; LLVM IR from jrouwe/JoltPhysics :: Jolt/Core/Semaphore.ll (ZN3JPH9Semaphore7AcquireEj)

; 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.JPH::AssertLastParam" = type { i8 }
%"class.JPH::Semaphore" = type { %"struct.std::atomic", %union.sem_t, [24 x i8] }
%"struct.std::atomic" = type { %"struct.std::__atomic_base" }
%"struct.std::__atomic_base" = type { i32 }
%union.sem_t = type { i64, [24 x i8] }

@.str.1 = external hidden unnamed_addr constant [13 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [76 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: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local noundef zeroext i1 @_ZN3JPH23AssertFailedParamHelperEPKcS1_jNS_15AssertLastParamE(ptr noundef, ptr noundef, i32 noundef) #1

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3minIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) #2

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN3JPH9Semaphore7AcquireEj(ptr noundef nonnull align 64 dereferenceable(40) %0, i32 noundef %1) #3 align 2 {
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  %5 = alloca %"struct.JPH::AssertLastParam", align 1
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  %10 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !9
  %11 = load ptr, ptr %3, align 8
  br label %12

12:                                               ; preds = %2
  %13 = load i32, ptr %4, align 4, !tbaa !9
  %14 = icmp ugt i32 %13, 0
  br i1 %14, label %18, label %15

15:                                               ; preds = %12
  %16 = call noundef zeroext i1 @_ZN3JPH23AssertFailedParamHelperEPKcS1_jNS_15AssertLastParamE(ptr noundef @.str.1, ptr noundef @.str.2, i32 noundef 104)
  br i1 %16, label %17, label %18

17:                                               ; preds = %15
  call void asm sideeffect "int $$0x3", "~{dirflag},~{fpsr},~{flags}"() #6, !srcloc !11
  br label %18

18:                                               ; preds = %17, %15, %12
  br label %19

19:                                               ; preds = %18
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #6
  %20 = getelementptr inbounds %"class.JPH::Semaphore", ptr %11, i32 0, i32 0
  %21 = load i32, ptr %4, align 4, !tbaa !9
  %22 = call noundef i32 @_ZNSt13__atomic_baseIiE9fetch_subEiSt12memory_order(ptr noundef nonnull align 4 dereferenceable(4) %20, i32 noundef %21, i32 noundef 2) #6
  store i32 %22, ptr %6, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #6
  %23 = load i32, ptr %6, align 4, !tbaa !9
  %24 = load i32, ptr %4, align 4, !tbaa !9
  %25 = sub nsw i32 %23, %24
  store i32 %25, ptr %7, align 4, !tbaa !9
  %26 = load i32, ptr %7, align 4, !tbaa !9
  %27 = icmp slt i32 %26, 0
  br i1 %27, label %28, label %45

28:                                               ; preds = %19
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #6
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #6
  store i32 0, ptr %9, align 4, !tbaa !9
  %29 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3minIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %6, ptr noundef nonnull align 4 dereferenceable(4) %9)
  %30 = load i32, ptr %29, align 4, !tbaa !9
  %31 = load i32, ptr %7, align 4, !tbaa !9
  %32 = sub nsw i32 %30, %31
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #6
  store i32 %32, ptr %8, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #6
  store i32 0, ptr %10, align 4, !tbaa !9
  br label %33

33:                                               ; preds = %41, %28
  %34 = load i32, ptr %10, align 4, !tbaa !9
  %35 = load i32, ptr %8, align 4, !tbaa !9
  %36 = icmp slt i32 %34, %35
  br i1 %36, label %38, label %37

37:                                               ; preds = %33
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #6
  br label %44

38:                                               ; preds = %33
  %39 = getelementptr inbounds %"class.JPH::Semaphore", ptr %11, i32 0, i32 1
  %40 = call i32 @sem_wait(ptr noundef %39)
  br label %41

41:                                               ; preds = %38
  %42 = load i32, ptr %10, align 4, !tbaa !9
  %43 = add nsw i32 %42, 1
  store i32 %43, ptr %10, align 4, !tbaa !9
  br label %33, !llvm.loop !12

44:                                               ; preds = %37
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #6
  br label %45

45:                                               ; preds = %44, %19
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #6
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #6
  ret void
}

; Function Attrs: alwaysinline mustprogress nounwind uwtable
declare dso_local noundef i32 @_ZNSt13__atomic_baseIiE9fetch_subEiSt12memory_order(ptr noundef nonnull align 4 dereferenceable(4), i32 noundef, i32 noundef) #4 align 2

declare i32 @sem_wait(ptr noundef) #5

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { inlinehint 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 = { inlinehint mustprogress 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 = { 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 #4 = { alwaysinline mustprogress 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 #5 = { "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 }

!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, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{i64 2156957883}
!12 = distinct !{!12, !13}
!13 = !{!"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"

@.str.1 = external hidden unnamed_addr constant [13 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [76 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: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local noundef zeroext i1 @_ZN3JPH23AssertFailedParamHelperEPKcS1_jNS_15AssertLastParamE(ptr noundef, ptr noundef, i32 noundef) local_unnamed_addr #1

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3minIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #2

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN3JPH9Semaphore7AcquireEj(ptr noundef nonnull align 64 dereferenceable(40) %0, i32 noundef %1) local_unnamed_addr #3 align 2 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %.not = icmp eq i32 %1, 0
  br i1 %.not, label %5, label %8

5:                                                ; preds = %2
  %6 = tail call noundef zeroext i1 @_ZN3JPH23AssertFailedParamHelperEPKcS1_jNS_15AssertLastParamE(ptr noundef nonnull @.str.1, ptr noundef nonnull @.str.2, i32 noundef 104)
  br i1 %6, label %7, label %8

7:                                                ; preds = %5
  tail call void asm sideeffect "int $$0x3", "~{dirflag},~{fpsr},~{flags}"() #6, !srcloc !5
  br label %8

8:                                                ; preds = %2, %5, %7
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %3) #6
  %9 = tail call noundef i32 @_ZNSt13__atomic_baseIiE9fetch_subEiSt12memory_order(ptr noundef nonnull align 4 dereferenceable(4) %0, i32 noundef %1, i32 noundef 2) #6
  store i32 %9, ptr %3, align 4, !tbaa !6
  %10 = sub nsw i32 %9, %1
  %11 = icmp slt i32 %10, 0
  br i1 %11, label %12, label %.loopexit

12:                                               ; preds = %8
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %4) #6
  store i32 0, ptr %4, align 4, !tbaa !6
  %13 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3minIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %3, ptr noundef nonnull align 4 dereferenceable(4) %4)
  %14 = load i32, ptr %13, align 4, !tbaa !6
  %15 = sub nsw i32 %14, %10
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %4) #6
  %16 = icmp sgt i32 %15, 0
  br i1 %16, label %.lr.ph, label %.loopexit

.lr.ph:                                           ; preds = %12
  %17 = getelementptr inbounds i8, ptr %0, i64 8
  br label %18

18:                                               ; preds = %.lr.ph, %18
  %.09 = phi i32 [ 0, %.lr.ph ], [ %20, %18 ]
  %19 = call i32 @sem_wait(ptr noundef nonnull %17)
  %20 = add nuw nsw i32 %.09, 1
  %exitcond.not = icmp eq i32 %20, %15
  br i1 %exitcond.not, label %.loopexit, label %18, !llvm.loop !10

.loopexit:                                        ; preds = %18, %12, %8
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %3) #6
  ret void
}

; Function Attrs: alwaysinline mustprogress nounwind uwtable
declare dso_local noundef i32 @_ZNSt13__atomic_baseIiE9fetch_subEiSt12memory_order(ptr noundef nonnull align 4 dereferenceable(4), i32 noundef, i32 noundef) local_unnamed_addr #4 align 2

declare i32 @sem_wait(ptr noundef) local_unnamed_addr #5

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { inlinehint 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 = { inlinehint mustprogress 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 = { 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 #4 = { alwaysinline mustprogress 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 #5 = { "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 }

!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 = !{i64 2156957883}
!6 = !{!7, !7, i64 0}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = distinct !{!10, !11}
!11 = !{!"llvm.loop.mustprogress"}


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