; LLVM IR from div-bargali/Data-Structures-and-Algorithms :: C/Data-Structures/Queue (Priority_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"

@rear = external dso_local global i32, align 4
@front = external dso_local global i32, align 4
@pri_que = external dso_local global [5 x i32], align 16
@.str.12 = external hidden unnamed_addr constant [16 x i8], align 1
@.str.13 = external hidden unnamed_addr constant [5 x i8], align 1

declare i32 @printf(ptr noundef, ...) #0

; Function Attrs: nounwind uwtable
define dso_local void @display_pqueue() #1 {
  %1 = load i32, ptr @front, align 4, !tbaa !5
  %2 = icmp eq i32 %1, -1
  br i1 %2, label %3, label %8

3:                                                ; preds = %0
  %4 = load i32, ptr @rear, align 4, !tbaa !5
  %5 = icmp eq i32 %4, -1
  br i1 %5, label %6, label %8

6:                                                ; preds = %3
  %7 = call i32 (ptr, ...) @printf(ptr noundef @.str.12)
  br label %23

8:                                                ; preds = %3, %0
  br label %9

9:                                                ; preds = %19, %8
  %10 = load i32, ptr @front, align 4, !tbaa !5
  %11 = load i32, ptr @rear, align 4, !tbaa !5
  %12 = icmp sle i32 %10, %11
  br i1 %12, label %13, label %22

13:                                               ; preds = %9
  %14 = load i32, ptr @front, align 4, !tbaa !5
  %15 = sext i32 %14 to i64
  %16 = getelementptr inbounds [5 x i32], ptr @pri_que, i64 0, i64 %15
  %17 = load i32, ptr %16, align 4, !tbaa !5
  %18 = call i32 (ptr, ...) @printf(ptr noundef @.str.13, i32 noundef %17)
  br label %19

19:                                               ; preds = %13
  %20 = load i32, ptr @front, align 4, !tbaa !5
  %21 = add nsw i32 %20, 1
  store i32 %21, ptr @front, align 4, !tbaa !5
  br label %9, !llvm.loop !9

22:                                               ; preds = %9
  store i32 0, ptr @front, align 4, !tbaa !5
  br label %23

23:                                               ; preds = %22, %6
  ret void
}

attributes #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 = { 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 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


; 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"

@rear = external dso_local local_unnamed_addr global i32, align 4
@front = external dso_local local_unnamed_addr global i32, align 4
@pri_que = external dso_local local_unnamed_addr global [5 x i32], align 16
@.str.12 = external hidden unnamed_addr constant [16 x i8], align 1
@.str.13 = external hidden unnamed_addr constant [5 x i8], align 1

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #0

; Function Attrs: nofree nounwind uwtable
define dso_local void @display_pqueue() local_unnamed_addr #1 {
  %1 = load i32, ptr @front, align 4, !tbaa !5
  %2 = icmp eq i32 %1, -1
  %3 = load i32, ptr @rear, align 4
  %4 = icmp eq i32 %3, -1
  %or.cond = select i1 %2, i1 %4, i1 false
  br i1 %or.cond, label %5, label %.preheader

.preheader:                                       ; preds = %0
  %.not2 = icmp sgt i32 %1, %3
  br i1 %.not2, label %._crit_edge, label %.lr.ph

5:                                                ; preds = %0
  %6 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.12)
  br label %15

.lr.ph:                                           ; preds = %.preheader, %.lr.ph
  %7 = phi i32 [ %13, %.lr.ph ], [ %1, %.preheader ]
  %8 = sext i32 %7 to i64
  %9 = getelementptr inbounds [5 x i32], ptr @pri_que, i64 0, i64 %8
  %10 = load i32, ptr %9, align 4, !tbaa !5
  %11 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.13, i32 noundef %10)
  %12 = load i32, ptr @front, align 4, !tbaa !5
  %13 = add nsw i32 %12, 1
  store i32 %13, ptr @front, align 4, !tbaa !5
  %14 = load i32, ptr @rear, align 4, !tbaa !5
  %.not.not = icmp slt i32 %12, %14
  br i1 %.not.not, label %.lr.ph, label %._crit_edge, !llvm.loop !9

._crit_edge:                                      ; preds = %.lr.ph, %.preheader
  store i32 0, ptr @front, align 4, !tbaa !5
  br label %15

15:                                               ; preds = %._crit_edge, %5
  ret void
}

attributes #0 = { nofree nounwind "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 = { nofree 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 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SimplifyCFGPass,TailCallElimPass