; LLVM IR from stan-dev/math :: lib/tbb_2020.3/src/rml/test/test_rml_mixed.ll (Z7OMPWorkv)

; 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.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 { 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 void @_Z7OMPWorkv() #1 {
  %1 = alloca %"struct.tbb::atomic", align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %1) #2
  %2 = call noundef i32 @_ZN3tbb6atomicIiEaSEi(ptr noundef nonnull align 4 dereferenceable(4) %1, i32 noundef 0)
  br label %3

3:                                                ; preds = %7, %0
  %4 = call noundef i32 @_ZNVK3tbb8internal11atomic_implIiEcviEv(ptr noundef nonnull align 4 dereferenceable(4) %1)
  %5 = icmp slt i32 %4, 2000000
  br i1 %5, label %6, label %9

6:                                                ; preds = %3
  br label %7

7:                                                ; preds = %6
  %8 = call noundef i32 @_ZN3tbb8internal27atomic_impl_with_arithmeticIiicEppEv(ptr noundef nonnull align 4 dereferenceable(4) %1)
  br label %3, !llvm.loop !5

9:                                                ; preds = %3
  call void @llvm.lifetime.end.p0(i64 4, ptr %1) #2
  ret void
}

; Function Attrs: mustprogress uwtable
declare dso_local noundef i32 @_ZN3tbb6atomicIiEaSEi(ptr noundef nonnull align 4 dereferenceable(4), i32 noundef) #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local noundef i32 @_ZNVK3tbb8internal11atomic_implIiEcviEv(ptr noundef nonnull align 4 dereferenceable(4)) #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local noundef i32 @_ZN3tbb8internal27atomic_impl_with_arithmeticIiicEppEv(ptr noundef nonnull align 4 dereferenceable(4)) #1 align 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 = { 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 = distinct !{!5, !6}
!6 = !{!"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"

%"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 { i32 }

; 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 uwtable
define dso_local void @_Z7OMPWorkv() local_unnamed_addr #1 {
  %1 = alloca %"struct.tbb::atomic", align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %1) #2
  %2 = call noundef i32 @_ZN3tbb6atomicIiEaSEi(ptr noundef nonnull align 4 dereferenceable(4) %1, i32 noundef 0)
  %3 = call noundef i32 @_ZNVK3tbb8internal11atomic_implIiEcviEv(ptr noundef nonnull align 4 dereferenceable(4) %1)
  %4 = icmp slt i32 %3, 2000000
  br i1 %4, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %0, %.lr.ph
  %5 = call noundef i32 @_ZN3tbb8internal27atomic_impl_with_arithmeticIiicEppEv(ptr noundef nonnull align 4 dereferenceable(4) %1)
  %6 = call noundef i32 @_ZNVK3tbb8internal11atomic_implIiEcviEv(ptr noundef nonnull align 4 dereferenceable(4) %1)
  %7 = icmp slt i32 %6, 2000000
  br i1 %7, label %.lr.ph, label %._crit_edge, !llvm.loop !5

._crit_edge:                                      ; preds = %.lr.ph, %0
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %1) #2
  ret void
}

; Function Attrs: mustprogress uwtable
declare dso_local noundef i32 @_ZN3tbb6atomicIiEaSEi(ptr noundef nonnull align 4 dereferenceable(4), i32 noundef) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local noundef i32 @_ZNVK3tbb8internal11atomic_implIiEcviEv(ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local noundef i32 @_ZN3tbb8internal27atomic_impl_with_arithmeticIiicEppEv(ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #1 align 2

attributes #0 = { mustprogress 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 = { 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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}


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