; 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"

@ATOM = external dso_local global i32, align 4
@CONS = 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 @assoc(double noundef, double noundef) #0

; Function Attrs: nounwind uwtable
define dso_local double @eval(double noundef %0, double noundef %1) #0 {
  %3 = alloca double, align 8
  %4 = alloca double, align 8
  store double %0, ptr %3, align 8, !tbaa !5
  store double %1, ptr %4, align 8, !tbaa !5
  %5 = load i64, ptr %3, align 8, !tbaa !9
  %6 = lshr i64 %5, 48
  %7 = load i32, ptr @ATOM, align 4, !tbaa !11
  %8 = zext i32 %7 to i64
  %9 = icmp eq i64 %6, %8
  br i1 %9, label %10, label %14

10:                                               ; preds = %2
  %11 = load double, ptr %3, align 8, !tbaa !5
  %12 = load double, ptr %4, align 8, !tbaa !5
  %13 = call double @assoc(double noundef %11, double noundef %12)
  br label %33

14:                                               ; preds = %2
  %15 = load i64, ptr %3, 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 %29

20:                                               ; preds = %14
  %21 = load double, ptr %3, align 8, !tbaa !5
  %22 = call double @car(double noundef %21)
  %23 = load double, ptr %4, align 8, !tbaa !5
  %24 = call double @eval(double noundef %22, double noundef %23)
  %25 = load double, ptr %3, align 8, !tbaa !5
  %26 = call double @cdr(double noundef %25)
  %27 = load double, ptr %4, align 8, !tbaa !5
  %28 = call double @apply(double noundef %24, double noundef %26, double noundef %27)
  br label %31

29:                                               ; preds = %14
  %30 = load double, ptr %3, align 8, !tbaa !5
  br label %31

31:                                               ; preds = %29, %20
  %32 = phi double [ %28, %20 ], [ %30, %29 ]
  br label %33

33:                                               ; preds = %31, %10
  %34 = phi double [ %13, %10 ], [ %32, %31 ]
  ret double %34
}

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

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"

@ATOM = external dso_local local_unnamed_addr global i32, align 4
@CONS = 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 @assoc(double noundef, double noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local double @eval(double noundef %0, double noundef %1) local_unnamed_addr #0 {
  %3 = bitcast double %0 to i64
  %4 = lshr i64 %3, 48
  %5 = load i32, ptr @ATOM, align 4, !tbaa !5
  %6 = zext i32 %5 to i64
  %7 = icmp eq i64 %4, %6
  br i1 %7, label %8, label %10

8:                                                ; preds = %2
  %9 = tail call double @assoc(double noundef %0, double noundef %1)
  br label %common.ret8

10:                                               ; preds = %2
  %11 = load i32, ptr @CONS, align 4, !tbaa !5
  %12 = zext i32 %11 to i64
  %13 = icmp eq i64 %4, %12
  br i1 %13, label %14, label %common.ret8

common.ret8:                                      ; preds = %10, %8, %14
  %common.ret8.op = phi double [ %18, %14 ], [ %9, %8 ], [ %0, %10 ]
  ret double %common.ret8.op

14:                                               ; preds = %10
  %15 = tail call double @car(double noundef %0)
  %16 = tail call double @eval(double noundef %15, double noundef %1)
  %17 = tail call double @cdr(double noundef %0)
  %18 = tail call double @apply(double noundef %16, double noundef %17, double noundef %1)
  br label %common.ret8
}

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

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,GlobalOptPass,SROAPass,SimplifyCFGPass,TailCallElimPass