; LLVM IR from cvitatma/DSA :: 09-Hashing (HashTable)

; 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.stHT = type { i32, ptr }
%struct.stNode = type { i32, [1000000 x i32], ptr }

; 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
declare dso_local i32 @getHash(i32 noundef, ptr noundef) #1

; Function Attrs: nounwind uwtable
define dso_local ptr @FindInTable(i32 noundef %0, ptr noundef %1) #1 {
  %3 = alloca i32, align 4
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  store i32 %0, ptr %3, align 4, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #2
  store ptr null, ptr %5, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #2
  %7 = load i32, ptr %3, align 4, !tbaa !5
  %8 = load ptr, ptr %4, align 8, !tbaa !9
  %9 = call i32 @getHash(i32 noundef %7, ptr noundef %8)
  store i32 %9, ptr %6, align 4, !tbaa !5
  %10 = load ptr, ptr %4, align 8, !tbaa !9
  %11 = getelementptr inbounds %struct.stHT, ptr %10, i32 0, i32 1
  %12 = load ptr, ptr %11, align 8, !tbaa !11
  %13 = load i32, ptr %6, align 4, !tbaa !5
  %14 = sext i32 %13 to i64
  %15 = getelementptr inbounds ptr, ptr %12, i64 %14
  %16 = load ptr, ptr %15, align 8, !tbaa !9
  %17 = getelementptr inbounds %struct.stNode, ptr %16, i32 0, i32 2
  %18 = load ptr, ptr %17, align 8, !tbaa !13
  store ptr %18, ptr %5, align 8, !tbaa !9
  br label %19

19:                                               ; preds = %30, %2
  %20 = load ptr, ptr %5, align 8, !tbaa !9
  %21 = icmp ne ptr %20, null
  br i1 %21, label %22, label %28

22:                                               ; preds = %19
  %23 = load ptr, ptr %5, align 8, !tbaa !9
  %24 = getelementptr inbounds %struct.stNode, ptr %23, i32 0, i32 0
  %25 = load i32, ptr %24, align 8, !tbaa !15
  %26 = load i32, ptr %3, align 4, !tbaa !5
  %27 = icmp ne i32 %25, %26
  br label %28

28:                                               ; preds = %22, %19
  %29 = phi i1 [ false, %19 ], [ %27, %22 ]
  br i1 %29, label %30, label %34

30:                                               ; preds = %28
  %31 = load ptr, ptr %5, align 8, !tbaa !9
  %32 = getelementptr inbounds %struct.stNode, ptr %31, i32 0, i32 2
  %33 = load ptr, ptr %32, align 8, !tbaa !13
  store ptr %33, ptr %5, align 8, !tbaa !9
  br label %19, !llvm.loop !16

34:                                               ; preds = %28
  %35 = load ptr, ptr %5, align 8, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #2
  ret ptr %35
}

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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = !{!12, !10, i64 8}
!12 = !{!"stHT", !6, i64 0, !10, i64 8}
!13 = !{!14, !10, i64 4000008}
!14 = !{!"stNode", !6, i64 0, !7, i64 4, !10, i64 4000008}
!15 = !{!14, !6, i64 0}
!16 = distinct !{!16, !17}
!17 = !{!"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 dso_local i32 @getHash(i32 noundef, ptr noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local ptr @FindInTable(i32 noundef %0, ptr noundef %1) local_unnamed_addr #0 {
  %3 = tail call i32 @getHash(i32 noundef %0, ptr noundef %1)
  %4 = getelementptr inbounds i8, ptr %1, i64 8
  %5 = load ptr, ptr %4, align 8, !tbaa !5
  %6 = sext i32 %3 to i64
  %7 = getelementptr inbounds ptr, ptr %5, i64 %6
  %8 = load ptr, ptr %7, align 8, !tbaa !11
  br label %9

9:                                                ; preds = %10, %2
  %.pn = phi ptr [ %8, %2 ], [ %.0, %10 ]
  %.0.in = getelementptr inbounds i8, ptr %.pn, i64 4000008
  %.0 = load ptr, ptr %.0.in, align 8, !tbaa !12
  %.not = icmp eq ptr %.0, null
  br i1 %.not, label %.critedge, label %10

10:                                               ; preds = %9
  %11 = load i32, ptr %.0, align 8, !tbaa !14
  %.not8 = icmp eq i32 %11, %0
  br i1 %.not8, label %.critedge, label %9, !llvm.loop !15

.critedge:                                        ; preds = %9, %10
  ret ptr %.0
}

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 8}
!6 = !{!"stHT", !7, i64 0, !10, i64 8}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"any pointer", !8, i64 0}
!11 = !{!10, !10, i64 0}
!12 = !{!13, !10, i64 4000008}
!13 = !{!"stNode", !7, i64 0, !8, i64 4, !10, i64 4000008}
!14 = !{!13, !7, i64 0}
!15 = distinct !{!15, !16}
!16 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,LCSSAPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass