; LLVM IR from jgaeddert/liquid-dsp :: src/matrix/src (matrixc)

; 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: nounwind uwtable
define dso_local i32 @matrixc_sub(ptr noundef %0, ptr noundef %1, ptr noundef %2, i32 noundef %3, i32 noundef %4) #1 {
  %6 = alloca ptr, align 8
  %7 = alloca ptr, align 8
  %8 = alloca ptr, align 8
  %9 = alloca i32, align 4
  %10 = alloca i32, align 4
  %11 = alloca i32, align 4
  store ptr %0, ptr %6, align 8, !tbaa !5
  store ptr %1, ptr %7, align 8, !tbaa !5
  store ptr %2, ptr %8, align 8, !tbaa !5
  store i32 %3, ptr %9, align 4, !tbaa !9
  store i32 %4, ptr %10, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %11) #2
  store i32 0, ptr %11, align 4, !tbaa !9
  br label %12

12:                                               ; preds = %43, %5
  %13 = load i32, ptr %11, align 4, !tbaa !9
  %14 = load i32, ptr %9, align 4, !tbaa !9
  %15 = load i32, ptr %10, align 4, !tbaa !9
  %16 = mul i32 %14, %15
  %17 = icmp ult i32 %13, %16
  br i1 %17, label %18, label %46

18:                                               ; preds = %12
  %19 = load ptr, ptr %6, align 8, !tbaa !5
  %20 = load i32, ptr %11, align 4, !tbaa !9
  %21 = zext i32 %20 to i64
  %22 = getelementptr inbounds { double, double }, ptr %19, i64 %21
  %23 = getelementptr inbounds { double, double }, ptr %22, i32 0, i32 0
  %24 = load double, ptr %23, align 8
  %25 = getelementptr inbounds { double, double }, ptr %22, i32 0, i32 1
  %26 = load double, ptr %25, align 8
  %27 = load ptr, ptr %7, align 8, !tbaa !5
  %28 = load i32, ptr %11, align 4, !tbaa !9
  %29 = zext i32 %28 to i64
  %30 = getelementptr inbounds { double, double }, ptr %27, i64 %29
  %31 = getelementptr inbounds { double, double }, ptr %30, i32 0, i32 0
  %32 = load double, ptr %31, align 8
  %33 = getelementptr inbounds { double, double }, ptr %30, i32 0, i32 1
  %34 = load double, ptr %33, align 8
  %35 = fsub double %24, %32
  %36 = fsub double %26, %34
  %37 = load ptr, ptr %8, align 8, !tbaa !5
  %38 = load i32, ptr %11, align 4, !tbaa !9
  %39 = zext i32 %38 to i64
  %40 = getelementptr inbounds { double, double }, ptr %37, i64 %39
  %41 = getelementptr inbounds { double, double }, ptr %40, i32 0, i32 0
  %42 = getelementptr inbounds { double, double }, ptr %40, i32 0, i32 1
  store double %35, ptr %41, align 8
  store double %36, ptr %42, align 8
  br label %43

43:                                               ; preds = %18
  %44 = load i32, ptr %11, align 4, !tbaa !9
  %45 = add i32 %44, 1
  store i32 %45, ptr %11, align 4, !tbaa !9
  br label %12, !llvm.loop !11

46:                                               ; preds = %12
  call void @llvm.lifetime.end.p0(i64 4, ptr %11) #2
  ret i32 0
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !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: nofree norecurse nosync nounwind memory(argmem: readwrite) uwtable
define dso_local noundef i32 @matrixc_sub(ptr nocapture noundef readonly %0, ptr nocapture noundef readonly %1, ptr nocapture noundef writeonly %2, i32 noundef %3, i32 noundef %4) local_unnamed_addr #0 {
  %6 = mul i32 %4, %3
  %.not = icmp eq i32 %6, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph.preheader

.lr.ph.preheader:                                 ; preds = %5
  %wide.trip.count = zext i32 %6 to i64
  %min.iters.check = icmp ult i32 %6, 8
  br i1 %min.iters.check, label %.lr.ph.preheader20, label %vector.memcheck

vector.memcheck:                                  ; preds = %.lr.ph.preheader
  %7 = shl nuw nsw i64 %wide.trip.count, 4
  %scevgep = getelementptr i8, ptr %2, i64 %7
  %scevgep11 = getelementptr i8, ptr %0, i64 %7
  %scevgep12 = getelementptr i8, ptr %1, i64 %7
  %bound0 = icmp ugt ptr %scevgep11, %2
  %bound1 = icmp ugt ptr %scevgep, %0
  %found.conflict = and i1 %bound0, %bound1
  %bound013 = icmp ugt ptr %scevgep12, %2
  %bound114 = icmp ugt ptr %scevgep, %1
  %found.conflict15 = and i1 %bound013, %bound114
  %conflict.rdx = or i1 %found.conflict, %found.conflict15
  br i1 %conflict.rdx, label %.lr.ph.preheader20, label %vector.ph

vector.ph:                                        ; preds = %vector.memcheck
  %n.vec = and i64 %wide.trip.count, 4294967294
  br label %vector.body

vector.body:                                      ; preds = %vector.body, %vector.ph
  %index = phi i64 [ 0, %vector.ph ], [ %index.next, %vector.body ]
  %8 = getelementptr inbounds { double, double }, ptr %0, i64 %index
  %wide.vec = load <4 x double>, ptr %8, align 8
  %9 = getelementptr inbounds { double, double }, ptr %1, i64 %index
  %wide.vec17 = load <4 x double>, ptr %9, align 8
  %10 = getelementptr inbounds { double, double }, ptr %2, i64 %index
  %interleaved.vec = fsub <4 x double> %wide.vec, %wide.vec17
  store <4 x double> %interleaved.vec, ptr %10, align 8
  %index.next = add nuw i64 %index, 2
  %11 = icmp eq i64 %index.next, %n.vec
  br i1 %11, label %middle.block, label %vector.body, !llvm.loop !5

middle.block:                                     ; preds = %vector.body
  %cmp.n = icmp eq i64 %n.vec, %wide.trip.count
  br i1 %cmp.n, label %._crit_edge, label %.lr.ph.preheader20

.lr.ph.preheader20:                               ; preds = %middle.block, %vector.memcheck, %.lr.ph.preheader
  %indvars.iv.ph = phi i64 [ 0, %vector.memcheck ], [ 0, %.lr.ph.preheader ], [ %n.vec, %middle.block ]
  %xtraiter = and i64 %wide.trip.count, 1
  %lcmp.mod.not = icmp eq i64 %xtraiter, 0
  br i1 %lcmp.mod.not, label %.lr.ph.prol.loopexit, label %.lr.ph.prol

.lr.ph.prol:                                      ; preds = %.lr.ph.preheader20
  %12 = getelementptr inbounds { double, double }, ptr %0, i64 %indvars.iv.ph
  %13 = getelementptr inbounds { double, double }, ptr %1, i64 %indvars.iv.ph
  %14 = getelementptr inbounds { double, double }, ptr %2, i64 %indvars.iv.ph
  %15 = load <2 x double>, ptr %12, align 8
  %16 = load <2 x double>, ptr %13, align 8
  %17 = fsub <2 x double> %15, %16
  store <2 x double> %17, ptr %14, align 8
  %indvars.iv.next.prol = or disjoint i64 %indvars.iv.ph, 1
  br label %.lr.ph.prol.loopexit

.lr.ph.prol.loopexit:                             ; preds = %.lr.ph.prol, %.lr.ph.preheader20
  %indvars.iv.unr = phi i64 [ %indvars.iv.ph, %.lr.ph.preheader20 ], [ %indvars.iv.next.prol, %.lr.ph.prol ]
  %18 = add nsw i64 %wide.trip.count, -1
  %19 = icmp eq i64 %indvars.iv.ph, %18
  br i1 %19, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.prol.loopexit, %.lr.ph
  %indvars.iv = phi i64 [ %indvars.iv.next.1, %.lr.ph ], [ %indvars.iv.unr, %.lr.ph.prol.loopexit ]
  %20 = getelementptr inbounds { double, double }, ptr %0, i64 %indvars.iv
  %21 = getelementptr inbounds { double, double }, ptr %1, i64 %indvars.iv
  %22 = getelementptr inbounds { double, double }, ptr %2, i64 %indvars.iv
  %23 = load <2 x double>, ptr %20, align 8
  %24 = load <2 x double>, ptr %21, align 8
  %25 = fsub <2 x double> %23, %24
  store <2 x double> %25, ptr %22, align 8
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %26 = getelementptr inbounds { double, double }, ptr %0, i64 %indvars.iv.next
  %27 = getelementptr inbounds { double, double }, ptr %1, i64 %indvars.iv.next
  %28 = getelementptr inbounds { double, double }, ptr %2, i64 %indvars.iv.next
  %29 = load <2 x double>, ptr %26, align 8
  %30 = load <2 x double>, ptr %27, align 8
  %31 = fsub <2 x double> %29, %30
  store <2 x double> %31, ptr %28, align 8
  %indvars.iv.next.1 = add nuw nsw i64 %indvars.iv, 2
  %exitcond.not.1 = icmp eq i64 %indvars.iv.next.1, %wide.trip.count
  br i1 %exitcond.not.1, label %._crit_edge, label %.lr.ph, !llvm.loop !9

._crit_edge:                                      ; preds = %.lr.ph.prol.loopexit, %.lr.ph, %middle.block, %5
  ret i32 0
}

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 = distinct !{!5, !6, !7, !8}
!6 = !{!"llvm.loop.mustprogress"}
!7 = !{!"llvm.loop.isvectorized", i32 1}
!8 = !{!"llvm.loop.unroll.runtime.disable"}
!9 = distinct !{!9, !6, !7}


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