; LLVM IR from gem5/gem5 :: ext/systemc/src/sysc/datatypes/int/sc_nbutils.ll (ZN5sc_dt16vec_add_small_onEiPjj)

; 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"

; 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 nounwind uwtable
define dso_local void @_ZN5sc_dt16vec_add_small_onEiPjj(i32 noundef %0, ptr noundef %1, i32 noundef %2) #1 {
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  store i32 %0, ptr %4, align 4, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !9
  store i32 %2, ptr %6, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #2
  store i32 0, ptr %7, align 4, !tbaa !5
  br label %8

8:                                                ; preds = %17, %3
  %9 = load i32, ptr %6, align 4, !tbaa !5
  %10 = icmp ne i32 %9, 0
  br i1 %10, label %11, label %15

11:                                               ; preds = %8
  %12 = load i32, ptr %7, align 4, !tbaa !5
  %13 = load i32, ptr %4, align 4, !tbaa !5
  %14 = icmp slt i32 %12, %13
  br label %15

15:                                               ; preds = %11, %8
  %16 = phi i1 [ false, %8 ], [ %14, %11 ]
  br i1 %16, label %17, label %36

17:                                               ; preds = %15
  %18 = load ptr, ptr %5, align 8, !tbaa !9
  %19 = load i32, ptr %7, align 4, !tbaa !5
  %20 = sext i32 %19 to i64
  %21 = getelementptr inbounds i32, ptr %18, i64 %20
  %22 = load i32, ptr %21, align 4, !tbaa !5
  %23 = load i32, ptr %6, align 4, !tbaa !5
  %24 = add i32 %23, %22
  store i32 %24, ptr %6, align 4, !tbaa !5
  %25 = load i32, ptr %6, align 4, !tbaa !5
  %26 = zext i32 %25 to i64
  %27 = and i64 %26, 1073741823
  %28 = trunc i64 %27 to i32
  %29 = load ptr, ptr %5, align 8, !tbaa !9
  %30 = load i32, ptr %7, align 4, !tbaa !5
  %31 = add nsw i32 %30, 1
  store i32 %31, ptr %7, align 4, !tbaa !5
  %32 = sext i32 %30 to i64
  %33 = getelementptr inbounds i32, ptr %29, i64 %32
  store i32 %28, ptr %33, align 4, !tbaa !5
  %34 = load i32, ptr %6, align 4, !tbaa !5
  %35 = lshr i32 %34, 30
  store i32 %35, ptr %6, align 4, !tbaa !5
  br label %8, !llvm.loop !11

36:                                               ; preds = %15
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #2
  ret void
}

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 = { 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 = !{!"any pointer", !7, 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 nofree norecurse nosync nounwind memory(argmem: readwrite) uwtable
define dso_local void @_ZN5sc_dt16vec_add_small_onEiPjj(i32 noundef %0, ptr nocapture noundef %1, i32 noundef %2) local_unnamed_addr #0 {
  %4 = icmp ne i32 %2, 0
  %5 = icmp sgt i32 %0, 0
  %6 = and i1 %4, %5
  br i1 %6, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %3
  %7 = zext nneg i32 %0 to i64
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.preheader, %.lr.ph
  %indvars.iv = phi i64 [ 0, %.lr.ph.preheader ], [ %indvars.iv.next, %.lr.ph ]
  %.0910 = phi i32 [ %2, %.lr.ph.preheader ], [ %12, %.lr.ph ]
  %8 = getelementptr inbounds i32, ptr %1, i64 %indvars.iv
  %9 = load i32, ptr %8, align 4, !tbaa !5
  %10 = add i32 %9, %.0910
  %11 = and i32 %10, 1073741823
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  store i32 %11, ptr %8, align 4, !tbaa !5
  %12 = lshr i32 %10, 30
  %13 = icmp ugt i32 %10, 1073741823
  %14 = icmp ult i64 %indvars.iv.next, %7
  %15 = select i1 %13, i1 %14, i1 false
  br i1 %15, label %.lr.ph, label %._crit_edge, !llvm.loop !9

._crit_edge:                                      ; preds = %.lr.ph, %3
  ret void
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind memory(argmem: readwrite) 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, !6, i64 0}
!6 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


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