; LLVM IR from golems/ach :: src (achcat)

; 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.sigaction = type { %union.anon, %struct.__sigset_t, i32, ptr }
%union.anon = type { ptr }
%struct.__sigset_t = type { [16 x i64] }

@stderr = external global ptr, align 8
@.str = external hidden unnamed_addr constant [36 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [28 x i8], align 1

; Function Attrs: nounwind uwtable
define dso_local void @sighandler_install() #0 {
  %1 = alloca %struct.sigaction, align 8
  call void @llvm.lifetime.start.p0(i64 152, ptr %1) #5
  call void @llvm.memset.p0.i64(ptr align 8 %1, i8 0, i64 152, i1 false)
  %2 = getelementptr inbounds %struct.sigaction, ptr %1, i32 0, i32 0
  store ptr @sighandler, ptr %2, align 8, !tbaa !5
  %3 = getelementptr inbounds %struct.sigaction, ptr %1, i32 0, i32 2
  store i32 4, ptr %3, align 8, !tbaa !8
  %4 = call i32 @sigaction(i32 noundef 15, ptr noundef %1, ptr noundef null) #5
  %5 = icmp slt i32 %4, 0
  br i1 %5, label %6, label %12

6:                                                ; preds = %0
  %7 = load ptr, ptr @stderr, align 8, !tbaa !13
  %8 = call ptr @__errno_location() #6
  %9 = load i32, ptr %8, align 4, !tbaa !14
  %10 = call ptr @strerror(i32 noundef %9) #5
  %11 = call i32 (ptr, ptr, ...) @fprintf(ptr noundef %7, ptr noundef @.str, ptr noundef %10) #5
  br label %12

12:                                               ; preds = %6, %0
  %13 = call i32 @sigaction(i32 noundef 2, ptr noundef %1, ptr noundef null) #5
  %14 = icmp slt i32 %13, 0
  br i1 %14, label %15, label %21

15:                                               ; preds = %12
  %16 = load ptr, ptr @stderr, align 8, !tbaa !13
  %17 = call ptr @__errno_location() #6
  %18 = load i32, ptr %17, align 4, !tbaa !14
  %19 = call ptr @strerror(i32 noundef %18) #5
  %20 = call i32 (ptr, ptr, ...) @fprintf(ptr noundef %16, ptr noundef @.str, ptr noundef %19) #5
  br label %21

21:                                               ; preds = %15, %12
  %22 = call ptr @signal(i32 noundef 13, ptr noundef inttoptr (i64 1 to ptr)) #5
  %23 = icmp eq ptr inttoptr (i64 -1 to ptr), %22
  br i1 %23, label %24, label %30

24:                                               ; preds = %21
  %25 = load ptr, ptr @stderr, align 8, !tbaa !13
  %26 = call ptr @__errno_location() #6
  %27 = load i32, ptr %26, align 4, !tbaa !14
  %28 = call ptr @strerror(i32 noundef %27) #5
  %29 = call i32 (ptr, ptr, ...) @fprintf(ptr noundef %25, ptr noundef @.str.1, ptr noundef %28) #5
  br label %30

30:                                               ; preds = %24, %21
  call void @llvm.lifetime.end.p0(i64 152, ptr %1) #5
  ret void
}

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

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #2

; Function Attrs: nounwind uwtable
declare hidden void @sighandler(i32 noundef, ptr noundef, ptr noundef) #0

; Function Attrs: nounwind
declare i32 @sigaction(i32 noundef, ptr noundef, ptr noundef) #3

; Function Attrs: nounwind
declare i32 @fprintf(ptr noundef, ptr noundef, ...) #3

; Function Attrs: nounwind
declare ptr @strerror(i32 noundef) #3

; Function Attrs: nounwind willreturn memory(none)
declare ptr @__errno_location() #4

; Function Attrs: nounwind
declare ptr @signal(i32 noundef, ptr noundef) #3

; 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 = { nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #3 = { 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 #4 = { nounwind willreturn memory(none) "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 #5 = { nounwind }
attributes #6 = { nounwind willreturn memory(none) }

!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 = !{!"omnipotent char", !7, i64 0}
!7 = !{!"Simple C/C++ TBAA"}
!8 = !{!9, !11, i64 136}
!9 = !{!"sigaction", !6, i64 0, !10, i64 8, !11, i64 136, !12, i64 144}
!10 = !{!"", !6, i64 0}
!11 = !{!"int", !6, i64 0}
!12 = !{!"any pointer", !6, i64 0}
!13 = !{!12, !12, i64 0}
!14 = !{!11, !11, i64 0}


; 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.sigaction = type { %union.anon, %struct.__sigset_t, i32, ptr }
%union.anon = type { ptr }
%struct.__sigset_t = type { [16 x i64] }

@stderr = external local_unnamed_addr global ptr, align 8
@.str = external hidden unnamed_addr constant [36 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [28 x i8], align 1

; Function Attrs: nounwind uwtable
define dso_local void @sighandler_install() local_unnamed_addr #0 {
  %1 = alloca %struct.sigaction, align 8
  call void @llvm.lifetime.start.p0(i64 152, ptr nonnull %1) #6
  %2 = getelementptr inbounds i8, ptr %1, i64 8
  call void @llvm.memset.p0.i64(ptr noundef nonnull align 8 dereferenceable(152) %2, i8 0, i64 144, i1 false)
  store ptr @sighandler, ptr %1, align 8, !tbaa !5
  %3 = getelementptr inbounds i8, ptr %1, i64 136
  store i32 4, ptr %3, align 8, !tbaa !8
  %4 = call i32 @sigaction(i32 noundef 15, ptr noundef nonnull %1, ptr noundef null) #6
  %5 = icmp slt i32 %4, 0
  br i1 %5, label %6, label %12

6:                                                ; preds = %0
  %7 = load ptr, ptr @stderr, align 8, !tbaa !13
  %8 = tail call ptr @__errno_location() #7
  %9 = load i32, ptr %8, align 4, !tbaa !14
  %10 = call ptr @strerror(i32 noundef %9) #6
  %11 = call i32 (ptr, ptr, ...) @fprintf(ptr noundef %7, ptr noundef nonnull @.str, ptr noundef %10) #8
  br label %12

12:                                               ; preds = %6, %0
  %13 = call i32 @sigaction(i32 noundef 2, ptr noundef nonnull %1, ptr noundef null) #6
  %14 = icmp slt i32 %13, 0
  br i1 %14, label %15, label %21

15:                                               ; preds = %12
  %16 = load ptr, ptr @stderr, align 8, !tbaa !13
  %17 = tail call ptr @__errno_location() #7
  %18 = load i32, ptr %17, align 4, !tbaa !14
  %19 = call ptr @strerror(i32 noundef %18) #6
  %20 = call i32 (ptr, ptr, ...) @fprintf(ptr noundef %16, ptr noundef nonnull @.str, ptr noundef %19) #8
  br label %21

21:                                               ; preds = %15, %12
  %22 = call ptr @signal(i32 noundef 13, ptr noundef nonnull inttoptr (i64 1 to ptr)) #6
  %23 = icmp eq ptr %22, inttoptr (i64 -1 to ptr)
  br i1 %23, label %24, label %30

24:                                               ; preds = %21
  %25 = load ptr, ptr @stderr, align 8, !tbaa !13
  %26 = tail call ptr @__errno_location() #7
  %27 = load i32, ptr %26, align 4, !tbaa !14
  %28 = call ptr @strerror(i32 noundef %27) #6
  %29 = call i32 (ptr, ptr, ...) @fprintf(ptr noundef %25, ptr noundef nonnull @.str.1, ptr noundef %28) #8
  br label %30

30:                                               ; preds = %24, %21
  call void @llvm.lifetime.end.p0(i64 152, ptr nonnull %1) #6
  ret void
}

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

; Function Attrs: mustprogress nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #2

; Function Attrs: nounwind uwtable
declare hidden void @sighandler(i32 noundef, ptr noundef, ptr noundef) #0

; Function Attrs: nounwind
declare i32 @sigaction(i32 noundef, ptr noundef, ptr noundef) local_unnamed_addr #3

; Function Attrs: nofree nounwind
declare noundef i32 @fprintf(ptr nocapture noundef, ptr nocapture noundef readonly, ...) local_unnamed_addr #4

; Function Attrs: nounwind
declare ptr @strerror(i32 noundef) local_unnamed_addr #3

; Function Attrs: mustprogress nofree nosync nounwind willreturn memory(none)
declare ptr @__errno_location() local_unnamed_addr #5

; Function Attrs: nounwind
declare ptr @signal(i32 noundef, ptr noundef) local_unnamed_addr #3

; Function Attrs: mustprogress 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 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { mustprogress nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #3 = { 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 #4 = { 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 #5 = { mustprogress nofree nosync nounwind willreturn memory(none) "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 #6 = { nounwind }
attributes #7 = { nounwind willreturn memory(none) }
attributes #8 = { cold 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 = !{!"omnipotent char", !7, i64 0}
!7 = !{!"Simple C/C++ TBAA"}
!8 = !{!9, !11, i64 136}
!9 = !{!"sigaction", !6, i64 0, !10, i64 8, !11, i64 136, !12, i64 144}
!10 = !{!"", !6, i64 0}
!11 = !{!"int", !6, i64 0}
!12 = !{!"any pointer", !6, i64 0}
!13 = !{!12, !12, i64 0}
!14 = !{!11, !11, i64 0}


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