; LLVM IR from intel/qpl :: sources/middle-layer/util/awaiter.ll (ZN3qpl2ml7awaiterD2Ev)

; 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.qpl::ml::awaiter" = type <{ ptr, i32, i8, [3 x i8], i32, [4 x i8] }>

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_ZN3qpl2ml7awaiterD2Ev(ptr noundef nonnull align 8 dereferenceable(24) %0) unnamed_addr #0 align 2 {
  %2 = alloca ptr, align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  %3 = load ptr, ptr %2, align 8
  %4 = getelementptr inbounds %"class.qpl::ml::awaiter", ptr %3, i32 0, i32 1
  %5 = getelementptr inbounds %"class.qpl::ml::awaiter", ptr %3, i32 0, i32 4
  br label %6

6:                                                ; preds = %15, %1
  %7 = getelementptr inbounds %"class.qpl::ml::awaiter", ptr %3, i32 0, i32 2
  %8 = load i8, ptr %7, align 4, !tbaa !9
  %9 = zext i8 %8 to i32
  %10 = getelementptr inbounds %"class.qpl::ml::awaiter", ptr %3, i32 0, i32 0
  %11 = load ptr, ptr %10, align 8, !tbaa !12
  %12 = load volatile i8, ptr %11, align 1, !tbaa !13
  %13 = zext i8 %12 to i32
  %14 = icmp eq i32 %9, %13
  br i1 %14, label %15, label %16

15:                                               ; preds = %6
  call void @llvm.x86.sse2.pause()
  br label %6, !llvm.loop !14

16:                                               ; preds = %6
  ret void
}

; Function Attrs: nounwind
declare void @llvm.x86.sse2.pause() #1

attributes #0 = { 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 #1 = { 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, !7, i64 12}
!10 = !{!"_ZTSN3qpl2ml7awaiterE", !6, i64 0, !11, i64 8, !7, i64 12, !11, i64 16}
!11 = !{!"int", !7, i64 0}
!12 = !{!10, !6, i64 0}
!13 = !{!7, !7, i64 0}
!14 = distinct !{!14, !15}
!15 = !{!"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: mustprogress nounwind uwtable
define dso_local void @_ZN3qpl2ml7awaiterD2Ev(ptr nocapture noundef nonnull readonly align 8 dereferenceable(24) %0) unnamed_addr #0 align 2 {
  %2 = getelementptr inbounds i8, ptr %0, i64 12
  %3 = load i8, ptr %2, align 4, !tbaa !5
  %4 = load ptr, ptr %0, align 8, !tbaa !11
  %5 = load volatile i8, ptr %4, align 1, !tbaa !12
  %6 = icmp eq i8 %3, %5
  br i1 %6, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %1, %.lr.ph
  tail call void @llvm.x86.sse2.pause()
  %7 = load i8, ptr %2, align 4, !tbaa !5
  %8 = load ptr, ptr %0, align 8, !tbaa !11
  %9 = load volatile i8, ptr %8, align 1, !tbaa !12
  %10 = icmp eq i8 %7, %9
  br i1 %10, label %.lr.ph, label %._crit_edge, !llvm.loop !13

._crit_edge:                                      ; preds = %.lr.ph, %1
  ret void
}

; Function Attrs: nounwind
declare void @llvm.x86.sse2.pause() #1

attributes #0 = { 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 #1 = { 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, !8, i64 12}
!6 = !{!"_ZTSN3qpl2ml7awaiterE", !7, i64 0, !10, i64 8, !8, i64 12, !10, i64 16}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!"int", !8, i64 0}
!11 = !{!6, !7, i64 0}
!12 = !{!8, !8, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}


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