; LLVM IR from stan-dev/math :: lib/tbb_2020.3/src/test/test_rwm_upgrade_downgrade.ll (Z8TestMainv)

; 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.Harness::internal::Tracer" = type <{ i32, [4 x i8], ptr, ptr, i64, [8 x i8] }>
%"class.tbb::queuing_rw_mutex" = type { %"struct.tbb::atomic" }
%"struct.tbb::atomic" = type { %"struct.tbb::internal::atomic_impl_with_arithmetic" }
%"struct.tbb::internal::atomic_impl_with_arithmetic" = type { %"struct.tbb::internal::atomic_impl" }
%"struct.tbb::internal::atomic_impl" = type { %"struct.tbb::internal::aligned_storage" }
%"struct.tbb::internal::aligned_storage" = type { ptr }
%"class.tbb::spin_rw_mutex_v3" = type { i64 }
%struct.Hammer = type <{ ptr, i32, [4 x i8] }>
%struct.Hammer.0 = type <{ ptr, i32, [4 x i8] }>

@_ZN7Harness8internalL6tracerE = external hidden global %"class.Harness::internal::Tracer", align 8
@Count = external dso_local global i32, align 4
@QRW_mutex = external dso_local global %"class.tbb::queuing_rw_mutex", align 8
@SRW_mutex = external dso_local global %"class.tbb::spin_rw_mutex_v3", align 8
@_ZL9MinThread = external hidden global i32, align 4
@_ZL9MaxThread = external hidden global i32, align 4
@_ZL7Verbose = external hidden global i8, align 1
@.str.19 = external hidden unnamed_addr constant [102 x i8], align 1
@__FUNCTION__._Z8TestMainv = external hidden unnamed_addr constant [9 x i8], align 1
@.str.20 = external hidden unnamed_addr constant [22 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: mustprogress nounwind uwtable
declare dso_local noundef ptr @_ZN7Harness8internal6Tracer14set_trace_infoEiPKcmS3_(ptr noundef nonnull align 8 dereferenceable(33), i32 noundef, ptr noundef, i64 noundef, ptr noundef) #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN7Harness8internal6Tracer5traceEPKcz(ptr noundef nonnull align 8 dereferenceable(33), ptr noundef, ...) #2 align 2

; 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 @_Z8TestMainv() #2 {
  %1 = alloca i32, align 4
  %2 = alloca %struct.Hammer, align 8
  %3 = alloca %struct.Hammer.0, align 8
  call void @llvm.lifetime.start.p0(i64 4, ptr %1) #3
  %4 = load i32, ptr @_ZL9MinThread, align 4, !tbaa !5
  store i32 %4, ptr %1, align 4, !tbaa !5
  br label %5

5:                                                ; preds = %20, %0
  %6 = load i32, ptr %1, align 4, !tbaa !5
  %7 = load i32, ptr @_ZL9MaxThread, align 4, !tbaa !5
  %8 = icmp sle i32 %6, %7
  br i1 %8, label %10, label %9

9:                                                ; preds = %5
  call void @llvm.lifetime.end.p0(i64 4, ptr %1) #3
  br label %23

10:                                               ; preds = %5
  %11 = load i8, ptr @_ZL7Verbose, align 1, !tbaa !9, !range !11, !noundef !12
  %12 = trunc i8 %11 to i1
  br i1 %12, label %14, label %13

13:                                               ; preds = %10
  br label %17

14:                                               ; preds = %10
  %15 = call noundef ptr @_ZN7Harness8internal6Tracer14set_trace_infoEiPKcmS3_(ptr noundef nonnull align 8 dereferenceable(33) @_ZN7Harness8internalL6tracerE, i32 noundef 0, ptr noundef @.str.19, i64 noundef 63, ptr noundef @__FUNCTION__._Z8TestMainv)
  %16 = load i32, ptr %1, align 4, !tbaa !5
  call void (ptr, ptr, ...) @_ZN7Harness8internal6Tracer5traceEPKcz(ptr noundef nonnull align 8 dereferenceable(33) %15, ptr noundef @.str.20, i32 noundef %16)
  br label %17

17:                                               ; preds = %14, %13
  store volatile i32 0, ptr @Count, align 4, !tbaa !5
  %18 = load i32, ptr %1, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 16, ptr %2) #3
  call void @_ZN6HammerIN3tbb16queuing_rw_mutexEEC2ERS1_(ptr noundef nonnull align 8 dereferenceable(12) %2, ptr noundef nonnull align 8 dereferenceable(8) @QRW_mutex)
  call void @_Z17NativeParallelForIi6HammerIN3tbb16queuing_rw_mutexEEEvT_RKT0_(i32 noundef %18, ptr noundef nonnull align 8 dereferenceable(12) %2)
  call void @llvm.lifetime.end.p0(i64 16, ptr %2) #3
  store volatile i32 0, ptr @Count, align 4, !tbaa !5
  %19 = load i32, ptr %1, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 16, ptr %3) #3
  call void @_ZN6HammerIN3tbb16spin_rw_mutex_v3EEC2ERS1_(ptr noundef nonnull align 8 dereferenceable(12) %3, ptr noundef nonnull align 8 dereferenceable(8) @SRW_mutex)
  call void @_Z17NativeParallelForIi6HammerIN3tbb16spin_rw_mutex_v3EEEvT_RKT0_(i32 noundef %19, ptr noundef nonnull align 8 dereferenceable(12) %3)
  call void @llvm.lifetime.end.p0(i64 16, ptr %3) #3
  br label %20

20:                                               ; preds = %17
  %21 = load i32, ptr %1, align 4, !tbaa !5
  %22 = add nsw i32 %21, 1
  store i32 %22, ptr %1, align 4, !tbaa !5
  br label %5, !llvm.loop !13

23:                                               ; preds = %9
  ret i32 0
}

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z17NativeParallelForIi6HammerIN3tbb16queuing_rw_mutexEEEvT_RKT0_(i32 noundef, ptr noundef nonnull align 8 dereferenceable(12)) #2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN6HammerIN3tbb16queuing_rw_mutexEEC2ERS1_(ptr noundef nonnull align 8 dereferenceable(12), ptr noundef nonnull align 8 dereferenceable(8)) unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z17NativeParallelForIi6HammerIN3tbb16spin_rw_mutex_v3EEEvT_RKT0_(i32 noundef, ptr noundef nonnull align 8 dereferenceable(12)) #2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN6HammerIN3tbb16spin_rw_mutex_v3EEC2ERS1_(ptr noundef nonnull align 8 dereferenceable(12), ptr noundef nonnull align 8 dereferenceable(8)) unnamed_addr #1 align 2

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #2 = { 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 #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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"bool", !7, i64 0}
!11 = !{i8 0, i8 2}
!12 = !{}
!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"

%"class.Harness::internal::Tracer" = type <{ i32, [4 x i8], ptr, ptr, i64, [8 x i8] }>
%"class.tbb::queuing_rw_mutex" = type { %"struct.tbb::atomic" }
%"struct.tbb::atomic" = type { %"struct.tbb::internal::atomic_impl_with_arithmetic" }
%"struct.tbb::internal::atomic_impl_with_arithmetic" = type { %"struct.tbb::internal::atomic_impl" }
%"struct.tbb::internal::atomic_impl" = type { %"struct.tbb::internal::aligned_storage" }
%"struct.tbb::internal::aligned_storage" = type { ptr }
%"class.tbb::spin_rw_mutex_v3" = type { i64 }
%struct.Hammer = type <{ ptr, i32, [4 x i8] }>
%struct.Hammer.0 = type <{ ptr, i32, [4 x i8] }>

@_ZN7Harness8internalL6tracerE = external hidden global %"class.Harness::internal::Tracer", align 8
@Count = external dso_local global i32, align 4
@QRW_mutex = external dso_local global %"class.tbb::queuing_rw_mutex", align 8
@SRW_mutex = external dso_local global %"class.tbb::spin_rw_mutex_v3", align 8
@_ZL9MinThread = external hidden local_unnamed_addr global i32, align 4
@_ZL9MaxThread = external hidden local_unnamed_addr global i32, align 4
@_ZL7Verbose = external hidden local_unnamed_addr global i8, align 1
@.str.19 = external hidden unnamed_addr constant [102 x i8], align 1
@__FUNCTION__._Z8TestMainv = external hidden unnamed_addr constant [9 x i8], align 1
@.str.20 = external hidden unnamed_addr constant [22 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 nounwind uwtable
declare dso_local noundef ptr @_ZN7Harness8internal6Tracer14set_trace_infoEiPKcmS3_(ptr noundef nonnull align 8 dereferenceable(33), i32 noundef, ptr noundef, i64 noundef, ptr noundef) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN7Harness8internal6Tracer5traceEPKcz(ptr noundef nonnull align 8 dereferenceable(33), ptr noundef, ...) local_unnamed_addr #2 align 2

; 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 uwtable
define dso_local noundef i32 @_Z8TestMainv() local_unnamed_addr #2 {
  %1 = alloca %struct.Hammer, align 8
  %2 = alloca %struct.Hammer.0, align 8
  %3 = load i32, ptr @_ZL9MinThread, align 4, !tbaa !5
  %4 = load i32, ptr @_ZL9MaxThread, align 4, !tbaa !5
  %.not5 = icmp sgt i32 %3, %4
  br i1 %.not5, label %._crit_edge, label %.lr.ph

._crit_edge:                                      ; preds = %9, %0
  ret i32 0

.lr.ph:                                           ; preds = %0, %9
  %.06 = phi i32 [ %10, %9 ], [ %3, %0 ]
  %5 = load i8, ptr @_ZL7Verbose, align 1, !tbaa !9, !range !11, !noundef !12
  %6 = trunc nuw i8 %5 to i1
  br i1 %6, label %7, label %9

7:                                                ; preds = %.lr.ph
  %8 = call noundef ptr @_ZN7Harness8internal6Tracer14set_trace_infoEiPKcmS3_(ptr noundef nonnull align 8 dereferenceable(33) @_ZN7Harness8internalL6tracerE, i32 noundef 0, ptr noundef nonnull @.str.19, i64 noundef 63, ptr noundef nonnull @__FUNCTION__._Z8TestMainv)
  call void (ptr, ptr, ...) @_ZN7Harness8internal6Tracer5traceEPKcz(ptr noundef nonnull align 8 dereferenceable(33) %8, ptr noundef nonnull @.str.20, i32 noundef %.06)
  br label %9

9:                                                ; preds = %.lr.ph, %7
  store volatile i32 0, ptr @Count, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %1) #3
  call void @_ZN6HammerIN3tbb16queuing_rw_mutexEEC2ERS1_(ptr noundef nonnull align 8 dereferenceable(12) %1, ptr noundef nonnull align 8 dereferenceable(8) @QRW_mutex)
  call void @_Z17NativeParallelForIi6HammerIN3tbb16queuing_rw_mutexEEEvT_RKT0_(i32 noundef %.06, ptr noundef nonnull align 8 dereferenceable(12) %1)
  call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %1) #3
  store volatile i32 0, ptr @Count, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %2) #3
  call void @_ZN6HammerIN3tbb16spin_rw_mutex_v3EEC2ERS1_(ptr noundef nonnull align 8 dereferenceable(12) %2, ptr noundef nonnull align 8 dereferenceable(8) @SRW_mutex)
  call void @_Z17NativeParallelForIi6HammerIN3tbb16spin_rw_mutex_v3EEEvT_RKT0_(i32 noundef %.06, ptr noundef nonnull align 8 dereferenceable(12) %2)
  call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %2) #3
  %10 = add nsw i32 %.06, 1
  %11 = load i32, ptr @_ZL9MaxThread, align 4, !tbaa !5
  %.not.not = icmp slt i32 %.06, %11
  br i1 %.not.not, label %.lr.ph, label %._crit_edge, !llvm.loop !13
}

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z17NativeParallelForIi6HammerIN3tbb16queuing_rw_mutexEEEvT_RKT0_(i32 noundef, ptr noundef nonnull align 8 dereferenceable(12)) local_unnamed_addr #2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN6HammerIN3tbb16queuing_rw_mutexEEC2ERS1_(ptr noundef nonnull align 8 dereferenceable(12), ptr noundef nonnull align 8 dereferenceable(8)) unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z17NativeParallelForIi6HammerIN3tbb16spin_rw_mutex_v3EEEvT_RKT0_(i32 noundef, ptr noundef nonnull align 8 dereferenceable(12)) local_unnamed_addr #2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN6HammerIN3tbb16spin_rw_mutex_v3EEC2ERS1_(ptr noundef nonnull align 8 dereferenceable(12), ptr noundef nonnull align 8 dereferenceable(8)) unnamed_addr #1 align 2

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #2 = { 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 #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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"bool", !7, i64 0}
!11 = !{i8 0, i8 2}
!12 = !{}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}


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