; LLVM IR from NOAA-PMEL/Ferret :: fer/ef_utility (ef_get_mr_list)

; 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"

@GLOBAL_mr_list_ptr = external global ptr, align 8

; Function Attrs: nounwind uwtable
define dso_local void @ef_get_mr_list_(ptr noundef %0) #0 {
  %2 = alloca ptr, align 8
  %3 = alloca i32, align 4
  store ptr %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #2
  %4 = load ptr, ptr @GLOBAL_mr_list_ptr, align 8, !tbaa !5
  %5 = icmp ne ptr %4, null
  br i1 %5, label %6, label %24

6:                                                ; preds = %1
  store i32 0, ptr %3, align 4, !tbaa !9
  br label %7

7:                                                ; preds = %20, %6
  %8 = load i32, ptr %3, align 4, !tbaa !9
  %9 = icmp slt i32 %8, 9
  br i1 %9, label %10, label %23

10:                                               ; preds = %7
  %11 = load ptr, ptr @GLOBAL_mr_list_ptr, align 8, !tbaa !5
  %12 = load i32, ptr %3, align 4, !tbaa !9
  %13 = sext i32 %12 to i64
  %14 = getelementptr inbounds i32, ptr %11, i64 %13
  %15 = load i32, ptr %14, align 4, !tbaa !9
  %16 = load ptr, ptr %2, align 8, !tbaa !5
  %17 = load i32, ptr %3, align 4, !tbaa !9
  %18 = sext i32 %17 to i64
  %19 = getelementptr inbounds i32, ptr %16, i64 %18
  store i32 %15, ptr %19, align 4, !tbaa !9
  br label %20

20:                                               ; preds = %10
  %21 = load i32, ptr %3, align 4, !tbaa !9
  %22 = add nsw i32 %21, 1
  store i32 %22, ptr %3, align 4, !tbaa !9
  br label %7, !llvm.loop !11

23:                                               ; preds = %7
  br label %37

24:                                               ; preds = %1
  store i32 0, ptr %3, align 4, !tbaa !9
  br label %25

25:                                               ; preds = %33, %24
  %26 = load i32, ptr %3, align 4, !tbaa !9
  %27 = icmp slt i32 %26, 9
  br i1 %27, label %28, label %36

28:                                               ; preds = %25
  %29 = load ptr, ptr %2, align 8, !tbaa !5
  %30 = load i32, ptr %3, align 4, !tbaa !9
  %31 = sext i32 %30 to i64
  %32 = getelementptr inbounds i32, ptr %29, i64 %31
  store i32 0, ptr %32, align 4, !tbaa !9
  br label %33

33:                                               ; preds = %28
  %34 = load i32, ptr %3, align 4, !tbaa !9
  %35 = add nsw i32 %34, 1
  store i32 %35, ptr %3, align 4, !tbaa !9
  br label %25, !llvm.loop !13

36:                                               ; preds = %25
  br label %37

37:                                               ; preds = %36, %23
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #2
  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 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 }

!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"}
!13 = distinct !{!13, !12}


; 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"

@GLOBAL_mr_list_ptr = external local_unnamed_addr global ptr, align 8

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(read, argmem: readwrite, inaccessiblemem: none) uwtable
define dso_local void @ef_get_mr_list_(ptr nocapture noundef writeonly %0) local_unnamed_addr #0 {
  %2 = load ptr, ptr @GLOBAL_mr_list_ptr, align 8, !tbaa !5
  %.not = icmp eq ptr %2, null
  br i1 %.not, label %.preheader.preheader, label %.preheader8.preheader

.preheader8.preheader:                            ; preds = %1
  %3 = load i32, ptr %2, align 4, !tbaa !9
  store i32 %3, ptr %0, align 4, !tbaa !9
  %4 = getelementptr inbounds i8, ptr %2, i64 4
  %5 = load i32, ptr %4, align 4, !tbaa !9
  %6 = getelementptr inbounds i8, ptr %0, i64 4
  store i32 %5, ptr %6, align 4, !tbaa !9
  %7 = getelementptr inbounds i8, ptr %2, i64 8
  %8 = load i32, ptr %7, align 4, !tbaa !9
  %9 = getelementptr inbounds i8, ptr %0, i64 8
  store i32 %8, ptr %9, align 4, !tbaa !9
  %10 = getelementptr inbounds i8, ptr %2, i64 12
  %11 = load i32, ptr %10, align 4, !tbaa !9
  %12 = getelementptr inbounds i8, ptr %0, i64 12
  store i32 %11, ptr %12, align 4, !tbaa !9
  %13 = getelementptr inbounds i8, ptr %2, i64 16
  %14 = load i32, ptr %13, align 4, !tbaa !9
  %15 = getelementptr inbounds i8, ptr %0, i64 16
  store i32 %14, ptr %15, align 4, !tbaa !9
  %16 = getelementptr inbounds i8, ptr %2, i64 20
  %17 = load i32, ptr %16, align 4, !tbaa !9
  %18 = getelementptr inbounds i8, ptr %0, i64 20
  store i32 %17, ptr %18, align 4, !tbaa !9
  %19 = getelementptr inbounds i8, ptr %2, i64 24
  %20 = load i32, ptr %19, align 4, !tbaa !9
  %21 = getelementptr inbounds i8, ptr %0, i64 24
  store i32 %20, ptr %21, align 4, !tbaa !9
  %22 = getelementptr inbounds i8, ptr %2, i64 28
  %23 = load i32, ptr %22, align 4, !tbaa !9
  %24 = getelementptr inbounds i8, ptr %0, i64 28
  store i32 %23, ptr %24, align 4, !tbaa !9
  %25 = getelementptr inbounds i8, ptr %2, i64 32
  %26 = load i32, ptr %25, align 4, !tbaa !9
  %27 = getelementptr inbounds i8, ptr %0, i64 32
  store i32 %26, ptr %27, align 4, !tbaa !9
  br label %.loopexit

.preheader.preheader:                             ; preds = %1
  tail call void @llvm.memset.p0.i64(ptr noundef nonnull align 4 dereferenceable(36) %0, i8 0, i64 36, i1 false), !tbaa !9
  br label %.loopexit

.loopexit:                                        ; preds = %.preheader8.preheader, %.preheader.preheader
  ret void
}

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #1

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(read, argmem: readwrite, inaccessiblemem: none) 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 nounwind willreturn memory(argmem: write) }

!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}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,LoopIdiomRecognizePass,LoopRotatePass,LoopSimplifyPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass