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

; 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.mrb_value = type { %union.anon, i32 }
%union.anon = type { double }
%struct.RData = type { i32, ptr, ptr, ptr, ptr, ptr }

; Function Attrs: nounwind uwtable
define dso_local ptr @mrb_data_check_get_ptr(ptr noundef %0, i64 %1, i32 %2, ptr noundef %3) #0 {
  %5 = alloca ptr, align 8
  %6 = alloca %struct.mrb_value, align 8
  %7 = alloca ptr, align 8
  %8 = alloca ptr, align 8
  %9 = getelementptr inbounds { i64, i32 }, ptr %6, i32 0, i32 0
  store i64 %1, ptr %9, align 8
  %10 = getelementptr inbounds { i64, i32 }, ptr %6, i32 0, i32 1
  store i32 %2, ptr %10, align 8
  store ptr %0, ptr %7, align 8, !tbaa !5
  store ptr %3, ptr %8, align 8, !tbaa !5
  %11 = getelementptr inbounds %struct.mrb_value, ptr %6, i32 0, i32 1
  %12 = load i32, ptr %11, align 8, !tbaa !9
  %13 = icmp ne i32 %12, 21
  br i1 %13, label %14, label %15

14:                                               ; preds = %4
  store ptr null, ptr %5, align 8
  br label %28

15:                                               ; preds = %4
  %16 = getelementptr inbounds %struct.mrb_value, ptr %6, i32 0, i32 0
  %17 = load ptr, ptr %16, align 8, !tbaa !12
  %18 = getelementptr inbounds %struct.RData, ptr %17, i32 0, i32 4
  %19 = load ptr, ptr %18, align 8, !tbaa !13
  %20 = load ptr, ptr %8, align 8, !tbaa !5
  %21 = icmp ne ptr %19, %20
  br i1 %21, label %22, label %23

22:                                               ; preds = %15
  store ptr null, ptr %5, align 8
  br label %28

23:                                               ; preds = %15
  %24 = getelementptr inbounds %struct.mrb_value, ptr %6, i32 0, i32 0
  %25 = load ptr, ptr %24, align 8, !tbaa !12
  %26 = getelementptr inbounds %struct.RData, ptr %25, i32 0, i32 5
  %27 = load ptr, ptr %26, align 8, !tbaa !15
  store ptr %27, ptr %5, align 8
  br label %28

28:                                               ; preds = %23, %22, %14
  %29 = load ptr, ptr %5, align 8
  ret ptr %29
}

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, !6, i64 0}
!6 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !11, i64 8}
!10 = !{!"mrb_value", !7, i64 0, !11, i64 8}
!11 = !{!"int", !7, i64 0}
!12 = !{!7, !7, i64 0}
!13 = !{!14, !6, i64 32}
!14 = !{!"RData", !11, i64 0, !11, i64 1, !11, i64 1, !6, i64 8, !6, i64 16, !6, i64 24, !6, i64 32, !6, i64 40}
!15 = !{!14, !6, i64 40}


; 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 norecurse nosync nounwind willreturn memory(read, inaccessiblemem: none) uwtable
define dso_local ptr @mrb_data_check_get_ptr(ptr nocapture noundef readnone %0, i64 %1, i32 %2, ptr noundef readnone %3) local_unnamed_addr #0 {
  %.not = icmp eq i32 %2, 21
  %5 = inttoptr i64 %1 to ptr
  br i1 %.not, label %6, label %12

6:                                                ; preds = %4
  %7 = getelementptr inbounds i8, ptr %5, i64 32
  %8 = load ptr, ptr %7, align 8, !tbaa !5
  %.not3 = icmp eq ptr %8, %3
  br i1 %.not3, label %9, label %12

9:                                                ; preds = %6
  %10 = getelementptr inbounds i8, ptr %5, i64 40
  %11 = load ptr, ptr %10, align 8, !tbaa !11
  br label %12

12:                                               ; preds = %6, %4, %9
  %.0 = phi ptr [ %11, %9 ], [ null, %4 ], [ null, %6 ]
  ret ptr %.0
}

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

!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 32}
!6 = !{!"RData", !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: EarlyCSEPass,GVNPass,GlobalOptPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass