; LLVM IR from bartobri/data-structures-c :: FIFO-queue/array-no-dup-forget-old (queue)

; 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"

@q = external hidden global ptr, align 8
@N = external hidden global i32, align 4
@head = external hidden global i32, align 4

; Function Attrs: nounwind uwtable
define dso_local i32 @QUEUEget() #0 {
  %1 = load i32, ptr @head, align 4, !tbaa !5
  %2 = load i32, ptr @N, align 4, !tbaa !5
  %3 = srem i32 %1, %2
  store i32 %3, ptr @head, align 4, !tbaa !5
  %4 = load ptr, ptr @q, align 8, !tbaa !9
  %5 = load i32, ptr @head, align 4, !tbaa !5
  %6 = add nsw i32 %5, 1
  store i32 %6, ptr @head, align 4, !tbaa !5
  %7 = sext i32 %5 to i64
  %8 = getelementptr inbounds i32, ptr %4, i64 %7
  %9 = load i32, ptr %8, align 4, !tbaa !5
  ret i32 %9
}

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" }

!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, !10, i64 0}
!10 = !{!"any pointer", !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"

@q = external hidden local_unnamed_addr global ptr, align 8
@N = external hidden local_unnamed_addr global i32, align 4
@head = external hidden local_unnamed_addr global i32, align 4

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(readwrite, argmem: read, inaccessiblemem: none) uwtable
define dso_local i32 @QUEUEget() local_unnamed_addr #0 {
  %1 = load i32, ptr @head, align 4, !tbaa !5
  %2 = load i32, ptr @N, align 4, !tbaa !5
  %3 = srem i32 %1, %2
  %4 = load ptr, ptr @q, align 8, !tbaa !9
  %5 = add nsw i32 %3, 1
  store i32 %5, ptr @head, align 4, !tbaa !5
  %6 = sext i32 %3 to i64
  %7 = getelementptr inbounds i32, ptr %4, i64 %6
  %8 = load i32, ptr %7, align 4, !tbaa !5
  ret i32 %8
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(readwrite, argmem: read, 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, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}


; Effective O3 passes: DSEPass,EarlyCSEPass,GlobalOptPass,PostOrderFunctionAttrsPass