; 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: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare double @llvm.fmuladd.f64(double, double, double) #1

; Function Attrs: nounwind
declare double @sqrt(double noundef) #2

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare double @llvm.fabs.f64(double) #1

; Function Attrs: nounwind uwtable
define dso_local double @r8_hypot(double noundef %0, double noundef %1) #3 {
  %3 = alloca double, align 8
  %4 = alloca double, align 8
  %5 = alloca double, align 8
  %6 = alloca double, align 8
  %7 = alloca double, align 8
  store double %0, ptr %3, align 8, !tbaa !5
  store double %1, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #4
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #4
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #4
  %8 = load double, ptr %3, align 8, !tbaa !5
  %9 = call double @llvm.fabs.f64(double %8)
  %10 = load double, ptr %4, align 8, !tbaa !5
  %11 = call double @llvm.fabs.f64(double %10)
  %12 = fcmp olt double %9, %11
  br i1 %12, label %13, label %18

13:                                               ; preds = %2
  %14 = load double, ptr %4, align 8, !tbaa !5
  %15 = call double @llvm.fabs.f64(double %14)
  store double %15, ptr %5, align 8, !tbaa !5
  %16 = load double, ptr %3, align 8, !tbaa !5
  %17 = call double @llvm.fabs.f64(double %16)
  store double %17, ptr %6, align 8, !tbaa !5
  br label %23

18:                                               ; preds = %2
  %19 = load double, ptr %3, align 8, !tbaa !5
  %20 = call double @llvm.fabs.f64(double %19)
  store double %20, ptr %5, align 8, !tbaa !5
  %21 = load double, ptr %4, align 8, !tbaa !5
  %22 = call double @llvm.fabs.f64(double %21)
  store double %22, ptr %6, align 8, !tbaa !5
  br label %23

23:                                               ; preds = %18, %13
  %24 = load double, ptr %5, align 8, !tbaa !5
  %25 = fcmp oeq double %24, 0.000000e+00
  br i1 %25, label %26, label %27

26:                                               ; preds = %23
  store double 0.000000e+00, ptr %7, align 8, !tbaa !5
  br label %38

27:                                               ; preds = %23
  %28 = load double, ptr %5, align 8, !tbaa !5
  %29 = load double, ptr %6, align 8, !tbaa !5
  %30 = load double, ptr %5, align 8, !tbaa !5
  %31 = fdiv double %29, %30
  %32 = load double, ptr %6, align 8, !tbaa !5
  %33 = load double, ptr %5, align 8, !tbaa !5
  %34 = fdiv double %32, %33
  %35 = call double @llvm.fmuladd.f64(double %31, double %34, double 1.000000e+00)
  %36 = call double @sqrt(double noundef %35) #4
  %37 = fmul double %28, %36
  store double %37, ptr %7, align 8, !tbaa !5
  br label %38

38:                                               ; preds = %27, %26
  %39 = load double, ptr %7, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #4
  ret double %39
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #2 = { nounwind "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 #3 = { 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 #4 = { 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 = !{!"double", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}


; 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: mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare double @llvm.fmuladd.f64(double, double, double) #0

; Function Attrs: mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare double @llvm.fabs.f64(double) #0

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(none) uwtable
define dso_local double @r8_hypot(double noundef %0, double noundef %1) local_unnamed_addr #1 {
  %3 = tail call double @llvm.fabs.f64(double %0)
  %4 = tail call double @llvm.fabs.f64(double %1)
  %5 = fcmp olt double %3, %4
  %. = select i1 %5, double %4, double %3
  %6 = fcmp oeq double %., 0.000000e+00
  br i1 %6, label %11, label %7

7:                                                ; preds = %2
  %.18 = select i1 %5, double %3, double %4
  %8 = fdiv double %.18, %.
  %9 = tail call double @llvm.fmuladd.f64(double %8, double %8, double 1.000000e+00)
  %sqrt = tail call double @llvm.sqrt.f64(double %9)
  %10 = fmul double %., %sqrt
  br label %11

11:                                               ; preds = %2, %7
  %.0 = phi double [ %10, %7 ], [ 0.000000e+00, %2 ]
  ret double %.0
}

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare double @llvm.sqrt.f64(double) #2

attributes #0 = { mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #1 = { mustprogress nofree norecurse nosync nounwind willreturn memory(none) 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 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }

!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)"}


; Effective O3 passes: AggressiveInstCombinePass,EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass