; LLVM IR from openssl/openssl :: crypto/hashtable (hashfunc)

; 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: nounwind uwtable
define dso_local i64 @ossl_fnv1a_hash(ptr noundef %0, i64 noundef %1) #0 {
  %3 = alloca ptr, align 8
  %4 = alloca i64, align 8
  %5 = alloca i64, align 8
  %6 = alloca i64, align 8
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i64 %1, ptr %4, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #2
  store i64 -3750763034362895579, ptr %5, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #2
  store i64 0, ptr %6, align 8, !tbaa !9
  br label %7

7:                                                ; preds = %21, %2
  %8 = load i64, ptr %6, align 8, !tbaa !9
  %9 = load i64, ptr %4, align 8, !tbaa !9
  %10 = icmp ult i64 %8, %9
  br i1 %10, label %11, label %24

11:                                               ; preds = %7
  %12 = load ptr, ptr %3, align 8, !tbaa !5
  %13 = load i64, ptr %6, align 8, !tbaa !9
  %14 = getelementptr inbounds i8, ptr %12, i64 %13
  %15 = load i8, ptr %14, align 1, !tbaa !11
  %16 = zext i8 %15 to i64
  %17 = load i64, ptr %5, align 8, !tbaa !9
  %18 = xor i64 %17, %16
  store i64 %18, ptr %5, align 8, !tbaa !9
  %19 = load i64, ptr %5, align 8, !tbaa !9
  %20 = mul i64 %19, 1099511628211
  store i64 %20, ptr %5, align 8, !tbaa !9
  br label %21

21:                                               ; preds = %11
  %22 = load i64, ptr %6, align 8, !tbaa !9
  %23 = add i64 %22, 1
  store i64 %23, ptr %6, align 8, !tbaa !9
  br label %7, !llvm.loop !12

24:                                               ; preds = %7
  %25 = load i64, ptr %5, align 8, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #2
  ret i64 %25
}

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

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

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" }
attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = !{!7, !7, i64 0}
!12 = distinct !{!12, !13}
!13 = !{!"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 dso_local i64 @ossl_fnv1a_hash(ptr nocapture noundef readonly %0, i64 noundef %1) local_unnamed_addr #0 {
  %.not = icmp eq i64 %1, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph.preheader

.lr.ph.preheader:                                 ; preds = %2
  %xtraiter = and i64 %1, 3
  %3 = icmp ult i64 %1, 4
  br i1 %3, label %._crit_edge.loopexit.unr-lcssa, label %.lr.ph.preheader.new

.lr.ph.preheader.new:                             ; preds = %.lr.ph.preheader
  %unroll_iter = and i64 %1, -4
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph, %.lr.ph.preheader.new
  %.09 = phi i64 [ 0, %.lr.ph.preheader.new ], [ %27, %.lr.ph ]
  %.078 = phi i64 [ -3750763034362895579, %.lr.ph.preheader.new ], [ %26, %.lr.ph ]
  %niter = phi i64 [ 0, %.lr.ph.preheader.new ], [ %niter.next.3, %.lr.ph ]
  %4 = getelementptr inbounds i8, ptr %0, i64 %.09
  %5 = load i8, ptr %4, align 1, !tbaa !5
  %6 = zext i8 %5 to i64
  %7 = xor i64 %.078, %6
  %8 = mul i64 %7, 1099511628211
  %9 = or disjoint i64 %.09, 1
  %10 = getelementptr inbounds i8, ptr %0, i64 %9
  %11 = load i8, ptr %10, align 1, !tbaa !5
  %12 = zext i8 %11 to i64
  %13 = xor i64 %8, %12
  %14 = mul i64 %13, 1099511628211
  %15 = or disjoint i64 %.09, 2
  %16 = getelementptr inbounds i8, ptr %0, i64 %15
  %17 = load i8, ptr %16, align 1, !tbaa !5
  %18 = zext i8 %17 to i64
  %19 = xor i64 %14, %18
  %20 = mul i64 %19, 1099511628211
  %21 = or disjoint i64 %.09, 3
  %22 = getelementptr inbounds i8, ptr %0, i64 %21
  %23 = load i8, ptr %22, align 1, !tbaa !5
  %24 = zext i8 %23 to i64
  %25 = xor i64 %20, %24
  %26 = mul i64 %25, 1099511628211
  %27 = add nuw i64 %.09, 4
  %niter.next.3 = add i64 %niter, 4
  %niter.ncmp.3 = icmp eq i64 %niter.next.3, %unroll_iter
  br i1 %niter.ncmp.3, label %._crit_edge.loopexit.unr-lcssa, label %.lr.ph, !llvm.loop !8

._crit_edge.loopexit.unr-lcssa:                   ; preds = %.lr.ph, %.lr.ph.preheader
  %.lcssa.ph = phi i64 [ poison, %.lr.ph.preheader ], [ %26, %.lr.ph ]
  %.09.unr = phi i64 [ 0, %.lr.ph.preheader ], [ %27, %.lr.ph ]
  %.078.unr = phi i64 [ -3750763034362895579, %.lr.ph.preheader ], [ %26, %.lr.ph ]
  %lcmp.mod.not = icmp eq i64 %xtraiter, 0
  br i1 %lcmp.mod.not, label %._crit_edge, label %.lr.ph.epil

.lr.ph.epil:                                      ; preds = %._crit_edge.loopexit.unr-lcssa, %.lr.ph.epil
  %.09.epil = phi i64 [ %33, %.lr.ph.epil ], [ %.09.unr, %._crit_edge.loopexit.unr-lcssa ]
  %.078.epil = phi i64 [ %32, %.lr.ph.epil ], [ %.078.unr, %._crit_edge.loopexit.unr-lcssa ]
  %epil.iter = phi i64 [ %epil.iter.next, %.lr.ph.epil ], [ 0, %._crit_edge.loopexit.unr-lcssa ]
  %28 = getelementptr inbounds i8, ptr %0, i64 %.09.epil
  %29 = load i8, ptr %28, align 1, !tbaa !5
  %30 = zext i8 %29 to i64
  %31 = xor i64 %.078.epil, %30
  %32 = mul i64 %31, 1099511628211
  %33 = add nuw i64 %.09.epil, 1
  %epil.iter.next = add i64 %epil.iter, 1
  %epil.iter.cmp.not = icmp eq i64 %epil.iter.next, %xtraiter
  br i1 %epil.iter.cmp.not, label %._crit_edge, label %.lr.ph.epil, !llvm.loop !10

._crit_edge:                                      ; preds = %._crit_edge.loopexit.unr-lcssa, %.lr.ph.epil, %2
  %.07.lcssa = phi i64 [ -3750763034362895579, %2 ], [ %.lcssa.ph, %._crit_edge.loopexit.unr-lcssa ], [ %32, %.lr.ph.epil ]
  ret i64 %.07.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"}
!10 = distinct !{!10, !11}
!11 = !{!"llvm.loop.unroll.disable"}


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