; LLVM IR from glaretechnologies/substrata :: opus/opus-1.3.1/silk/float (regularize_correlations_FLP)

; 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 void @silk_regularize_correlations_FLP(ptr noundef %0, ptr noundef %1, float noundef %2, i32 noundef %3) #0 {
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca float, align 4
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  store ptr %0, ptr %5, align 8, !tbaa !5
  store ptr %1, ptr %6, align 8, !tbaa !5
  store float %2, ptr %7, align 4, !tbaa !9
  store i32 %3, ptr %8, align 4, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #2
  store i32 0, ptr %9, align 4, !tbaa !11
  br label %10

10:                                               ; preds = %27, %4
  %11 = load i32, ptr %9, align 4, !tbaa !11
  %12 = load i32, ptr %8, align 4, !tbaa !11
  %13 = icmp slt i32 %11, %12
  br i1 %13, label %14, label %30

14:                                               ; preds = %10
  %15 = load float, ptr %7, align 4, !tbaa !9
  %16 = load ptr, ptr %5, align 8, !tbaa !5
  %17 = getelementptr inbounds float, ptr %16, i64 0
  %18 = load i32, ptr %9, align 4, !tbaa !11
  %19 = load i32, ptr %8, align 4, !tbaa !11
  %20 = mul nsw i32 %18, %19
  %21 = load i32, ptr %9, align 4, !tbaa !11
  %22 = add nsw i32 %20, %21
  %23 = sext i32 %22 to i64
  %24 = getelementptr inbounds float, ptr %17, i64 %23
  %25 = load float, ptr %24, align 4, !tbaa !9
  %26 = fadd float %25, %15
  store float %26, ptr %24, align 4, !tbaa !9
  br label %27

27:                                               ; preds = %14
  %28 = load i32, ptr %9, align 4, !tbaa !11
  %29 = add nsw i32 %28, 1
  store i32 %29, ptr %9, align 4, !tbaa !11
  br label %10, !llvm.loop !13

30:                                               ; preds = %10
  %31 = load float, ptr %7, align 4, !tbaa !9
  %32 = load ptr, ptr %6, align 8, !tbaa !5
  %33 = getelementptr inbounds float, ptr %32, i64 0
  %34 = load float, ptr %33, align 4, !tbaa !9
  %35 = fadd float %34, %31
  store float %35, ptr %33, align 4, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #2
  ret void
}

; 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 = !{!"float", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"int", !7, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"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: readwrite) uwtable
define dso_local void @silk_regularize_correlations_FLP(ptr nocapture noundef %0, ptr nocapture noundef %1, float noundef %2, i32 noundef %3) local_unnamed_addr #0 {
  %5 = icmp sgt i32 %3, 0
  br i1 %5, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %4
  %.010 = add nuw i32 %3, 1
  %wide.trip.count = zext nneg i32 %3 to i64
  %xtraiter = and i64 %wide.trip.count, 1
  %6 = icmp eq i32 %3, 1
  br i1 %6, label %._crit_edge.loopexit.unr-lcssa, label %.lr.ph.new

.lr.ph.new:                                       ; preds = %.lr.ph
  %unroll_iter = and i64 %wide.trip.count, 2147483646
  br label %7

7:                                                ; preds = %7, %.lr.ph.new
  %indvars.iv = phi i64 [ 0, %.lr.ph.new ], [ %indvars.iv.next.1, %7 ]
  %niter = phi i64 [ 0, %.lr.ph.new ], [ %niter.next.1, %7 ]
  %8 = trunc nuw nsw i64 %indvars.iv to i32
  %9 = mul i32 %.010, %8
  %10 = sext i32 %9 to i64
  %11 = getelementptr inbounds float, ptr %0, i64 %10
  %12 = load float, ptr %11, align 4, !tbaa !5
  %13 = fadd float %12, %2
  store float %13, ptr %11, align 4, !tbaa !5
  %14 = trunc i64 %indvars.iv to i32
  %15 = or disjoint i32 %14, 1
  %16 = mul i32 %.010, %15
  %17 = sext i32 %16 to i64
  %18 = getelementptr inbounds float, ptr %0, i64 %17
  %19 = load float, ptr %18, align 4, !tbaa !5
  %20 = fadd float %19, %2
  store float %20, ptr %18, align 4, !tbaa !5
  %indvars.iv.next.1 = add nuw nsw i64 %indvars.iv, 2
  %niter.next.1 = add i64 %niter, 2
  %niter.ncmp.1 = icmp eq i64 %niter.next.1, %unroll_iter
  br i1 %niter.ncmp.1, label %._crit_edge.loopexit.unr-lcssa.loopexit, label %7, !llvm.loop !9

._crit_edge.loopexit.unr-lcssa.loopexit:          ; preds = %7
  %21 = trunc nuw nsw i64 %indvars.iv.next.1 to i32
  br label %._crit_edge.loopexit.unr-lcssa

._crit_edge.loopexit.unr-lcssa:                   ; preds = %._crit_edge.loopexit.unr-lcssa.loopexit, %.lr.ph
  %indvars.iv.unr = phi i32 [ 0, %.lr.ph ], [ %21, %._crit_edge.loopexit.unr-lcssa.loopexit ]
  %lcmp.mod.not = icmp eq i64 %xtraiter, 0
  br i1 %lcmp.mod.not, label %._crit_edge, label %._crit_edge.loopexit.epilog-lcssa

._crit_edge.loopexit.epilog-lcssa:                ; preds = %._crit_edge.loopexit.unr-lcssa
  %22 = mul i32 %.010, %indvars.iv.unr
  %23 = sext i32 %22 to i64
  %24 = getelementptr inbounds float, ptr %0, i64 %23
  %25 = load float, ptr %24, align 4, !tbaa !5
  %26 = fadd float %25, %2
  store float %26, ptr %24, align 4, !tbaa !5
  br label %._crit_edge

._crit_edge:                                      ; preds = %._crit_edge.loopexit.epilog-lcssa, %._crit_edge.loopexit.unr-lcssa, %4
  %27 = load float, ptr %1, align 4, !tbaa !5
  %28 = fadd float %27, %2
  store float %28, ptr %1, align 4, !tbaa !5
  ret void
}

attributes #0 = { 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 = !{!"float", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


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