; LLVM IR from Derek-TH-Wang/quadruped_ctrl :: src/osqp/src (lin_alg)

; 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: nounwind uwtable
define dso_local double @vec_mean(ptr noundef %0, i64 noundef %1) #1 {
  %3 = alloca ptr, align 8
  %4 = alloca i64, align 8
  %5 = alloca double, align 8
  %6 = alloca i64, align 8
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i64 %1, ptr %4, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #2
  store double 0.000000e+00, ptr %5, align 8, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #2
  store i64 0, ptr %6, align 8, !tbaa !9
  br label %7

7:                                                ; preds = %18, %2
  %8 = load i64, ptr %6, align 8, !tbaa !9
  %9 = load i64, ptr %4, align 8, !tbaa !9
  %10 = icmp slt i64 %8, %9
  br i1 %10, label %11, label %21

11:                                               ; preds = %7
  %12 = load ptr, ptr %3, align 8, !tbaa !5
  %13 = load i64, ptr %6, align 8, !tbaa !9
  %14 = getelementptr inbounds double, ptr %12, i64 %13
  %15 = load double, ptr %14, align 8, !tbaa !11
  %16 = load double, ptr %5, align 8, !tbaa !11
  %17 = fadd double %16, %15
  store double %17, ptr %5, align 8, !tbaa !11
  br label %18

18:                                               ; preds = %11
  %19 = load i64, ptr %6, align 8, !tbaa !9
  %20 = add nsw i64 %19, 1
  store i64 %20, ptr %6, align 8, !tbaa !9
  br label %7, !llvm.loop !13

21:                                               ; preds = %7
  %22 = load i64, ptr %4, align 8, !tbaa !9
  %23 = sitofp i64 %22 to double
  %24 = load double, ptr %5, align 8, !tbaa !11
  %25 = fdiv double %24, %23
  store double %25, ptr %5, align 8, !tbaa !11
  %26 = load double, ptr %5, align 8, !tbaa !11
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #2
  ret double %26
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"long long", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"double", !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 double @vec_mean(ptr nocapture noundef readonly %0, i64 noundef %1) local_unnamed_addr #0 {
  %3 = icmp sgt i64 %1, 0
  br i1 %3, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %2
  %xtraiter = and i64 %1, 7
  %4 = icmp ult i64 %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 i64 %1, 9223372036854775800
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph, %.lr.ph.preheader.new
  %.011 = phi i64 [ 0, %.lr.ph.preheader.new ], [ %36, %.lr.ph ]
  %.0810 = phi double [ 0.000000e+00, %.lr.ph.preheader.new ], [ %35, %.lr.ph ]
  %niter = phi i64 [ 0, %.lr.ph.preheader.new ], [ %niter.next.7, %.lr.ph ]
  %5 = getelementptr inbounds double, ptr %0, i64 %.011
  %6 = load double, ptr %5, align 8, !tbaa !5
  %7 = fadd double %.0810, %6
  %8 = or disjoint i64 %.011, 1
  %9 = getelementptr inbounds double, ptr %0, i64 %8
  %10 = load double, ptr %9, align 8, !tbaa !5
  %11 = fadd double %7, %10
  %12 = or disjoint i64 %.011, 2
  %13 = getelementptr inbounds double, ptr %0, i64 %12
  %14 = load double, ptr %13, align 8, !tbaa !5
  %15 = fadd double %11, %14
  %16 = or disjoint i64 %.011, 3
  %17 = getelementptr inbounds double, ptr %0, i64 %16
  %18 = load double, ptr %17, align 8, !tbaa !5
  %19 = fadd double %15, %18
  %20 = or disjoint i64 %.011, 4
  %21 = getelementptr inbounds double, ptr %0, i64 %20
  %22 = load double, ptr %21, align 8, !tbaa !5
  %23 = fadd double %19, %22
  %24 = or disjoint i64 %.011, 5
  %25 = getelementptr inbounds double, ptr %0, i64 %24
  %26 = load double, ptr %25, align 8, !tbaa !5
  %27 = fadd double %23, %26
  %28 = or disjoint i64 %.011, 6
  %29 = getelementptr inbounds double, ptr %0, i64 %28
  %30 = load double, ptr %29, align 8, !tbaa !5
  %31 = fadd double %27, %30
  %32 = or disjoint i64 %.011, 7
  %33 = getelementptr inbounds double, ptr %0, i64 %32
  %34 = load double, ptr %33, align 8, !tbaa !5
  %35 = fadd double %31, %34
  %36 = add nuw nsw i64 %.011, 8
  %niter.next.7 = add i64 %niter, 8
  %niter.ncmp.7 = icmp eq i64 %niter.next.7, %unroll_iter
  br i1 %niter.ncmp.7, label %._crit_edge.loopexit.unr-lcssa, label %.lr.ph, !llvm.loop !9

._crit_edge.loopexit.unr-lcssa:                   ; preds = %.lr.ph, %.lr.ph.preheader
  %.lcssa.ph = phi double [ poison, %.lr.ph.preheader ], [ %35, %.lr.ph ]
  %.011.unr = phi i64 [ 0, %.lr.ph.preheader ], [ %36, %.lr.ph ]
  %.0810.unr = phi double [ 0.000000e+00, %.lr.ph.preheader ], [ %35, %.lr.ph ]
  %lcmp.mod.not = icmp eq i64 %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
  %.011.epil = phi i64 [ %40, %.lr.ph.epil ], [ %.011.unr, %._crit_edge.loopexit.unr-lcssa ]
  %.0810.epil = phi double [ %39, %.lr.ph.epil ], [ %.0810.unr, %._crit_edge.loopexit.unr-lcssa ]
  %epil.iter = phi i64 [ %epil.iter.next, %.lr.ph.epil ], [ 0, %._crit_edge.loopexit.unr-lcssa ]
  %37 = getelementptr inbounds double, ptr %0, i64 %.011.epil
  %38 = load double, ptr %37, align 8, !tbaa !5
  %39 = fadd double %.0810.epil, %38
  %40 = add nuw nsw i64 %.011.epil, 1
  %epil.iter.next = add i64 %epil.iter, 1
  %epil.iter.cmp.not = icmp eq i64 %epil.iter.next, %xtraiter
  br i1 %epil.iter.cmp.not, label %._crit_edge, label %.lr.ph.epil, !llvm.loop !11

._crit_edge:                                      ; preds = %._crit_edge.loopexit.unr-lcssa, %.lr.ph.epil, %2
  %.08.lcssa = phi double [ 0.000000e+00, %2 ], [ %.lcssa.ph, %._crit_edge.loopexit.unr-lcssa ], [ %39, %.lr.ph.epil ]
  %41 = sitofp i64 %1 to double
  %42 = fdiv double %.08.lcssa, %41
  ret double %42
}

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" }

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


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