; 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 @r8mat_max(i32 noundef %0, i32 noundef %1, ptr noundef %2) #1 {
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  %9 = alloca double, align 8
  store i32 %0, ptr %4, align 4, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !5
  store ptr %2, ptr %6, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #2
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #2
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #2
  %10 = load ptr, ptr %6, align 8, !tbaa !9
  %11 = load i32, ptr %4, align 4, !tbaa !5
  %12 = mul nsw i32 0, %11
  %13 = add nsw i32 0, %12
  %14 = sext i32 %13 to i64
  %15 = getelementptr inbounds double, ptr %10, i64 %14
  %16 = load double, ptr %15, align 8, !tbaa !11
  store double %16, ptr %9, align 8, !tbaa !11
  store i32 0, ptr %8, align 4, !tbaa !5
  br label %17

17:                                               ; preds = %53, %3
  %18 = load i32, ptr %8, align 4, !tbaa !5
  %19 = load i32, ptr %5, align 4, !tbaa !5
  %20 = icmp slt i32 %18, %19
  br i1 %20, label %21, label %56

21:                                               ; preds = %17
  store i32 0, ptr %7, align 4, !tbaa !5
  br label %22

22:                                               ; preds = %49, %21
  %23 = load i32, ptr %7, align 4, !tbaa !5
  %24 = load i32, ptr %4, align 4, !tbaa !5
  %25 = icmp slt i32 %23, %24
  br i1 %25, label %26, label %52

26:                                               ; preds = %22
  %27 = load double, ptr %9, align 8, !tbaa !11
  %28 = load ptr, ptr %6, align 8, !tbaa !9
  %29 = load i32, ptr %7, align 4, !tbaa !5
  %30 = load i32, ptr %8, align 4, !tbaa !5
  %31 = load i32, ptr %4, align 4, !tbaa !5
  %32 = mul nsw i32 %30, %31
  %33 = add nsw i32 %29, %32
  %34 = sext i32 %33 to i64
  %35 = getelementptr inbounds double, ptr %28, i64 %34
  %36 = load double, ptr %35, align 8, !tbaa !11
  %37 = fcmp olt double %27, %36
  br i1 %37, label %38, label %48

38:                                               ; preds = %26
  %39 = load ptr, ptr %6, align 8, !tbaa !9
  %40 = load i32, ptr %7, align 4, !tbaa !5
  %41 = load i32, ptr %8, align 4, !tbaa !5
  %42 = load i32, ptr %4, align 4, !tbaa !5
  %43 = mul nsw i32 %41, %42
  %44 = add nsw i32 %40, %43
  %45 = sext i32 %44 to i64
  %46 = getelementptr inbounds double, ptr %39, i64 %45
  %47 = load double, ptr %46, align 8, !tbaa !11
  store double %47, ptr %9, align 8, !tbaa !11
  br label %48

48:                                               ; preds = %38, %26
  br label %49

49:                                               ; preds = %48
  %50 = load i32, ptr %7, align 4, !tbaa !5
  %51 = add nsw i32 %50, 1
  store i32 %51, ptr %7, align 4, !tbaa !5
  br label %22, !llvm.loop !13

52:                                               ; preds = %22
  br label %53

53:                                               ; preds = %52
  %54 = load i32, ptr %8, align 4, !tbaa !5
  %55 = add nsw i32 %54, 1
  store i32 %55, ptr %8, align 4, !tbaa !5
  br label %17, !llvm.loop !15

56:                                               ; preds = %17
  %57 = load double, ptr %9, align 8, !tbaa !11
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #2
  ret double %57
}

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"}
!15 = distinct !{!15, !14}


; 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 @r8mat_max(i32 noundef %0, i32 noundef %1, ptr nocapture noundef readonly %2) local_unnamed_addr #0 {
  %4 = load double, ptr %2, align 8, !tbaa !5
  %5 = icmp sgt i32 %1, 0
  %6 = icmp sgt i32 %0, 0
  %or.cond = and i1 %5, %6
  br i1 %or.cond, label %.preheader.us.preheader, label %._crit_edge25

.preheader.us.preheader:                          ; preds = %3
  %7 = zext nneg i32 %0 to i64
  %wide.trip.count32 = zext nneg i32 %1 to i64
  %xtraiter = and i64 %7, 3
  %8 = icmp ult i32 %0, 4
  %unroll_iter = and i64 %7, 2147483644
  %lcmp.mod.not = icmp eq i64 %xtraiter, 0
  br label %.preheader.us

.preheader.us:                                    ; preds = %.preheader.us.preheader, %._crit_edge.us
  %indvars.iv29 = phi i64 [ 0, %.preheader.us.preheader ], [ %indvars.iv.next30, %._crit_edge.us ]
  %.024.us = phi double [ %4, %.preheader.us.preheader ], [ %.2.us.lcssa, %._crit_edge.us ]
  %9 = mul nuw nsw i64 %indvars.iv29, %7
  %invariant.gep = getelementptr inbounds double, ptr %2, i64 %9
  br i1 %8, label %._crit_edge.us.unr-lcssa, label %.preheader.us.new

.preheader.us.new:                                ; preds = %.preheader.us, %.preheader.us.new
  %indvars.iv = phi i64 [ %indvars.iv.next.3, %.preheader.us.new ], [ 0, %.preheader.us ]
  %.122.us = phi double [ %.2.us.3, %.preheader.us.new ], [ %.024.us, %.preheader.us ]
  %niter = phi i64 [ %niter.next.3, %.preheader.us.new ], [ 0, %.preheader.us ]
  %gep = getelementptr inbounds double, ptr %invariant.gep, i64 %indvars.iv
  %10 = load double, ptr %gep, align 8, !tbaa !5
  %11 = fcmp olt double %.122.us, %10
  %.2.us = select i1 %11, double %10, double %.122.us
  %indvars.iv.next = or disjoint i64 %indvars.iv, 1
  %gep.1 = getelementptr inbounds double, ptr %invariant.gep, i64 %indvars.iv.next
  %12 = load double, ptr %gep.1, align 8, !tbaa !5
  %13 = fcmp olt double %.2.us, %12
  %.2.us.1 = select i1 %13, double %12, double %.2.us
  %indvars.iv.next.1 = or disjoint i64 %indvars.iv, 2
  %gep.2 = getelementptr inbounds double, ptr %invariant.gep, i64 %indvars.iv.next.1
  %14 = load double, ptr %gep.2, align 8, !tbaa !5
  %15 = fcmp olt double %.2.us.1, %14
  %.2.us.2 = select i1 %15, double %14, double %.2.us.1
  %indvars.iv.next.2 = or disjoint i64 %indvars.iv, 3
  %gep.3 = getelementptr inbounds double, ptr %invariant.gep, i64 %indvars.iv.next.2
  %16 = load double, ptr %gep.3, align 8, !tbaa !5
  %17 = fcmp olt double %.2.us.2, %16
  %.2.us.3 = select i1 %17, double %16, double %.2.us.2
  %indvars.iv.next.3 = add nuw nsw i64 %indvars.iv, 4
  %niter.next.3 = add i64 %niter, 4
  %niter.ncmp.3 = icmp eq i64 %niter.next.3, %unroll_iter
  br i1 %niter.ncmp.3, label %._crit_edge.us.unr-lcssa, label %.preheader.us.new, !llvm.loop !9

._crit_edge.us.unr-lcssa:                         ; preds = %.preheader.us.new, %.preheader.us
  %.2.us.lcssa.ph = phi double [ poison, %.preheader.us ], [ %.2.us.3, %.preheader.us.new ]
  %indvars.iv.unr = phi i64 [ 0, %.preheader.us ], [ %indvars.iv.next.3, %.preheader.us.new ]
  %.122.us.unr = phi double [ %.024.us, %.preheader.us ], [ %.2.us.3, %.preheader.us.new ]
  br i1 %lcmp.mod.not, label %._crit_edge.us, label %.epil.preheader

.epil.preheader:                                  ; preds = %._crit_edge.us.unr-lcssa, %.epil.preheader
  %indvars.iv.epil = phi i64 [ %indvars.iv.next.epil, %.epil.preheader ], [ %indvars.iv.unr, %._crit_edge.us.unr-lcssa ]
  %.122.us.epil = phi double [ %.2.us.epil, %.epil.preheader ], [ %.122.us.unr, %._crit_edge.us.unr-lcssa ]
  %epil.iter = phi i64 [ %epil.iter.next, %.epil.preheader ], [ 0, %._crit_edge.us.unr-lcssa ]
  %gep.epil = getelementptr inbounds double, ptr %invariant.gep, i64 %indvars.iv.epil
  %18 = load double, ptr %gep.epil, align 8, !tbaa !5
  %19 = fcmp olt double %.122.us.epil, %18
  %.2.us.epil = select i1 %19, double %18, double %.122.us.epil
  %indvars.iv.next.epil = add nuw nsw i64 %indvars.iv.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.us, label %.epil.preheader, !llvm.loop !11

._crit_edge.us:                                   ; preds = %.epil.preheader, %._crit_edge.us.unr-lcssa
  %.2.us.lcssa = phi double [ %.2.us.lcssa.ph, %._crit_edge.us.unr-lcssa ], [ %.2.us.epil, %.epil.preheader ]
  %indvars.iv.next30 = add nuw nsw i64 %indvars.iv29, 1
  %exitcond33.not = icmp eq i64 %indvars.iv.next30, %wide.trip.count32
  br i1 %exitcond33.not, label %._crit_edge25, label %.preheader.us, !llvm.loop !13

._crit_edge25:                                    ; preds = %._crit_edge.us, %3
  %.0.lcssa = phi double [ %4, %3 ], [ %.2.us.lcssa, %._crit_edge.us ]
  ret double %.0.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 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.unroll.disable"}
!13 = distinct !{!13, !10}


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