; LLVM IR from specinfo-ua/UAPKI :: library/uapkic/src (math-int-internal)

; 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"

%struct.WordArray_st = type { ptr, i64 }

; 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

declare i32 @word_bit_len(i64 noundef) #1

; Function Attrs: nounwind uwtable
declare dso_local i64 @int_word_len(ptr noundef) #2

; Function Attrs: nounwind uwtable
define dso_local i64 @int_bit_len(ptr noundef %0) #2 {
  %2 = alloca i64, align 8
  %3 = alloca ptr, align 8
  %4 = alloca i64, align 8
  %5 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #3
  %6 = load ptr, ptr %3, align 8, !tbaa !5
  %7 = call i64 @int_word_len(ptr noundef %6)
  store i64 %7, ptr %4, align 8, !tbaa !9
  %8 = load ptr, ptr %3, align 8, !tbaa !5
  %9 = call i64 @int_word_len(ptr noundef %8)
  %10 = icmp eq i64 %9, 0
  br i1 %10, label %11, label %12

11:                                               ; preds = %1
  store i64 0, ptr %2, align 8
  store i32 1, ptr %5, align 4
  br label %26

12:                                               ; preds = %1
  %13 = load i64, ptr %4, align 8, !tbaa !9
  %14 = sub i64 %13, 1
  %15 = mul i64 %14, 64
  %16 = load ptr, ptr %3, align 8, !tbaa !5
  %17 = getelementptr inbounds %struct.WordArray_st, ptr %16, i32 0, i32 0
  %18 = load ptr, ptr %17, align 8, !tbaa !11
  %19 = load i64, ptr %4, align 8, !tbaa !9
  %20 = sub i64 %19, 1
  %21 = getelementptr inbounds i64, ptr %18, i64 %20
  %22 = load i64, ptr %21, align 8, !tbaa !9
  %23 = call i32 @word_bit_len(i64 noundef %22)
  %24 = sext i32 %23 to i64
  %25 = add i64 %15, %24
  store i64 %25, ptr %2, align 8
  store i32 1, ptr %5, align 4
  br label %26

26:                                               ; preds = %12, %11
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #3
  %27 = load i64, ptr %2, align 8
  ret i64 %27
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { "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 = { 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 = !{!10, !10, i64 0}
!10 = !{!"long", !7, i64 0}
!11 = !{!12, !6, i64 0}
!12 = !{!"WordArray_st", !6, i64 0, !10, i64 8}


; 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"

declare i32 @word_bit_len(i64 noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
declare dso_local i64 @int_word_len(ptr noundef) local_unnamed_addr #1

; Function Attrs: nounwind uwtable
define dso_local i64 @int_bit_len(ptr noundef %0) local_unnamed_addr #1 {
  %2 = tail call i64 @int_word_len(ptr noundef %0)
  %3 = tail call i64 @int_word_len(ptr noundef %0)
  %4 = icmp eq i64 %3, 0
  br i1 %4, label %14, label %5

5:                                                ; preds = %1
  %6 = add i64 %2, -1
  %7 = shl i64 %6, 6
  %8 = load ptr, ptr %0, align 8, !tbaa !5
  %9 = getelementptr inbounds i64, ptr %8, i64 %6
  %10 = load i64, ptr %9, align 8, !tbaa !11
  %11 = tail call i32 @word_bit_len(i64 noundef %10) #2
  %12 = sext i32 %11 to i64
  %13 = add i64 %7, %12
  br label %14

14:                                               ; preds = %1, %5
  %.0 = phi i64 [ %13, %5 ], [ 0, %1 ]
  ret i64 %.0
}

attributes #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 #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, !7, i64 0}
!6 = !{!"WordArray_st", !7, i64 0, !10, i64 8}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"long", !8, i64 0}
!11 = !{!10, !10, i64 0}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass