; LLVM IR from ermig1979/Simd :: src/Simd/SimdBaseDescrInt.ll (ZN4Simd4Base11CorrelationILi8EEEiPKhS3_m)

; 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 noundef i32 @_ZN4Simd4Base11CorrelationILi8EEEiPKhS3_m(ptr noundef %0, ptr noundef %1, i64 noundef %2) #1 {
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i64, align 8
  %7 = alloca i32, align 4
  %8 = alloca i64, align 8
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  store i64 %2, ptr %6, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #2
  store i32 0, ptr %7, align 4, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #2
  store i64 0, ptr %8, align 8, !tbaa !9
  br label %9

9:                                                ; preds = %28, %3
  %10 = load i64, ptr %8, align 8, !tbaa !9
  %11 = load i64, ptr %6, align 8, !tbaa !9
  %12 = icmp ult i64 %10, %11
  br i1 %12, label %14, label %13

13:                                               ; preds = %9
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #2
  br label %31

14:                                               ; preds = %9
  %15 = load ptr, ptr %4, align 8, !tbaa !5
  %16 = load i64, ptr %8, align 8, !tbaa !9
  %17 = getelementptr inbounds i8, ptr %15, i64 %16
  %18 = load i8, ptr %17, align 1, !tbaa !13
  %19 = zext i8 %18 to i32
  %20 = load ptr, ptr %5, align 8, !tbaa !5
  %21 = load i64, ptr %8, align 8, !tbaa !9
  %22 = getelementptr inbounds i8, ptr %20, i64 %21
  %23 = load i8, ptr %22, align 1, !tbaa !13
  %24 = zext i8 %23 to i32
  %25 = mul nsw i32 %19, %24
  %26 = load i32, ptr %7, align 4, !tbaa !11
  %27 = add nsw i32 %26, %25
  store i32 %27, ptr %7, align 4, !tbaa !11
  br label %28

28:                                               ; preds = %14
  %29 = load i64, ptr %8, align 8, !tbaa !9
  %30 = add i64 %29, 1
  store i64 %30, ptr %8, align 8, !tbaa !9
  br label %9, !llvm.loop !14

31:                                               ; preds = %13
  %32 = load i32, ptr %7, align 4, !tbaa !11
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #2
  ret i32 %32
}

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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"long", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"int", !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: mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: read) uwtable
define dso_local noundef i32 @_ZN4Simd4Base11CorrelationILi8EEEiPKhS3_m(ptr nocapture noundef readonly %0, ptr nocapture noundef readonly %1, i64 noundef %2) local_unnamed_addr #0 {
  %.not = icmp eq i64 %2, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph.preheader

.lr.ph.preheader:                                 ; preds = %3
  %min.iters.check = icmp ult i64 %2, 8
  br i1 %min.iters.check, label %.lr.ph.preheader15, label %vector.ph

.lr.ph.preheader15:                               ; preds = %middle.block, %.lr.ph.preheader
  %.010.ph = phi i64 [ 0, %.lr.ph.preheader ], [ %n.vec, %middle.block ]
  %.089.ph = phi i32 [ 0, %.lr.ph.preheader ], [ %17, %middle.block ]
  br label %.lr.ph

vector.ph:                                        ; preds = %.lr.ph.preheader
  %n.vec = and i64 %2, -8
  br label %vector.body

vector.body:                                      ; preds = %vector.body, %vector.ph
  %index = phi i64 [ 0, %vector.ph ], [ %index.next, %vector.body ]
  %vec.phi = phi <4 x i32> [ zeroinitializer, %vector.ph ], [ %14, %vector.body ]
  %vec.phi11 = phi <4 x i32> [ zeroinitializer, %vector.ph ], [ %15, %vector.body ]
  %4 = getelementptr inbounds i8, ptr %0, i64 %index
  %5 = getelementptr inbounds i8, ptr %4, i64 4
  %wide.load = load <4 x i8>, ptr %4, align 1, !tbaa !5
  %wide.load12 = load <4 x i8>, ptr %5, align 1, !tbaa !5
  %6 = zext <4 x i8> %wide.load to <4 x i32>
  %7 = zext <4 x i8> %wide.load12 to <4 x i32>
  %8 = getelementptr inbounds i8, ptr %1, i64 %index
  %9 = getelementptr inbounds i8, ptr %8, i64 4
  %wide.load13 = load <4 x i8>, ptr %8, align 1, !tbaa !5
  %wide.load14 = load <4 x i8>, ptr %9, align 1, !tbaa !5
  %10 = zext <4 x i8> %wide.load13 to <4 x i32>
  %11 = zext <4 x i8> %wide.load14 to <4 x i32>
  %12 = mul nuw nsw <4 x i32> %10, %6
  %13 = mul nuw nsw <4 x i32> %11, %7
  %14 = add <4 x i32> %12, %vec.phi
  %15 = add <4 x i32> %13, %vec.phi11
  %index.next = add nuw i64 %index, 8
  %16 = icmp eq i64 %index.next, %n.vec
  br i1 %16, label %middle.block, label %vector.body, !llvm.loop !8

middle.block:                                     ; preds = %vector.body
  %bin.rdx = add <4 x i32> %15, %14
  %17 = tail call i32 @llvm.vector.reduce.add.v4i32(<4 x i32> %bin.rdx)
  %cmp.n = icmp eq i64 %n.vec, %2
  br i1 %cmp.n, label %._crit_edge, label %.lr.ph.preheader15

._crit_edge:                                      ; preds = %.lr.ph, %middle.block, %3
  %.08.lcssa = phi i32 [ 0, %3 ], [ %17, %middle.block ], [ %25, %.lr.ph ]
  ret i32 %.08.lcssa

.lr.ph:                                           ; preds = %.lr.ph.preheader15, %.lr.ph
  %.010 = phi i64 [ %26, %.lr.ph ], [ %.010.ph, %.lr.ph.preheader15 ]
  %.089 = phi i32 [ %25, %.lr.ph ], [ %.089.ph, %.lr.ph.preheader15 ]
  %18 = getelementptr inbounds i8, ptr %0, i64 %.010
  %19 = load i8, ptr %18, align 1, !tbaa !5
  %20 = zext i8 %19 to i32
  %21 = getelementptr inbounds i8, ptr %1, i64 %.010
  %22 = load i8, ptr %21, align 1, !tbaa !5
  %23 = zext i8 %22 to i32
  %24 = mul nuw nsw i32 %23, %20
  %25 = add nuw nsw i32 %24, %.089
  %26 = add nuw i64 %.010, 1
  %exitcond.not = icmp eq i64 %26, %2
  br i1 %exitcond.not, label %._crit_edge, label %.lr.ph, !llvm.loop !12
}

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i32 @llvm.vector.reduce.add.v4i32(<4 x i32>) #1

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: read) 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 speculatable willreturn memory(none) }

!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++ 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, !11, !10}


; Effective O3 passes: CorrelatedValuePropagationPass,GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopLoadEliminationPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,LoopVectorizePass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass