; LLVM IR from harharkh/sb_desc :: src (matrix)

; 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"

%struct.sb_mat = type { i64, i64, i64, ptr }

@sb_error_log = external global ptr, align 8
@stderr = external global ptr, align 8
@.str.1 = external hidden unnamed_addr constant [2 x i8], align 1
@.str.197 = external hidden unnamed_addr constant [33 x i8], align 1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nounwind
declare i32 @fprintf(ptr noundef, ptr noundef, ...) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: noreturn nounwind
declare void @abort() #2

; Function Attrs: nounwind uwtable
define dso_local i32 @sb_mat_is_zero(ptr noundef %0) #3 {
  %2 = alloca i32, align 4
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca i64, align 8
  %6 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  br label %7

7:                                                ; preds = %1
  %8 = load ptr, ptr %3, align 8, !tbaa !5
  %9 = icmp ne ptr %8, null
  br i1 %9, label %29, label %10

10:                                               ; preds = %7
  %11 = load ptr, ptr @sb_error_log, align 8, !tbaa !5
  %12 = icmp ne ptr %11, null
  br i1 %12, label %13, label %15

13:                                               ; preds = %10
  %14 = load ptr, ptr @sb_error_log, align 8, !tbaa !5
  br label %17

15:                                               ; preds = %10
  %16 = load ptr, ptr @stderr, align 8, !tbaa !5
  br label %17

17:                                               ; preds = %15, %13
  %18 = phi ptr [ %14, %13 ], [ %16, %15 ]
  %19 = call i32 (ptr, ptr, ...) @fprintf(ptr noundef %18, ptr noundef @.str.197) #4
  %20 = load ptr, ptr @sb_error_log, align 8, !tbaa !5
  %21 = icmp ne ptr %20, null
  br i1 %21, label %22, label %24

22:                                               ; preds = %17
  %23 = load ptr, ptr @sb_error_log, align 8, !tbaa !5
  br label %26

24:                                               ; preds = %17
  %25 = load ptr, ptr @stderr, align 8, !tbaa !5
  br label %26

26:                                               ; preds = %24, %22
  %27 = phi ptr [ %23, %22 ], [ %25, %24 ]
  %28 = call i32 (ptr, ptr, ...) @fprintf(ptr noundef %27, ptr noundef @.str.1) #4
  call void @abort() #5
  unreachable

29:                                               ; preds = %7
  br label %30

30:                                               ; preds = %29
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #4
  %31 = load ptr, ptr %3, align 8, !tbaa !5
  %32 = getelementptr inbounds %struct.sb_mat, ptr %31, i32 0, i32 3
  %33 = load ptr, ptr %32, align 8, !tbaa !9
  store ptr %33, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #4
  store i64 0, ptr %5, align 8, !tbaa !12
  br label %34

34:                                               ; preds = %49, %30
  %35 = load i64, ptr %5, align 8, !tbaa !12
  %36 = load ptr, ptr %3, align 8, !tbaa !5
  %37 = getelementptr inbounds %struct.sb_mat, ptr %36, i32 0, i32 2
  %38 = load i64, ptr %37, align 8, !tbaa !13
  %39 = icmp ult i64 %35, %38
  br i1 %39, label %41, label %40

40:                                               ; preds = %34
  store i32 4, ptr %6, align 4
  br label %52

41:                                               ; preds = %34
  %42 = load ptr, ptr %4, align 8, !tbaa !5
  %43 = load i64, ptr %5, align 8, !tbaa !12
  %44 = getelementptr inbounds double, ptr %42, i64 %43
  %45 = load double, ptr %44, align 8, !tbaa !14
  %46 = fcmp une double %45, 0.000000e+00
  br i1 %46, label %47, label %48

47:                                               ; preds = %41
  store i32 0, ptr %2, align 4
  store i32 1, ptr %6, align 4
  br label %52

48:                                               ; preds = %41
  br label %49

49:                                               ; preds = %48
  %50 = load i64, ptr %5, align 8, !tbaa !12
  %51 = add i64 %50, 1
  store i64 %51, ptr %5, align 8, !tbaa !12
  br label %34, !llvm.loop !16

52:                                               ; preds = %47, %40
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #4
  %53 = load i32, ptr %6, align 4
  switch i32 %53, label %55 [
    i32 4, label %54
  ]

54:                                               ; preds = %52
  store i32 1, ptr %2, align 4
  store i32 1, ptr %6, align 4
  br label %55

55:                                               ; preds = %54, %52
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #4
  %56 = load i32, ptr %2, align 4
  ret i32 %56
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nounwind "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 = { noreturn nounwind "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 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 #4 = { nounwind }
attributes #5 = { noreturn 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, !6, i64 24}
!10 = !{!"", !11, i64 0, !11, i64 8, !11, i64 16, !6, i64 24}
!11 = !{!"long", !7, i64 0}
!12 = !{!11, !11, i64 0}
!13 = !{!10, !11, i64 16}
!14 = !{!15, !15, i64 0}
!15 = !{!"double", !7, i64 0}
!16 = distinct !{!16, !17}
!17 = !{!"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"

@sb_error_log = external local_unnamed_addr global ptr, align 8
@stderr = external local_unnamed_addr global ptr, align 8
@.str.1 = external hidden unnamed_addr constant [2 x i8], align 1
@.str.197 = external hidden unnamed_addr constant [33 x i8], align 1

; Function Attrs: nofree nounwind
declare noundef i32 @fprintf(ptr nocapture noundef, ptr nocapture noundef readonly, ...) local_unnamed_addr #0

; Function Attrs: noreturn nounwind
declare void @abort() local_unnamed_addr #1

; Function Attrs: nounwind uwtable
define dso_local range(i32 0, 2) i32 @sb_mat_is_zero(ptr noundef readonly %0) local_unnamed_addr #2 {
  %.not = icmp eq ptr %0, null
  br i1 %.not, label %2, label %11

2:                                                ; preds = %1
  %3 = load ptr, ptr @sb_error_log, align 8
  %.not11 = icmp eq ptr %3, null
  %4 = load ptr, ptr @stderr, align 8
  %5 = select i1 %.not11, ptr %4, ptr %3
  %6 = tail call i32 (ptr, ptr, ...) @fprintf(ptr noundef %5, ptr noundef nonnull @.str.197) #3
  %7 = load ptr, ptr @sb_error_log, align 8
  %.not12 = icmp eq ptr %7, null
  %8 = load ptr, ptr @stderr, align 8
  %9 = select i1 %.not12, ptr %8, ptr %7
  %10 = tail call i32 (ptr, ptr, ...) @fprintf(ptr noundef %9, ptr noundef nonnull @.str.1) #3
  tail call void @abort() #4
  unreachable

11:                                               ; preds = %1
  %12 = getelementptr inbounds i8, ptr %0, i64 24
  %13 = load ptr, ptr %12, align 8, !tbaa !5
  %14 = getelementptr inbounds i8, ptr %0, i64 16
  %15 = load i64, ptr %14, align 8, !tbaa !11
  %.not1314 = icmp eq i64 %15, 0
  br i1 %.not1314, label %._crit_edge, label %.lr.ph.preheader

.lr.ph.preheader:                                 ; preds = %11
  %16 = load double, ptr %13, align 8, !tbaa !12
  %17 = fcmp une double %16, 0.000000e+00
  br i1 %17, label %._crit_edge, label %.lr.ph20

.lr.ph20:                                         ; preds = %.lr.ph.preheader, %.lr.ph
  %.081519 = phi i64 [ %18, %.lr.ph ], [ 0, %.lr.ph.preheader ]
  %18 = add nuw i64 %.081519, 1
  %exitcond = icmp eq i64 %18, %15
  br i1 %exitcond, label %._crit_edge.loopexit.loopexit, label %.lr.ph, !llvm.loop !14

.lr.ph:                                           ; preds = %.lr.ph20
  %19 = getelementptr inbounds double, ptr %13, i64 %18
  %20 = load double, ptr %19, align 8, !tbaa !12
  %21 = fcmp une double %20, 0.000000e+00
  br i1 %21, label %._crit_edge.loopexit.loopexit, label %.lr.ph20, !llvm.loop !14

._crit_edge.loopexit.loopexit:                    ; preds = %.lr.ph, %.lr.ph20
  %.not13.le = icmp uge i64 %18, %15
  %22 = zext i1 %.not13.le to i32
  br label %._crit_edge

._crit_edge:                                      ; preds = %.lr.ph.preheader, %._crit_edge.loopexit.loopexit, %11
  %.not13.lcssa = phi i32 [ 1, %11 ], [ 0, %.lr.ph.preheader ], [ %22, %._crit_edge.loopexit.loopexit ]
  ret i32 %.not13.lcssa
}

attributes #0 = { nofree nounwind "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 = { noreturn nounwind "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 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 }
attributes #4 = { noreturn 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, !10, i64 24}
!6 = !{!"", !7, i64 0, !7, i64 8, !7, i64 16, !10, i64 24}
!7 = !{!"long", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"any pointer", !8, i64 0}
!11 = !{!6, !7, i64 16}
!12 = !{!13, !13, i64 0}
!13 = !{!"double", !8, i64 0}
!14 = distinct !{!14, !15}
!15 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,LCSSAPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass