; LLVM IR from gem5/gem5 :: ext/systemc/src/sysc/datatypes/int/sc_nbutils.ll (ZN5sc_dt16vec_mul_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 uwtable
define dso_local void @_ZN5sc_dt16vec_mul_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
  %8 = alloca i32, align 4
  %9 = 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) #3
  store i32 0, ptr %7, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #3
  store i32 0, ptr %8, align 4, !tbaa !5
  br label %10

10:                                               ; preds = %52, %3
  %11 = load i32, ptr %8, align 4, !tbaa !5
  %12 = load i32, ptr %4, align 4, !tbaa !5
  %13 = icmp slt i32 %11, %12
  br i1 %13, label %15, label %14

14:                                               ; preds = %10
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #3
  br label %55

15:                                               ; preds = %10
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #3
  %16 = load i32, ptr %6, align 4, !tbaa !5
  %17 = load ptr, ptr %5, align 8, !tbaa !9
  %18 = load i32, ptr %8, align 4, !tbaa !5
  %19 = sext i32 %18 to i64
  %20 = getelementptr inbounds i32, ptr %17, i64 %19
  %21 = load i32, ptr %20, align 4, !tbaa !5
  %22 = call noundef i32 @_ZN5sc_dt8low_halfEj(i32 noundef %21)
  %23 = mul i32 %16, %22
  %24 = load i32, ptr %7, align 4, !tbaa !5
  %25 = call noundef i32 @_ZN5sc_dt8low_halfEj(i32 noundef %24)
  %26 = add i32 %23, %25
  store i32 %26, ptr %9, align 4, !tbaa !5
  %27 = load i32, ptr %6, align 4, !tbaa !5
  %28 = load ptr, ptr %5, align 8, !tbaa !9
  %29 = load i32, ptr %8, align 4, !tbaa !5
  %30 = sext i32 %29 to i64
  %31 = getelementptr inbounds i32, ptr %28, i64 %30
  %32 = load i32, ptr %31, align 4, !tbaa !5
  %33 = call noundef i32 @_ZN5sc_dt9high_halfEj(i32 noundef %32)
  %34 = mul i32 %27, %33
  %35 = load i32, ptr %9, align 4, !tbaa !5
  %36 = call noundef i32 @_ZN5sc_dt9high_halfEj(i32 noundef %35)
  %37 = add i32 %34, %36
  %38 = load i32, ptr %7, align 4, !tbaa !5
  %39 = call noundef i32 @_ZN5sc_dt9high_halfEj(i32 noundef %38)
  %40 = add i32 %37, %39
  store i32 %40, ptr %7, align 4, !tbaa !5
  %41 = load i32, ptr %7, align 4, !tbaa !5
  %42 = call noundef i32 @_ZN5sc_dt8low_halfEj(i32 noundef %41)
  %43 = load i32, ptr %9, align 4, !tbaa !5
  %44 = call noundef i32 @_ZN5sc_dt8low_halfEj(i32 noundef %43)
  %45 = call noundef i32 @_ZN5sc_dt6concatEjj(i32 noundef %42, i32 noundef %44)
  %46 = load ptr, ptr %5, align 8, !tbaa !9
  %47 = load i32, ptr %8, align 4, !tbaa !5
  %48 = sext i32 %47 to i64
  %49 = getelementptr inbounds i32, ptr %46, i64 %48
  store i32 %45, ptr %49, align 4, !tbaa !5
  %50 = load i32, ptr %7, align 4, !tbaa !5
  %51 = call noundef i32 @_ZN5sc_dt9high_halfEj(i32 noundef %50)
  store i32 %51, ptr %7, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #3
  br label %52

52:                                               ; preds = %15
  %53 = load i32, ptr %8, align 4, !tbaa !5
  %54 = add nsw i32 %53, 1
  store i32 %54, ptr %8, align 4, !tbaa !5
  br label %10, !llvm.loop !11

55:                                               ; preds = %14
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #3
  ret void
}

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef i32 @_ZN5sc_dt8low_halfEj(i32 noundef) #2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef i32 @_ZN5sc_dt9high_halfEj(i32 noundef) #2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef i32 @_ZN5sc_dt6concatEjj(i32 noundef, i32 noundef) #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 = { inlinehint 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 #3 = { 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 nounwind uwtable
define dso_local void @_ZN5sc_dt16vec_mul_small_onEiPjj(i32 noundef %0, ptr nocapture noundef %1, i32 noundef %2) local_unnamed_addr #0 {
  %4 = icmp sgt i32 %0, 0
  br i1 %4, label %.lr.ph.preheader, label %._crit_edge

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

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

.lr.ph:                                           ; preds = %.lr.ph.preheader, %.lr.ph
  %indvars.iv = phi i64 [ 0, %.lr.ph.preheader ], [ %indvars.iv.next, %.lr.ph ]
  %.018 = phi i32 [ 0, %.lr.ph.preheader ], [ %21, %.lr.ph ]
  %5 = getelementptr inbounds i32, ptr %1, i64 %indvars.iv
  %6 = load i32, ptr %5, align 4, !tbaa !5
  %7 = tail call noundef i32 @_ZN5sc_dt8low_halfEj(i32 noundef %6)
  %8 = mul i32 %7, %2
  %9 = tail call noundef i32 @_ZN5sc_dt8low_halfEj(i32 noundef %.018)
  %10 = add i32 %8, %9
  %11 = load i32, ptr %5, align 4, !tbaa !5
  %12 = tail call noundef i32 @_ZN5sc_dt9high_halfEj(i32 noundef %11)
  %13 = mul i32 %12, %2
  %14 = tail call noundef i32 @_ZN5sc_dt9high_halfEj(i32 noundef %10)
  %15 = add i32 %13, %14
  %16 = tail call noundef i32 @_ZN5sc_dt9high_halfEj(i32 noundef %.018)
  %17 = add i32 %15, %16
  %18 = tail call noundef i32 @_ZN5sc_dt8low_halfEj(i32 noundef %17)
  %19 = tail call noundef i32 @_ZN5sc_dt8low_halfEj(i32 noundef %10)
  %20 = tail call noundef i32 @_ZN5sc_dt6concatEjj(i32 noundef %18, i32 noundef %19)
  store i32 %20, ptr %5, align 4, !tbaa !5
  %21 = tail call noundef i32 @_ZN5sc_dt9high_halfEj(i32 noundef %17)
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next, %wide.trip.count
  br i1 %exitcond.not, label %._crit_edge, label %.lr.ph, !llvm.loop !9
}

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef i32 @_ZN5sc_dt8low_halfEj(i32 noundef) local_unnamed_addr #1

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef i32 @_ZN5sc_dt9high_halfEj(i32 noundef) local_unnamed_addr #1

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef i32 @_ZN5sc_dt6concatEjj(i32 noundef, i32 noundef) local_unnamed_addr #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 = { inlinehint 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" }

!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,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass