; LLVM IR from nickmqb/muon :: bootstrap/mu.ll_string (hash__)

; 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.string__ = type { ptr, i32 }

; 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 dso_local i32 @string__hash__(ptr %0, i32 %1) #1 {
  %3 = alloca %struct.string__, align 8
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca ptr, align 8
  %7 = alloca i8, align 1
  %8 = getelementptr inbounds { ptr, i32 }, ptr %3, i32 0, i32 0
  store ptr %0, ptr %8, align 8
  %9 = getelementptr inbounds { ptr, i32 }, ptr %3, i32 0, i32 1
  store i32 %1, ptr %9, align 8
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #2
  store i32 -2128831035, ptr %4, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #2
  store i32 0, ptr %5, align 4, !tbaa !5
  br label %10

10:                                               ; preds = %15, %2
  %11 = load i32, ptr %5, align 4, !tbaa !5
  %12 = getelementptr inbounds %struct.string__, ptr %3, i32 0, i32 1
  %13 = load i32, ptr %12, align 8, !tbaa !9
  %14 = icmp slt i32 %11, %13
  br i1 %14, label %15, label %31

15:                                               ; preds = %10
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #2
  store ptr %3, ptr %6, align 8, !tbaa !12
  call void @llvm.lifetime.start.p0(i64 1, ptr %7) #2
  %16 = load ptr, ptr %6, align 8, !tbaa !12
  %17 = getelementptr inbounds %struct.string__, ptr %16, i32 0, i32 0
  %18 = load ptr, ptr %17, align 8, !tbaa !13
  %19 = load i32, ptr %5, align 4, !tbaa !5
  %20 = sext i32 %19 to i64
  %21 = getelementptr inbounds i8, ptr %18, i64 %20
  %22 = load i8, ptr %21, align 1, !tbaa !14
  store i8 %22, ptr %7, align 1, !tbaa !14
  %23 = load i32, ptr %4, align 4, !tbaa !5
  %24 = load i8, ptr %7, align 1, !tbaa !14
  %25 = zext i8 %24 to i32
  %26 = xor i32 %23, %25
  store i32 %26, ptr %4, align 4, !tbaa !5
  %27 = load i32, ptr %4, align 4, !tbaa !5
  %28 = mul i32 %27, 16777619
  store i32 %28, ptr %4, align 4, !tbaa !5
  %29 = load i32, ptr %5, align 4, !tbaa !5
  %30 = add nsw i32 %29, 1
  store i32 %30, ptr %5, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 1, ptr %7) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #2
  br label %10, !llvm.loop !15

31:                                               ; preds = %10
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #2
  %32 = load i32, ptr %4, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #2
  ret i32 %32
}

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, !6, i64 8}
!10 = !{!"", !11, i64 0, !6, i64 8}
!11 = !{!"any pointer", !7, i64 0}
!12 = !{!11, !11, i64 0}
!13 = !{!10, !11, i64 0}
!14 = !{!7, !7, i64 0}
!15 = distinct !{!15, !16}
!16 = !{!"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 i32 @string__hash__(ptr nocapture readonly %0, i32 %1) local_unnamed_addr #0 {
  %3 = icmp sgt i32 %1, 0
  br i1 %3, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %2
  %wide.trip.count = zext nneg i32 %1 to i64
  %xtraiter = and i64 %wide.trip.count, 3
  %4 = icmp ult i32 %1, 4
  br i1 %4, label %._crit_edge.loopexit.unr-lcssa, label %.lr.ph.preheader.new

.lr.ph.preheader.new:                             ; preds = %.lr.ph.preheader
  %unroll_iter = and i64 %wide.trip.count, 2147483644
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph, %.lr.ph.preheader.new
  %indvars.iv = phi i64 [ 0, %.lr.ph.preheader.new ], [ %indvars.iv.next.3, %.lr.ph ]
  %.09 = phi i32 [ -2128831035, %.lr.ph.preheader.new ], [ %24, %.lr.ph ]
  %niter = phi i64 [ 0, %.lr.ph.preheader.new ], [ %niter.next.3, %.lr.ph ]
  %5 = getelementptr inbounds i8, ptr %0, i64 %indvars.iv
  %6 = load i8, ptr %5, align 1, !tbaa !5
  %7 = zext i8 %6 to i32
  %8 = xor i32 %.09, %7
  %9 = mul i32 %8, 16777619
  %indvars.iv.next = or disjoint i64 %indvars.iv, 1
  %10 = getelementptr inbounds i8, ptr %0, i64 %indvars.iv.next
  %11 = load i8, ptr %10, align 1, !tbaa !5
  %12 = zext i8 %11 to i32
  %13 = xor i32 %9, %12
  %14 = mul i32 %13, 16777619
  %indvars.iv.next.1 = or disjoint i64 %indvars.iv, 2
  %15 = getelementptr inbounds i8, ptr %0, i64 %indvars.iv.next.1
  %16 = load i8, ptr %15, align 1, !tbaa !5
  %17 = zext i8 %16 to i32
  %18 = xor i32 %14, %17
  %19 = mul i32 %18, 16777619
  %indvars.iv.next.2 = or disjoint i64 %indvars.iv, 3
  %20 = getelementptr inbounds i8, ptr %0, i64 %indvars.iv.next.2
  %21 = load i8, ptr %20, align 1, !tbaa !5
  %22 = zext i8 %21 to i32
  %23 = xor i32 %19, %22
  %24 = mul i32 %23, 16777619
  %indvars.iv.next.3 = add nuw nsw i64 %indvars.iv, 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 i32 [ poison, %.lr.ph.preheader ], [ %24, %.lr.ph ]
  %indvars.iv.unr = phi i64 [ 0, %.lr.ph.preheader ], [ %indvars.iv.next.3, %.lr.ph ]
  %.09.unr = phi i32 [ -2128831035, %.lr.ph.preheader ], [ %24, %.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
  %indvars.iv.epil = phi i64 [ %indvars.iv.next.epil, %.lr.ph.epil ], [ %indvars.iv.unr, %._crit_edge.loopexit.unr-lcssa ]
  %.09.epil = phi i32 [ %29, %.lr.ph.epil ], [ %.09.unr, %._crit_edge.loopexit.unr-lcssa ]
  %epil.iter = phi i64 [ %epil.iter.next, %.lr.ph.epil ], [ 0, %._crit_edge.loopexit.unr-lcssa ]
  %25 = getelementptr inbounds i8, ptr %0, i64 %indvars.iv.epil
  %26 = load i8, ptr %25, align 1, !tbaa !5
  %27 = zext i8 %26 to i32
  %28 = xor i32 %.09.epil, %27
  %29 = mul i32 %28, 16777619
  %indvars.iv.next.epil = add nuw nsw i64 %indvars.iv.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
  %.0.lcssa = phi i32 [ -2128831035, %2 ], [ %.lcssa.ph, %._crit_edge.loopexit.unr-lcssa ], [ %29, %.lr.ph.epil ]
  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"}
!10 = distinct !{!10, !11}
!11 = !{!"llvm.loop.unroll.disable"}


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