; 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"

@NIL = external dso_local global i32, align 4
@nil = external dso_local global double, align 8

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

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

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

; Function Attrs: nounwind uwtable
declare dso_local double @eval(double noundef, double noundef) #0

; Function Attrs: nounwind uwtable
declare dso_local double @f_begin(double noundef, ptr noundef) #0

; Function Attrs: nounwind uwtable
define dso_local double @f_cond(double noundef %0, ptr noundef %1) #0 {
  %3 = alloca double, align 8
  %4 = alloca ptr, align 8
  store double %0, ptr %3, align 8, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !9
  br label %5

5:                                                ; preds = %22, %2
  %6 = load i64, ptr %3, align 8, !tbaa !11
  %7 = lshr i64 %6, 48
  %8 = load i32, ptr @NIL, align 4, !tbaa !13
  %9 = zext i32 %8 to i64
  %10 = icmp ne i64 %7, %9
  br i1 %10, label %11, label %20

11:                                               ; preds = %5
  %12 = load double, ptr %3, align 8, !tbaa !5
  %13 = call double @car(double noundef %12)
  %14 = call double @car(double noundef %13)
  %15 = load ptr, ptr %4, align 8, !tbaa !9
  %16 = load double, ptr %15, align 8, !tbaa !5
  %17 = call double @eval(double noundef %14, double noundef %16)
  %18 = call i32 @not(double noundef %17)
  %19 = icmp ne i32 %18, 0
  br label %20

20:                                               ; preds = %11, %5
  %21 = phi i1 [ false, %5 ], [ %19, %11 ]
  br i1 %21, label %22, label %25

22:                                               ; preds = %20
  %23 = load double, ptr %3, align 8, !tbaa !5
  %24 = call double @cdr(double noundef %23)
  store double %24, ptr %3, align 8, !tbaa !5
  br label %5, !llvm.loop !15

25:                                               ; preds = %20
  %26 = load i64, ptr %3, align 8, !tbaa !11
  %27 = lshr i64 %26, 48
  %28 = load i32, ptr @NIL, align 4, !tbaa !13
  %29 = zext i32 %28 to i64
  %30 = icmp ne i64 %27, %29
  br i1 %30, label %31, label %37

31:                                               ; preds = %25
  %32 = load double, ptr %3, align 8, !tbaa !5
  %33 = call double @car(double noundef %32)
  %34 = call double @cdr(double noundef %33)
  %35 = load ptr, ptr %4, align 8, !tbaa !9
  %36 = call double @f_begin(double noundef %34, ptr noundef %35)
  br label %39

37:                                               ; preds = %25
  %38 = load double, ptr @nil, align 8, !tbaa !5
  br label %39

39:                                               ; preds = %37, %31
  %40 = phi double [ %36, %31 ], [ %38, %37 ]
  ret double %40
}

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 = !{!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 = !{!12, !12, i64 0}
!12 = !{!"long", !7, i64 0}
!13 = !{!14, !14, i64 0}
!14 = !{!"int", !7, i64 0}
!15 = distinct !{!15, !16}
!16 = !{!"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"

@NIL = external dso_local local_unnamed_addr global i32, align 4
@nil = external dso_local local_unnamed_addr global double, align 8

; 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
declare dso_local double @eval(double noundef, double noundef) local_unnamed_addr #0

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

; Function Attrs: nounwind uwtable
define dso_local double @f_cond(double noundef %0, ptr noundef %1) local_unnamed_addr #0 {
  %3 = bitcast double %0 to i64
  %4 = lshr i64 %3, 48
  %5 = load i32, ptr @NIL, align 4, !tbaa !5
  %6 = zext i32 %5 to i64
  %.not8 = icmp eq i64 %4, %6
  br i1 %.not8, label %.critedge, label %.lr.ph.preheader

.lr.ph.preheader:                                 ; preds = %2
  %7 = tail call double @car(double noundef %0)
  %8 = tail call double @car(double noundef %7)
  %9 = load double, ptr %1, align 8, !tbaa !9
  %10 = tail call double @eval(double noundef %8, double noundef %9)
  %11 = tail call i32 @not(double noundef %10)
  %.not629 = icmp eq i32 %11, 0
  br i1 %.not629, label %.lr.ph..critedge.loopexit_crit_edge, label %.lr.ph31

.lr.ph:                                           ; preds = %.lr.ph31
  %12 = tail call double @car(double noundef %17)
  %13 = tail call double @car(double noundef %12)
  %14 = load double, ptr %1, align 8, !tbaa !9
  %15 = tail call double @eval(double noundef %13, double noundef %14)
  %16 = tail call i32 @not(double noundef %15)
  %.not6 = icmp eq i32 %16, 0
  br i1 %.not6, label %.lr.ph..critedge.loopexit_crit_edge, label %.lr.ph31, !llvm.loop !11

.lr.ph..critedge.loopexit_crit_edge:              ; preds = %.lr.ph, %.lr.ph.preheader
  %.lcssa24 = phi i64 [ %4, %.lr.ph.preheader ], [ %19, %.lr.ph ]
  %.09.lcssa = phi double [ %0, %.lr.ph.preheader ], [ %17, %.lr.ph ]
  %.pre.pre = load i32, ptr @NIL, align 4, !tbaa !5
  %.pre16 = zext i32 %.pre.pre to i64
  br label %.critedge

.lr.ph31:                                         ; preds = %.lr.ph.preheader, %.lr.ph
  %.0930 = phi double [ %17, %.lr.ph ], [ %0, %.lr.ph.preheader ]
  %17 = tail call double @cdr(double noundef %.0930)
  %18 = bitcast double %17 to i64
  %19 = lshr i64 %18, 48
  %20 = load i32, ptr @NIL, align 4, !tbaa !5
  %21 = zext i32 %20 to i64
  %.not = icmp eq i64 %19, %21
  br i1 %.not, label %.critedge, label %.lr.ph, !llvm.loop !11

.critedge:                                        ; preds = %.lr.ph31, %.lr.ph..critedge.loopexit_crit_edge, %2
  %.pre-phi = phi i64 [ %6, %2 ], [ %.pre16, %.lr.ph..critedge.loopexit_crit_edge ], [ %21, %.lr.ph31 ]
  %.0.lcssa = phi double [ %0, %2 ], [ %.09.lcssa, %.lr.ph..critedge.loopexit_crit_edge ], [ %17, %.lr.ph31 ]
  %.lcssa = phi i64 [ %4, %2 ], [ %.lcssa24, %.lr.ph..critedge.loopexit_crit_edge ], [ %19, %.lr.ph31 ]
  %.not7 = icmp eq i64 %.lcssa, %.pre-phi
  br i1 %.not7, label %26, label %22

22:                                               ; preds = %.critedge
  %23 = tail call double @car(double noundef %.0.lcssa)
  %24 = tail call double @cdr(double noundef %23)
  %25 = tail call double @f_begin(double noundef %24, ptr noundef %1)
  br label %28

26:                                               ; preds = %.critedge
  %27 = load double, ptr @nil, align 8, !tbaa !9
  br label %28

28:                                               ; preds = %26, %22
  %29 = phi double [ %25, %22 ], [ %27, %26 ]
  ret double %29
}

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 = !{!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 = !{!"double", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}


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