; LLVM IR from tangjz/acm-icpc :: Summer_Training/2016-07-17/I - Query - tjz.ll (Z3sumiii)

; 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"

@seg = external dso_local global [2000002 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: inlinehint mustprogress nounwind uwtable
declare dso_local noundef i32 @_Z7seg_idxii(i32 noundef, i32 noundef) #1

; 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 i32 @_Z3sumiii(i32 noundef %0, i32 noundef %1, i32 noundef %2) #2 {
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  %10 = alloca i32, align 4
  store i32 %0, ptr %5, align 4, !tbaa !5
  store i32 %1, ptr %6, align 4, !tbaa !5
  store i32 %2, ptr %7, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #3
  %11 = load i32, ptr %5, align 4, !tbaa !5
  %12 = load i32, ptr %6, align 4, !tbaa !5
  %13 = call noundef i32 @_Z7seg_idxii(i32 noundef %11, i32 noundef %12)
  store i32 %13, ptr %8, align 4, !tbaa !5
  %14 = load i32, ptr %6, align 4, !tbaa !5
  %15 = load i32, ptr %7, align 4, !tbaa !5
  %16 = icmp sle i32 %14, %15
  br i1 %16, label %17, label %22

17:                                               ; preds = %3
  %18 = load i32, ptr %8, align 4, !tbaa !5
  %19 = sext i32 %18 to i64
  %20 = getelementptr inbounds [2000002 x i32], ptr @seg, i64 0, i64 %19
  %21 = load i32, ptr %20, align 4, !tbaa !5
  store i32 %21, ptr %4, align 4
  store i32 1, ptr %9, align 4
  br label %49

22:                                               ; preds = %3
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #3
  %23 = load i32, ptr %5, align 4, !tbaa !5
  %24 = load i32, ptr %6, align 4, !tbaa !5
  %25 = add nsw i32 %23, %24
  %26 = ashr i32 %25, 1
  store i32 %26, ptr %10, align 4, !tbaa !5
  %27 = load i32, ptr %7, align 4, !tbaa !5
  %28 = load i32, ptr %10, align 4, !tbaa !5
  %29 = icmp sle i32 %27, %28
  br i1 %29, label %30, label %35

30:                                               ; preds = %22
  %31 = load i32, ptr %5, align 4, !tbaa !5
  %32 = load i32, ptr %10, align 4, !tbaa !5
  %33 = load i32, ptr %7, align 4, !tbaa !5
  %34 = call noundef i32 @_Z3sumiii(i32 noundef %31, i32 noundef %32, i32 noundef %33)
  store i32 %34, ptr %4, align 4
  store i32 1, ptr %9, align 4
  br label %48

35:                                               ; preds = %22
  %36 = load i32, ptr %5, align 4, !tbaa !5
  %37 = load i32, ptr %10, align 4, !tbaa !5
  %38 = call noundef i32 @_Z7seg_idxii(i32 noundef %36, i32 noundef %37)
  %39 = sext i32 %38 to i64
  %40 = getelementptr inbounds [2000002 x i32], ptr @seg, i64 0, i64 %39
  %41 = load i32, ptr %40, align 4, !tbaa !5
  %42 = load i32, ptr %10, align 4, !tbaa !5
  %43 = add nsw i32 %42, 1
  %44 = load i32, ptr %6, align 4, !tbaa !5
  %45 = load i32, ptr %7, align 4, !tbaa !5
  %46 = call noundef i32 @_Z3sumiii(i32 noundef %43, i32 noundef %44, i32 noundef %45)
  %47 = add nsw i32 %41, %46
  store i32 %47, ptr %4, align 4
  store i32 1, ptr %9, align 4
  br label %48

48:                                               ; preds = %35, %30
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #3
  br label %49

49:                                               ; preds = %48, %17
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #3
  %50 = load i32, ptr %4, align 4
  ret i32 %50
}

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


; 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"

@seg = external dso_local local_unnamed_addr global [2000002 x i32], align 16

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef i32 @_Z7seg_idxii(i32 noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i32 @_Z3sumiii(i32 noundef %0, i32 noundef %1, i32 noundef %2) local_unnamed_addr #1 {
  br label %tailrecurse.outer

tailrecurse.outer:                                ; preds = %12, %3
  %accumulator.tr.ph = phi i32 [ %18, %12 ], [ 0, %3 ]
  %.tr.ph = phi i32 [ %17, %12 ], [ %0, %3 ]
  %.tr23.ph = phi i32 [ %.tr23, %12 ], [ %1, %3 ]
  br label %tailrecurse

tailrecurse:                                      ; preds = %tailrecurse.outer, %9
  %.tr23 = phi i32 [ %11, %9 ], [ %.tr23.ph, %tailrecurse.outer ]
  %4 = tail call noundef i32 @_Z7seg_idxii(i32 noundef %.tr.ph, i32 noundef %.tr23)
  %.not = icmp sgt i32 %.tr23, %2
  br i1 %.not, label %9, label %5

5:                                                ; preds = %tailrecurse
  %6 = sext i32 %4 to i64
  %7 = getelementptr inbounds [2000002 x i32], ptr @seg, i64 0, i64 %6
  %8 = load i32, ptr %7, align 4, !tbaa !5
  %accumulator.ret.tr = add nsw i32 %8, %accumulator.tr.ph
  ret i32 %accumulator.ret.tr

9:                                                ; preds = %tailrecurse
  %10 = add nsw i32 %.tr23, %.tr.ph
  %11 = ashr i32 %10, 1
  %.not22 = icmp slt i32 %11, %2
  br i1 %.not22, label %12, label %tailrecurse

12:                                               ; preds = %9
  %13 = tail call noundef i32 @_Z7seg_idxii(i32 noundef %.tr.ph, i32 noundef %11)
  %14 = sext i32 %13 to i64
  %15 = getelementptr inbounds [2000002 x i32], ptr @seg, i64 0, i64 %14
  %16 = load i32, ptr %15, align 4, !tbaa !5
  %17 = add nsw i32 %11, 1
  %18 = add nsw i32 %16, %accumulator.tr.ph
  br label %tailrecurse.outer
}

attributes #0 = { 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 #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" }

!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: GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,LCSSAPass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass