; LLVM IR from CLASS-SZ/class_sz :: class-sz/tools (arrays)

; 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: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare double @llvm.fmuladd.f64(double, double, double) #1

; Function Attrs: nounwind uwtable
define dso_local i32 @array_trapezoidal_convolution(ptr noalias noundef %0, ptr noalias noundef %1, i32 noundef %2, ptr noalias noundef %3, ptr noalias noundef %4, ptr noundef %5) #2 {
  %7 = alloca ptr, align 8
  %8 = alloca ptr, align 8
  %9 = alloca i32, align 4
  %10 = alloca ptr, align 8
  %11 = alloca ptr, align 8
  %12 = alloca ptr, align 8
  %13 = alloca i32, align 4
  %14 = alloca double, align 8
  store ptr %0, ptr %7, align 8, !tbaa !5
  store ptr %1, ptr %8, align 8, !tbaa !5
  store i32 %2, ptr %9, align 4, !tbaa !9
  store ptr %3, ptr %10, align 8, !tbaa !5
  store ptr %4, ptr %11, align 8, !tbaa !5
  store ptr %5, ptr %12, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %13) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %14) #3
  store double 0.000000e+00, ptr %14, align 8, !tbaa !11
  store i32 0, ptr %13, align 4, !tbaa !9
  br label %15

15:                                               ; preds = %38, %6
  %16 = load i32, ptr %13, align 4, !tbaa !9
  %17 = load i32, ptr %9, align 4, !tbaa !9
  %18 = icmp slt i32 %16, %17
  br i1 %18, label %19, label %41

19:                                               ; preds = %15
  %20 = load ptr, ptr %7, align 8, !tbaa !5
  %21 = load i32, ptr %13, align 4, !tbaa !9
  %22 = sext i32 %21 to i64
  %23 = getelementptr inbounds double, ptr %20, i64 %22
  %24 = load double, ptr %23, align 8, !tbaa !11
  %25 = load ptr, ptr %8, align 8, !tbaa !5
  %26 = load i32, ptr %13, align 4, !tbaa !9
  %27 = sext i32 %26 to i64
  %28 = getelementptr inbounds double, ptr %25, i64 %27
  %29 = load double, ptr %28, align 8, !tbaa !11
  %30 = fmul double %24, %29
  %31 = load ptr, ptr %10, align 8, !tbaa !5
  %32 = load i32, ptr %13, align 4, !tbaa !9
  %33 = sext i32 %32 to i64
  %34 = getelementptr inbounds double, ptr %31, i64 %33
  %35 = load double, ptr %34, align 8, !tbaa !11
  %36 = load double, ptr %14, align 8, !tbaa !11
  %37 = call double @llvm.fmuladd.f64(double %30, double %35, double %36)
  store double %37, ptr %14, align 8, !tbaa !11
  br label %38

38:                                               ; preds = %19
  %39 = load i32, ptr %13, align 4, !tbaa !9
  %40 = add nsw i32 %39, 1
  store i32 %40, ptr %13, align 4, !tbaa !9
  br label %15, !llvm.loop !13

41:                                               ; preds = %15
  %42 = load double, ptr %14, align 8, !tbaa !11
  %43 = load ptr, ptr %11, align 8, !tbaa !5
  store double %42, ptr %43, align 8, !tbaa !11
  call void @llvm.lifetime.end.p0(i64 8, ptr %14) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %13) #3
  ret i32 0
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #2 = { 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 = !{!"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 = !{!"double", !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: mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare double @llvm.fmuladd.f64(double, double, double) #0

; Function Attrs: nofree norecurse nosync nounwind memory(argmem: readwrite) uwtable
define dso_local noundef i32 @array_trapezoidal_convolution(ptr noalias nocapture noundef readonly %0, ptr noalias nocapture noundef readonly %1, i32 noundef %2, ptr noalias nocapture noundef readonly %3, ptr noalias nocapture noundef writeonly %4, ptr nocapture noundef readnone %5) local_unnamed_addr #1 {
  %7 = icmp sgt i32 %2, 0
  br i1 %7, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %6
  %wide.trip.count = zext nneg i32 %2 to i64
  %xtraiter = and i64 %wide.trip.count, 1
  %8 = icmp eq i32 %2, 1
  br i1 %8, label %._crit_edge.loopexit.unr-lcssa, label %.lr.ph.preheader.new

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

.lr.ph:                                           ; preds = %.lr.ph, %.lr.ph.preheader.new
  %indvars.iv = phi i64 [ 0, %.lr.ph.preheader.new ], [ %indvars.iv.next.1, %.lr.ph ]
  %.013 = phi double [ 0.000000e+00, %.lr.ph.preheader.new ], [ %24, %.lr.ph ]
  %niter = phi i64 [ 0, %.lr.ph.preheader.new ], [ %niter.next.1, %.lr.ph ]
  %9 = getelementptr inbounds double, ptr %0, i64 %indvars.iv
  %10 = load double, ptr %9, align 8, !tbaa !5
  %11 = getelementptr inbounds double, ptr %1, i64 %indvars.iv
  %12 = load double, ptr %11, align 8, !tbaa !5
  %13 = fmul double %10, %12
  %14 = getelementptr inbounds double, ptr %3, i64 %indvars.iv
  %15 = load double, ptr %14, align 8, !tbaa !5
  %16 = tail call double @llvm.fmuladd.f64(double %13, double %15, double %.013)
  %indvars.iv.next = or disjoint i64 %indvars.iv, 1
  %17 = getelementptr inbounds double, ptr %0, i64 %indvars.iv.next
  %18 = load double, ptr %17, align 8, !tbaa !5
  %19 = getelementptr inbounds double, ptr %1, i64 %indvars.iv.next
  %20 = load double, ptr %19, align 8, !tbaa !5
  %21 = fmul double %18, %20
  %22 = getelementptr inbounds double, ptr %3, i64 %indvars.iv.next
  %23 = load double, ptr %22, align 8, !tbaa !5
  %24 = tail call double @llvm.fmuladd.f64(double %21, double %23, double %16)
  %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, label %.lr.ph, !llvm.loop !9

._crit_edge.loopexit.unr-lcssa:                   ; preds = %.lr.ph, %.lr.ph.preheader
  %.lcssa.ph = phi double [ poison, %.lr.ph.preheader ], [ %24, %.lr.ph ]
  %indvars.iv.unr = phi i64 [ 0, %.lr.ph.preheader ], [ %indvars.iv.next.1, %.lr.ph ]
  %.013.unr = phi double [ 0.000000e+00, %.lr.ph.preheader ], [ %24, %.lr.ph ]
  %lcmp.mod.not = icmp eq i64 %xtraiter, 0
  br i1 %lcmp.mod.not, label %._crit_edge, label %.lr.ph.epil

.lr.ph.epil:                                      ; preds = %._crit_edge.loopexit.unr-lcssa
  %25 = getelementptr inbounds double, ptr %0, i64 %indvars.iv.unr
  %26 = load double, ptr %25, align 8, !tbaa !5
  %27 = getelementptr inbounds double, ptr %1, i64 %indvars.iv.unr
  %28 = load double, ptr %27, align 8, !tbaa !5
  %29 = fmul double %26, %28
  %30 = getelementptr inbounds double, ptr %3, i64 %indvars.iv.unr
  %31 = load double, ptr %30, align 8, !tbaa !5
  %32 = tail call double @llvm.fmuladd.f64(double %29, double %31, double %.013.unr)
  br label %._crit_edge

._crit_edge:                                      ; preds = %.lr.ph.epil, %._crit_edge.loopexit.unr-lcssa, %6
  %.0.lcssa = phi double [ 0.000000e+00, %6 ], [ %.lcssa.ph, %._crit_edge.loopexit.unr-lcssa ], [ %32, %.lr.ph.epil ]
  store double %.0.lcssa, ptr %4, align 8, !tbaa !5
  ret i32 0
}

attributes #0 = { mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #1 = { 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 = !{!"double", !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,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass