; LLVM IR from Robert-van-Engelen/tinylisp :: src (tinylisp-commented)

; 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"

@CONS = external dso_local global i32, align 4
@NIL = external dso_local global i32, align 4

; 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 double @pair(double noundef, double noundef, double noundef) #0

; Function Attrs: nounwind uwtable
define dso_local double @bind(double noundef %0, double noundef %1, double noundef %2) #0 {
  %4 = alloca double, align 8
  %5 = alloca double, align 8
  %6 = alloca double, align 8
  store double %0, ptr %4, align 8, !tbaa !5
  store double %1, ptr %5, align 8, !tbaa !5
  store double %2, ptr %6, align 8, !tbaa !5
  %7 = load i64, ptr %4, align 8, !tbaa !9
  %8 = lshr i64 %7, 48
  %9 = load i32, ptr @NIL, align 4, !tbaa !11
  %10 = zext i32 %9 to i64
  %11 = icmp eq i64 %8, %10
  br i1 %11, label %12, label %14

12:                                               ; preds = %3
  %13 = load double, ptr %6, align 8, !tbaa !5
  br label %39

14:                                               ; preds = %3
  %15 = load i64, ptr %4, align 8, !tbaa !9
  %16 = lshr i64 %15, 48
  %17 = load i32, ptr @CONS, align 4, !tbaa !11
  %18 = zext i32 %17 to i64
  %19 = icmp eq i64 %16, %18
  br i1 %19, label %20, label %32

20:                                               ; preds = %14
  %21 = load double, ptr %4, align 8, !tbaa !5
  %22 = call double @cdr(double noundef %21)
  %23 = load double, ptr %5, align 8, !tbaa !5
  %24 = call double @cdr(double noundef %23)
  %25 = load double, ptr %4, align 8, !tbaa !5
  %26 = call double @car(double noundef %25)
  %27 = load double, ptr %5, align 8, !tbaa !5
  %28 = call double @car(double noundef %27)
  %29 = load double, ptr %6, align 8, !tbaa !5
  %30 = call double @pair(double noundef %26, double noundef %28, double noundef %29)
  %31 = call double @bind(double noundef %22, double noundef %24, double noundef %30)
  br label %37

32:                                               ; preds = %14
  %33 = load double, ptr %4, align 8, !tbaa !5
  %34 = load double, ptr %5, align 8, !tbaa !5
  %35 = load double, ptr %6, align 8, !tbaa !5
  %36 = call double @pair(double noundef %33, double noundef %34, double noundef %35)
  br label %37

37:                                               ; preds = %32, %20
  %38 = phi double [ %31, %20 ], [ %36, %32 ]
  br label %39

39:                                               ; preds = %37, %12
  %40 = phi double [ %13, %12 ], [ %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 = !{!"long long", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"int", !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"

@CONS = external dso_local local_unnamed_addr global i32, align 4
@NIL = external dso_local local_unnamed_addr global i32, align 4

; 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 double @pair(double noundef, double noundef, double noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local double @bind(double noundef %0, double noundef %1, double noundef %2) local_unnamed_addr #0 {
  %4 = bitcast double %0 to i64
  %5 = lshr i64 %4, 48
  %6 = load i32, ptr @NIL, align 4, !tbaa !5
  %7 = zext i32 %6 to i64
  %8 = icmp eq i64 %5, %7
  br i1 %8, label %.loopexit, label %.lr.ph

.lr.ph:                                           ; preds = %3, %tailrecurse
  %9 = phi i64 [ %19, %tailrecurse ], [ %5, %3 ]
  %.tr1117 = phi double [ %17, %tailrecurse ], [ %2, %3 ]
  %.tr1016 = phi double [ %14, %tailrecurse ], [ %1, %3 ]
  %.tr15 = phi double [ %13, %tailrecurse ], [ %0, %3 ]
  %10 = load i32, ptr @CONS, align 4, !tbaa !5
  %11 = zext i32 %10 to i64
  %12 = icmp eq i64 %9, %11
  br i1 %12, label %tailrecurse, label %23

tailrecurse:                                      ; preds = %.lr.ph
  %13 = tail call double @cdr(double noundef %.tr15)
  %14 = tail call double @cdr(double noundef %.tr1016)
  %15 = tail call double @car(double noundef %.tr15)
  %16 = tail call double @car(double noundef %.tr1016)
  %17 = tail call double @pair(double noundef %15, double noundef %16, double noundef %.tr1117)
  %18 = bitcast double %13 to i64
  %19 = lshr i64 %18, 48
  %20 = load i32, ptr @NIL, align 4, !tbaa !5
  %21 = zext i32 %20 to i64
  %22 = icmp eq i64 %19, %21
  br i1 %22, label %.loopexit, label %.lr.ph

23:                                               ; preds = %.lr.ph
  %24 = tail call double @pair(double noundef %.tr15, double noundef %.tr1016, double noundef %.tr1117)
  br label %.loopexit

.loopexit:                                        ; preds = %tailrecurse, %3, %23
  %25 = phi double [ %24, %23 ], [ %2, %3 ], [ %17, %tailrecurse ]
  ret double %25
}

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"}


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