; LLVM IR from scemama/slaterlib :: src (core)

; 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: nounwind uwtable
define dso_local i32 @exc_degree(i32 noundef %0, ptr noundef %1, ptr noundef %2) #0 {
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  store i32 %0, ptr %4, align 4, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !9
  store ptr %2, ptr %6, align 8, !tbaa !9
  %9 = load i32, ptr %4, align 4, !tbaa !5
  %10 = zext i32 %9 to i64
  %11 = load i32, ptr %4, align 4, !tbaa !5
  %12 = zext i32 %11 to i64
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #3
  store i32 0, ptr %8, align 4, !tbaa !5
  store i32 0, ptr %7, align 4, !tbaa !5
  br label %13

13:                                               ; preds = %33, %3
  %14 = load i32, ptr %7, align 4, !tbaa !5
  %15 = load i32, ptr %4, align 4, !tbaa !5
  %16 = icmp ult i32 %14, %15
  br i1 %16, label %17, label %36

17:                                               ; preds = %13
  %18 = load ptr, ptr %5, align 8, !tbaa !9
  %19 = load i32, ptr %7, align 4, !tbaa !5
  %20 = zext i32 %19 to i64
  %21 = getelementptr inbounds i64, ptr %18, i64 %20
  %22 = load i64, ptr %21, align 8, !tbaa !11
  %23 = load ptr, ptr %6, align 8, !tbaa !9
  %24 = load i32, ptr %7, align 4, !tbaa !5
  %25 = zext i32 %24 to i64
  %26 = getelementptr inbounds i64, ptr %23, i64 %25
  %27 = load i64, ptr %26, align 8, !tbaa !11
  %28 = xor i64 %22, %27
  %29 = call i64 @llvm.ctpop.i64(i64 %28)
  %30 = trunc i64 %29 to i32
  %31 = load i32, ptr %8, align 4, !tbaa !5
  %32 = add i32 %31, %30
  store i32 %32, ptr %8, align 4, !tbaa !5
  br label %33

33:                                               ; preds = %17
  %34 = load i32, ptr %7, align 4, !tbaa !5
  %35 = add i32 %34, 1
  store i32 %35, ptr %7, align 4, !tbaa !5
  br label %13, !llvm.loop !13

36:                                               ; preds = %13
  %37 = load i32, ptr %8, align 4, !tbaa !5
  %38 = lshr i32 %37, 1
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #3
  ret i32 %38
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i64 @llvm.ctpop.i64(i64) #2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

attributes #0 = { 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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
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/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"long long", !7, i64 0}
!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: nofree norecurse nosync nounwind memory(argmem: read) uwtable
define dso_local range(i32 0, -2147483648) i32 @exc_degree(i32 noundef %0, ptr nocapture noundef readonly %1, ptr nocapture noundef readonly %2) local_unnamed_addr #0 {
  %.not = icmp eq i32 %0, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph.preheader

.lr.ph.preheader:                                 ; preds = %3
  %wide.trip.count = zext i32 %0 to i64
  %min.iters.check = icmp ult i32 %0, 4
  br i1 %min.iters.check, label %.lr.ph.preheader18, label %vector.ph

vector.ph:                                        ; preds = %.lr.ph.preheader
  %n.vec = and i64 %wide.trip.count, 4294967292
  br label %vector.body

vector.body:                                      ; preds = %vector.body, %vector.ph
  %index = phi i64 [ 0, %vector.ph ], [ %index.next, %vector.body ]
  %vec.phi = phi <2 x i32> [ zeroinitializer, %vector.ph ], [ %14, %vector.body ]
  %vec.phi14 = phi <2 x i32> [ zeroinitializer, %vector.ph ], [ %15, %vector.body ]
  %4 = getelementptr inbounds i64, ptr %1, i64 %index
  %5 = getelementptr inbounds i8, ptr %4, i64 16
  %wide.load = load <2 x i64>, ptr %4, align 8, !tbaa !5
  %wide.load15 = load <2 x i64>, ptr %5, align 8, !tbaa !5
  %6 = getelementptr inbounds i64, ptr %2, i64 %index
  %7 = getelementptr inbounds i8, ptr %6, i64 16
  %wide.load16 = load <2 x i64>, ptr %6, align 8, !tbaa !5
  %wide.load17 = load <2 x i64>, ptr %7, align 8, !tbaa !5
  %8 = xor <2 x i64> %wide.load16, %wide.load
  %9 = xor <2 x i64> %wide.load17, %wide.load15
  %10 = tail call range(i64 0, 65) <2 x i64> @llvm.ctpop.v2i64(<2 x i64> %8)
  %11 = tail call range(i64 0, 65) <2 x i64> @llvm.ctpop.v2i64(<2 x i64> %9)
  %12 = trunc nuw nsw <2 x i64> %10 to <2 x i32>
  %13 = trunc nuw nsw <2 x i64> %11 to <2 x i32>
  %14 = add <2 x i32> %vec.phi, %12
  %15 = add <2 x i32> %vec.phi14, %13
  %index.next = add nuw i64 %index, 4
  %16 = icmp eq i64 %index.next, %n.vec
  br i1 %16, label %middle.block, label %vector.body, !llvm.loop !9

middle.block:                                     ; preds = %vector.body
  %bin.rdx = add <2 x i32> %15, %14
  %17 = tail call i32 @llvm.vector.reduce.add.v2i32(<2 x i32> %bin.rdx)
  %cmp.n = icmp eq i64 %n.vec, %wide.trip.count
  br i1 %cmp.n, label %._crit_edge.loopexit, label %.lr.ph.preheader18

.lr.ph.preheader18:                               ; preds = %middle.block, %.lr.ph.preheader
  %indvars.iv.ph = phi i64 [ 0, %.lr.ph.preheader ], [ %n.vec, %middle.block ]
  %.012.ph = phi i32 [ 0, %.lr.ph.preheader ], [ %17, %middle.block ]
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.preheader18, %.lr.ph
  %indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ %indvars.iv.ph, %.lr.ph.preheader18 ]
  %.012 = phi i32 [ %25, %.lr.ph ], [ %.012.ph, %.lr.ph.preheader18 ]
  %18 = getelementptr inbounds i64, ptr %1, i64 %indvars.iv
  %19 = load i64, ptr %18, align 8, !tbaa !5
  %20 = getelementptr inbounds i64, ptr %2, i64 %indvars.iv
  %21 = load i64, ptr %20, align 8, !tbaa !5
  %22 = xor i64 %21, %19
  %23 = tail call range(i64 0, 65) i64 @llvm.ctpop.i64(i64 %22)
  %24 = trunc nuw nsw i64 %23 to i32
  %25 = add i32 %.012, %24
  %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.loopexit, label %.lr.ph, !llvm.loop !13

._crit_edge.loopexit:                             ; preds = %.lr.ph, %middle.block
  %.lcssa = phi i32 [ %17, %middle.block ], [ %25, %.lr.ph ]
  %26 = lshr i32 %.lcssa, 1
  br label %._crit_edge

._crit_edge:                                      ; preds = %._crit_edge.loopexit, %3
  %.0.lcssa = phi i32 [ 0, %3 ], [ %26, %._crit_edge.loopexit ]
  ret i32 %.0.lcssa
}

; Function Attrs: mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i64 @llvm.ctpop.i64(i64) #1

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare <2 x i64> @llvm.ctpop.v2i64(<2 x i64>) #2

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i32 @llvm.vector.reduce.add.v2i32(<2 x i32>) #2

attributes #0 = { nofree norecurse nosync nounwind memory(argmem: read) 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 nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #2 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }

!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 = !{!"long long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = distinct !{!9, !10, !11, !12}
!10 = !{!"llvm.loop.mustprogress"}
!11 = !{!"llvm.loop.isvectorized", i32 1}
!12 = !{!"llvm.loop.unroll.runtime.disable"}
!13 = distinct !{!13, !10, !12, !11}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,LCSSAPass,LoopLoadEliminationPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,LoopVectorizePass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass