; LLVM IR from mahendramahara/DSA-in-C-Programing :: QUEUE (circularqueue)

; 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"

@front = external dso_local global i32, align 4
@rear = external dso_local global i32, align 4

; Function Attrs: nounwind uwtable
define dso_local i32 @isFull() #0 {
  %1 = alloca i32, align 4
  %2 = load i32, ptr @front, align 4, !tbaa !5
  %3 = load i32, ptr @rear, align 4, !tbaa !5
  %4 = add nsw i32 %3, 1
  %5 = icmp eq i32 %2, %4
  br i1 %5, label %12, label %6

6:                                                ; preds = %0
  %7 = load i32, ptr @front, align 4, !tbaa !5
  %8 = icmp eq i32 %7, 0
  br i1 %8, label %9, label %13

9:                                                ; preds = %6
  %10 = load i32, ptr @rear, align 4, !tbaa !5
  %11 = icmp eq i32 %10, 4
  br i1 %11, label %12, label %13

12:                                               ; preds = %9, %0
  store i32 1, ptr %1, align 4
  br label %14

13:                                               ; preds = %9, %6
  store i32 0, ptr %1, align 4
  br label %14

14:                                               ; preds = %13, %12
  %15 = load i32, ptr %1, align 4
  ret i32 %15
}

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"}


; 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"

@front = external dso_local local_unnamed_addr global i32, align 4
@rear = external dso_local local_unnamed_addr global i32, align 4

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(read, argmem: none, inaccessiblemem: none) uwtable
define dso_local range(i32 0, 2) i32 @isFull() local_unnamed_addr #0 {
  %1 = load i32, ptr @front, align 4, !tbaa !5
  %2 = load i32, ptr @rear, align 4
  %3 = add nsw i32 %2, 1
  %4 = icmp eq i32 %1, %3
  %5 = icmp eq i32 %1, 0
  %6 = icmp eq i32 %2, 4
  %or.cond = and i1 %5, %6
  %narrow = or i1 %4, %or.cond
  %.0 = zext i1 %narrow to i32
  ret i32 %.0
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(read, 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"}


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