; 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 i32 @r8vec_search_binary_a(i32 noundef %0, ptr noundef %1, double noundef %2) #1 {
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  %6 = alloca double, align 8
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  %10 = alloca i32, align 4
  store i32 %0, ptr %4, align 4, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !9
  store double %2, ptr %6, align 8, !tbaa !11
  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 4, ptr %9) #2
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #2
  store i32 -1, ptr %8, align 4, !tbaa !5
  store i32 1, ptr %9, align 4, !tbaa !5
  %11 = load i32, ptr %4, align 4, !tbaa !5
  store i32 %11, ptr %7, align 4, !tbaa !5
  br label %12

12:                                               ; preds = %57, %3
  %13 = load i32, ptr %9, align 4, !tbaa !5
  %14 = load i32, ptr %7, align 4, !tbaa !5
  %15 = icmp sle i32 %13, %14
  br i1 %15, label %16, label %58

16:                                               ; preds = %12
  %17 = load i32, ptr %9, align 4, !tbaa !5
  %18 = load i32, ptr %7, align 4, !tbaa !5
  %19 = add nsw i32 %17, %18
  %20 = sdiv i32 %19, 2
  store i32 %20, ptr %10, align 4, !tbaa !5
  %21 = load ptr, ptr %5, align 8, !tbaa !9
  %22 = load i32, ptr %10, align 4, !tbaa !5
  %23 = sub nsw i32 %22, 1
  %24 = sext i32 %23 to i64
  %25 = getelementptr inbounds double, ptr %21, i64 %24
  %26 = load double, ptr %25, align 8, !tbaa !11
  %27 = load double, ptr %6, align 8, !tbaa !11
  %28 = fcmp oeq double %26, %27
  br i1 %28, label %29, label %31

29:                                               ; preds = %16
  %30 = load i32, ptr %10, align 4, !tbaa !5
  store i32 %30, ptr %8, align 4, !tbaa !5
  br label %58

31:                                               ; preds = %16
  %32 = load ptr, ptr %5, align 8, !tbaa !9
  %33 = load i32, ptr %10, align 4, !tbaa !5
  %34 = sub nsw i32 %33, 1
  %35 = sext i32 %34 to i64
  %36 = getelementptr inbounds double, ptr %32, i64 %35
  %37 = load double, ptr %36, align 8, !tbaa !11
  %38 = load double, ptr %6, align 8, !tbaa !11
  %39 = fcmp olt double %37, %38
  br i1 %39, label %40, label %43

40:                                               ; preds = %31
  %41 = load i32, ptr %10, align 4, !tbaa !5
  %42 = add nsw i32 %41, 1
  store i32 %42, ptr %9, align 4, !tbaa !5
  br label %56

43:                                               ; preds = %31
  %44 = load double, ptr %6, align 8, !tbaa !11
  %45 = load ptr, ptr %5, align 8, !tbaa !9
  %46 = load i32, ptr %10, align 4, !tbaa !5
  %47 = sub nsw i32 %46, 1
  %48 = sext i32 %47 to i64
  %49 = getelementptr inbounds double, ptr %45, i64 %48
  %50 = load double, ptr %49, align 8, !tbaa !11
  %51 = fcmp olt double %44, %50
  br i1 %51, label %52, label %55

52:                                               ; preds = %43
  %53 = load i32, ptr %10, align 4, !tbaa !5
  %54 = sub nsw i32 %53, 1
  store i32 %54, ptr %7, align 4, !tbaa !5
  br label %55

55:                                               ; preds = %52, %43
  br label %56

56:                                               ; preds = %55, %40
  br label %57

57:                                               ; preds = %56
  br label %12, !llvm.loop !13

58:                                               ; preds = %29, %12
  %59 = load i32, ptr %8, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #2
  call void @llvm.lifetime.end.p0(i64 4, 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 i32 %59
}

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 range(i32 -1, 1073741824) i32 @r8vec_search_binary_a(i32 noundef %0, ptr nocapture noundef readonly %1, double noundef %2) local_unnamed_addr #0 {
  %.not22 = icmp slt i32 %0, 1
  br i1 %.not22, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %3, %18
  %.024 = phi i32 [ %.1, %18 ], [ %0, %3 ]
  %.01723 = phi i32 [ %.118, %18 ], [ 1, %3 ]
  %4 = add nuw nsw i32 %.024, %.01723
  %5 = lshr i32 %4, 1
  %6 = add nsw i32 %5, -1
  %7 = zext nneg i32 %6 to i64
  %8 = getelementptr inbounds double, ptr %1, i64 %7
  %9 = load double, ptr %8, align 8, !tbaa !5
  %10 = fcmp oeq double %9, %2
  br i1 %10, label %._crit_edge, label %11

11:                                               ; preds = %.lr.ph
  %12 = fcmp olt double %9, %2
  br i1 %12, label %13, label %15

13:                                               ; preds = %11
  %14 = add nuw nsw i32 %5, 1
  br label %18

15:                                               ; preds = %11
  %16 = fcmp ogt double %9, %2
  br i1 %16, label %17, label %18

17:                                               ; preds = %15
  br label %18

18:                                               ; preds = %13, %17, %15
  %.118 = phi i32 [ %14, %13 ], [ %.01723, %17 ], [ %.01723, %15 ]
  %.1 = phi i32 [ %.024, %13 ], [ %6, %17 ], [ %.024, %15 ]
  %.not = icmp sgt i32 %.118, %.1
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !9

._crit_edge:                                      ; preds = %18, %.lr.ph, %3
  %.019 = phi i32 [ -1, %3 ], [ %5, %.lr.ph ], [ -1, %18 ]
  ret i32 %.019
}

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"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass