; LLVM IR from ejoy/ejoy2d :: lua (lstring)

; 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"

; 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 hidden i32 @luaS_hash(ptr noundef %0, i64 noundef %1, i32 noundef %2) #1 {
  %4 = alloca ptr, align 8
  %5 = alloca i64, align 8
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca i64, align 8
  %9 = alloca i64, align 8
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i64 %1, ptr %5, align 8, !tbaa !9
  store i32 %2, ptr %6, align 4, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #2
  %10 = load i32, ptr %6, align 4, !tbaa !11
  %11 = load i64, ptr %5, align 8, !tbaa !9
  %12 = trunc i64 %11 to i32
  %13 = xor i32 %10, %12
  store i32 %13, ptr %7, align 4, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #2
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #2
  %14 = load i64, ptr %5, align 8, !tbaa !9
  %15 = lshr i64 %14, 5
  %16 = add i64 %15, 1
  store i64 %16, ptr %9, align 8, !tbaa !9
  %17 = load i64, ptr %5, align 8, !tbaa !9
  store i64 %17, ptr %8, align 8, !tbaa !9
  br label %18

18:                                               ; preds = %37, %3
  %19 = load i64, ptr %8, align 8, !tbaa !9
  %20 = load i64, ptr %9, align 8, !tbaa !9
  %21 = icmp uge i64 %19, %20
  br i1 %21, label %22, label %41

22:                                               ; preds = %18
  %23 = load i32, ptr %7, align 4, !tbaa !11
  %24 = load i32, ptr %7, align 4, !tbaa !11
  %25 = shl i32 %24, 5
  %26 = load i32, ptr %7, align 4, !tbaa !11
  %27 = lshr i32 %26, 2
  %28 = add i32 %25, %27
  %29 = load ptr, ptr %4, align 8, !tbaa !5
  %30 = load i64, ptr %8, align 8, !tbaa !9
  %31 = sub i64 %30, 1
  %32 = getelementptr inbounds i8, ptr %29, i64 %31
  %33 = load i8, ptr %32, align 1, !tbaa !13
  %34 = zext i8 %33 to i32
  %35 = add i32 %28, %34
  %36 = xor i32 %23, %35
  store i32 %36, ptr %7, align 4, !tbaa !11
  br label %37

37:                                               ; preds = %22
  %38 = load i64, ptr %9, align 8, !tbaa !9
  %39 = load i64, ptr %8, align 8, !tbaa !9
  %40 = sub i64 %39, %38
  store i64 %40, ptr %8, align 8, !tbaa !9
  br label %18, !llvm.loop !14

41:                                               ; preds = %18
  %42 = load i32, ptr %7, align 4, !tbaa !11
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #2
  ret i32 %42
}

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 = !{!"long", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"int", !7, i64 0}
!13 = !{!7, !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"

; Function Attrs: nofree norecurse nosync nounwind memory(argmem: read) uwtable
define hidden i32 @luaS_hash(ptr nocapture noundef readonly %0, i64 noundef %1, i32 noundef %2) local_unnamed_addr #0 {
  %4 = trunc i64 %1 to i32
  %5 = xor i32 %4, %2
  %6 = lshr i64 %1, 5
  %.neg = xor i64 %6, -1
  %invariant.gep = getelementptr i8, ptr %0, i64 -1
  %.not.not15.not = icmp eq i64 %1, 0
  br i1 %.not.not15.not, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %3, %.lr.ph
  %.017 = phi i32 [ %13, %.lr.ph ], [ %5, %3 ]
  %.01316 = phi i64 [ %14, %.lr.ph ], [ %1, %3 ]
  %7 = shl i32 %.017, 5
  %8 = lshr i32 %.017, 2
  %9 = add i32 %7, %8
  %gep = getelementptr i8, ptr %invariant.gep, i64 %.01316
  %10 = load i8, ptr %gep, align 1, !tbaa !5
  %11 = zext i8 %10 to i32
  %12 = add i32 %9, %11
  %13 = xor i32 %12, %.017
  %14 = add i64 %.01316, %.neg
  %.not.not = icmp ugt i64 %14, %6
  br i1 %.not.not, label %.lr.ph, label %._crit_edge, !llvm.loop !8

._crit_edge:                                      ; preds = %.lr.ph, %3
  %.0.lcssa = phi i32 [ %5, %3 ], [ %13, %.lr.ph ]
  ret i32 %.0.lcssa
}

attributes #0 = { nofree norecurse nosync nounwind memory(argmem: 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" }

!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 = !{!"omnipotent char", !7, i64 0}
!7 = !{!"Simple C/C++ TBAA"}
!8 = distinct !{!8, !9}
!9 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: GVNPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass