; 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"

@__const.XSig_RegExitSigs.nSignals = external hidden unnamed_addr constant [5 x i32], align 16

; 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
declare dso_local void @XSig_Callback(i32 noundef) #1

; Function Attrs: nounwind uwtable
declare dso_local i32 @XSig_Register(ptr noundef, i64 noundef, ptr noundef) #1

; Function Attrs: nounwind uwtable
define dso_local i32 @XSig_RegExitSigs() #1 {
  %1 = alloca [5 x i32], align 16
  %2 = alloca i64, align 8
  call void @llvm.lifetime.start.p0(i64 20, ptr %1) #3
  call void @llvm.memcpy.p0.p0.i64(ptr align 16 %1, ptr align 16 @__const.XSig_RegExitSigs.nSignals, i64 20, i1 false)
  call void @llvm.lifetime.start.p0(i64 8, ptr %2) #3
  store i64 4, ptr %2, align 8, !tbaa !5
  %3 = getelementptr inbounds [5 x i32], ptr %1, i64 0, i64 4
  store i32 7, ptr %3, align 16, !tbaa !9
  %4 = load i64, ptr %2, align 8, !tbaa !5
  %5 = add i64 %4, 1
  store i64 %5, ptr %2, align 8, !tbaa !5
  %6 = getelementptr inbounds [5 x i32], ptr %1, i64 0, i64 0
  %7 = load i64, ptr %2, align 8, !tbaa !5
  %8 = call i32 @XSig_Register(ptr noundef %6, i64 noundef %7, ptr noundef @XSig_Callback)
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #3
  call void @llvm.lifetime.end.p0(i64 20, ptr %1) #3
  ret i32 %8
}

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #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 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
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 = !{!"long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, 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"

@__const.XSig_RegExitSigs.nSignals = external hidden unnamed_addr constant [5 x i32], align 16

; 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
declare dso_local void @XSig_Callback(i32 noundef) #1

; Function Attrs: nounwind uwtable
declare dso_local i32 @XSig_Register(ptr noundef, i64 noundef, ptr noundef) local_unnamed_addr #1

; Function Attrs: nounwind uwtable
define dso_local i32 @XSig_RegExitSigs() local_unnamed_addr #1 {
  %1 = alloca [5 x i32], align 16
  call void @llvm.lifetime.start.p0(i64 20, ptr nonnull %1) #3
  call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 16 dereferenceable(20) %1, ptr noundef nonnull align 16 dereferenceable(20) @__const.XSig_RegExitSigs.nSignals, i64 16, i1 false)
  %2 = getelementptr inbounds i8, ptr %1, i64 16
  store i32 7, ptr %2, align 16, !tbaa !5
  %3 = call i32 @XSig_Register(ptr noundef nonnull %1, i64 noundef 5, ptr noundef nonnull @XSig_Callback)
  call void @llvm.lifetime.end.p0(i64 20, ptr nonnull %1) #3
  ret i32 %3
}

; Function Attrs: mustprogress nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #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 = { mustprogress nocallback nofree nounwind willreturn memory(argmem: readwrite) }
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: DSEPass,EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,SROAPass