; LLVM IR from hpcg-benchmark/hpcg :: src/MixedBaseCounter.ll (ZN16MixedBaseCounter4nextEv)

; 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"

%class.MixedBaseCounter = type { i32, [33 x i32], [33 x i32] }

; 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 nounwind uwtable
define dso_local void @_ZN16MixedBaseCounter4nextEv(ptr noundef nonnull align 4 dereferenceable(268) %0) #1 align 2 {
  %2 = alloca ptr, align 8
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  store ptr %0, ptr %2, align 8, !tbaa !5
  %5 = load ptr, ptr %2, align 8
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #2
  store i32 0, ptr %3, align 4, !tbaa !9
  br label %6

6:                                                ; preds = %36, %1
  %7 = load i32, ptr %3, align 4, !tbaa !9
  %8 = getelementptr inbounds %class.MixedBaseCounter, ptr %5, i32 0, i32 0
  %9 = load i32, ptr %8, align 4, !tbaa !11
  %10 = icmp slt i32 %7, %9
  br i1 %10, label %12, label %11

11:                                               ; preds = %6
  store i32 2, ptr %4, align 4
  br label %39

12:                                               ; preds = %6
  %13 = getelementptr inbounds %class.MixedBaseCounter, ptr %5, i32 0, i32 2
  %14 = load i32, ptr %3, align 4, !tbaa !9
  %15 = sext i32 %14 to i64
  %16 = getelementptr inbounds [33 x i32], ptr %13, i64 0, i64 %15
  %17 = load i32, ptr %16, align 4, !tbaa !9
  %18 = add nsw i32 %17, 1
  store i32 %18, ptr %16, align 4, !tbaa !9
  %19 = getelementptr inbounds %class.MixedBaseCounter, ptr %5, i32 0, i32 2
  %20 = load i32, ptr %3, align 4, !tbaa !9
  %21 = sext i32 %20 to i64
  %22 = getelementptr inbounds [33 x i32], ptr %19, i64 0, i64 %21
  %23 = load i32, ptr %22, align 4, !tbaa !9
  %24 = getelementptr inbounds %class.MixedBaseCounter, ptr %5, i32 0, i32 1
  %25 = load i32, ptr %3, align 4, !tbaa !9
  %26 = sext i32 %25 to i64
  %27 = getelementptr inbounds [33 x i32], ptr %24, i64 0, i64 %26
  %28 = load i32, ptr %27, align 4, !tbaa !9
  %29 = icmp sgt i32 %23, %28
  br i1 %29, label %30, label %35

30:                                               ; preds = %12
  %31 = getelementptr inbounds %class.MixedBaseCounter, ptr %5, i32 0, i32 2
  %32 = load i32, ptr %3, align 4, !tbaa !9
  %33 = sext i32 %32 to i64
  %34 = getelementptr inbounds [33 x i32], ptr %31, i64 0, i64 %33
  store i32 0, ptr %34, align 4, !tbaa !9
  br label %36

35:                                               ; preds = %12
  store i32 2, ptr %4, align 4
  br label %39

36:                                               ; preds = %30
  %37 = load i32, ptr %3, align 4, !tbaa !9
  %38 = add nsw i32 %37, 1
  store i32 %38, ptr %3, align 4, !tbaa !9
  br label %6, !llvm.loop !13

39:                                               ; preds = %35, %11
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #2
  br label %40

40:                                               ; preds = %39
  ret void
}

attributes #0 = { 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 = { 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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !10, i64 0}
!12 = !{!"_ZTS16MixedBaseCounter", !10, i64 0, !7, i64 4, !7, i64 136}
!13 = distinct !{!13, !14}
!14 = !{!"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 memory(argmem: readwrite) uwtable
define dso_local void @_ZN16MixedBaseCounter4nextEv(ptr nocapture noundef nonnull align 4 dereferenceable(268) %0) local_unnamed_addr #0 align 2 {
  %2 = getelementptr inbounds i8, ptr %0, i64 136
  %3 = load i32, ptr %0, align 4, !tbaa !5
  %4 = icmp sgt i32 %3, 0
  br i1 %4, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %1
  %5 = getelementptr inbounds i8, ptr %0, i64 4
  %wide.trip.count = zext nneg i32 %3 to i64
  br label %6

6:                                                ; preds = %.lr.ph, %12
  %indvars.iv = phi i64 [ 0, %.lr.ph ], [ %indvars.iv.next, %12 ]
  %7 = getelementptr inbounds [33 x i32], ptr %2, i64 0, i64 %indvars.iv
  %8 = load i32, ptr %7, align 4, !tbaa !10
  %9 = add nsw i32 %8, 1
  store i32 %9, ptr %7, align 4, !tbaa !10
  %10 = getelementptr inbounds [33 x i32], ptr %5, i64 0, i64 %indvars.iv
  %11 = load i32, ptr %10, align 4, !tbaa !10
  %.not = icmp slt i32 %8, %11
  br i1 %.not, label %._crit_edge, label %12

12:                                               ; preds = %6
  store i32 0, ptr %7, align 4, !tbaa !10
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next, %wide.trip.count
  br i1 %exitcond.not, label %._crit_edge, label %6, !llvm.loop !11

._crit_edge:                                      ; preds = %12, %6, %1
  ret void
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind memory(argmem: readwrite) 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, !7, i64 0}
!6 = !{!"_ZTS16MixedBaseCounter", !7, i64 0, !8, i64 4, !8, i64 136}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!7, !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass