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

; 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"

@hp = external dso_local global i32, align 4
@sp = external dso_local global i32, align 4

; 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 float @err(i32 noundef) #1

; Function Attrs: nounwind uwtable
declare dso_local i32 @gc() #1

; Function Attrs: nounwind uwtable
define dso_local i32 @alloc(i32 noundef %0) #1 {
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  store i32 %0, ptr %2, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #2
  %4 = load i32, ptr @hp, align 4, !tbaa !5
  %5 = zext i32 %4 to i64
  %6 = add i64 %5, 4
  %7 = trunc i64 %6 to i32
  store i32 %7, ptr %3, align 4, !tbaa !5
  %8 = load i32, ptr %2, align 4, !tbaa !5
  %9 = zext i32 %8 to i64
  %10 = add i64 %9, 5
  %11 = trunc i64 %10 to i32
  store i32 %11, ptr %2, align 4, !tbaa !5
  %12 = load i32, ptr @hp, align 4, !tbaa !5
  %13 = load i32, ptr %2, align 4, !tbaa !5
  %14 = add i32 %12, %13
  %15 = load i32, ptr @sp, align 4, !tbaa !5
  %16 = sub i32 %15, 1
  %17 = shl i32 %16, 3
  %18 = icmp ugt i32 %14, %17
  br i1 %18, label %19, label %35

19:                                               ; preds = %1
  %20 = call i32 @gc()
  %21 = load i32, ptr @hp, align 4, !tbaa !5
  %22 = load i32, ptr %2, align 4, !tbaa !5
  %23 = add i32 %21, %22
  %24 = load i32, ptr @sp, align 4, !tbaa !5
  %25 = sub i32 %24, 1
  %26 = shl i32 %25, 3
  %27 = icmp ugt i32 %23, %26
  br i1 %27, label %28, label %30

28:                                               ; preds = %19
  %29 = call float @err(i32 noundef 6)
  br label %30

30:                                               ; preds = %28, %19
  %31 = load i32, ptr @hp, align 4, !tbaa !5
  %32 = zext i32 %31 to i64
  %33 = add i64 %32, 4
  %34 = trunc i64 %33 to i32
  store i32 %34, ptr %3, align 4, !tbaa !5
  br label %35

35:                                               ; preds = %30, %1
  %36 = load i32, ptr %2, align 4, !tbaa !5
  %37 = load i32, ptr @hp, align 4, !tbaa !5
  %38 = add i32 %37, %36
  store i32 %38, ptr @hp, align 4, !tbaa !5
  %39 = load i32, ptr %3, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #2
  ret i32 %39
}

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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}


; 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"

@hp = external dso_local local_unnamed_addr global i32, align 4
@sp = external dso_local local_unnamed_addr global i32, align 4

; Function Attrs: nounwind uwtable
declare dso_local float @err(i32 noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
declare dso_local i32 @gc() local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local i32 @alloc(i32 noundef %0) local_unnamed_addr #0 {
  %2 = load i32, ptr @hp, align 4, !tbaa !5
  %3 = add i32 %0, 5
  %4 = add i32 %2, %3
  %5 = load i32, ptr @sp, align 4, !tbaa !5
  %6 = shl i32 %5, 3
  %7 = add i32 %6, -8
  %8 = icmp ugt i32 %4, %7
  br i1 %8, label %9, label %19

9:                                                ; preds = %1
  %10 = tail call i32 @gc()
  %11 = load i32, ptr @hp, align 4, !tbaa !5
  %12 = add i32 %11, %3
  %13 = load i32, ptr @sp, align 4, !tbaa !5
  %14 = shl i32 %13, 3
  %15 = add i32 %14, -8
  %16 = icmp ugt i32 %12, %15
  br i1 %16, label %17, label %19

17:                                               ; preds = %9
  %18 = tail call float @err(i32 noundef 6)
  %.pre = load i32, ptr @hp, align 4, !tbaa !5
  %.pre6 = add i32 %.pre, %3
  br label %19

19:                                               ; preds = %9, %17, %1
  %.pre-phi = phi i32 [ %4, %1 ], [ %.pre6, %17 ], [ %12, %9 ]
  %20 = phi i32 [ %2, %1 ], [ %.pre, %17 ], [ %11, %9 ]
  %.0 = add i32 %20, 4
  store i32 %.pre-phi, ptr @hp, align 4, !tbaa !5
  ret i32 %.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,GVNPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,ReassociatePass,SROAPass,TailCallElimPass