; LLVM IR from gem5/gem5 :: ext/systemc/src/sysc/datatypes/int/sc_unsigned.ll (ZNK5sc_dt11sc_unsigned10xor_reduceEv)

; 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_dt::sc_unsigned" = type { %"class.sc_dt::sc_value_base", i32, i32, i32, ptr }
%"class.sc_dt::sc_value_base" = type { ptr }

; 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 noundef zeroext i1 @_ZNK5sc_dt11sc_unsigned10xor_reduceEv(ptr noundef nonnull align 8 dereferenceable(32) %0) #1 align 2 {
  %2 = alloca ptr, align 8
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  store ptr %0, ptr %2, align 8, !tbaa !5
  %5 = load ptr, ptr %2, align 8
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #2
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #2
  store i32 0, ptr %4, align 4, !tbaa !9
  store i32 0, ptr %3, align 4, !tbaa !9
  br label %6

6:                                                ; preds = %19, %1
  %7 = load i32, ptr %3, align 4, !tbaa !9
  %8 = getelementptr inbounds %"class.sc_dt::sc_unsigned", ptr %5, i32 0, i32 2
  %9 = load i32, ptr %8, align 4, !tbaa !11
  %10 = sub nsw i32 %9, 1
  %11 = icmp slt i32 %7, %10
  br i1 %11, label %12, label %22

12:                                               ; preds = %6
  %13 = load i32, ptr %3, align 4, !tbaa !9
  %14 = call noundef zeroext i1 @_ZNK5sc_dt11sc_unsigned4testEi(ptr noundef nonnull align 8 dereferenceable(32) %5, i32 noundef %13)
  br i1 %14, label %15, label %18

15:                                               ; preds = %12
  %16 = load i32, ptr %4, align 4, !tbaa !9
  %17 = xor i32 %16, -1
  store i32 %17, ptr %4, align 4, !tbaa !9
  br label %18

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

19:                                               ; preds = %18
  %20 = load i32, ptr %3, align 4, !tbaa !9
  %21 = add nsw i32 %20, 1
  store i32 %21, ptr %3, align 4, !tbaa !9
  br label %6, !llvm.loop !14

22:                                               ; preds = %6
  %23 = load i32, ptr %4, align 4, !tbaa !9
  %24 = icmp ne i32 %23, 0
  %25 = zext i1 %24 to i64
  %26 = select i1 %24, i1 true, i1 false
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #2
  ret i1 %26
}

; Function Attrs: mustprogress uwtable
declare dso_local noundef zeroext i1 @_ZNK5sc_dt11sc_unsigned4testEi(ptr noundef nonnull align 8 dereferenceable(32), i32 noundef) #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 = !{!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 = !{!12, !10, i64 12}
!12 = !{!"_ZTSN5sc_dt11sc_unsignedE", !13, i64 0, !10, i64 8, !10, i64 12, !10, i64 16, !6, i64 24}
!13 = !{!"_ZTSN5sc_dt13sc_value_baseE"}
!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 uwtable
define dso_local noundef zeroext i1 @_ZNK5sc_dt11sc_unsigned10xor_reduceEv(ptr noundef nonnull align 8 dereferenceable(32) %0) local_unnamed_addr #0 align 2 {
  %2 = getelementptr inbounds i8, ptr %0, i64 12
  %3 = load i32, ptr %2, align 4, !tbaa !5
  %4 = icmp sgt i32 %3, 1
  br i1 %4, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %1, %.lr.ph
  %.07 = phi i32 [ %spec.select, %.lr.ph ], [ 0, %1 ]
  %.056 = phi i32 [ %7, %.lr.ph ], [ 0, %1 ]
  %5 = tail call noundef zeroext i1 @_ZNK5sc_dt11sc_unsigned4testEi(ptr noundef nonnull align 8 dereferenceable(32) %0, i32 noundef %.056)
  %6 = sext i1 %5 to i32
  %spec.select = xor i32 %.07, %6
  %7 = add nuw nsw i32 %.056, 1
  %8 = load i32, ptr %2, align 4, !tbaa !5
  %9 = add nsw i32 %8, -1
  %10 = icmp slt i32 %7, %9
  br i1 %10, label %.lr.ph, label %._crit_edge.loopexit, !llvm.loop !12

._crit_edge.loopexit:                             ; preds = %.lr.ph
  %11 = icmp ne i32 %.07, %6
  br label %._crit_edge

._crit_edge:                                      ; preds = %._crit_edge.loopexit, %1
  %.0.lcssa = phi i1 [ false, %1 ], [ %11, %._crit_edge.loopexit ]
  ret i1 %.0.lcssa
}

; Function Attrs: mustprogress uwtable
declare dso_local noundef zeroext i1 @_ZNK5sc_dt11sc_unsigned4testEi(ptr noundef nonnull align 8 dereferenceable(32), i32 noundef) local_unnamed_addr #0 align 2

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" }

!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 = !{!"_ZTSN5sc_dt11sc_unsignedE", !7, i64 0, !8, i64 8, !8, i64 12, !8, i64 16, !11, i64 24}
!7 = !{!"_ZTSN5sc_dt13sc_value_baseE"}
!8 = !{!"int", !9, i64 0}
!9 = !{!"omnipotent char", !10, i64 0}
!10 = !{!"Simple C++ TBAA"}
!11 = !{!"any pointer", !9, i64 0}
!12 = distinct !{!12, !13}
!13 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,LCSSAPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass