; LLVM IR from yinqiwen/ardb :: src/common/thread/event_condition.ll (ZN4ardb14EventCondition4WaitEv)

; 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"

%"class.ardb::EventCondition" = type { i32, 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: mustprogress uwtable
define dso_local noundef i32 @_ZN4ardb14EventCondition4WaitEv(ptr noundef nonnull align 4 dereferenceable(12) %0) #1 align 2 {
  %2 = alloca ptr, align 8
  %3 = alloca i8, align 1
  %4 = alloca i32, align 4
  store ptr %0, ptr %2, align 8, !tbaa !5
  %5 = load ptr, ptr %2, align 8
  call void @llvm.lifetime.start.p0(i64 1, ptr %3) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #3
  br label %6

6:                                                ; preds = %12, %1
  %7 = getelementptr inbounds %"class.ardb::EventCondition", ptr %5, i32 0, i32 0
  %8 = load i32, ptr %7, align 4, !tbaa !9
  %9 = call i64 @read(i32 noundef %8, ptr noundef %3, i64 noundef 1)
  %10 = trunc i64 %9 to i32
  store i32 %10, ptr %4, align 4, !tbaa !12
  %11 = icmp ne i32 %10, 1
  br i1 %11, label %12, label %13

12:                                               ; preds = %6
  br label %6, !llvm.loop !13

13:                                               ; preds = %6
  %14 = load i8, ptr %3, align 1, !tbaa !15
  %15 = sext i8 %14 to i32
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #3
  call void @llvm.lifetime.end.p0(i64 1, ptr %3) #3
  ret i32 %15
}

declare i64 @read(i32 noundef, ptr noundef, i64 noundef) #2

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { mustprogress 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 = { "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 = { 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, !6, i64 0}
!6 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !11, i64 0}
!10 = !{!"_ZTSN4ardb14EventConditionE", !11, i64 0, !11, i64 4, !11, i64 8}
!11 = !{!"int", !7, i64 0}
!12 = !{!11, !11, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}
!15 = !{!7, !7, 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 nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

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

; Function Attrs: mustprogress nofree uwtable
define dso_local noundef range(i32 -128, 128) i32 @_ZN4ardb14EventCondition4WaitEv(ptr nocapture noundef nonnull readonly align 4 dereferenceable(12) %0) local_unnamed_addr #1 align 2 {
  %2 = alloca i8, align 1
  call void @llvm.lifetime.start.p0(i64 1, ptr nonnull %2) #3
  br label %3

3:                                                ; preds = %3, %1
  %4 = load i32, ptr %0, align 4, !tbaa !5
  %5 = call i64 @read(i32 noundef %4, ptr noundef nonnull %2, i64 noundef 1)
  %6 = and i64 %5, 4294967295
  %.not = icmp eq i64 %6, 1
  br i1 %.not, label %7, label %3, !llvm.loop !10

7:                                                ; preds = %3
  %8 = load i8, ptr %2, align 1, !tbaa !12
  %9 = sext i8 %8 to i32
  call void @llvm.lifetime.end.p0(i64 1, ptr nonnull %2) #3
  ret i32 %9
}

; Function Attrs: nofree
declare noundef i64 @read(i32 noundef, ptr nocapture noundef, i64 noundef) local_unnamed_addr #2

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { mustprogress nofree 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 = { 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 #3 = { 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 0}
!6 = !{!"_ZTSN4ardb14EventConditionE", !7, i64 0, !7, i64 4, !7, i64 8}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = distinct !{!10, !11}
!11 = !{!"llvm.loop.mustprogress"}
!12 = !{!8, !8, i64 0}


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