; LLVM IR from KishanBGajera/2024-366-Days-Of-DSA :: Data Structures/Linear/Queue/DEQueue/C (main)

; 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.Dequeue = type { i32, ptr, i32, i32 }

; Function Attrs: nounwind uwtable
define dso_local zeroext i1 @isDQFull(ptr noundef %0) #0 {
  %2 = alloca ptr, align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  %3 = load ptr, ptr %2, align 8, !tbaa !5
  %4 = getelementptr inbounds %struct.Dequeue, ptr %3, i32 0, i32 2
  %5 = load i32, ptr %4, align 8, !tbaa !9
  %6 = icmp eq i32 %5, 0
  br i1 %6, label %7, label %16

7:                                                ; preds = %1
  %8 = load ptr, ptr %2, align 8, !tbaa !5
  %9 = getelementptr inbounds %struct.Dequeue, ptr %8, i32 0, i32 3
  %10 = load i32, ptr %9, align 4, !tbaa !12
  %11 = load ptr, ptr %2, align 8, !tbaa !5
  %12 = getelementptr inbounds %struct.Dequeue, ptr %11, i32 0, i32 0
  %13 = load i32, ptr %12, align 8, !tbaa !13
  %14 = sub nsw i32 %13, 1
  %15 = icmp eq i32 %10, %14
  br i1 %15, label %25, label %16

16:                                               ; preds = %7, %1
  %17 = load ptr, ptr %2, align 8, !tbaa !5
  %18 = getelementptr inbounds %struct.Dequeue, ptr %17, i32 0, i32 2
  %19 = load i32, ptr %18, align 8, !tbaa !9
  %20 = load ptr, ptr %2, align 8, !tbaa !5
  %21 = getelementptr inbounds %struct.Dequeue, ptr %20, i32 0, i32 3
  %22 = load i32, ptr %21, align 4, !tbaa !12
  %23 = add nsw i32 %22, 1
  %24 = icmp eq i32 %19, %23
  br label %25

25:                                               ; preds = %16, %7
  %26 = phi i1 [ true, %7 ], [ %24, %16 ]
  ret i1 %26
}

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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !11, i64 16}
!10 = !{!"Dequeue", !11, i64 0, !6, i64 8, !11, i64 16, !11, i64 20}
!11 = !{!"int", !7, i64 0}
!12 = !{!10, !11, i64 20}
!13 = !{!10, !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"

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: read) uwtable
define dso_local zeroext i1 @isDQFull(ptr nocapture noundef readonly %0) local_unnamed_addr #0 {
  %2 = getelementptr inbounds i8, ptr %0, i64 16
  %3 = load i32, ptr %2, align 8, !tbaa !5
  %4 = icmp eq i32 %3, 0
  %5 = getelementptr inbounds i8, ptr %0, i64 20
  %6 = load i32, ptr %5, align 4, !tbaa !11
  br i1 %4, label %7, label %._crit_edge

7:                                                ; preds = %1
  %8 = load i32, ptr %0, align 8, !tbaa !12
  %9 = add nsw i32 %8, -1
  %10 = icmp eq i32 %6, %9
  br i1 %10, label %13, label %._crit_edge

._crit_edge:                                      ; preds = %1, %7
  %11 = add nsw i32 %6, 1
  %12 = icmp eq i32 %3, %11
  br label %13

13:                                               ; preds = %._crit_edge, %7
  %14 = phi i1 [ true, %7 ], [ %12, %._crit_edge ]
  ret i1 %14
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: read) 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, !7, i64 16}
!6 = !{!"Dequeue", !7, i64 0, !10, i64 8, !7, i64 16, !7, i64 20}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"any pointer", !8, i64 0}
!11 = !{!6, !7, i64 20}
!12 = !{!6, !7, i64 0}


; Effective O3 passes: BDCEPass,EarlyCSEPass,GVNPass,GlobalOptPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass