; LLVM IR from intuitive-robots/mdt_policy :: pyhash-0.9.3/src/smhasher/main.ll (Z8findHashPKc)

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

@g_hashes = external dso_local global [63 x %struct.HashInfo], align 16

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef ptr @_Z8findHashPKc(ptr noundef %0) #0 {
  %2 = alloca ptr, align 8
  %3 = alloca ptr, align 8
  %4 = alloca i64, 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 i64 0, ptr %4, align 8, !tbaa !9
  br label %6

6:                                                ; preds = %22, %1
  %7 = load i64, ptr %4, align 8, !tbaa !9
  %8 = icmp ult i64 %7, 63
  br i1 %8, label %10, label %9

9:                                                ; preds = %6
  store i32 2, ptr %5, align 4
  br label %25

10:                                               ; preds = %6
  %11 = load ptr, ptr %3, align 8, !tbaa !5
  %12 = load i64, ptr %4, align 8, !tbaa !9
  %13 = getelementptr inbounds [63 x %struct.HashInfo], ptr @g_hashes, i64 0, i64 %12
  %14 = getelementptr inbounds %struct.HashInfo, ptr %13, i32 0, i32 3
  %15 = load ptr, ptr %14, align 16, !tbaa !11
  %16 = call i32 @strcasecmp(ptr noundef %11, ptr noundef %15) #4
  %17 = icmp eq i32 %16, 0
  br i1 %17, label %18, label %21

18:                                               ; preds = %10
  %19 = load i64, ptr %4, align 8, !tbaa !9
  %20 = getelementptr inbounds [63 x %struct.HashInfo], ptr @g_hashes, i64 0, i64 %19
  store ptr %20, ptr %2, align 8
  store i32 1, ptr %5, align 4
  br label %25

21:                                               ; preds = %10
  br label %22

22:                                               ; preds = %21
  %23 = load i64, ptr %4, align 8, !tbaa !9
  %24 = add i64 %23, 1
  store i64 %24, ptr %4, align 8, !tbaa !9
  br label %6, !llvm.loop !14

25:                                               ; preds = %18, %9
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #3
  %26 = load i32, ptr %5, align 4
  switch i32 %26, label %30 [
    i32 2, label %27
    i32 1, label %28
  ]

27:                                               ; preds = %25
  store ptr null, ptr %2, align 8
  br label %28

28:                                               ; preds = %27, %25
  %29 = load ptr, ptr %2, align 8
  ret ptr %29

30:                                               ; preds = %25
  unreachable
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

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

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

attributes #0 = { mustprogress 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 #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"long", !7, i64 0}
!11 = !{!12, !6, i64 16}
!12 = !{!"_ZTS8HashInfo", !6, i64 0, !13, i64 8, !13, i64 12, !6, i64 16, !6, i64 24}
!13 = !{!"int", !7, i64 0}
!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"

%struct.HashInfo = type { ptr, i32, i32, ptr, ptr }

@g_hashes = external dso_local global [63 x %struct.HashInfo], align 16

; Function Attrs: mustprogress nofree nounwind willreturn memory(read) uwtable
define dso_local noundef ptr @_Z8findHashPKc(ptr nocapture noundef readonly %0) local_unnamed_addr #0 {
  br label %4

2:                                                ; preds = %4
  %3 = add nuw nsw i64 %.068, 1
  %exitcond = icmp eq i64 %3, 63
  br i1 %exitcond, label %10, label %4, !llvm.loop !5

4:                                                ; preds = %1, %2
  %.068 = phi i64 [ 0, %1 ], [ %3, %2 ]
  %5 = getelementptr inbounds [63 x %struct.HashInfo], ptr @g_hashes, i64 0, i64 %.068
  %6 = getelementptr inbounds i8, ptr %5, i64 16
  %7 = load ptr, ptr %6, align 16, !tbaa !7
  %8 = tail call i32 @strcasecmp(ptr noundef %0, ptr noundef %7) #2
  %9 = icmp eq i32 %8, 0
  br i1 %9, label %10, label %2

10:                                               ; preds = %4, %2
  %spec.select = phi ptr [ null, %2 ], [ %5, %4 ]
  ret ptr %spec.select
}

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

attributes #0 = { mustprogress nofree nounwind willreturn memory(read) 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(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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}
!7 = !{!8, !9, i64 16}
!8 = !{!"_ZTS8HashInfo", !9, i64 0, !12, i64 8, !12, i64 12, !9, i64 16, !9, i64 24}
!9 = !{!"any pointer", !10, i64 0}
!10 = !{!"omnipotent char", !11, i64 0}
!11 = !{!"Simple C++ TBAA"}
!12 = !{!"int", !10, i64 0}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,LoopRotatePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass