; LLVM IR from kala13x/libxutils :: src/sys (sig)

; 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] }

; 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 uwtable
define dso_local i32 @XSig_Register(ptr noundef %0, i64 noundef %1, ptr noundef %2) #1 {
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  %6 = alloca i64, align 8
  %7 = alloca ptr, align 8
  %8 = alloca i64, align 8
  %9 = alloca %struct.sigaction, align 8
  %10 = alloca i32, align 4
  store ptr %0, ptr %5, align 8, !tbaa !5
  store i64 %1, ptr %6, align 8, !tbaa !9
  store ptr %2, ptr %7, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #3
  store i64 0, ptr %8, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 152, ptr %9) #3
  %11 = getelementptr inbounds %struct.sigaction, ptr %9, i32 0, i32 1
  %12 = call i32 @sigemptyset(ptr noundef %11) #3
  %13 = getelementptr inbounds %struct.sigaction, ptr %9, i32 0, i32 2
  store i32 0, ptr %13, align 8, !tbaa !11
  %14 = load ptr, ptr %7, align 8, !tbaa !5
  %15 = getelementptr inbounds %struct.sigaction, ptr %9, i32 0, i32 0
  store ptr %14, ptr %15, align 8, !tbaa !15
  store i64 0, ptr %8, align 8, !tbaa !9
  br label %16

16:                                               ; preds = %33, %3
  %17 = load i64, ptr %8, align 8, !tbaa !9
  %18 = load i64, ptr %6, align 8, !tbaa !9
  %19 = icmp ult i64 %17, %18
  br i1 %19, label %20, label %36

20:                                               ; preds = %16
  %21 = load ptr, ptr %5, align 8, !tbaa !5
  %22 = load i64, ptr %8, align 8, !tbaa !9
  %23 = getelementptr inbounds i32, ptr %21, i64 %22
  %24 = load i32, ptr %23, align 4, !tbaa !16
  %25 = call i32 @sigaction(i32 noundef %24, ptr noundef %9, ptr noundef null) #3
  %26 = icmp ne i32 %25, 0
  br i1 %26, label %27, label %32

27:                                               ; preds = %20
  %28 = load ptr, ptr %5, align 8, !tbaa !5
  %29 = load i64, ptr %8, align 8, !tbaa !9
  %30 = getelementptr inbounds i32, ptr %28, i64 %29
  %31 = load i32, ptr %30, align 4, !tbaa !16
  store i32 %31, ptr %4, align 4
  store i32 1, ptr %10, align 4
  br label %37

32:                                               ; preds = %20
  br label %33

33:                                               ; preds = %32
  %34 = load i64, ptr %8, align 8, !tbaa !9
  %35 = add i64 %34, 1
  store i64 %35, ptr %8, align 8, !tbaa !9
  br label %16, !llvm.loop !17

36:                                               ; preds = %16
  store i32 0, ptr %4, align 4
  store i32 1, ptr %10, align 4
  br label %37

37:                                               ; preds = %36, %27
  call void @llvm.lifetime.end.p0(i64 152, ptr %9) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #3
  %38 = load i32, ptr %4, align 4
  ret i32 %38
}

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

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

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 "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, !14, i64 136}
!12 = !{!"sigaction", !7, i64 0, !13, i64 8, !14, i64 136, !6, i64 144}
!13 = !{!"", !7, i64 0}
!14 = !{!"int", !7, i64 0}
!15 = !{!7, !7, i64 0}
!16 = !{!14, !14, i64 0}
!17 = distinct !{!17, !18}
!18 = !{!"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"

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

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nounwind uwtable
define dso_local i32 @XSig_Register(ptr nocapture noundef readonly %0, i64 noundef %1, ptr noundef %2) local_unnamed_addr #1 {
  %4 = alloca %struct.sigaction, align 8
  call void @llvm.lifetime.start.p0(i64 152, ptr nonnull %4) #3
  %5 = getelementptr inbounds i8, ptr %4, i64 8
  %6 = call i32 @sigemptyset(ptr noundef nonnull %5) #3
  %7 = getelementptr inbounds i8, ptr %4, i64 136
  store i32 0, ptr %7, align 8, !tbaa !5
  store ptr %2, ptr %4, align 8, !tbaa !12
  %.not10 = icmp eq i64 %1, 0
  br i1 %.not10, label %.loopexit, label %.lr.ph

.lr.ph:                                           ; preds = %3, %14
  %.09 = phi i64 [ %15, %14 ], [ 0, %3 ]
  %8 = getelementptr inbounds i32, ptr %0, i64 %.09
  %9 = load i32, ptr %8, align 4, !tbaa !13
  %10 = call i32 @sigaction(i32 noundef %9, ptr noundef nonnull %4, ptr noundef null) #3
  %.not = icmp eq i32 %10, 0
  br i1 %.not, label %14, label %11

11:                                               ; preds = %.lr.ph
  %12 = getelementptr inbounds i32, ptr %0, i64 %.09
  %13 = load i32, ptr %12, align 4, !tbaa !13
  br label %.loopexit

14:                                               ; preds = %.lr.ph
  %15 = add nuw i64 %.09, 1
  %exitcond.not = icmp eq i64 %15, %1
  br i1 %exitcond.not, label %.loopexit, label %.lr.ph, !llvm.loop !14

.loopexit:                                        ; preds = %14, %3, %11
  %.08 = phi i32 [ %13, %11 ], [ 0, %3 ], [ 0, %14 ]
  call void @llvm.lifetime.end.p0(i64 152, ptr nonnull %4) #3
  ret i32 %.08
}

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

; Function Attrs: nounwind
declare i32 @sigaction(i32 noundef, ptr noundef, ptr noundef) local_unnamed_addr #2

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 "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, !10, i64 136}
!6 = !{!"sigaction", !7, i64 0, !9, i64 8, !10, i64 136, !11, i64 144}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!"", !7, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!"any pointer", !7, i64 0}
!12 = !{!7, !7, i64 0}
!13 = !{!10, !10, i64 0}
!14 = distinct !{!14, !15}
!15 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass