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

; 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 i64, align 8
@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 @more(double noundef) #0

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

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

5:                                                ; preds = %16, %2
  %6 = load ptr, ptr %3, align 8, !tbaa !5
  %7 = load double, ptr %6, align 8, !tbaa !9
  %8 = call i32 @more(double noundef %7)
  %9 = icmp ne i32 %8, 0
  br i1 %9, label %10, label %21

10:                                               ; preds = %5
  %11 = load ptr, ptr %3, align 8, !tbaa !5
  %12 = load double, ptr %11, align 8, !tbaa !9
  %13 = call double @car(double noundef %12)
  %14 = load ptr, ptr %4, align 8, !tbaa !5
  %15 = call double @eval(double noundef %13, ptr noundef %14)
  br label %16

16:                                               ; preds = %10
  %17 = load ptr, ptr %3, align 8, !tbaa !5
  %18 = load double, ptr %17, align 8, !tbaa !9
  %19 = call double @cdr(double noundef %18)
  %20 = load ptr, ptr %3, align 8, !tbaa !5
  store double %19, ptr %20, align 8, !tbaa !9
  br label %5, !llvm.loop !11

21:                                               ; preds = %5
  %22 = load ptr, ptr %3, align 8, !tbaa !5
  %23 = load i64, ptr %22, align 8, !tbaa !13
  %24 = lshr i64 %23, 48
  %25 = load i64, ptr @NIL, align 8, !tbaa !13
  %26 = icmp eq i64 %24, %25
  br i1 %26, label %27, label %29

27:                                               ; preds = %21
  %28 = load double, ptr @nil, align 8, !tbaa !9
  br label %33

29:                                               ; preds = %21
  %30 = load ptr, ptr %3, align 8, !tbaa !5
  %31 = load double, ptr %30, align 8, !tbaa !9
  %32 = call double @car(double noundef %31)
  br label %33

33:                                               ; preds = %29, %27
  %34 = phi double [ %28, %27 ], [ %32, %29 ]
  ret double %34
}

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 = !{!"any pointer", !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"}
!13 = !{!14, !14, i64 0}
!14 = !{!"long", !7, i64 0}


; 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 i64, align 8
@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 @more(double noundef) local_unnamed_addr #0

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

; Function Attrs: nounwind uwtable
define dso_local double @f_begin(ptr nocapture noundef %0, ptr noundef %1) local_unnamed_addr #0 {
  %3 = load double, ptr %0, align 8, !tbaa !5
  %4 = tail call i32 @more(double noundef %3)
  %.not7 = icmp eq i32 %4, 0
  br i1 %.not7, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %2, %.lr.ph
  %5 = load double, ptr %0, align 8, !tbaa !5
  %6 = tail call double @car(double noundef %5)
  %7 = tail call double @eval(double noundef %6, ptr noundef %1)
  %8 = load double, ptr %0, align 8, !tbaa !5
  %9 = tail call double @cdr(double noundef %8)
  store double %9, ptr %0, align 8, !tbaa !5
  %10 = tail call i32 @more(double noundef %9)
  %.not = icmp eq i32 %10, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !9

._crit_edge:                                      ; preds = %.lr.ph, %2
  %11 = load i64, ptr %0, align 8
  %12 = lshr i64 %11, 48
  %13 = load i64, ptr @NIL, align 8, !tbaa !11
  %14 = icmp eq i64 %12, %13
  br i1 %14, label %15, label %17

15:                                               ; preds = %._crit_edge
  %16 = load double, ptr @nil, align 8, !tbaa !5
  br label %20

17:                                               ; preds = %._crit_edge
  %18 = bitcast i64 %11 to double
  %19 = tail call double @car(double noundef %18)
  br label %20

20:                                               ; preds = %17, %15
  %21 = phi double [ %16, %15 ], [ %19, %17 ]
  ret double %21
}

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 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = !{!12, !12, i64 0}
!12 = !{!"long", !7, i64 0}


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