; LLVM IR from kostya/crystal-benchmarks-game :: spectralnorm (spectralnorm)

; 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
declare dso_local double @eval_A(i32 noundef, i32 noundef) #0

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

9:                                                ; preds = %41, %3
  %10 = load i32, ptr %7, align 4, !tbaa !5
  %11 = load i32, ptr %4, align 4, !tbaa !5
  %12 = icmp slt i32 %10, %11
  br i1 %12, label %13, label %44

13:                                               ; preds = %9
  %14 = load ptr, ptr %6, align 8, !tbaa !9
  %15 = load i32, ptr %7, align 4, !tbaa !5
  %16 = sext i32 %15 to i64
  %17 = getelementptr inbounds double, ptr %14, i64 %16
  store double 0.000000e+00, ptr %17, align 8, !tbaa !11
  store i32 0, ptr %8, align 4, !tbaa !5
  br label %18

18:                                               ; preds = %37, %13
  %19 = load i32, ptr %8, align 4, !tbaa !5
  %20 = load i32, ptr %4, align 4, !tbaa !5
  %21 = icmp slt i32 %19, %20
  br i1 %21, label %22, label %40

22:                                               ; preds = %18
  %23 = load i32, ptr %7, align 4, !tbaa !5
  %24 = load i32, ptr %8, align 4, !tbaa !5
  %25 = call double @eval_A(i32 noundef %23, i32 noundef %24)
  %26 = load ptr, ptr %5, align 8, !tbaa !9
  %27 = load i32, ptr %8, align 4, !tbaa !5
  %28 = sext i32 %27 to i64
  %29 = getelementptr inbounds double, ptr %26, i64 %28
  %30 = load double, ptr %29, align 8, !tbaa !11
  %31 = load ptr, ptr %6, align 8, !tbaa !9
  %32 = load i32, ptr %7, align 4, !tbaa !5
  %33 = sext i32 %32 to i64
  %34 = getelementptr inbounds double, ptr %31, i64 %33
  %35 = load double, ptr %34, align 8, !tbaa !11
  %36 = call double @llvm.fmuladd.f64(double %25, double %30, double %35)
  store double %36, ptr %34, align 8, !tbaa !11
  br label %37

37:                                               ; preds = %22
  %38 = load i32, ptr %8, align 4, !tbaa !5
  %39 = add nsw i32 %38, 1
  store i32 %39, ptr %8, align 4, !tbaa !5
  br label %18, !llvm.loop !13

40:                                               ; preds = %18
  br label %41

41:                                               ; preds = %40
  %42 = load i32, ptr %7, align 4, !tbaa !5
  %43 = add nsw i32 %42, 1
  store i32 %43, ptr %7, align 4, !tbaa !5
  br label %9, !llvm.loop !15

44:                                               ; preds = %9
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #3
  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 speculatable willreturn memory(none)
declare double @llvm.fmuladd.f64(double, double, double) #2

; 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 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"double", !7, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}
!15 = distinct !{!15, !14}


; 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: nounwind uwtable
declare dso_local double @eval_A(i32 noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local void @eval_A_times_u(i32 noundef %0, ptr nocapture noundef readonly %1, ptr nocapture noundef %2) local_unnamed_addr #0 {
  %4 = icmp sgt i32 %0, 0
  br i1 %4, label %.lr.ph.us.preheader, label %._crit_edge19

.lr.ph.us.preheader:                              ; preds = %3
  %wide.trip.count24 = zext nneg i32 %0 to i64
  br label %.lr.ph.us

.lr.ph.us:                                        ; preds = %.lr.ph.us.preheader, %._crit_edge.us
  %indvars.iv21 = phi i64 [ 0, %.lr.ph.us.preheader ], [ %indvars.iv.next22, %._crit_edge.us ]
  %5 = getelementptr inbounds double, ptr %2, i64 %indvars.iv21
  store double 0.000000e+00, ptr %5, align 8, !tbaa !5
  %6 = trunc nuw nsw i64 %indvars.iv21 to i32
  br label %7

7:                                                ; preds = %.lr.ph.us, %7
  %indvars.iv = phi i64 [ 0, %.lr.ph.us ], [ %indvars.iv.next, %7 ]
  %8 = trunc nuw nsw i64 %indvars.iv to i32
  %9 = tail call double @eval_A(i32 noundef %6, i32 noundef %8)
  %10 = getelementptr inbounds double, ptr %1, i64 %indvars.iv
  %11 = load double, ptr %10, align 8, !tbaa !5
  %12 = load double, ptr %5, align 8, !tbaa !5
  %13 = tail call double @llvm.fmuladd.f64(double %9, double %11, double %12)
  store double %13, ptr %5, align 8, !tbaa !5
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next, %wide.trip.count24
  br i1 %exitcond.not, label %._crit_edge.us, label %7, !llvm.loop !9

._crit_edge.us:                                   ; preds = %7
  %indvars.iv.next22 = add nuw nsw i64 %indvars.iv21, 1
  %exitcond25.not = icmp eq i64 %indvars.iv.next22, %wide.trip.count24
  br i1 %exitcond25.not, label %._crit_edge19, label %.lr.ph.us, !llvm.loop !11

._crit_edge19:                                    ; preds = %._crit_edge.us, %3
  ret void
}

; Function Attrs: mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare double @llvm.fmuladd.f64(double, double, double) #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 = { mustprogress 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 = !{!"double", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = distinct !{!11, !10}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopRotatePass,LoopSimplifyCFGPass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass