; LLVM IR from InsightSoftwareConsortium/ITK :: Modules/ThirdParty/ZLIB/src/itkzlib-ng/arch/riscv (riscv_features)

; 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.utsname = type { [65 x i8], [65 x i8], [65 x i8], [65 x i8], [65 x i8], [65 x i8] }

@.str = external hidden unnamed_addr constant [6 x i8], align 1

; Function Attrs: nounwind uwtable
define dso_local i32 @is_kernel_version_greater_or_equal_to_6_5() #0 {
  %1 = alloca i32, align 4
  %2 = alloca %struct.utsname, align 1
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 390, ptr %2) #3
  %6 = call i32 @uname(ptr noundef %2) #3
  %7 = icmp eq i32 %6, -1
  br i1 %7, label %8, label %9

8:                                                ; preds = %0
  store i32 0, ptr %1, align 4
  store i32 1, ptr %3, align 4
  br label %27

9:                                                ; preds = %0
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #3
  %10 = getelementptr inbounds %struct.utsname, ptr %2, i32 0, i32 2
  %11 = getelementptr inbounds [65 x i8], ptr %10, i64 0, i64 0
  %12 = call i32 (ptr, ptr, ...) @__isoc99_sscanf(ptr noundef %11, ptr noundef @.str, ptr noundef %4, ptr noundef %5) #3
  %13 = icmp ne i32 %12, 2
  br i1 %13, label %14, label %15

14:                                               ; preds = %9
  store i32 0, ptr %1, align 4
  store i32 1, ptr %3, align 4
  br label %26

15:                                               ; preds = %9
  %16 = load i32, ptr %4, align 4, !tbaa !5
  %17 = icmp sgt i32 %16, 6
  br i1 %17, label %24, label %18

18:                                               ; preds = %15
  %19 = load i32, ptr %4, align 4, !tbaa !5
  %20 = icmp eq i32 %19, 6
  br i1 %20, label %21, label %25

21:                                               ; preds = %18
  %22 = load i32, ptr %5, align 4, !tbaa !5
  %23 = icmp sge i32 %22, 5
  br i1 %23, label %24, label %25

24:                                               ; preds = %21, %15
  store i32 1, ptr %1, align 4
  store i32 1, ptr %3, align 4
  br label %26

25:                                               ; preds = %21, %18
  store i32 0, ptr %1, align 4
  store i32 1, ptr %3, align 4
  br label %26

26:                                               ; preds = %25, %24, %14
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #3
  br label %27

27:                                               ; preds = %26, %8
  call void @llvm.lifetime.end.p0(i64 390, ptr %2) #3
  %28 = load i32, ptr %1, align 4
  ret i32 %28
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nounwind
declare i32 @uname(ptr noundef) #2

; Function Attrs: nounwind
declare i32 @__isoc99_sscanf(ptr noundef, ptr noundef, ...) #2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #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" }
attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { 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 }

!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"

%struct.utsname = type { [65 x i8], [65 x i8], [65 x i8], [65 x i8], [65 x i8], [65 x i8] }

@.str = external hidden unnamed_addr constant [6 x i8], align 1

; Function Attrs: nofree nounwind uwtable
define dso_local range(i32 0, 2) i32 @is_kernel_version_greater_or_equal_to_6_5() local_unnamed_addr #0 {
  %1 = alloca %struct.utsname, align 1
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 390, ptr nonnull %1) #3
  %4 = call i32 @uname(ptr noundef nonnull %1) #3
  %5 = icmp eq i32 %4, -1
  br i1 %5, label %17, label %6

6:                                                ; preds = %0
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %2) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %3) #3
  %7 = getelementptr inbounds i8, ptr %1, i64 130
  %8 = call i32 (ptr, ptr, ...) @__isoc99_sscanf(ptr noundef nonnull %7, ptr noundef nonnull @.str, ptr noundef nonnull %2, ptr noundef nonnull %3) #3
  %.not = icmp eq i32 %8, 2
  br i1 %.not, label %9, label %16

9:                                                ; preds = %6
  %10 = load i32, ptr %2, align 4, !tbaa !5
  %11 = icmp sgt i32 %10, 6
  br i1 %11, label %16, label %12

12:                                               ; preds = %9
  %13 = icmp eq i32 %10, 6
  %14 = load i32, ptr %3, align 4
  %15 = icmp sgt i32 %14, 4
  %or.cond = select i1 %13, i1 %15, i1 false
  %spec.select = zext i1 %or.cond to i32
  br label %16

16:                                               ; preds = %12, %9, %6
  %.0 = phi i32 [ 0, %6 ], [ 1, %9 ], [ %spec.select, %12 ]
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %3) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %2) #3
  br label %17

17:                                               ; preds = %0, %16
  %.1 = phi i32 [ %.0, %16 ], [ 0, %0 ]
  call void @llvm.lifetime.end.p0(i64 390, ptr nonnull %1) #3
  ret i32 %.1
}

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nofree nounwind
declare noundef i32 @uname(ptr nocapture noundef) local_unnamed_addr #2

; Function Attrs: nofree nounwind
declare noundef i32 @__isoc99_sscanf(ptr nocapture noundef readonly, ptr nocapture noundef readonly, ...) local_unnamed_addr #2

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

attributes #0 = { nofree 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 #1 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { 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 #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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass