; LLVM IR from tum-i4/obfuscation-benchmarks :: simple-hash-functions (fnvhash)

; 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 i32 @FNVHash(ptr noundef %0, i32 noundef %1) #0 {
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #2
  store i32 -2128831035, ptr %5, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #2
  store i32 0, ptr %6, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #2
  store i32 0, ptr %7, align 4, !tbaa !9
  store i32 0, ptr %7, align 4, !tbaa !9
  br label %8

8:                                                ; preds = %20, %2
  %9 = load i32, ptr %7, align 4, !tbaa !9
  %10 = load i32, ptr %4, align 4, !tbaa !9
  %11 = icmp ult i32 %9, %10
  br i1 %11, label %12, label %25

12:                                               ; preds = %8
  %13 = load i32, ptr %6, align 4, !tbaa !9
  %14 = mul i32 %13, -2128831035
  store i32 %14, ptr %6, align 4, !tbaa !9
  %15 = load ptr, ptr %3, align 8, !tbaa !5
  %16 = load i8, ptr %15, align 1, !tbaa !11
  %17 = sext i8 %16 to i32
  %18 = load i32, ptr %6, align 4, !tbaa !9
  %19 = xor i32 %18, %17
  store i32 %19, ptr %6, align 4, !tbaa !9
  br label %20

20:                                               ; preds = %12
  %21 = load ptr, ptr %3, align 8, !tbaa !5
  %22 = getelementptr inbounds i8, ptr %21, i32 1
  store ptr %22, ptr %3, align 8, !tbaa !5
  %23 = load i32, ptr %7, align 4, !tbaa !9
  %24 = add i32 %23, 1
  store i32 %24, ptr %7, align 4, !tbaa !9
  br label %8, !llvm.loop !12

25:                                               ; preds = %8
  %26 = load i32, ptr %6, align 4, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #2
  ret i32 %26
}

; 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 = !{!"int", !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(read, inaccessiblemem: none) uwtable
define dso_local i32 @FNVHash(ptr nocapture noundef readonly %0, i32 noundef %1) local_unnamed_addr #0 {
  %.not = icmp eq i32 %1, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph.preheader

.lr.ph.preheader:                                 ; preds = %2
  %xtraiter = and i32 %1, 3
  %3 = icmp ult i32 %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 i32 %1, -4
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph, %.lr.ph.preheader.new
  %.0710 = phi i32 [ 0, %.lr.ph.preheader.new ], [ %22, %.lr.ph ]
  %.089 = phi ptr [ %0, %.lr.ph.preheader.new ], [ %23, %.lr.ph ]
  %niter = phi i32 [ 0, %.lr.ph.preheader.new ], [ %niter.next.3, %.lr.ph ]
  %4 = mul i32 %.0710, -2128831035
  %5 = load i8, ptr %.089, align 1, !tbaa !5
  %6 = sext i8 %5 to i32
  %7 = xor i32 %4, %6
  %8 = getelementptr inbounds i8, ptr %.089, i64 1
  %9 = mul i32 %7, -2128831035
  %10 = load i8, ptr %8, align 1, !tbaa !5
  %11 = sext i8 %10 to i32
  %12 = xor i32 %9, %11
  %13 = getelementptr inbounds i8, ptr %.089, i64 2
  %14 = mul i32 %12, -2128831035
  %15 = load i8, ptr %13, align 1, !tbaa !5
  %16 = sext i8 %15 to i32
  %17 = xor i32 %14, %16
  %18 = getelementptr inbounds i8, ptr %.089, i64 3
  %19 = mul i32 %17, -2128831035
  %20 = load i8, ptr %18, align 1, !tbaa !5
  %21 = sext i8 %20 to i32
  %22 = xor i32 %19, %21
  %23 = getelementptr inbounds i8, ptr %.089, i64 4
  %niter.next.3 = add i32 %niter, 4
  %niter.ncmp.3 = icmp eq i32 %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 i32 [ poison, %.lr.ph.preheader ], [ %22, %.lr.ph ]
  %.0710.unr = phi i32 [ 0, %.lr.ph.preheader ], [ %22, %.lr.ph ]
  %.089.unr = phi ptr [ %0, %.lr.ph.preheader ], [ %23, %.lr.ph ]
  %lcmp.mod.not = icmp eq i32 %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
  %.0710.epil = phi i32 [ %27, %.lr.ph.epil ], [ %.0710.unr, %._crit_edge.loopexit.unr-lcssa ]
  %.089.epil = phi ptr [ %28, %.lr.ph.epil ], [ %.089.unr, %._crit_edge.loopexit.unr-lcssa ]
  %epil.iter = phi i32 [ %epil.iter.next, %.lr.ph.epil ], [ 0, %._crit_edge.loopexit.unr-lcssa ]
  %24 = mul i32 %.0710.epil, -2128831035
  %25 = load i8, ptr %.089.epil, align 1, !tbaa !5
  %26 = sext i8 %25 to i32
  %27 = xor i32 %24, %26
  %28 = getelementptr inbounds i8, ptr %.089.epil, i64 1
  %epil.iter.next = add i32 %epil.iter, 1
  %epil.iter.cmp.not = icmp eq i32 %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 i32 [ 0, %2 ], [ %.lcssa.ph, %._crit_edge.loopexit.unr-lcssa ], [ %27, %.lr.ph.epil ]
  ret i32 %.07.lcssa
}

attributes #0 = { nofree norecurse nosync nounwind 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, !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