; 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 void @r8vec_bracket(i32 noundef %0, ptr noundef %1, double noundef %2, ptr noundef %3, ptr noundef %4) #1 {
  %6 = alloca i32, align 4
  %7 = alloca ptr, align 8
  %8 = alloca double, align 8
  %9 = alloca ptr, align 8
  %10 = alloca ptr, align 8
  %11 = alloca i32, align 4
  %12 = alloca i32, align 4
  store i32 %0, ptr %6, align 4, !tbaa !5
  store ptr %1, ptr %7, align 8, !tbaa !9
  store double %2, ptr %8, align 8, !tbaa !11
  store ptr %3, ptr %9, align 8, !tbaa !9
  store ptr %4, ptr %10, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %11) #2
  store i32 2, ptr %11, align 4, !tbaa !5
  br label %13

13:                                               ; preds = %34, %5
  %14 = load i32, ptr %11, align 4, !tbaa !5
  %15 = load i32, ptr %6, align 4, !tbaa !5
  %16 = sub nsw i32 %15, 1
  %17 = icmp sle i32 %14, %16
  br i1 %17, label %18, label %37

18:                                               ; preds = %13
  %19 = load double, ptr %8, align 8, !tbaa !11
  %20 = load ptr, ptr %7, align 8, !tbaa !9
  %21 = load i32, ptr %11, align 4, !tbaa !5
  %22 = sub nsw i32 %21, 1
  %23 = sext i32 %22 to i64
  %24 = getelementptr inbounds double, ptr %20, i64 %23
  %25 = load double, ptr %24, align 8, !tbaa !11
  %26 = fcmp olt double %19, %25
  br i1 %26, label %27, label %33

27:                                               ; preds = %18
  %28 = load i32, ptr %11, align 4, !tbaa !5
  %29 = sub nsw i32 %28, 1
  %30 = load ptr, ptr %9, align 8, !tbaa !9
  store i32 %29, ptr %30, align 4, !tbaa !5
  %31 = load i32, ptr %11, align 4, !tbaa !5
  %32 = load ptr, ptr %10, align 8, !tbaa !9
  store i32 %31, ptr %32, align 4, !tbaa !5
  store i32 1, ptr %12, align 4
  br label %43

33:                                               ; preds = %18
  br label %34

34:                                               ; preds = %33
  %35 = load i32, ptr %11, align 4, !tbaa !5
  %36 = add nsw i32 %35, 1
  store i32 %36, ptr %11, align 4, !tbaa !5
  br label %13, !llvm.loop !13

37:                                               ; preds = %13
  %38 = load i32, ptr %6, align 4, !tbaa !5
  %39 = sub nsw i32 %38, 1
  %40 = load ptr, ptr %9, align 8, !tbaa !9
  store i32 %39, ptr %40, align 4, !tbaa !5
  %41 = load i32, ptr %6, align 4, !tbaa !5
  %42 = load ptr, ptr %10, align 8, !tbaa !9
  store i32 %41, ptr %42, align 4, !tbaa !5
  store i32 1, ptr %12, align 4
  br label %43

43:                                               ; preds = %37, %27
  call void @llvm.lifetime.end.p0(i64 4, ptr %11) #2
  ret void
}

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: readwrite) uwtable
define dso_local void @r8vec_bracket(i32 noundef %0, ptr nocapture noundef readonly %1, double noundef %2, ptr nocapture noundef writeonly %3, ptr nocapture noundef writeonly %4) local_unnamed_addr #0 {
  %.not.not16 = icmp sgt i32 %0, 2
  br i1 %.not.not16, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %5
  %wide.trip.count = zext nneg i32 %0 to i64
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.preheader, %10
  %indvars.iv = phi i64 [ 2, %.lr.ph.preheader ], [ %indvars.iv.next, %10 ]
  %6 = add nsw i64 %indvars.iv, -1
  %7 = getelementptr inbounds double, ptr %1, i64 %6
  %8 = load double, ptr %7, align 8, !tbaa !5
  %9 = fcmp ogt double %8, %2
  br i1 %9, label %.loopexit.loopexit, label %10

10:                                               ; preds = %.lr.ph
  %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, label %.lr.ph, !llvm.loop !9

._crit_edge:                                      ; preds = %10, %5
  %11 = add nsw i32 %0, -1
  br label %.loopexit

.loopexit.loopexit:                               ; preds = %.lr.ph
  %12 = trunc nuw nsw i64 %indvars.iv to i32
  %13 = trunc nuw nsw i64 %6 to i32
  br label %.loopexit

.loopexit:                                        ; preds = %.loopexit.loopexit, %._crit_edge
  %storemerge14 = phi i32 [ %11, %._crit_edge ], [ %13, %.loopexit.loopexit ]
  %storemerge = phi i32 [ %0, %._crit_edge ], [ %12, %.loopexit.loopexit ]
  store i32 %storemerge14, ptr %3, align 4, !tbaa !11
  store i32 %storemerge, ptr %4, align 4, !tbaa !11
  ret void
}

attributes #0 = { nofree norecurse nosync nounwind memory(argmem: readwrite) 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 = !{!12, !12, i64 0}
!12 = !{!"int", !7, i64 0}


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