; LLVM IR from CLASS-SZ/class_sz :: class-sz/tools (r8lib)

; 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"

@stderr = external global ptr, align 8
@.str = external hidden unnamed_addr constant [2 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [25 x i8], align 1
@.str.4 = external hidden unnamed_addr constant [45 x i8], align 1
@.str.5 = external hidden unnamed_addr constant [40 x i8], align 1

; 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
declare i32 @fprintf(ptr noundef, ptr noundef, ...) #1

; Function Attrs: noreturn nounwind
declare void @exit(i32 noundef) #2

; Function Attrs: nounwind uwtable
define dso_local i32 @i4_power(i32 noundef %0, i32 noundef %1) #3 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  store i32 %0, ptr %3, align 4, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #4
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #4
  %7 = load i32, ptr %4, align 4, !tbaa !5
  %8 = icmp slt i32 %7, 0
  br i1 %8, label %9, label %26

9:                                                ; preds = %2
  %10 = load i32, ptr %3, align 4, !tbaa !5
  %11 = icmp eq i32 %10, 1
  br i1 %11, label %12, label %13

12:                                               ; preds = %9
  store i32 1, ptr %6, align 4, !tbaa !5
  br label %25

13:                                               ; preds = %9
  %14 = load i32, ptr %3, align 4, !tbaa !5
  %15 = icmp eq i32 %14, 0
  br i1 %15, label %16, label %23

16:                                               ; preds = %13
  %17 = load ptr, ptr @stderr, align 8, !tbaa !9
  %18 = call i32 (ptr, ptr, ...) @fprintf(ptr noundef %17, ptr noundef @.str) #4
  %19 = load ptr, ptr @stderr, align 8, !tbaa !9
  %20 = call i32 (ptr, ptr, ...) @fprintf(ptr noundef %19, ptr noundef @.str.3) #4
  %21 = load ptr, ptr @stderr, align 8, !tbaa !9
  %22 = call i32 (ptr, ptr, ...) @fprintf(ptr noundef %21, ptr noundef @.str.4) #4
  call void @exit(i32 noundef 1) #5
  unreachable

23:                                               ; preds = %13
  store i32 0, ptr %6, align 4, !tbaa !5
  br label %24

24:                                               ; preds = %23
  br label %25

25:                                               ; preds = %24, %12
  br label %61

26:                                               ; preds = %2
  %27 = load i32, ptr %4, align 4, !tbaa !5
  %28 = icmp eq i32 %27, 0
  br i1 %28, label %29, label %41

29:                                               ; preds = %26
  %30 = load i32, ptr %3, align 4, !tbaa !5
  %31 = icmp eq i32 %30, 0
  br i1 %31, label %32, label %39

32:                                               ; preds = %29
  %33 = load ptr, ptr @stderr, align 8, !tbaa !9
  %34 = call i32 (ptr, ptr, ...) @fprintf(ptr noundef %33, ptr noundef @.str) #4
  %35 = load ptr, ptr @stderr, align 8, !tbaa !9
  %36 = call i32 (ptr, ptr, ...) @fprintf(ptr noundef %35, ptr noundef @.str.3) #4
  %37 = load ptr, ptr @stderr, align 8, !tbaa !9
  %38 = call i32 (ptr, ptr, ...) @fprintf(ptr noundef %37, ptr noundef @.str.5) #4
  call void @exit(i32 noundef 1) #5
  unreachable

39:                                               ; preds = %29
  store i32 1, ptr %6, align 4, !tbaa !5
  br label %40

40:                                               ; preds = %39
  br label %60

41:                                               ; preds = %26
  %42 = load i32, ptr %4, align 4, !tbaa !5
  %43 = icmp eq i32 %42, 1
  br i1 %43, label %44, label %46

44:                                               ; preds = %41
  %45 = load i32, ptr %3, align 4, !tbaa !5
  store i32 %45, ptr %6, align 4, !tbaa !5
  br label %59

46:                                               ; preds = %41
  store i32 1, ptr %6, align 4, !tbaa !5
  store i32 1, ptr %5, align 4, !tbaa !5
  br label %47

47:                                               ; preds = %55, %46
  %48 = load i32, ptr %5, align 4, !tbaa !5
  %49 = load i32, ptr %4, align 4, !tbaa !5
  %50 = icmp sle i32 %48, %49
  br i1 %50, label %51, label %58

51:                                               ; preds = %47
  %52 = load i32, ptr %6, align 4, !tbaa !5
  %53 = load i32, ptr %3, align 4, !tbaa !5
  %54 = mul nsw i32 %52, %53
  store i32 %54, ptr %6, align 4, !tbaa !5
  br label %55

55:                                               ; preds = %51
  %56 = load i32, ptr %5, align 4, !tbaa !5
  %57 = add nsw i32 %56, 1
  store i32 %57, ptr %5, align 4, !tbaa !5
  br label %47, !llvm.loop !11

58:                                               ; preds = %47
  br label %59

59:                                               ; preds = %58, %44
  br label %60

60:                                               ; preds = %59, %40
  br label %61

61:                                               ; preds = %60, %25
  %62 = load i32, ptr %6, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #4
  ret i32 %62
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nounwind "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 = { noreturn nounwind "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 #3 = { 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 #4 = { nounwind }
attributes #5 = { noreturn 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"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"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"

@stderr = external local_unnamed_addr global ptr, align 8
@.str = external hidden unnamed_addr constant [2 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [25 x i8], align 1
@.str.4 = external hidden unnamed_addr constant [45 x i8], align 1
@.str.5 = external hidden unnamed_addr constant [40 x i8], align 1

; Function Attrs: nofree nounwind
declare noundef i32 @fprintf(ptr nocapture noundef, ptr nocapture noundef readonly, ...) local_unnamed_addr #0

; Function Attrs: noreturn nounwind
declare void @exit(i32 noundef) local_unnamed_addr #1

; Function Attrs: nounwind uwtable
define dso_local i32 @i4_power(i32 noundef %0, i32 noundef %1) local_unnamed_addr #2 {
  %3 = icmp slt i32 %1, 0
  br i1 %3, label %4, label %13

4:                                                ; preds = %2
  switch i32 %0, label %12 [
    i32 1, label %.loopexit
    i32 0, label %5
  ]

5:                                                ; preds = %4
  %6 = load ptr, ptr @stderr, align 8, !tbaa !5
  %7 = tail call i32 (ptr, ptr, ...) @fprintf(ptr noundef %6, ptr noundef nonnull @.str) #4
  %8 = load ptr, ptr @stderr, align 8, !tbaa !5
  %9 = tail call i32 (ptr, ptr, ...) @fprintf(ptr noundef %8, ptr noundef nonnull @.str.3) #4
  %10 = load ptr, ptr @stderr, align 8, !tbaa !5
  %11 = tail call i32 (ptr, ptr, ...) @fprintf(ptr noundef %10, ptr noundef nonnull @.str.4) #4
  tail call void @exit(i32 noundef 1) #5
  unreachable

12:                                               ; preds = %4
  br label %.loopexit

13:                                               ; preds = %2
  switch i32 %1, label %.lr.ph.preheader [
    i32 0, label %18
    i32 1, label %.loopexit
  ]

.lr.ph.preheader:                                 ; preds = %13
  %min.iters.check = icmp ult i32 %1, 8
  br i1 %min.iters.check, label %.lr.ph.preheader20, label %vector.ph

.lr.ph.preheader20:                               ; preds = %middle.block, %.lr.ph.preheader
  %.018.ph = phi i32 [ 1, %.lr.ph.preheader ], [ %17, %middle.block ]
  %.01317.ph = phi i32 [ 1, %.lr.ph.preheader ], [ %ind.end, %middle.block ]
  br label %.lr.ph

vector.ph:                                        ; preds = %.lr.ph.preheader
  %n.vec = and i32 %1, 2147483640
  %ind.end = or disjoint i32 %n.vec, 1
  %broadcast.splatinsert = insertelement <4 x i32> poison, i32 %0, i64 0
  %broadcast.splat = shufflevector <4 x i32> %broadcast.splatinsert, <4 x i32> poison, <4 x i32> zeroinitializer
  br label %vector.body

vector.body:                                      ; preds = %vector.body, %vector.ph
  %index = phi i32 [ 0, %vector.ph ], [ %index.next, %vector.body ]
  %vec.phi = phi <4 x i32> [ <i32 1, i32 1, i32 1, i32 1>, %vector.ph ], [ %14, %vector.body ]
  %vec.phi19 = phi <4 x i32> [ <i32 1, i32 1, i32 1, i32 1>, %vector.ph ], [ %15, %vector.body ]
  %14 = mul <4 x i32> %vec.phi, %broadcast.splat
  %15 = mul <4 x i32> %vec.phi19, %broadcast.splat
  %index.next = add nuw i32 %index, 8
  %16 = icmp eq i32 %index.next, %n.vec
  br i1 %16, label %middle.block, label %vector.body, !llvm.loop !9

middle.block:                                     ; preds = %vector.body
  %bin.rdx = mul <4 x i32> %15, %14
  %17 = tail call i32 @llvm.vector.reduce.mul.v4i32(<4 x i32> %bin.rdx)
  %cmp.n = icmp eq i32 %n.vec, %1
  br i1 %cmp.n, label %.loopexit, label %.lr.ph.preheader20

18:                                               ; preds = %13
  %19 = icmp eq i32 %0, 0
  br i1 %19, label %20, label %.loopexit

20:                                               ; preds = %18
  %21 = load ptr, ptr @stderr, align 8, !tbaa !5
  %22 = tail call i32 (ptr, ptr, ...) @fprintf(ptr noundef %21, ptr noundef nonnull @.str) #4
  %23 = load ptr, ptr @stderr, align 8, !tbaa !5
  %24 = tail call i32 (ptr, ptr, ...) @fprintf(ptr noundef %23, ptr noundef nonnull @.str.3) #4
  %25 = load ptr, ptr @stderr, align 8, !tbaa !5
  %26 = tail call i32 (ptr, ptr, ...) @fprintf(ptr noundef %25, ptr noundef nonnull @.str.5) #4
  tail call void @exit(i32 noundef 1) #5
  unreachable

.lr.ph:                                           ; preds = %.lr.ph.preheader20, %.lr.ph
  %.018 = phi i32 [ %27, %.lr.ph ], [ %.018.ph, %.lr.ph.preheader20 ]
  %.01317 = phi i32 [ %28, %.lr.ph ], [ %.01317.ph, %.lr.ph.preheader20 ]
  %27 = mul nsw i32 %.018, %0
  %28 = add nuw i32 %.01317, 1
  %exitcond.not = icmp eq i32 %.01317, %1
  br i1 %exitcond.not, label %.loopexit, label %.lr.ph, !llvm.loop !13

.loopexit:                                        ; preds = %.lr.ph, %middle.block, %13, %18, %4, %12
  %.1 = phi i32 [ 0, %12 ], [ %0, %4 ], [ 1, %18 ], [ %0, %13 ], [ %17, %middle.block ], [ %27, %.lr.ph ]
  ret i32 %.1
}

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i32 @llvm.vector.reduce.mul.v4i32(<4 x i32>) #3

attributes #0 = { nofree nounwind "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 #1 = { noreturn nounwind "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 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 #3 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #4 = { cold nounwind }
attributes #5 = { noreturn 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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = distinct !{!9, !10, !11, !12}
!10 = !{!"llvm.loop.mustprogress"}
!11 = !{!"llvm.loop.isvectorized", i32 1}
!12 = !{!"llvm.loop.unroll.runtime.disable"}
!13 = distinct !{!13, !10, !12, !11}


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