; LLVM IR from DimitrisJim/leetcode_solutions :: C/Algorithms (1103)

; 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"

; 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: nounwind uwtable
define dso_local i64 @sum_until_k(i32 noundef %0, i32 noundef %1) #1 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i64, align 8
  %6 = alloca i32, align 4
  store i32 %0, ptr %3, align 4, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #2
  store i64 0, ptr %5, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #2
  store i32 1, ptr %6, align 4, !tbaa !5
  br label %7

7:                                                ; preds = %29, %2
  %8 = load i32, ptr %6, align 4, !tbaa !5
  %9 = load i32, ptr %4, align 4, !tbaa !5
  %10 = add nsw i32 %9, 1
  %11 = icmp slt i32 %8, %10
  br i1 %11, label %13, label %12

12:                                               ; preds = %7
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  br label %32

13:                                               ; preds = %7
  %14 = load i32, ptr %3, align 4, !tbaa !5
  %15 = add nsw i32 %14, 1
  %16 = load i32, ptr %6, align 4, !tbaa !5
  %17 = mul nsw i32 %15, %16
  %18 = load i32, ptr %3, align 4, !tbaa !5
  %19 = load i32, ptr %3, align 4, !tbaa !5
  %20 = add nsw i32 %19, 1
  %21 = mul nsw i32 %18, %20
  %22 = ashr i32 %21, 1
  %23 = load i32, ptr %4, align 4, !tbaa !5
  %24 = mul nsw i32 %22, %23
  %25 = add nsw i32 %17, %24
  %26 = sext i32 %25 to i64
  %27 = load i64, ptr %5, align 8, !tbaa !9
  %28 = add nsw i64 %27, %26
  store i64 %28, ptr %5, align 8, !tbaa !9
  br label %29

29:                                               ; preds = %13
  %30 = load i32, ptr %6, align 4, !tbaa !5
  %31 = add nsw i32 %30, 1
  store i32 %31, ptr %6, align 4, !tbaa !5
  br label %7, !llvm.loop !11

32:                                               ; preds = %12
  %33 = load i64, ptr %5, align 8, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #2
  ret i64 %33
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 = { 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/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"long", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}


; 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"

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(none) uwtable
define dso_local i64 @sum_until_k(i32 noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %.not11 = icmp slt i32 %1, 1
  br i1 %.not11, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %2
  %3 = add i32 %0, 1
  %4 = mul nsw i32 %3, %0
  %5 = ashr i32 %4, 1
  %6 = mul i32 %5, %1
  %7 = sext i32 %3 to i64
  %8 = sext i32 %6 to i64
  %9 = add nsw i32 %1, -1
  %10 = zext nneg i32 %9 to i64
  %11 = add nsw i32 %1, -2
  %12 = zext i32 %11 to i64
  %13 = mul nuw nsw i64 %10, %12
  %14 = lshr i64 %13, 1
  %15 = add nuw nsw i64 %14, 1
  %16 = mul i64 %15, %7
  %17 = shl nsw i64 %7, 1
  %18 = add nsw i64 %17, %8
  %19 = zext nneg i32 %9 to i64
  %20 = mul i64 %18, %19
  %21 = add i64 %16, %20
  %22 = add i64 %21, %8
  br label %._crit_edge

._crit_edge:                                      ; preds = %.lr.ph, %2
  %.010.lcssa = phi i64 [ 0, %2 ], [ %22, %.lr.ph ]
  ret i64 %.010.lcssa
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(none) 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)"}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,LCSSAPass,LICMPass,LoopRotatePass,LoopSimplifyPass,PostOrderFunctionAttrsPass,ReassociatePass,SCCPPass,SROAPass,SimplifyCFGPass