; LLVM IR from Robert-van-Engelen/lisp :: src (lisp-pr)

; 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
declare dso_local double @num(double noundef) #1

; Function Attrs: nounwind uwtable
declare dso_local double @car(double noundef) #1

; Function Attrs: nounwind uwtable
declare dso_local double @cdr(double noundef) #1

; Function Attrs: nounwind uwtable
declare dso_local i32 @not(double noundef) #1

; Function Attrs: nounwind uwtable
define dso_local double @f_div(double noundef %0, ptr noundef %1) #1 {
  %3 = alloca double, align 8
  %4 = alloca ptr, align 8
  %5 = alloca double, align 8
  store double %0, ptr %3, align 8, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #2
  %6 = load double, ptr %3, align 8, !tbaa !5
  %7 = call double @cdr(double noundef %6)
  %8 = call i32 @not(double noundef %7)
  %9 = icmp ne i32 %8, 0
  br i1 %9, label %10, label %14

10:                                               ; preds = %2
  %11 = load double, ptr %3, align 8, !tbaa !5
  %12 = call double @car(double noundef %11)
  %13 = fdiv double 1.000000e+00, %12
  br label %17

14:                                               ; preds = %2
  %15 = load double, ptr %3, align 8, !tbaa !5
  %16 = call double @car(double noundef %15)
  br label %17

17:                                               ; preds = %14, %10
  %18 = phi double [ %13, %10 ], [ %16, %14 ]
  store double %18, ptr %5, align 8, !tbaa !5
  br label %19

19:                                               ; preds = %25, %17
  %20 = load double, ptr %3, align 8, !tbaa !5
  %21 = call double @cdr(double noundef %20)
  store double %21, ptr %3, align 8, !tbaa !5
  %22 = call i32 @not(double noundef %21)
  %23 = icmp ne i32 %22, 0
  %24 = xor i1 %23, true
  br i1 %24, label %25, label %30

25:                                               ; preds = %19
  %26 = load double, ptr %3, align 8, !tbaa !5
  %27 = call double @car(double noundef %26)
  %28 = load double, ptr %5, align 8, !tbaa !5
  %29 = fdiv double %28, %27
  store double %29, ptr %5, align 8, !tbaa !5
  br label %19, !llvm.loop !11

30:                                               ; preds = %19
  %31 = load double, ptr %5, align 8, !tbaa !5
  %32 = call double @num(double noundef %31)
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #2
  ret double %32
}

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 = !{!"double", !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 = distinct !{!11, !12}
!12 = !{!"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: nounwind uwtable
declare dso_local double @num(double noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
declare dso_local double @car(double noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
declare dso_local double @cdr(double noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
declare dso_local i32 @not(double noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local double @f_div(double noundef %0, ptr nocapture noundef readnone %1) local_unnamed_addr #0 {
  %3 = tail call double @cdr(double noundef %0)
  %4 = tail call i32 @not(double noundef %3)
  %.not = icmp eq i32 %4, 0
  %5 = tail call double @car(double noundef %0)
  %6 = fdiv double 1.000000e+00, %5
  %7 = select i1 %.not, double %5, double %6
  %8 = tail call double @cdr(double noundef %0)
  %9 = tail call i32 @not(double noundef %8)
  %.not89 = icmp eq i32 %9, 0
  br i1 %.not89, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %2, %.lr.ph
  %10 = phi double [ %13, %.lr.ph ], [ %8, %2 ]
  %.010 = phi double [ %12, %.lr.ph ], [ %7, %2 ]
  %11 = tail call double @car(double noundef %10)
  %12 = fdiv double %.010, %11
  %13 = tail call double @cdr(double noundef %10)
  %14 = tail call i32 @not(double noundef %13)
  %.not8 = icmp eq i32 %14, 0
  br i1 %.not8, label %.lr.ph, label %._crit_edge, !llvm.loop !5

._crit_edge:                                      ; preds = %.lr.ph, %2
  %.0.lcssa = phi double [ %7, %2 ], [ %12, %.lr.ph ]
  %15 = tail call double @num(double noundef %.0.lcssa)
  ret double %15
}

attributes #0 = { 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" }

!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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}


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