; LLVM IR from goldsborough/ipc-bench :: source/eventfd (eventfd-uni)

; 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.Benchmarks = type { i64, i64, i64, i64, i64, i64 }
%struct.Arguments = type { i32, i32 }

@.str.1 = external hidden unnamed_addr constant [27 x i8], align 1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: noreturn
declare void @throw(ptr noundef) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nounwind uwtable
define dso_local void @server_communicate(i32 noundef %0, ptr noundef %1) #2 {
  %3 = alloca i32, align 4
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  %6 = alloca %struct.Benchmarks, align 8
  store i32 %0, ptr %3, align 4, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #4
  call void @llvm.lifetime.start.p0(i64 48, ptr %6) #4
  call void @setup_benchmarks(ptr noundef %6)
  store i32 0, ptr %5, align 4, !tbaa !5
  br label %7

7:                                                ; preds = %20, %2
  %8 = load i32, ptr %5, align 4, !tbaa !5
  %9 = load ptr, ptr %4, align 8, !tbaa !9
  %10 = getelementptr inbounds %struct.Arguments, ptr %9, i32 0, i32 1
  %11 = load i32, ptr %10, align 4, !tbaa !11
  %12 = icmp slt i32 %8, %11
  br i1 %12, label %13, label %23

13:                                               ; preds = %7
  %14 = load i32, ptr %3, align 4, !tbaa !5
  %15 = getelementptr inbounds %struct.Benchmarks, ptr %6, i32 0, i32 1
  %16 = call i64 @read(i32 noundef %14, ptr noundef %15, i64 noundef 8)
  %17 = icmp eq i64 %16, -1
  br i1 %17, label %18, label %19

18:                                               ; preds = %13
  call void @throw(ptr noundef @.str.1) #5
  unreachable

19:                                               ; preds = %13
  call void @benchmark(ptr noundef %6)
  br label %20

20:                                               ; preds = %19
  %21 = load i32, ptr %5, align 4, !tbaa !5
  %22 = add nsw i32 %21, 1
  store i32 %22, ptr %5, align 4, !tbaa !5
  br label %7, !llvm.loop !13

23:                                               ; preds = %7
  %24 = load ptr, ptr %4, align 8, !tbaa !9
  %25 = getelementptr inbounds %struct.Arguments, ptr %24, i32 0, i32 0
  store i32 1, ptr %25, align 4, !tbaa !15
  %26 = load ptr, ptr %4, align 8, !tbaa !9
  call void @evaluate(ptr noundef %6, ptr noundef %26)
  call void @llvm.lifetime.end.p0(i64 48, ptr %6) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #4
  ret void
}

declare void @setup_benchmarks(ptr noundef) #3

declare i64 @read(i32 noundef, ptr noundef, i64 noundef) #3

declare void @benchmark(ptr noundef) #3

declare void @evaluate(ptr noundef, ptr noundef) #3

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { noreturn "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 #2 = { 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 #3 = { "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 #4 = { nounwind }
attributes #5 = { noreturn }

!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}
!11 = !{!12, !6, i64 4}
!12 = !{!"Arguments", !6, i64 0, !6, i64 4}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}
!15 = !{!12, !6, 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"

%struct.Benchmarks = type { i64, i64, i64, i64, i64, i64 }

@.str.1 = external hidden unnamed_addr constant [27 x i8], align 1

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: noreturn
declare void @throw(ptr noundef) local_unnamed_addr #1

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nounwind uwtable
define dso_local void @server_communicate(i32 noundef %0, ptr noundef %1) local_unnamed_addr #2 {
  %3 = alloca %struct.Benchmarks, align 8
  call void @llvm.lifetime.start.p0(i64 48, ptr nonnull %3) #5
  call void @setup_benchmarks(ptr noundef nonnull %3) #5
  %4 = getelementptr inbounds i8, ptr %1, i64 4
  %5 = load i32, ptr %4, align 4, !tbaa !5
  %6 = icmp sgt i32 %5, 0
  br i1 %6, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %2
  %7 = getelementptr inbounds i8, ptr %3, i64 8
  br label %8

8:                                                ; preds = %.lr.ph, %12
  %.05 = phi i32 [ 0, %.lr.ph ], [ %13, %12 ]
  %9 = call i64 @read(i32 noundef %0, ptr noundef nonnull %7, i64 noundef 8) #5
  %10 = icmp eq i64 %9, -1
  br i1 %10, label %11, label %12

11:                                               ; preds = %8
  call void @throw(ptr noundef nonnull @.str.1) #6
  unreachable

12:                                               ; preds = %8
  call void @benchmark(ptr noundef nonnull %3) #5
  %13 = add nuw nsw i32 %.05, 1
  %14 = load i32, ptr %4, align 4, !tbaa !5
  %15 = icmp slt i32 %13, %14
  br i1 %15, label %8, label %._crit_edge, !llvm.loop !10

._crit_edge:                                      ; preds = %12, %2
  store i32 1, ptr %1, align 4, !tbaa !12
  call void @evaluate(ptr noundef nonnull %3, ptr noundef nonnull %1) #5
  call void @llvm.lifetime.end.p0(i64 48, ptr nonnull %3) #5
  ret void
}

declare void @setup_benchmarks(ptr noundef) local_unnamed_addr #3

; Function Attrs: nofree
declare noundef i64 @read(i32 noundef, ptr nocapture noundef, i64 noundef) local_unnamed_addr #4

declare void @benchmark(ptr noundef) local_unnamed_addr #3

declare void @evaluate(ptr noundef, ptr noundef) local_unnamed_addr #3

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { noreturn "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 #2 = { 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 #3 = { "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 #4 = { nofree "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 #5 = { nounwind }
attributes #6 = { noreturn nounwind }

!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 4}
!6 = !{!"Arguments", !7, i64 0, !7, i64 4}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = distinct !{!10, !11}
!11 = !{!"llvm.loop.mustprogress"}
!12 = !{!6, !7, i64 0}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass