; LLVM IR from stan-dev/math :: lib/boost_1.84.0/libs/filesystem/config (has_statx_syscall)

; 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.statx = type { i32, i32, i64, i32, i32, i32, i16, [1 x i16], i64, i64, i64, i64, %struct.statx_timestamp, %struct.statx_timestamp, %struct.statx_timestamp, %struct.statx_timestamp, i32, i32, i32, i32, i64, i64, [12 x i64] }
%struct.statx_timestamp = type { i64, i32, i32 }

@.str = external hidden unnamed_addr constant [2 x i8], align 1

; Function Attrs: mustprogress norecurse nounwind uwtable
define dso_local noundef i32 @main() #0 {
  %1 = alloca %struct.statx, align 8
  %2 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 256, ptr %1) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #3
  %3 = call i64 (i64, ...) @syscall(i64 noundef 332, i32 noundef -100, ptr noundef @.str, i32 noundef 2304, i32 noundef 2048, ptr noundef %1) #3
  %4 = trunc i64 %3 to i32
  store i32 %4, ptr %2, align 4, !tbaa !5
  %5 = getelementptr inbounds %struct.statx, ptr %1, i32 0, i32 13
  %6 = getelementptr inbounds %struct.statx_timestamp, ptr %5, i32 0, i32 0
  store i64 1, ptr %6, align 8, !tbaa !9
  %7 = getelementptr inbounds %struct.statx, ptr %1, i32 0, i32 13
  %8 = getelementptr inbounds %struct.statx_timestamp, ptr %7, i32 0, i32 1
  store i32 10, ptr %8, align 8, !tbaa !14
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #3
  call void @llvm.lifetime.end.p0(i64 256, ptr %1) #3
  ret i32 0
}

; 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 i64 @syscall(i64 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 = { mustprogress norecurse 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++ TBAA"}
!9 = !{!10, !11, i64 80}
!10 = !{!"_ZTS5statx", !6, i64 0, !6, i64 4, !11, i64 8, !6, i64 16, !6, i64 20, !6, i64 24, !12, i64 28, !7, i64 30, !11, i64 32, !11, i64 40, !11, i64 48, !11, i64 56, !13, i64 64, !13, i64 80, !13, i64 96, !13, i64 112, !6, i64 128, !6, i64 132, !6, i64 136, !6, i64 140, !11, i64 144, !11, i64 152, !7, i64 160}
!11 = !{!"long long", !7, i64 0}
!12 = !{!"short", !7, i64 0}
!13 = !{!"_ZTS15statx_timestamp", !11, i64 0, !6, i64 8, !6, i64 12}
!14 = !{!10, !6, i64 88}


; 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.statx = type { i32, i32, i64, i32, i32, i32, i16, [1 x i16], i64, i64, i64, i64, %struct.statx_timestamp, %struct.statx_timestamp, %struct.statx_timestamp, %struct.statx_timestamp, i32, i32, i32, i32, i64, i64, [12 x i64] }
%struct.statx_timestamp = type { i64, i32, i32 }

@.str = external hidden unnamed_addr constant [2 x i8], align 1

; Function Attrs: mustprogress norecurse nounwind uwtable
define dso_local noundef i32 @main() local_unnamed_addr #0 {
  %1 = alloca %struct.statx, align 8
  call void @llvm.lifetime.start.p0(i64 256, ptr nonnull %1) #3
  %2 = call i64 (i64, ...) @syscall(i64 noundef 332, i32 noundef -100, ptr noundef nonnull @.str, i32 noundef 2304, i32 noundef 2048, ptr noundef nonnull %1) #3
  call void @llvm.lifetime.end.p0(i64 256, ptr nonnull %1) #3
  ret i32 0
}

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

; Function Attrs: nounwind
declare i64 @syscall(i64 noundef, ...) 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 = { mustprogress norecurse 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 = { 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)"}


; Effective O3 passes: DSEPass,EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,SROAPass