; 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: 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 @pair(double noundef, double noundef, 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 @more(double noundef) #1

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

; Function Attrs: nounwind uwtable
declare dso_local double @f_begin(double noundef, ptr noundef) #1

; Function Attrs: nounwind uwtable
define dso_local double @f_let(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 ptr, ptr %4, align 8, !tbaa !9
  %7 = load double, ptr %6, align 8, !tbaa !5
  store double %7, ptr %5, align 8, !tbaa !5
  br label %8

8:                                                ; preds = %26, %2
  %9 = load double, ptr %3, align 8, !tbaa !5
  %10 = call i32 @more(double noundef %9)
  %11 = icmp ne i32 %10, 0
  br i1 %11, label %12, label %29

12:                                               ; preds = %8
  %13 = load double, ptr %3, align 8, !tbaa !5
  %14 = call double @car(double noundef %13)
  %15 = call double @car(double noundef %14)
  %16 = load double, ptr %3, align 8, !tbaa !5
  %17 = call double @car(double noundef %16)
  %18 = call double @cdr(double noundef %17)
  %19 = call double @f_begin(double noundef %18, ptr noundef %5)
  %20 = load double, ptr %5, align 8, !tbaa !5
  %21 = call double @eval(double noundef %19, double noundef %20)
  %22 = load ptr, ptr %4, align 8, !tbaa !9
  %23 = load double, ptr %22, align 8, !tbaa !5
  %24 = call double @pair(double noundef %15, double noundef %21, double noundef %23)
  %25 = load ptr, ptr %4, align 8, !tbaa !9
  store double %24, ptr %25, align 8, !tbaa !5
  br label %26

26:                                               ; preds = %12
  %27 = load double, ptr %3, align 8, !tbaa !5
  %28 = call double @cdr(double noundef %27)
  store double %28, ptr %3, align 8, !tbaa !5
  br label %8, !llvm.loop !11

29:                                               ; preds = %8
  %30 = load i64, ptr %3, align 8, !tbaa !13
  %31 = lshr i64 %30, 48
  %32 = load i32, ptr @NIL, align 4, !tbaa !15
  %33 = zext i32 %32 to i64
  %34 = icmp eq i64 %31, %33
  br i1 %34, label %35, label %37

35:                                               ; preds = %29
  %36 = load double, ptr @nil, align 8, !tbaa !5
  br label %40

37:                                               ; preds = %29
  %38 = load double, ptr %3, align 8, !tbaa !5
  %39 = call double @car(double noundef %38)
  br label %40

40:                                               ; preds = %37, %35
  %41 = phi double [ %36, %35 ], [ %39, %37 ]
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #2
  ret double %41
}

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

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

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress 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 @pair(double noundef, double noundef, double noundef) local_unnamed_addr #1

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

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

; Function Attrs: nounwind uwtable
declare dso_local i32 @more(double noundef) local_unnamed_addr #1

; Function Attrs: nounwind uwtable
declare dso_local double @eval(double noundef, double noundef) local_unnamed_addr #1

; Function Attrs: nounwind uwtable
declare dso_local double @f_begin(double noundef, ptr noundef) local_unnamed_addr #1

; Function Attrs: nounwind uwtable
define dso_local double @f_let(double noundef %0, ptr nocapture noundef %1) local_unnamed_addr #1 {
  %3 = alloca double, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #2
  %4 = load double, ptr %1, align 8, !tbaa !5
  store double %4, ptr %3, align 8, !tbaa !5
  %5 = tail call i32 @more(double noundef %0)
  %.not8 = icmp eq i32 %5, 0
  br i1 %.not8, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %2, %.lr.ph
  %.09 = phi double [ %15, %.lr.ph ], [ %0, %2 ]
  %6 = call double @car(double noundef %.09)
  %7 = call double @car(double noundef %6)
  %8 = call double @car(double noundef %.09)
  %9 = call double @cdr(double noundef %8)
  %10 = call double @f_begin(double noundef %9, ptr noundef nonnull %3)
  %11 = load double, ptr %3, align 8, !tbaa !5
  %12 = call double @eval(double noundef %10, double noundef %11)
  %13 = load double, ptr %1, align 8, !tbaa !5
  %14 = call double @pair(double noundef %7, double noundef %12, double noundef %13)
  store double %14, ptr %1, align 8, !tbaa !5
  %15 = call double @cdr(double noundef %.09)
  %16 = call i32 @more(double noundef %15)
  %.not = icmp eq i32 %16, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !9

._crit_edge:                                      ; preds = %.lr.ph, %2
  %.0.lcssa = phi double [ %0, %2 ], [ %15, %.lr.ph ]
  %17 = bitcast double %.0.lcssa to i64
  %18 = lshr i64 %17, 48
  %19 = load i32, ptr @NIL, align 4, !tbaa !11
  %20 = zext i32 %19 to i64
  %21 = icmp eq i64 %18, %20
  br i1 %21, label %22, label %24

22:                                               ; preds = %._crit_edge
  %23 = load double, ptr @nil, align 8, !tbaa !5
  br label %26

24:                                               ; preds = %._crit_edge
  %25 = call double @car(double noundef %.0.lcssa)
  br label %26

26:                                               ; preds = %24, %22
  %27 = phi double [ %23, %22 ], [ %25, %24 ]
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #2
  ret double %27
}

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


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