; LLVM IR from devantler/software-engineering-f22-shared :: IOT/BudgetManagementExcercise-03-28/ESP-Project/components/components/nghttp (defined)

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

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

; Function Attrs: nounwind uwtable
declare hidden zeroext i8 @iv_get(ptr noundef, ptr noundef, i32 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: nounwind uwtable
define dso_local zeroext i8 @mrb_mod_cv_defined(ptr noundef %0, ptr noundef %1, i32 noundef %2) #1 {
  %4 = alloca i8, align 1
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  %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 i32 %2, ptr %7, align 4, !tbaa !9
  br label %10

10:                                               ; preds = %29, %3
  %11 = load ptr, ptr %6, align 8, !tbaa !5
  %12 = icmp ne ptr %11, null
  br i1 %12, label %13, label %30

13:                                               ; preds = %10
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #2
  %14 = load ptr, ptr %6, align 8, !tbaa !5
  %15 = getelementptr inbounds %struct.RClass, ptr %14, i32 0, i32 3
  %16 = load ptr, ptr %15, align 8, !tbaa !11
  store ptr %16, ptr %8, align 8, !tbaa !5
  %17 = load ptr, ptr %5, align 8, !tbaa !5
  %18 = load ptr, ptr %8, align 8, !tbaa !5
  %19 = load i32, ptr %7, align 4, !tbaa !9
  %20 = call zeroext i8 @iv_get(ptr noundef %17, ptr noundef %18, i32 noundef %19, ptr noundef null)
  %21 = icmp ne i8 %20, 0
  br i1 %21, label %22, label %23

22:                                               ; preds = %13
  store i8 1, ptr %4, align 1
  store i32 1, ptr %9, align 4
  br label %27

23:                                               ; preds = %13
  %24 = load ptr, ptr %6, align 8, !tbaa !5
  %25 = getelementptr inbounds %struct.RClass, ptr %24, i32 0, i32 5
  %26 = load ptr, ptr %25, align 8, !tbaa !13
  store ptr %26, ptr %6, align 8, !tbaa !5
  store i32 0, ptr %9, align 4
  br label %27

27:                                               ; preds = %23, %22
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #2
  %28 = load i32, ptr %9, align 4
  switch i32 %28, label %33 [
    i32 0, label %29
    i32 1, label %31
  ]

29:                                               ; preds = %27
  br label %10, !llvm.loop !14

30:                                               ; preds = %10
  store i8 0, ptr %4, align 1
  br label %31

31:                                               ; preds = %30, %27
  %32 = load i8, ptr %4, align 1
  ret i8 %32

33:                                               ; preds = %27
  unreachable
}

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, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !6, i64 24}
!12 = !{!"RClass", !10, i64 0, !10, i64 1, !10, i64 1, !6, i64 8, !6, i64 16, !6, i64 24, !6, i64 32, !6, i64 40}
!13 = !{!12, !6, i64 40}
!14 = distinct !{!14, !15}
!15 = !{!"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"

; Function Attrs: nounwind uwtable
declare hidden zeroext i8 @iv_get(ptr noundef, ptr noundef, i32 noundef, ptr noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local noundef zeroext i8 @mrb_mod_cv_defined(ptr noundef %0, ptr noundef readonly %1, i32 noundef %2) local_unnamed_addr #0 {
  %.not13 = icmp eq ptr %1, null
  br i1 %.not13, label %.thread, label %.lr.ph

.lr.ph:                                           ; preds = %3, %7
  %.0814 = phi ptr [ %9, %7 ], [ %1, %3 ]
  %4 = getelementptr inbounds i8, ptr %.0814, i64 24
  %5 = load ptr, ptr %4, align 8, !tbaa !5
  %6 = tail call zeroext i8 @iv_get(ptr noundef %0, ptr noundef %5, i32 noundef %2, ptr noundef null)
  %.not10.not = icmp eq i8 %6, 0
  br i1 %.not10.not, label %7, label %.thread

7:                                                ; preds = %.lr.ph
  %8 = getelementptr inbounds i8, ptr %.0814, i64 40
  %9 = load ptr, ptr %8, align 8, !tbaa !11
  %.not = icmp eq ptr %9, null
  br i1 %.not, label %.thread, label %.lr.ph

.thread:                                          ; preds = %7, %.lr.ph, %3
  %.2 = phi i8 [ 0, %3 ], [ 1, %.lr.ph ], [ 0, %7 ]
  ret i8 %.2
}

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" }

!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 = !{!"RClass", !7, i64 0, !7, i64 1, !7, i64 1, !10, i64 8, !10, i64 16, !10, i64 24, !10, i64 32, !10, i64 40}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"any pointer", !8, i64 0}
!11 = !{!6, !10, i64 40}


; Effective O3 passes: GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass