; LLVM IR from rdguez-mariano/fast_imas_IPOL :: libSimuTilts/library.ll (Z4meanPfi)

; 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: 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 noundef float @_Z4meanPfi(ptr noundef %0, i32 noundef %1) #1 {
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  %6 = alloca float, align 4
  %7 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #2
  %8 = load ptr, ptr %3, align 8, !tbaa !5
  %9 = getelementptr inbounds float, ptr %8, i64 0
  store ptr %9, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #2
  store float 0.000000e+00, ptr %6, align 4, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #2
  store i32 0, ptr %7, align 4, !tbaa !9
  br label %10

10:                                               ; preds = %20, %2
  %11 = load i32, ptr %7, align 4, !tbaa !9
  %12 = load i32, ptr %4, align 4, !tbaa !9
  %13 = icmp slt i32 %11, %12
  br i1 %13, label %15, label %14

14:                                               ; preds = %10
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #2
  br label %25

15:                                               ; preds = %10
  %16 = load ptr, ptr %5, align 8, !tbaa !5
  %17 = load float, ptr %16, align 4, !tbaa !11
  %18 = load float, ptr %6, align 4, !tbaa !11
  %19 = fadd float %18, %17
  store float %19, ptr %6, align 4, !tbaa !11
  br label %20

20:                                               ; preds = %15
  %21 = load i32, ptr %7, align 4, !tbaa !9
  %22 = add nsw i32 %21, 1
  store i32 %22, ptr %7, align 4, !tbaa !9
  %23 = load ptr, ptr %5, align 8, !tbaa !5
  %24 = getelementptr inbounds float, ptr %23, i32 1
  store ptr %24, ptr %5, align 8, !tbaa !5
  br label %10, !llvm.loop !13

25:                                               ; preds = %14
  %26 = load i32, ptr %4, align 4, !tbaa !9
  %27 = sitofp i32 %26 to float
  %28 = load float, ptr %6, align 4, !tbaa !11
  %29 = fdiv float %28, %27
  store float %29, ptr %6, align 4, !tbaa !11
  %30 = load float, ptr %6, align 4, !tbaa !11
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #2
  ret float %30
}

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, !12, i64 0}
!12 = !{!"float", !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: mustprogress nofree norecurse nosync nounwind willreturn memory(read, inaccessiblemem: none) uwtable
define dso_local noundef float @_Z4meanPfi(ptr nocapture noundef readonly %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = icmp sgt i32 %1, 0
  br i1 %3, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %2
  %xtraiter = and i32 %1, 7
  %4 = icmp ult i32 %1, 8
  br i1 %4, label %._crit_edge.loopexit.unr-lcssa, label %.lr.ph.preheader.new

.lr.ph.preheader.new:                             ; preds = %.lr.ph.preheader
  %unroll_iter = and i32 %1, 2147483640
  br label %.lr.ph

._crit_edge.loopexit.unr-lcssa:                   ; preds = %.lr.ph, %.lr.ph.preheader
  %.lcssa.ph = phi float [ poison, %.lr.ph.preheader ], [ %32, %.lr.ph ]
  %.0913.unr = phi float [ 0.000000e+00, %.lr.ph.preheader ], [ %32, %.lr.ph ]
  %.01012.unr = phi ptr [ %0, %.lr.ph.preheader ], [ %33, %.lr.ph ]
  %lcmp.mod.not = icmp eq i32 %xtraiter, 0
  br i1 %lcmp.mod.not, label %._crit_edge, label %.lr.ph.epil

.lr.ph.epil:                                      ; preds = %._crit_edge.loopexit.unr-lcssa, %.lr.ph.epil
  %.0913.epil = phi float [ %6, %.lr.ph.epil ], [ %.0913.unr, %._crit_edge.loopexit.unr-lcssa ]
  %.01012.epil = phi ptr [ %7, %.lr.ph.epil ], [ %.01012.unr, %._crit_edge.loopexit.unr-lcssa ]
  %epil.iter = phi i32 [ %epil.iter.next, %.lr.ph.epil ], [ 0, %._crit_edge.loopexit.unr-lcssa ]
  %5 = load float, ptr %.01012.epil, align 4, !tbaa !5
  %6 = fadd float %.0913.epil, %5
  %7 = getelementptr inbounds i8, ptr %.01012.epil, i64 4
  %epil.iter.next = add i32 %epil.iter, 1
  %epil.iter.cmp.not = icmp eq i32 %epil.iter.next, %xtraiter
  br i1 %epil.iter.cmp.not, label %._crit_edge, label %.lr.ph.epil, !llvm.loop !9

._crit_edge:                                      ; preds = %._crit_edge.loopexit.unr-lcssa, %.lr.ph.epil, %2
  %.09.lcssa = phi float [ 0.000000e+00, %2 ], [ %.lcssa.ph, %._crit_edge.loopexit.unr-lcssa ], [ %6, %.lr.ph.epil ]
  %8 = sitofp i32 %1 to float
  %9 = fdiv float %.09.lcssa, %8
  ret float %9

.lr.ph:                                           ; preds = %.lr.ph, %.lr.ph.preheader.new
  %.0913 = phi float [ 0.000000e+00, %.lr.ph.preheader.new ], [ %32, %.lr.ph ]
  %.01012 = phi ptr [ %0, %.lr.ph.preheader.new ], [ %33, %.lr.ph ]
  %niter = phi i32 [ 0, %.lr.ph.preheader.new ], [ %niter.next.7, %.lr.ph ]
  %10 = load float, ptr %.01012, align 4, !tbaa !5
  %11 = fadd float %.0913, %10
  %12 = getelementptr inbounds i8, ptr %.01012, i64 4
  %13 = load float, ptr %12, align 4, !tbaa !5
  %14 = fadd float %11, %13
  %15 = getelementptr inbounds i8, ptr %.01012, i64 8
  %16 = load float, ptr %15, align 4, !tbaa !5
  %17 = fadd float %14, %16
  %18 = getelementptr inbounds i8, ptr %.01012, i64 12
  %19 = load float, ptr %18, align 4, !tbaa !5
  %20 = fadd float %17, %19
  %21 = getelementptr inbounds i8, ptr %.01012, i64 16
  %22 = load float, ptr %21, align 4, !tbaa !5
  %23 = fadd float %20, %22
  %24 = getelementptr inbounds i8, ptr %.01012, i64 20
  %25 = load float, ptr %24, align 4, !tbaa !5
  %26 = fadd float %23, %25
  %27 = getelementptr inbounds i8, ptr %.01012, i64 24
  %28 = load float, ptr %27, align 4, !tbaa !5
  %29 = fadd float %26, %28
  %30 = getelementptr inbounds i8, ptr %.01012, i64 28
  %31 = load float, ptr %30, align 4, !tbaa !5
  %32 = fadd float %29, %31
  %33 = getelementptr inbounds i8, ptr %.01012, i64 32
  %niter.next.7 = add i32 %niter, 8
  %niter.ncmp.7 = icmp eq i32 %niter.next.7, %unroll_iter
  br i1 %niter.ncmp.7, label %._crit_edge.loopexit.unr-lcssa, label %.lr.ph, !llvm.loop !11
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(read, 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 = !{!"float", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.unroll.disable"}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}


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