; LLVM IR from CLASS-SZ/class_sz :: class-sz/tools (r8lib)

; 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 @r8plu_det(i32 noundef %0, ptr noundef %1, ptr noundef %2) #1 {
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca double, align 8
  %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
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #2
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #2
  store double 1.000000e+00, ptr %7, align 8, !tbaa !11
  store i32 0, ptr %8, align 4, !tbaa !5
  br label %9

9:                                                ; preds = %37, %3
  %10 = load i32, ptr %8, align 4, !tbaa !5
  %11 = load i32, ptr %4, align 4, !tbaa !5
  %12 = icmp slt i32 %10, %11
  br i1 %12, label %13, label %40

13:                                               ; preds = %9
  %14 = load double, ptr %7, align 8, !tbaa !11
  %15 = load ptr, ptr %6, align 8, !tbaa !9
  %16 = load i32, ptr %8, align 4, !tbaa !5
  %17 = load i32, ptr %8, align 4, !tbaa !5
  %18 = load i32, ptr %4, align 4, !tbaa !5
  %19 = mul nsw i32 %17, %18
  %20 = add nsw i32 %16, %19
  %21 = sext i32 %20 to i64
  %22 = getelementptr inbounds double, ptr %15, i64 %21
  %23 = load double, ptr %22, align 8, !tbaa !11
  %24 = fmul double %14, %23
  store double %24, ptr %7, align 8, !tbaa !11
  %25 = load ptr, ptr %5, align 8, !tbaa !9
  %26 = load i32, ptr %8, align 4, !tbaa !5
  %27 = sext i32 %26 to i64
  %28 = getelementptr inbounds i32, ptr %25, i64 %27
  %29 = load i32, ptr %28, align 4, !tbaa !5
  %30 = load i32, ptr %8, align 4, !tbaa !5
  %31 = add nsw i32 %30, 1
  %32 = icmp ne i32 %29, %31
  br i1 %32, label %33, label %36

33:                                               ; preds = %13
  %34 = load double, ptr %7, align 8, !tbaa !11
  %35 = fneg double %34
  store double %35, ptr %7, align 8, !tbaa !11
  br label %36

36:                                               ; preds = %33, %13
  br label %37

37:                                               ; preds = %36
  %38 = load i32, ptr %8, align 4, !tbaa !5
  %39 = add nsw i32 %38, 1
  store i32 %39, ptr %8, align 4, !tbaa !5
  br label %9, !llvm.loop !13

40:                                               ; preds = %9
  %41 = load double, ptr %7, align 8, !tbaa !11
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #2
  ret double %41
}

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 = !{!"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 = !{!"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 @r8plu_det(i32 noundef %0, ptr nocapture noundef readonly %1, ptr nocapture noundef readonly %2) local_unnamed_addr #0 {
  %4 = icmp sgt i32 %0, 0
  br i1 %4, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %3
  %5 = add nuw i32 %0, 1
  %wide.trip.count = zext nneg i32 %0 to i64
  %xtraiter = and i64 %wide.trip.count, 1
  %6 = icmp eq i32 %0, 1
  br i1 %6, label %._crit_edge.loopexit.unr-lcssa, label %.lr.ph.new

.lr.ph.new:                                       ; preds = %.lr.ph
  %unroll_iter = and i64 %wide.trip.count, 2147483646
  br label %7

7:                                                ; preds = %7, %.lr.ph.new
  %indvars.iv = phi i64 [ 0, %.lr.ph.new ], [ %indvars.iv.next.1, %7 ]
  %.01214 = phi double [ 1.000000e+00, %.lr.ph.new ], [ %.1.1, %7 ]
  %niter = phi i64 [ 0, %.lr.ph.new ], [ %niter.next.1, %7 ]
  %8 = trunc nuw nsw i64 %indvars.iv to i32
  %9 = mul i32 %5, %8
  %10 = sext i32 %9 to i64
  %11 = getelementptr inbounds double, ptr %2, i64 %10
  %12 = load double, ptr %11, align 8, !tbaa !5
  %13 = fmul double %.01214, %12
  %14 = getelementptr inbounds i32, ptr %1, i64 %indvars.iv
  %15 = load i32, ptr %14, align 4, !tbaa !9
  %indvars.iv.next = or disjoint i64 %indvars.iv, 1
  %16 = zext i32 %15 to i64
  %.not = icmp eq i64 %indvars.iv.next, %16
  %17 = fneg double %13
  %.1 = select i1 %.not, double %13, double %17
  %18 = trunc nuw nsw i64 %indvars.iv.next to i32
  %19 = mul i32 %5, %18
  %20 = sext i32 %19 to i64
  %21 = getelementptr inbounds double, ptr %2, i64 %20
  %22 = load double, ptr %21, align 8, !tbaa !5
  %23 = fmul double %.1, %22
  %24 = getelementptr inbounds i32, ptr %1, i64 %indvars.iv.next
  %25 = load i32, ptr %24, align 4, !tbaa !9
  %indvars.iv.next.1 = add nuw nsw i64 %indvars.iv, 2
  %26 = zext i32 %25 to i64
  %.not.1 = icmp eq i64 %indvars.iv.next.1, %26
  %27 = fneg double %23
  %.1.1 = select i1 %.not.1, double %23, double %27
  %niter.next.1 = add i64 %niter, 2
  %niter.ncmp.1 = icmp eq i64 %niter.next.1, %unroll_iter
  br i1 %niter.ncmp.1, label %._crit_edge.loopexit.unr-lcssa, label %7, !llvm.loop !11

._crit_edge.loopexit.unr-lcssa:                   ; preds = %7, %.lr.ph
  %.1.lcssa.ph = phi double [ poison, %.lr.ph ], [ %.1.1, %7 ]
  %indvars.iv.unr = phi i64 [ 0, %.lr.ph ], [ %indvars.iv.next.1, %7 ]
  %.01214.unr = phi double [ 1.000000e+00, %.lr.ph ], [ %.1.1, %7 ]
  %lcmp.mod.not = icmp eq i64 %xtraiter, 0
  br i1 %lcmp.mod.not, label %._crit_edge, label %._crit_edge.loopexit.epilog-lcssa

._crit_edge.loopexit.epilog-lcssa:                ; preds = %._crit_edge.loopexit.unr-lcssa
  %28 = trunc nuw nsw i64 %indvars.iv.unr to i32
  %29 = mul i32 %5, %28
  %30 = sext i32 %29 to i64
  %31 = getelementptr inbounds double, ptr %2, i64 %30
  %32 = load double, ptr %31, align 8, !tbaa !5
  %33 = fmul double %.01214.unr, %32
  %34 = getelementptr inbounds i32, ptr %1, i64 %indvars.iv.unr
  %35 = load i32, ptr %34, align 4, !tbaa !9
  %indvars.iv.next.epil = add nuw nsw i64 %indvars.iv.unr, 1
  %36 = zext i32 %35 to i64
  %.not.epil = icmp eq i64 %indvars.iv.next.epil, %36
  %37 = fneg double %33
  %.1.epil = select i1 %.not.epil, double %33, double %37
  br label %._crit_edge

._crit_edge:                                      ; preds = %._crit_edge.loopexit.epilog-lcssa, %._crit_edge.loopexit.unr-lcssa, %3
  %.012.lcssa = phi double [ 1.000000e+00, %3 ], [ %.1.lcssa.ph, %._crit_edge.loopexit.unr-lcssa ], [ %.1.epil, %._crit_edge.loopexit.epilog-lcssa ]
  ret double %.012.lcssa
}

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 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}


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