; LLVM IR from eclipse-threadx/threadx :: ports/risc-v64/gnu/example_build/qemu_virt (board)

; 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: nounwind uwtable
define dso_local ptr @memset(ptr noundef %0, i32 noundef %1, i64 noundef %2) #0 {
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca i64, align 8
  %8 = alloca ptr, align 8
  %9 = alloca i32, align 4
  store ptr %0, ptr %5, align 8, !tbaa !5
  store i32 %1, ptr %6, align 4, !tbaa !9
  store i64 %2, ptr %7, align 8, !tbaa !11
  %10 = load ptr, ptr %5, align 8, !tbaa !5
  %11 = icmp eq ptr %10, null
  br i1 %11, label %15, label %12

12:                                               ; preds = %3
  %13 = load i64, ptr %7, align 8, !tbaa !11
  %14 = icmp ule i64 %13, 0
  br i1 %14, label %15, label %17

15:                                               ; preds = %12, %3
  %16 = load ptr, ptr %5, align 8, !tbaa !5
  store ptr %16, ptr %4, align 8
  br label %36

17:                                               ; preds = %12
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #2
  %18 = load ptr, ptr %5, align 8, !tbaa !5
  store ptr %18, ptr %8, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #2
  store i32 0, ptr %9, align 4, !tbaa !9
  br label %19

19:                                               ; preds = %31, %17
  %20 = load i32, ptr %9, align 4, !tbaa !9
  %21 = sext i32 %20 to i64
  %22 = load i64, ptr %7, align 8, !tbaa !11
  %23 = icmp ult i64 %21, %22
  br i1 %23, label %24, label %34

24:                                               ; preds = %19
  %25 = load i32, ptr %6, align 4, !tbaa !9
  %26 = trunc i32 %25 to i8
  %27 = load ptr, ptr %8, align 8, !tbaa !5
  %28 = load i32, ptr %9, align 4, !tbaa !9
  %29 = sext i32 %28 to i64
  %30 = getelementptr inbounds i8, ptr %27, i64 %29
  store i8 %26, ptr %30, align 1, !tbaa !13
  br label %31

31:                                               ; preds = %24
  %32 = load i32, ptr %9, align 4, !tbaa !9
  %33 = add nsw i32 %32, 1
  store i32 %33, ptr %9, align 4, !tbaa !9
  br label %19, !llvm.loop !14

34:                                               ; preds = %19
  %35 = load ptr, ptr %8, align 8, !tbaa !5
  store ptr %35, ptr %4, align 8
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #2
  br label %36

36:                                               ; preds = %34, %15
  %37 = load ptr, ptr %4, align 8
  ret ptr %37
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

attributes #0 = { 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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"long", !7, 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: nofree norecurse nosync nounwind memory(argmem: write) uwtable
define dso_local noundef ptr @memset(ptr noundef returned writeonly %0, i32 noundef %1, i64 noundef %2) local_unnamed_addr #0 {
  %4 = icmp eq ptr %0, null
  %5 = icmp eq i64 %2, 0
  %or.cond = or i1 %4, %5
  br i1 %or.cond, label %.loopexit, label %iter.check

iter.check:                                       ; preds = %3
  %6 = trunc i32 %1 to i8
  %min.iters.check = icmp ult i64 %2, 8
  br i1 %min.iters.check, label %vec.epilog.scalar.ph.preheader, label %vector.main.loop.iter.check

vector.main.loop.iter.check:                      ; preds = %iter.check
  %min.iters.check18 = icmp ult i64 %2, 32
  br i1 %min.iters.check18, label %vec.epilog.ph, label %vector.ph

vector.ph:                                        ; preds = %vector.main.loop.iter.check
  %n.vec = and i64 %2, -32
  %broadcast.splatinsert = insertelement <16 x i8> poison, i8 %6, i64 0
  %broadcast.splat = shufflevector <16 x i8> %broadcast.splatinsert, <16 x i8> poison, <16 x i32> zeroinitializer
  br label %vector.body

vector.body:                                      ; preds = %vector.body, %vector.ph
  %index = phi i64 [ 0, %vector.ph ], [ %index.next, %vector.body ]
  %7 = getelementptr inbounds i8, ptr %0, i64 %index
  %8 = getelementptr inbounds i8, ptr %7, i64 16
  store <16 x i8> %broadcast.splat, ptr %7, align 1, !tbaa !5
  store <16 x i8> %broadcast.splat, ptr %8, align 1, !tbaa !5
  %index.next = add nuw i64 %index, 32
  %9 = icmp eq i64 %index.next, %n.vec
  br i1 %9, label %middle.block, label %vector.body, !llvm.loop !8

middle.block:                                     ; preds = %vector.body
  %cmp.n = icmp eq i64 %n.vec, %2
  br i1 %cmp.n, label %.loopexit, label %vec.epilog.iter.check

vec.epilog.iter.check:                            ; preds = %middle.block
  %n.vec.remaining = and i64 %2, 24
  %min.epilog.iters.check = icmp eq i64 %n.vec.remaining, 0
  br i1 %min.epilog.iters.check, label %vec.epilog.scalar.ph.preheader, label %vec.epilog.ph

vec.epilog.ph:                                    ; preds = %vector.main.loop.iter.check, %vec.epilog.iter.check
  %vec.epilog.resume.val = phi i64 [ %n.vec, %vec.epilog.iter.check ], [ 0, %vector.main.loop.iter.check ]
  %n.vec20 = and i64 %2, -8
  %broadcast.splatinsert22 = insertelement <8 x i8> poison, i8 %6, i64 0
  %broadcast.splat23 = shufflevector <8 x i8> %broadcast.splatinsert22, <8 x i8> poison, <8 x i32> zeroinitializer
  br label %vec.epilog.vector.body

vec.epilog.vector.body:                           ; preds = %vec.epilog.vector.body, %vec.epilog.ph
  %index21 = phi i64 [ %vec.epilog.resume.val, %vec.epilog.ph ], [ %index.next24, %vec.epilog.vector.body ]
  %10 = getelementptr inbounds i8, ptr %0, i64 %index21
  store <8 x i8> %broadcast.splat23, ptr %10, align 1, !tbaa !5
  %index.next24 = add nuw i64 %index21, 8
  %11 = icmp eq i64 %index.next24, %n.vec20
  br i1 %11, label %vec.epilog.middle.block, label %vec.epilog.vector.body, !llvm.loop !12

vec.epilog.middle.block:                          ; preds = %vec.epilog.vector.body
  %cmp.n25 = icmp eq i64 %n.vec20, %2
  br i1 %cmp.n25, label %.loopexit, label %vec.epilog.scalar.ph.preheader

vec.epilog.scalar.ph.preheader:                   ; preds = %vec.epilog.middle.block, %iter.check, %vec.epilog.iter.check
  %indvars.iv.ph = phi i64 [ 0, %iter.check ], [ %n.vec, %vec.epilog.iter.check ], [ %n.vec20, %vec.epilog.middle.block ]
  br label %vec.epilog.scalar.ph

vec.epilog.scalar.ph:                             ; preds = %vec.epilog.scalar.ph.preheader, %vec.epilog.scalar.ph
  %indvars.iv = phi i64 [ %indvars.iv.next, %vec.epilog.scalar.ph ], [ %indvars.iv.ph, %vec.epilog.scalar.ph.preheader ]
  %12 = getelementptr inbounds i8, ptr %0, i64 %indvars.iv
  store i8 %6, ptr %12, align 1, !tbaa !5
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next, %2
  br i1 %exitcond.not, label %.loopexit, label %vec.epilog.scalar.ph, !llvm.loop !13

.loopexit:                                        ; preds = %vec.epilog.scalar.ph, %middle.block, %vec.epilog.middle.block, %3
  ret ptr %0
}

attributes #0 = { nofree norecurse nosync nounwind memory(argmem: write) 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 = !{!"omnipotent char", !7, i64 0}
!7 = !{!"Simple C/C++ TBAA"}
!8 = distinct !{!8, !9, !10, !11}
!9 = !{!"llvm.loop.mustprogress"}
!10 = !{!"llvm.loop.isvectorized", i32 1}
!11 = !{!"llvm.loop.unroll.runtime.disable"}
!12 = distinct !{!12, !9, !10, !11}
!13 = distinct !{!13, !9, !11, !10}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopLoadEliminationPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,LoopVectorizePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass