; LLVM IR from goldsborough/ipc-bench :: source/mmap (client)

; 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.Arguments = type { i32, i32 }

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

; 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
declare dso_local void @mmap_wait(ptr noundef) #1

; Function Attrs: nounwind uwtable
declare dso_local void @mmap_notify(ptr noundef) #1

; Function Attrs: nounwind uwtable
define dso_local void @communicate(ptr noundef %0, ptr noundef %1) #1 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  store ptr %0, ptr %3, align 8, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #6
  %7 = load ptr, ptr %4, align 8, !tbaa !5
  %8 = getelementptr inbounds %struct.Arguments, ptr %7, i32 0, i32 0
  %9 = load i32, ptr %8, align 4, !tbaa !9
  %10 = sext i32 %9 to i64
  %11 = call noalias ptr @malloc(i64 noundef %10) #7
  store ptr %11, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #6
  %12 = load ptr, ptr %3, align 8, !tbaa !5
  store ptr %12, ptr %6, align 8, !tbaa !5
  %13 = load ptr, ptr %6, align 8, !tbaa !5
  call void @mmap_notify(ptr noundef %13)
  br label %14

14:                                               ; preds = %33, %2
  %15 = load ptr, ptr %4, align 8, !tbaa !5
  %16 = getelementptr inbounds %struct.Arguments, ptr %15, i32 0, i32 1
  %17 = load i32, ptr %16, align 4, !tbaa !12
  %18 = icmp sgt i32 %17, 0
  br i1 %18, label %19, label %38

19:                                               ; preds = %14
  %20 = load ptr, ptr %6, align 8, !tbaa !5
  call void @mmap_wait(ptr noundef %20)
  %21 = load ptr, ptr %5, align 8, !tbaa !5
  %22 = load ptr, ptr %3, align 8, !tbaa !5
  %23 = load ptr, ptr %4, align 8, !tbaa !5
  %24 = getelementptr inbounds %struct.Arguments, ptr %23, i32 0, i32 0
  %25 = load i32, ptr %24, align 4, !tbaa !9
  %26 = sext i32 %25 to i64
  call void @llvm.memcpy.p0.p0.i64(ptr align 1 %21, ptr align 1 %22, i64 %26, i1 false)
  %27 = load ptr, ptr %3, align 8, !tbaa !5
  %28 = load ptr, ptr %4, align 8, !tbaa !5
  %29 = getelementptr inbounds %struct.Arguments, ptr %28, i32 0, i32 0
  %30 = load i32, ptr %29, align 4, !tbaa !9
  %31 = sext i32 %30 to i64
  call void @llvm.memset.p0.i64(ptr align 1 %27, i8 42, i64 %31, i1 false)
  %32 = load ptr, ptr %6, align 8, !tbaa !5
  call void @mmap_notify(ptr noundef %32)
  br label %33

33:                                               ; preds = %19
  %34 = load ptr, ptr %4, align 8, !tbaa !5
  %35 = getelementptr inbounds %struct.Arguments, ptr %34, i32 0, i32 1
  %36 = load i32, ptr %35, align 4, !tbaa !12
  %37 = add nsw i32 %36, -1
  store i32 %37, ptr %35, align 4, !tbaa !12
  br label %14, !llvm.loop !13

38:                                               ; preds = %14
  %39 = load ptr, ptr %5, align 8, !tbaa !5
  call void @free(ptr noundef %39) #6
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #6
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #6
  ret void
}

; Function Attrs: nounwind allocsize(0)
declare noalias ptr @malloc(i64 noundef) #2

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #3

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #4

; Function Attrs: nounwind
declare void @free(ptr noundef) #5

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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" }
attributes #2 = { nounwind allocsize(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 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
attributes #4 = { nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #5 = { 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 #6 = { nounwind }
attributes #7 = { nounwind allocsize(0) }

!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 0}
!10 = !{!"Arguments", !11, i64 0, !11, i64 4}
!11 = !{!"int", !7, i64 0}
!12 = !{!10, !11, i64 4}
!13 = distinct !{!13, !14}
!14 = !{!"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"

; Function Attrs: nounwind uwtable
declare dso_local void @mmap_wait(ptr noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
declare dso_local void @mmap_notify(ptr noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local void @communicate(ptr noundef %0, ptr nocapture noundef %1) local_unnamed_addr #0 {
  tail call void @mmap_notify(ptr noundef %0)
  %3 = getelementptr inbounds i8, ptr %1, i64 4
  %4 = load i32, ptr %3, align 4, !tbaa !5
  %5 = icmp sgt i32 %4, 0
  br i1 %5, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %2, %.lr.ph
  tail call void @mmap_wait(ptr noundef %0)
  %6 = load i32, ptr %1, align 4, !tbaa !10
  %7 = sext i32 %6 to i64
  tail call void @llvm.memset.p0.i64(ptr align 1 %0, i8 42, i64 %7, i1 false)
  tail call void @mmap_notify(ptr noundef %0)
  %8 = load i32, ptr %3, align 4, !tbaa !5
  %9 = add nsw i32 %8, -1
  store i32 %9, ptr %3, align 4, !tbaa !5
  %10 = icmp sgt i32 %8, 1
  br i1 %10, label %.lr.ph, label %._crit_edge, !llvm.loop !11

._crit_edge:                                      ; preds = %.lr.ph, %2
  ret void
}

; Function Attrs: mustprogress nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #1

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" }
attributes #1 = { mustprogress nocallback nofree nounwind willreturn memory(argmem: write) }

!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 = !{!6, !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}


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