; LLVM IR from pranjalwalia/Competitive-programming :: spoj/RMQSQ.ll (Z9Build_sumiii)

; 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"

@a = external dso_local global [100000 x i32], align 16
@st = external dso_local global [400000 x i32], 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 void @_Z9Build_sumiii(i32 noundef %0, i32 noundef %1, i32 noundef %2) #1 {
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  store i32 %0, ptr %4, align 4, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !5
  store i32 %2, ptr %6, align 4, !tbaa !5
  %8 = load i32, ptr %5, align 4, !tbaa !5
  %9 = load i32, ptr %6, align 4, !tbaa !5
  %10 = icmp eq i32 %8, %9
  br i1 %10, label %11, label %19

11:                                               ; preds = %3
  %12 = load i32, ptr %5, align 4, !tbaa !5
  %13 = sext i32 %12 to i64
  %14 = getelementptr inbounds [100000 x i32], ptr @a, i64 0, i64 %13
  %15 = load i32, ptr %14, align 4, !tbaa !5
  %16 = load i32, ptr %4, align 4, !tbaa !5
  %17 = sext i32 %16 to i64
  %18 = getelementptr inbounds [400000 x i32], ptr @st, i64 0, i64 %17
  store i32 %15, ptr %18, align 4, !tbaa !5
  br label %51

19:                                               ; preds = %3
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #2
  %20 = load i32, ptr %5, align 4, !tbaa !5
  %21 = load i32, ptr %6, align 4, !tbaa !5
  %22 = add nsw i32 %20, %21
  %23 = sdiv i32 %22, 2
  store i32 %23, ptr %7, align 4, !tbaa !5
  %24 = load i32, ptr %4, align 4, !tbaa !5
  %25 = mul nsw i32 %24, 2
  %26 = add nsw i32 %25, 1
  %27 = load i32, ptr %5, align 4, !tbaa !5
  %28 = load i32, ptr %7, align 4, !tbaa !5
  call void @_Z9Build_sumiii(i32 noundef %26, i32 noundef %27, i32 noundef %28)
  %29 = load i32, ptr %4, align 4, !tbaa !5
  %30 = mul nsw i32 %29, 2
  %31 = add nsw i32 %30, 2
  %32 = load i32, ptr %7, align 4, !tbaa !5
  %33 = add nsw i32 %32, 1
  %34 = load i32, ptr %6, align 4, !tbaa !5
  call void @_Z9Build_sumiii(i32 noundef %31, i32 noundef %33, i32 noundef %34)
  %35 = load i32, ptr %4, align 4, !tbaa !5
  %36 = mul nsw i32 %35, 2
  %37 = add nsw i32 %36, 1
  %38 = sext i32 %37 to i64
  %39 = getelementptr inbounds [400000 x i32], ptr @st, i64 0, i64 %38
  %40 = load i32, ptr %39, align 4, !tbaa !5
  %41 = load i32, ptr %4, align 4, !tbaa !5
  %42 = mul nsw i32 %41, 2
  %43 = add nsw i32 %42, 2
  %44 = sext i32 %43 to i64
  %45 = getelementptr inbounds [400000 x i32], ptr @st, i64 0, i64 %44
  %46 = load i32, ptr %45, align 4, !tbaa !5
  %47 = add nsw i32 %40, %46
  %48 = load i32, ptr %4, align 4, !tbaa !5
  %49 = sext i32 %48 to i64
  %50 = getelementptr inbounds [400000 x i32], ptr @st, i64 0, i64 %49
  store i32 %47, ptr %50, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #2
  br label %51

51:                                               ; preds = %19, %11
  ret void
}

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 = { 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"}


; 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"

@a = external dso_local local_unnamed_addr global [100000 x i32], align 16
@st = external dso_local local_unnamed_addr global [400000 x i32], align 16

; Function Attrs: mustprogress nofree nosync nounwind memory(readwrite, argmem: none, inaccessiblemem: none) uwtable
define dso_local void @_Z9Build_sumiii(i32 noundef %0, i32 noundef %1, i32 noundef %2) local_unnamed_addr #0 {
  %4 = icmp eq i32 %1, %2
  br i1 %4, label %5, label %11

5:                                                ; preds = %3
  %6 = sext i32 %1 to i64
  %7 = getelementptr inbounds [100000 x i32], ptr @a, i64 0, i64 %6
  %8 = load i32, ptr %7, align 4, !tbaa !5
  br label %common.ret

common.ret:                                       ; preds = %5, %11
  %.sink = phi i32 [ %8, %5 ], [ %24, %11 ]
  %9 = sext i32 %0 to i64
  %10 = getelementptr inbounds [400000 x i32], ptr @st, i64 0, i64 %9
  store i32 %.sink, ptr %10, align 4, !tbaa !5
  ret void

11:                                               ; preds = %3
  %12 = add nsw i32 %2, %1
  %13 = sdiv i32 %12, 2
  %14 = shl nsw i32 %0, 1
  %15 = or disjoint i32 %14, 1
  tail call void @_Z9Build_sumiii(i32 noundef %15, i32 noundef %1, i32 noundef %13)
  %16 = add nsw i32 %14, 2
  %17 = add nsw i32 %13, 1
  tail call void @_Z9Build_sumiii(i32 noundef %16, i32 noundef %17, i32 noundef %2)
  %18 = sext i32 %15 to i64
  %19 = getelementptr inbounds [400000 x i32], ptr @st, i64 0, i64 %18
  %20 = load i32, ptr %19, align 4, !tbaa !5
  %21 = sext i32 %16 to i64
  %22 = getelementptr inbounds [400000 x i32], ptr @st, i64 0, i64 %21
  %23 = load i32, ptr %22, align 8, !tbaa !5
  %24 = add nsw i32 %23, %20
  br label %common.ret
}

attributes #0 = { mustprogress nofree nosync nounwind memory(readwrite, argmem: none, inaccessiblemem: 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)"}
!5 = !{!6, !6, i64 0}
!6 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,InferAlignmentPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass