; LLVM IR from jrouwe/JoltPhysics :: Jolt/Physics (LargeIslandSplitter)

; 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.JPH::LargeIslandSplitter" = type <{ i32, [4 x i8], ptr, ptr, ptr, i32, %"struct.std::atomic.0", i32, [4 x i8], ptr, %"struct.std::atomic.0", [4 x i8] }>
%"struct.std::atomic.0" = type { %"struct.std::__atomic_base.1" }
%"struct.std::__atomic_base.1" = type { i32 }
%"class.JPH::LargeIslandSplitter::Splits" = type <{ [32 x %"struct.JPH::LargeIslandSplitter::Split"], i32, i32, i32, i32, i32, [4 x i8], %"struct.std::atomic", %"struct.std::atomic.0", [4 x i8] }>
%"struct.JPH::LargeIslandSplitter::Split" = type { i32, i32, i32, i32 }
%"struct.std::atomic" = type { %"struct.std::__atomic_base" }
%"struct.std::__atomic_base" = type { i64 }

; 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: inlinehint mustprogress nounwind uwtable
declare dso_local void @_ZN3JPH19LargeIslandSplitter6Splits15StartFirstBatchEv(ptr noundef nonnull align 8 dereferenceable(548)) #1 align 2

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN3JPH19LargeIslandSplitter24PrepareForSolvePositionsEv(ptr noundef nonnull align 8 dereferenceable(60) %0) #2 align 2 {
  %2 = alloca ptr, align 8
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  %5 = load ptr, ptr %2, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #3
  %6 = getelementptr inbounds %"class.JPH::LargeIslandSplitter", ptr %5, i32 0, i32 9
  %7 = load ptr, ptr %6, align 8, !tbaa !9
  store ptr %7, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #3
  %8 = getelementptr inbounds %"class.JPH::LargeIslandSplitter", ptr %5, i32 0, i32 9
  %9 = load ptr, ptr %8, align 8, !tbaa !9
  %10 = getelementptr inbounds %"class.JPH::LargeIslandSplitter", ptr %5, i32 0, i32 7
  %11 = load i32, ptr %10, align 8, !tbaa !14
  %12 = zext i32 %11 to i64
  %13 = getelementptr inbounds %"class.JPH::LargeIslandSplitter::Splits", ptr %9, i64 %12
  store ptr %13, ptr %4, align 8, !tbaa !5
  br label %14

14:                                               ; preds = %26, %1
  %15 = load ptr, ptr %3, align 8, !tbaa !5
  %16 = load ptr, ptr %4, align 8, !tbaa !5
  %17 = icmp ult ptr %15, %16
  br i1 %17, label %19, label %18

18:                                               ; preds = %14
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #3
  br label %29

19:                                               ; preds = %14
  %20 = load ptr, ptr %3, align 8, !tbaa !5
  %21 = getelementptr inbounds %"class.JPH::LargeIslandSplitter::Splits", ptr %20, i32 0, i32 5
  %22 = load i32, ptr %21, align 8, !tbaa !15
  %23 = load ptr, ptr %3, align 8, !tbaa !5
  %24 = getelementptr inbounds %"class.JPH::LargeIslandSplitter::Splits", ptr %23, i32 0, i32 3
  store i32 %22, ptr %24, align 8, !tbaa !20
  %25 = load ptr, ptr %3, align 8, !tbaa !5
  call void @_ZN3JPH19LargeIslandSplitter6Splits15StartFirstBatchEv(ptr noundef nonnull align 8 dereferenceable(548) %25)
  br label %26

26:                                               ; preds = %19
  %27 = load ptr, ptr %3, align 8, !tbaa !5
  %28 = getelementptr inbounds %"class.JPH::LargeIslandSplitter::Splits", ptr %27, i32 1
  store ptr %28, ptr %3, align 8, !tbaa !5
  br label %14, !llvm.loop !21

29:                                               ; preds = %18
  ret void
}

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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !6, i64 48}
!10 = !{!"_ZTSN3JPH19LargeIslandSplitterE", !11, i64 0, !6, i64 8, !6, i64 16, !6, i64 24, !11, i64 32, !12, i64 36, !11, i64 40, !6, i64 48, !12, i64 56}
!11 = !{!"int", !7, i64 0}
!12 = !{!"_ZTSSt6atomicIjE", !13, i64 0}
!13 = !{!"_ZTSSt13__atomic_baseIjE", !11, i64 0}
!14 = !{!10, !11, i64 40}
!15 = !{!16, !11, i64 528}
!16 = !{!"_ZTSN3JPH19LargeIslandSplitter6SplitsE", !7, i64 0, !11, i64 512, !11, i64 516, !11, i64 520, !11, i64 524, !11, i64 528, !17, i64 536, !12, i64 544}
!17 = !{!"_ZTSSt6atomicImE", !18, i64 0}
!18 = !{!"_ZTSSt13__atomic_baseImE", !19, i64 0}
!19 = !{!"long", !7, i64 0}
!20 = !{!16, !11, i64 520}
!21 = distinct !{!21, !22}
!22 = !{!"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"

%"class.JPH::LargeIslandSplitter::Splits" = type <{ [32 x %"struct.JPH::LargeIslandSplitter::Split"], i32, i32, i32, i32, i32, [4 x i8], %"struct.std::atomic", %"struct.std::atomic.0", [4 x i8] }>
%"struct.JPH::LargeIslandSplitter::Split" = type { i32, i32, i32, i32 }
%"struct.std::atomic" = type { %"struct.std::__atomic_base" }
%"struct.std::__atomic_base" = type { i64 }
%"struct.std::atomic.0" = type { %"struct.std::__atomic_base.1" }
%"struct.std::__atomic_base.1" = type { i32 }

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local void @_ZN3JPH19LargeIslandSplitter6Splits15StartFirstBatchEv(ptr noundef nonnull align 8 dereferenceable(548)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_ZN3JPH19LargeIslandSplitter24PrepareForSolvePositionsEv(ptr nocapture noundef nonnull readonly align 8 dereferenceable(60) %0) local_unnamed_addr #1 align 2 {
  %2 = getelementptr inbounds i8, ptr %0, i64 48
  %3 = load ptr, ptr %2, align 8, !tbaa !5
  %4 = getelementptr inbounds i8, ptr %0, i64 40
  %5 = load i32, ptr %4, align 8, !tbaa !13
  %6 = zext i32 %5 to i64
  %7 = getelementptr inbounds %"class.JPH::LargeIslandSplitter::Splits", ptr %3, i64 %6
  %.not = icmp eq i32 %5, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph

._crit_edge:                                      ; preds = %.lr.ph, %1
  ret void

.lr.ph:                                           ; preds = %1, %.lr.ph
  %.07 = phi ptr [ %11, %.lr.ph ], [ %3, %1 ]
  %8 = getelementptr inbounds i8, ptr %.07, i64 528
  %9 = load i32, ptr %8, align 8, !tbaa !14
  %10 = getelementptr inbounds i8, ptr %.07, i64 520
  store i32 %9, ptr %10, align 8, !tbaa !19
  tail call void @_ZN3JPH19LargeIslandSplitter6Splits15StartFirstBatchEv(ptr noundef nonnull align 8 dereferenceable(548) %.07)
  %11 = getelementptr inbounds i8, ptr %.07, i64 552
  %12 = icmp ult ptr %11, %7
  br i1 %12, label %.lr.ph, label %._crit_edge, !llvm.loop !20
}

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, !10, i64 48}
!6 = !{!"_ZTSN3JPH19LargeIslandSplitterE", !7, i64 0, !10, i64 8, !10, i64 16, !10, i64 24, !7, i64 32, !11, i64 36, !7, i64 40, !10, i64 48, !11, i64 56}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!"any pointer", !8, i64 0}
!11 = !{!"_ZTSSt6atomicIjE", !12, i64 0}
!12 = !{!"_ZTSSt13__atomic_baseIjE", !7, i64 0}
!13 = !{!6, !7, i64 40}
!14 = !{!15, !7, i64 528}
!15 = !{!"_ZTSN3JPH19LargeIslandSplitter6SplitsE", !8, i64 0, !7, i64 512, !7, i64 516, !7, i64 520, !7, i64 524, !7, i64 528, !16, i64 536, !11, i64 544}
!16 = !{!"_ZTSSt6atomicImE", !17, i64 0}
!17 = !{!"_ZTSSt13__atomic_baseImE", !18, i64 0}
!18 = !{!"long", !8, i64 0}
!19 = !{!15, !7, i64 520}
!20 = distinct !{!20, !21}
!21 = !{!"llvm.loop.mustprogress"}


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