; LLVM IR from CactiLab/Sherloc-Cortex-M-CFVD :: Sherloc_runtime/evaluation/src/dijkstra (dijkstra_small)

; 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._QITEM = type { i32, i32, i32, ptr }

@qHead = external dso_local global ptr, align 8
@g_qCount = external dso_local global i32, align 4

; 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 @dequeue(ptr noundef %0, ptr noundef %1, ptr noundef %2) #1 {
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca ptr, align 8
  %8 = alloca ptr, align 8
  %9 = alloca i32, align 4
  store ptr %0, ptr %5, align 8, !tbaa !5
  store ptr %1, ptr %6, align 8, !tbaa !5
  store ptr %2, ptr %7, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #2
  %10 = load ptr, ptr @qHead, align 8, !tbaa !5
  store ptr %10, ptr %8, align 8, !tbaa !5
  %11 = load ptr, ptr @qHead, align 8, !tbaa !5
  %12 = icmp ne ptr %11, null
  br i1 %12, label %13, label %32

13:                                               ; preds = %3
  %14 = load ptr, ptr @qHead, align 8, !tbaa !5
  %15 = getelementptr inbounds %struct._QITEM, ptr %14, i32 0, i32 0
  %16 = load i32, ptr %15, align 8, !tbaa !9
  %17 = load ptr, ptr %5, align 8, !tbaa !5
  store i32 %16, ptr %17, align 4, !tbaa !12
  %18 = load ptr, ptr @qHead, align 8, !tbaa !5
  %19 = getelementptr inbounds %struct._QITEM, ptr %18, i32 0, i32 1
  %20 = load i32, ptr %19, align 4, !tbaa !13
  %21 = load ptr, ptr %6, align 8, !tbaa !5
  store i32 %20, ptr %21, align 4, !tbaa !12
  %22 = load ptr, ptr @qHead, align 8, !tbaa !5
  %23 = getelementptr inbounds %struct._QITEM, ptr %22, i32 0, i32 2
  %24 = load i32, ptr %23, align 8, !tbaa !14
  %25 = load ptr, ptr %7, align 8, !tbaa !5
  store i32 %24, ptr %25, align 4, !tbaa !12
  %26 = load ptr, ptr @qHead, align 8, !tbaa !5
  %27 = getelementptr inbounds %struct._QITEM, ptr %26, i32 0, i32 3
  %28 = load ptr, ptr %27, align 8, !tbaa !15
  store ptr %28, ptr @qHead, align 8, !tbaa !5
  %29 = load i32, ptr @g_qCount, align 4, !tbaa !12
  %30 = add nsw i32 %29, -1
  store i32 %30, ptr @g_qCount, align 4, !tbaa !12
  %31 = load ptr, ptr %8, align 8, !tbaa !5
  store ptr %31, ptr %4, align 8
  store i32 1, ptr %9, align 4
  br label %33

32:                                               ; preds = %3
  store ptr null, ptr %4, align 8
  store i32 1, ptr %9, align 4
  br label %33

33:                                               ; preds = %32, %13
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #2
  %34 = load ptr, ptr %4, align 8
  ret ptr %34
}

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 }

!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, !11, i64 0}
!10 = !{!"_QITEM", !11, i64 0, !11, i64 4, !11, i64 8, !6, i64 16}
!11 = !{!"int", !7, i64 0}
!12 = !{!11, !11, i64 0}
!13 = !{!10, !11, i64 4}
!14 = !{!10, !11, i64 8}
!15 = !{!10, !6, i64 16}


; 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"

@qHead = external dso_local local_unnamed_addr global ptr, align 8
@g_qCount = external dso_local local_unnamed_addr global i32, align 4

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(readwrite, inaccessiblemem: none) uwtable
define dso_local ptr @dequeue(ptr nocapture noundef writeonly %0, ptr nocapture noundef writeonly %1, ptr nocapture noundef writeonly %2) local_unnamed_addr #0 {
  %4 = load ptr, ptr @qHead, align 8, !tbaa !5
  %.not = icmp eq ptr %4, null
  br i1 %.not, label %15, label %5

5:                                                ; preds = %3
  %6 = load i32, ptr %4, align 8, !tbaa !9
  store i32 %6, ptr %0, align 4, !tbaa !12
  %7 = getelementptr inbounds i8, ptr %4, i64 4
  %8 = load i32, ptr %7, align 4, !tbaa !13
  store i32 %8, ptr %1, align 4, !tbaa !12
  %9 = getelementptr inbounds i8, ptr %4, i64 8
  %10 = load i32, ptr %9, align 8, !tbaa !14
  store i32 %10, ptr %2, align 4, !tbaa !12
  %11 = getelementptr inbounds i8, ptr %4, i64 16
  %12 = load ptr, ptr %11, align 8, !tbaa !15
  store ptr %12, ptr @qHead, align 8, !tbaa !5
  %13 = load i32, ptr @g_qCount, align 4, !tbaa !12
  %14 = add nsw i32 %13, -1
  store i32 %14, ptr @g_qCount, align 4, !tbaa !12
  br label %15

15:                                               ; preds = %3, %5
  ret ptr %4
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(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" }

!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, !11, i64 0}
!10 = !{!"_QITEM", !11, i64 0, !11, i64 4, !11, i64 8, !6, i64 16}
!11 = !{!"int", !7, i64 0}
!12 = !{!11, !11, i64 0}
!13 = !{!10, !11, i64 4}
!14 = !{!10, !11, i64 8}
!15 = !{!10, !6, i64 16}


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