; LLVM IR from NCAR/FastEddy-model :: SRC/IO (ioVarsList)

; 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._ioVar_t = type { [128 x i8], [16 x i8], i32, [16 x i32], ptr, i32, ptr }

@head = external hidden global ptr, align 8

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

7:                                                ; preds = %21, %1
  %8 = load ptr, ptr %4, align 8, !tbaa !5
  %9 = getelementptr inbounds %struct._ioVar_t, ptr %8, i32 0, i32 0
  %10 = getelementptr inbounds [128 x i8], ptr %9, i64 0, i64 0
  %11 = load ptr, ptr %3, align 8, !tbaa !5
  %12 = call i32 @strcmp(ptr noundef %10, ptr noundef %11) #4
  %13 = icmp ne i32 %12, 0
  br i1 %13, label %14, label %19

14:                                               ; preds = %7
  %15 = load ptr, ptr %4, align 8, !tbaa !5
  %16 = getelementptr inbounds %struct._ioVar_t, ptr %15, i32 0, i32 6
  %17 = load ptr, ptr %16, align 8, !tbaa !9
  %18 = icmp ne ptr %17, null
  br label %19

19:                                               ; preds = %14, %7
  %20 = phi i1 [ false, %7 ], [ %18, %14 ]
  br i1 %20, label %21, label %25

21:                                               ; preds = %19
  %22 = load ptr, ptr %4, align 8, !tbaa !5
  %23 = getelementptr inbounds %struct._ioVar_t, ptr %22, i32 0, i32 6
  %24 = load ptr, ptr %23, align 8, !tbaa !9
  store ptr %24, ptr %4, align 8, !tbaa !5
  br label %7, !llvm.loop !12

25:                                               ; preds = %19
  %26 = load ptr, ptr %4, align 8, !tbaa !5
  %27 = getelementptr inbounds %struct._ioVar_t, ptr %26, i32 0, i32 0
  %28 = getelementptr inbounds [128 x i8], ptr %27, i64 0, i64 0
  %29 = load ptr, ptr %3, align 8, !tbaa !5
  %30 = call i32 @strcmp(ptr noundef %28, ptr noundef %29) #4
  %31 = icmp ne i32 %30, 0
  br i1 %31, label %32, label %33

32:                                               ; preds = %25
  store ptr null, ptr %2, align 8
  store i32 1, ptr %5, align 4
  br label %35

33:                                               ; preds = %25
  %34 = load ptr, ptr %4, align 8, !tbaa !5
  store ptr %34, ptr %2, align 8
  store i32 1, ptr %5, align 4
  br label %35

35:                                               ; preds = %33, %32
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #3
  %36 = load ptr, ptr %2, align 8
  ret ptr %36
}

; Function Attrs: nounwind willreturn memory(read)
declare i32 @strcmp(ptr noundef, ptr noundef) #2

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #2 = { nounwind willreturn memory(read) "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 willreturn memory(read) }

!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 232}
!10 = !{!"_ioVar_t", !7, i64 0, !7, i64 128, !11, i64 144, !7, i64 148, !6, i64 216, !11, i64 224, !6, i64 232}
!11 = !{!"int", !7, i64 0}
!12 = distinct !{!12, !13}
!13 = !{!"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"

@head = external hidden local_unnamed_addr global ptr, align 8

; Function Attrs: nofree nounwind memory(read, inaccessiblemem: none) uwtable
define dso_local noundef ptr @getNamedVarFromList(ptr nocapture noundef readonly %0) local_unnamed_addr #0 {
  %2 = load ptr, ptr @head, align 8, !tbaa !5
  br label %3

3:                                                ; preds = %5, %1
  %.0 = phi ptr [ %2, %1 ], [ %7, %5 ]
  %4 = tail call i32 @strcmp(ptr noundef nonnull dereferenceable(1) %.0, ptr noundef nonnull dereferenceable(1) %0) #2
  %.not = icmp eq i32 %4, 0
  br i1 %.not, label %.critedge, label %5

5:                                                ; preds = %3
  %6 = getelementptr inbounds i8, ptr %.0, i64 232
  %7 = load ptr, ptr %6, align 8, !tbaa !9
  %.not10 = icmp eq ptr %7, null
  br i1 %.not10, label %.critedge, label %3, !llvm.loop !12

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

; Function Attrs: mustprogress nofree nounwind willreturn memory(argmem: read)
declare i32 @strcmp(ptr nocapture noundef, ptr nocapture noundef) local_unnamed_addr #1

attributes #0 = { nofree nounwind memory(read, 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 = { mustprogress nofree nounwind willreturn memory(argmem: read) "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 willreturn memory(read) }

!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 232}
!10 = !{!"_ioVar_t", !7, i64 0, !7, i64 128, !11, i64 144, !7, i64 148, !6, i64 216, !11, i64 224, !6, i64 232}
!11 = !{!"int", !7, i64 0}
!12 = distinct !{!12, !13}
!13 = !{!"llvm.loop.mustprogress"}


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