; 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"

@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 @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
declare dso_local double @eval(double noundef, double noundef) #1

; Function Attrs: nounwind uwtable
define dso_local double @f_or(double noundef %0, double noundef %1) #1 {
  %3 = alloca double, align 8
  %4 = alloca double, align 8
  %5 = alloca double, align 8
  store double %0, ptr %3, align 8, !tbaa !5
  store double %1, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #2
  %6 = load double, ptr @nil, align 8, !tbaa !5
  store double %6, ptr %5, align 8, !tbaa !5
  br label %7

7:                                                ; preds = %22, %2
  %8 = load i64, ptr %3, align 8, !tbaa !9
  %9 = lshr i64 %8, 48
  %10 = load i32, ptr @NIL, align 4, !tbaa !11
  %11 = zext i32 %10 to i64
  %12 = icmp ne i64 %9, %11
  br i1 %12, label %13, label %20

13:                                               ; preds = %7
  %14 = load double, ptr %3, align 8, !tbaa !5
  %15 = call double @car(double noundef %14)
  %16 = load double, ptr %4, align 8, !tbaa !5
  %17 = call double @eval(double noundef %15, double noundef %16)
  store double %17, ptr %5, align 8, !tbaa !5
  %18 = call i32 @not(double noundef %17)
  %19 = icmp ne i32 %18, 0
  br label %20

20:                                               ; preds = %13, %7
  %21 = phi i1 [ false, %7 ], [ %19, %13 ]
  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 %7, !llvm.loop !13

25:                                               ; preds = %20
  %26 = load double, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #2
  ret double %26
}

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 = !{!"long long", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"int", !7, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"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
define dso_local double @f_or(double noundef %0, double noundef %1) local_unnamed_addr #0 {
  %3 = load double, ptr @nil, align 8, !tbaa !5
  %4 = bitcast double %0 to i64
  %5 = lshr i64 %4, 48
  %6 = load i32, ptr @NIL, align 4, !tbaa !9
  %7 = zext i32 %6 to i64
  %.not6 = icmp eq i64 %5, %7
  br i1 %.not6, label %.critedge, label %.lr.ph

.lr.ph:                                           ; preds = %2, %11
  %.047 = phi double [ %12, %11 ], [ %0, %2 ]
  %8 = tail call double @car(double noundef %.047)
  %9 = tail call double @eval(double noundef %8, double noundef %1)
  %10 = tail call i32 @not(double noundef %9)
  %.not5 = icmp eq i32 %10, 0
  br i1 %.not5, label %.critedge, label %11

11:                                               ; preds = %.lr.ph
  %12 = tail call double @cdr(double noundef %.047)
  %13 = bitcast double %12 to i64
  %14 = lshr i64 %13, 48
  %15 = load i32, ptr @NIL, align 4, !tbaa !9
  %16 = zext i32 %15 to i64
  %.not = icmp eq i64 %14, %16
  br i1 %.not, label %.critedge, label %.lr.ph, !llvm.loop !11

.critedge:                                        ; preds = %.lr.ph, %11, %2
  %.1 = phi double [ %3, %2 ], [ %9, %11 ], [ %9, %.lr.ph ]
  ret double %.1
}

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


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