 %15, ptr %2, align 8, !tbaa !9
  %.not7 = icmp eq i64 %14, 0
  br i1 %.not7, label %._crit_edge, label %.lr.ph, !llvm.loop !11

._crit_edge:                                      ; preds = %.lr.ph
  %16 = icmp slt i64 %13, 2
  br i1 %16, label %17, label %._crit_edge.thread

17:                                               ; preds = %._crit_edge
  %18 = call i32 @puts(ptr noundef nonnull dereferenceable(1) @.str.2)
  br label %22

._crit_edge.thread:                               ; preds = %.lr.ph14, %._crit_edge
  %.0.lcssa20 = phi i64 [ %13, %._crit_edge ], [ 1000000, %.lr.ph14 ]
  %.06.lcssa19 = phi i64 [ %12, %._crit_edge ], [ 0, %.lr.ph14 ]
  %19 = add i64 %.06.lcssa19, 2
  %20 = sub i64 %19, %.0.lcssa20
  %21 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i64 noundef %20)
  br label %22

22:                                               ; preds = %._crit_edge.thread, %17
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #4
  %23 = load i32, ptr %1, align 4, !tbaa !5
  %24 = add nsw i32 %23, -1
  store i32 %24, ptr %1, align 4, !tbaa !5
  %.not = icmp eq i32 %23, 0
  br i1 %.not, label %._crit_edge15, label %.lr.ph14, !llvm.loop !13

._crit_edge15:                                    ; preds = %22, %0
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %1) #4
  ret i32 0
}

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

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

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

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

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

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i64 @llvm.smin.i64(i64, i64) #3

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 nosync nounwind willreturn memory(argmem: readwrite) }
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" }
attributes #3 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
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 = !{!10, !10, i64 0}
!10 = !{!"long", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = distinct !{!13, !12}


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