; LLVM IR from VastoLorde95/Competitive-Programming :: SPOJ/DP Level 1/RENT/rent.ll (Z11compute_opti)

; 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"

@price = external dso_local global [10000 x i32], align 16
@q = external dso_local global [10000 x i32], align 16
@dp = external dso_local global [10000 x i64], align 16

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress uwtable
define dso_local noundef i64 @_Z11compute_opti(i32 noundef %0) #1 {
  %2 = alloca i64, align 8
  %3 = alloca i32, align 4
  %4 = alloca i64, align 8
  %5 = alloca i64, align 8
  store i32 %0, ptr %3, align 4, !tbaa !5
  %6 = load i32, ptr %3, align 4, !tbaa !5
  %7 = icmp eq i32 %6, -1
  br i1 %7, label %8, label %9

8:                                                ; preds = %1
  store i64 0, ptr %2, align 8
  br label %41

9:                                                ; preds = %1
  %10 = load i32, ptr %3, align 4, !tbaa !5
  %11 = sext i32 %10 to i64
  %12 = getelementptr inbounds [10000 x i64], ptr @dp, i64 0, i64 %11
  %13 = load i64, ptr %12, align 8, !tbaa !9
  %14 = icmp eq i64 %13, -1
  br i1 %14, label %15, label %35

15:                                               ; preds = %9
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #3
  %16 = load i32, ptr %3, align 4, !tbaa !5
  %17 = sext i32 %16 to i64
  %18 = getelementptr inbounds [10000 x i32], ptr @price, i64 0, i64 %17
  %19 = load i32, ptr %18, align 4, !tbaa !5
  %20 = sext i32 %19 to i64
  %21 = load i32, ptr %3, align 4, !tbaa !5
  %22 = sext i32 %21 to i64
  %23 = getelementptr inbounds [10000 x i32], ptr @q, i64 0, i64 %22
  %24 = load i32, ptr %23, align 4, !tbaa !5
  %25 = call noundef i64 @_Z11compute_opti(i32 noundef %24)
  %26 = add nsw i64 %20, %25
  store i64 %26, ptr %4, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #3
  %27 = load i32, ptr %3, align 4, !tbaa !5
  %28 = sub nsw i32 %27, 1
  %29 = call noundef i64 @_Z11compute_opti(i32 noundef %28)
  store i64 %29, ptr %5, align 8, !tbaa !9
  %30 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZSt3maxIxERKT_S2_S2_(ptr noundef nonnull align 8 dereferenceable(8) %4, ptr noundef nonnull align 8 dereferenceable(8) %5)
  %31 = load i64, ptr %30, align 8, !tbaa !9
  %32 = load i32, ptr %3, align 4, !tbaa !5
  %33 = sext i32 %32 to i64
  %34 = getelementptr inbounds [10000 x i64], ptr @dp, i64 0, i64 %33
  store i64 %31, ptr %34, align 8, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #3
  br label %35

35:                                               ; preds = %15, %9
  br label %36

36:                                               ; preds = %35
  %37 = load i32, ptr %3, align 4, !tbaa !5
  %38 = sext i32 %37 to i64
  %39 = getelementptr inbounds [10000 x i64], ptr @dp, i64 0, i64 %38
  %40 = load i64, ptr %39, align 8, !tbaa !9
  store i64 %40, ptr %2, align 8
  br label %41

41:                                               ; preds = %36, %8
  %42 = load i64, ptr %2, align 8
  ret i64 %42
}

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZSt3maxIxERKT_S2_S2_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) #2

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #2 = { inlinehint 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 #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 long", !7, i64 0}


; 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"

@price = external dso_local local_unnamed_addr global [10000 x i32], align 16
@q = external dso_local local_unnamed_addr global [10000 x i32], align 16
@dp = external dso_local local_unnamed_addr global [10000 x i64], align 16

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i64 @_Z11compute_opti(i32 noundef %0) local_unnamed_addr #1 {
  %2 = alloca i64, align 8
  %3 = alloca i64, align 8
  %4 = icmp eq i32 %0, -1
  br i1 %4, label %common.ret, label %5

5:                                                ; preds = %1
  %6 = sext i32 %0 to i64
  %7 = getelementptr inbounds [10000 x i64], ptr @dp, i64 0, i64 %6
  %8 = load i64, ptr %7, align 8, !tbaa !5
  %9 = icmp eq i64 %8, -1
  br i1 %9, label %10, label %common.ret

common.ret:                                       ; preds = %1, %5, %10
  %common.ret.op = phi i64 [ %21, %10 ], [ 0, %1 ], [ %8, %5 ]
  ret i64 %common.ret.op

10:                                               ; preds = %5
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #3
  %11 = getelementptr inbounds [10000 x i32], ptr @price, i64 0, i64 %6
  %12 = load i32, ptr %11, align 4, !tbaa !9
  %13 = sext i32 %12 to i64
  %14 = getelementptr inbounds [10000 x i32], ptr @q, i64 0, i64 %6
  %15 = load i32, ptr %14, align 4, !tbaa !9
  %16 = tail call noundef i64 @_Z11compute_opti(i32 noundef %15)
  %17 = add nsw i64 %16, %13
  store i64 %17, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #3
  %18 = add nsw i32 %0, -1
  %19 = tail call noundef i64 @_Z11compute_opti(i32 noundef %18)
  store i64 %19, ptr %3, align 8, !tbaa !5
  %20 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZSt3maxIxERKT_S2_S2_(ptr noundef nonnull align 8 dereferenceable(8) %2, ptr noundef nonnull align 8 dereferenceable(8) %3)
  %21 = load i64, ptr %20, align 8, !tbaa !5
  store i64 %21, ptr %7, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #3
  br label %common.ret
}

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZSt3maxIxERKT_S2_S2_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #2

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #2 = { inlinehint 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 #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 = !{!"long long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass