; LLVM IR from gem5/gem5 :: src/systemc/channel/sc_semaphore.ll (ZN7sc_core12sc_semaphore4waitEv)

; 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.sc_core::sc_semaphore" = type { %"class.sc_core::sc_semaphore_if", %"class.sc_core::sc_object", i32, %"class.sc_gem5::InternalScEvent" }
%"class.sc_core::sc_semaphore_if" = type { %"class.sc_core::sc_interface" }
%"class.sc_core::sc_interface" = type { ptr }
%"class.sc_core::sc_object" = type { ptr, ptr }
%"class.sc_gem5::InternalScEvent" = type { %"class.sc_core::sc_event" }
%"class.sc_core::sc_event" = type { ptr }

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_ZN7sc_core12sc_semaphore4waitEv(ptr noundef nonnull align 8 dereferenceable(40) %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
  br label %4

4:                                                ; preds = %10, %1
  %5 = load ptr, ptr %3, align 8, !tbaa !9
  %6 = getelementptr inbounds ptr, ptr %5, i64 5
  %7 = load ptr, ptr %6, align 8
  %8 = call noundef i32 %7(ptr noundef nonnull align 8 dereferenceable(40) %3)
  %9 = icmp eq i32 %8, -1
  br i1 %9, label %10, label %12

10:                                               ; preds = %4
  %11 = getelementptr inbounds %"class.sc_core::sc_semaphore", ptr %3, i32 0, i32 3
  call void @_ZN7sc_core4waitERKNS_8sc_eventE(ptr noundef nonnull align 8 dereferenceable(8) %11)
  br label %4, !llvm.loop !11

12:                                               ; preds = %4
  ret i32 0
}

declare void @_ZN7sc_core4waitERKNS_8sc_eventE(ptr noundef nonnull align 8 dereferenceable(8)) #1

attributes #0 = { 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 #1 = { "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" }

!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 = !{!"vtable pointer", !8, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"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 uwtable
define dso_local noundef i32 @_ZN7sc_core12sc_semaphore4waitEv(ptr noundef nonnull align 8 dereferenceable(40) %0) unnamed_addr #0 align 2 {
  %2 = load ptr, ptr %0, align 8, !tbaa !5
  %3 = getelementptr inbounds i8, ptr %2, i64 40
  %4 = load ptr, ptr %3, align 8
  %5 = tail call noundef i32 %4(ptr noundef nonnull align 8 dereferenceable(40) %0)
  %6 = icmp eq i32 %5, -1
  br i1 %6, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %1
  %7 = getelementptr inbounds i8, ptr %0, i64 32
  br label %8

8:                                                ; preds = %.lr.ph, %8
  tail call void @_ZN7sc_core4waitERKNS_8sc_eventE(ptr noundef nonnull align 8 dereferenceable(8) %7)
  %9 = load ptr, ptr %0, align 8, !tbaa !5
  %10 = getelementptr inbounds i8, ptr %9, i64 40
  %11 = load ptr, ptr %10, align 8
  %12 = tail call noundef i32 %11(ptr noundef nonnull align 8 dereferenceable(40) %0)
  %13 = icmp eq i32 %12, -1
  br i1 %13, label %8, label %._crit_edge, !llvm.loop !8

._crit_edge:                                      ; preds = %8, %1
  ret i32 0
}

declare void @_ZN7sc_core4waitERKNS_8sc_eventE(ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #1

attributes #0 = { 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 #1 = { "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" }

!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 = !{!"vtable pointer", !7, i64 0}
!7 = !{!"Simple C++ TBAA"}
!8 = distinct !{!8, !9}
!9 = !{!"llvm.loop.mustprogress"}


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