; LLVM IR from chirag-singhal/Coding-Interview-101 :: Miscellaneous/Labs/Lab1/Assignment (seqListOps)

; 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.Location = type { %struct.Job, i32 }
%struct.Job = type { i32, i32, i32, i32 }
%struct.SeqList = type { i32, i32 }

@nextfreeloc = external dso_local global i32, align 4
@st = external dso_local global [10 x %struct.Location], align 16

; Function Attrs: nounwind uwtable
define dso_local i64 @findnextfreeLoc(i64 %0) #0 {
  %2 = alloca %struct.SeqList, align 4
  %3 = alloca %struct.SeqList, align 4
  store i64 %0, ptr %3, align 4
  %4 = load i32, ptr @nextfreeloc, align 4, !tbaa !5
  %5 = getelementptr inbounds %struct.SeqList, ptr %3, i32 0, i32 1
  store i32 %4, ptr %5, align 4, !tbaa !9
  %6 = getelementptr inbounds %struct.SeqList, ptr %3, i32 0, i32 1
  %7 = load i32, ptr %6, align 4, !tbaa !9
  %8 = sext i32 %7 to i64
  %9 = getelementptr inbounds [10 x %struct.Location], ptr @st, i64 0, i64 %8
  %10 = getelementptr inbounds %struct.Location, ptr %9, i32 0, i32 1
  store i32 -1, ptr %10, align 4, !tbaa !11
  call void @llvm.memcpy.p0.p0.i64(ptr align 4 %2, ptr align 4 %3, i64 8, i1 false), !tbaa.struct !14
  %11 = load i64, ptr %2, align 4
  ret i64 %11
}

; 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) #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 nounwind willreturn memory(argmem: readwrite) }

!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"}
!9 = !{!10, !6, i64 4}
!10 = !{!"", !6, i64 0, !6, i64 4}
!11 = !{!12, !6, i64 16}
!12 = !{!"", !13, i64 0, !6, i64 16}
!13 = !{!"", !6, i64 0, !6, i64 4, !6, i64 8, !6, i64 12}
!14 = !{i64 0, i64 4, !5, i64 4, i64 4, !5}


; 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.Location = type { %struct.Job, i32 }
%struct.Job = type { i32, i32, i32, i32 }

@nextfreeloc = external dso_local local_unnamed_addr global i32, align 4
@st = external dso_local local_unnamed_addr global [10 x %struct.Location], align 16

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(readwrite, argmem: none, inaccessiblemem: none) uwtable
define dso_local i64 @findnextfreeLoc(i64 %0) local_unnamed_addr #0 {
  %2 = load i32, ptr @nextfreeloc, align 4, !tbaa !5
  %3 = sext i32 %2 to i64
  %4 = getelementptr inbounds [10 x %struct.Location], ptr @st, i64 0, i64 %3, i32 1
  store i32 -1, ptr %4, align 4, !tbaa !9
  %.sroa.22.0.insert.ext = zext i32 %2 to i64
  %.sroa.22.0.insert.shift = shl nuw i64 %.sroa.22.0.insert.ext, 32
  %.sroa.01.0.insert.ext = and i64 %0, 4294967295
  %.sroa.01.0.insert.insert = or disjoint i64 %.sroa.22.0.insert.shift, %.sroa.01.0.insert.ext
  ret i64 %.sroa.01.0.insert.insert
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(readwrite, argmem: none, inaccessiblemem: none) 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" }

!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"}
!9 = !{!10, !6, i64 16}
!10 = !{!"", !11, i64 0, !6, i64 16}
!11 = !{!"", !6, i64 0, !6, i64 4, !6, i64 8, !6, i64 12}


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