; LLVM IR from rflynn/imgmin :: src (dssim)

; 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.dssim_info = type { [3 x %struct.dssim_info_chan], i32 }
%struct.dssim_info_chan = type { i32, i32, ptr, ptr, ptr, ptr, ptr, ptr }

; Function Attrs: nounwind uwtable
define dso_local ptr @dssim_init(i32 noundef %0) #0 {
  %2 = alloca ptr, align 8
  %3 = alloca i32, align 4
  %4 = alloca ptr, align 8
  store i32 %0, ptr %3, align 4, !tbaa !5
  %5 = load i32, ptr %3, align 4, !tbaa !5
  %6 = icmp ne i32 %5, 1
  br i1 %6, label %7, label %11

7:                                                ; preds = %1
  %8 = load i32, ptr %3, align 4, !tbaa !5
  %9 = icmp ne i32 %8, 3
  br i1 %9, label %10, label %11

10:                                               ; preds = %7
  store ptr null, ptr %2, align 8
  br label %21

11:                                               ; preds = %7, %1
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #3
  %12 = call noalias ptr @calloc(i64 noundef 1, i64 noundef 176) #4
  store ptr %12, ptr %4, align 8, !tbaa !9
  %13 = load ptr, ptr %4, align 8, !tbaa !9
  %14 = icmp ne ptr %13, null
  br i1 %14, label %15, label %19

15:                                               ; preds = %11
  %16 = load i32, ptr %3, align 4, !tbaa !5
  %17 = load ptr, ptr %4, align 8, !tbaa !9
  %18 = getelementptr inbounds %struct.dssim_info, ptr %17, i32 0, i32 1
  store i32 %16, ptr %18, align 8, !tbaa !11
  br label %19

19:                                               ; preds = %15, %11
  %20 = load ptr, ptr %4, align 8, !tbaa !9
  store ptr %20, ptr %2, align 8
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #3
  br label %21

21:                                               ; preds = %19, %10
  %22 = load ptr, ptr %2, align 8
  ret ptr %22
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nounwind allocsize(0,1)
declare noalias ptr @calloc(i64 noundef, i64 noundef) #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 = { nounwind allocsize(0,1) "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 = { nounwind allocsize(0,1) }

!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, !6, i64 168}
!12 = !{!"dssim_info", !7, i64 0, !6, i64 168}


; 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 nofree nounwind willreturn memory(write, argmem: none, inaccessiblemem: readwrite) uwtable
define dso_local noalias noundef ptr @dssim_init(i32 noundef %0) local_unnamed_addr #0 {
  %2 = and i32 %0, -3
  %or.cond.not = icmp eq i32 %2, 1
  br i1 %or.cond.not, label %3, label %7

3:                                                ; preds = %1
  %4 = tail call noalias dereferenceable_or_null(176) ptr @calloc(i64 noundef 1, i64 noundef 176) #2
  %.not = icmp eq ptr %4, null
  br i1 %.not, label %7, label %5

5:                                                ; preds = %3
  %6 = getelementptr inbounds i8, ptr %4, i64 168
  store i32 %0, ptr %6, align 8, !tbaa !5
  br label %7

7:                                                ; preds = %3, %5, %1
  %.0 = phi ptr [ null, %1 ], [ %4, %5 ], [ null, %3 ]
  ret ptr %.0
}

; Function Attrs: mustprogress nofree nounwind willreturn allockind("alloc,zeroed") allocsize(0,1) memory(inaccessiblemem: readwrite)
declare noalias noundef ptr @calloc(i64 noundef, i64 noundef) local_unnamed_addr #1

attributes #0 = { mustprogress nofree nounwind willreturn memory(write, argmem: none, inaccessiblemem: 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" }
attributes #1 = { mustprogress nofree nounwind willreturn allockind("alloc,zeroed") allocsize(0,1) memory(inaccessiblemem: readwrite) "alloc-family"="malloc" "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 allocsize(0,1) }

!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, !9, i64 168}
!6 = !{!"dssim_info", !7, i64 0, !9, i64 168}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!"int", !7, i64 0}


; Effective O3 passes: CorrelatedValuePropagationPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass