; LLVM IR from musetronstar/tagd :: tagl/src (lemon)

; 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.acttab = type { i32, i32, ptr, ptr, i32, i32, i32, i32, i32, i32, i32 }
%struct.lookahead_action = type { i32, 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 @acttab_action_size(ptr noundef %0) #1 {
  %2 = alloca ptr, align 8
  %3 = alloca i32, align 4
  store ptr %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #2
  %4 = load ptr, ptr %2, align 8, !tbaa !5
  %5 = getelementptr inbounds %struct.acttab, ptr %4, i32 0, i32 0
  %6 = load i32, ptr %5, align 8, !tbaa !9
  store i32 %6, ptr %3, align 4, !tbaa !12
  br label %7

7:                                                ; preds = %23, %1
  %8 = load i32, ptr %3, align 4, !tbaa !12
  %9 = icmp sgt i32 %8, 0
  br i1 %9, label %10, label %21

10:                                               ; preds = %7
  %11 = load ptr, ptr %2, align 8, !tbaa !5
  %12 = getelementptr inbounds %struct.acttab, ptr %11, i32 0, i32 2
  %13 = load ptr, ptr %12, align 8, !tbaa !13
  %14 = load i32, ptr %3, align 4, !tbaa !12
  %15 = sub nsw i32 %14, 1
  %16 = sext i32 %15 to i64
  %17 = getelementptr inbounds %struct.lookahead_action, ptr %13, i64 %16
  %18 = getelementptr inbounds %struct.lookahead_action, ptr %17, i32 0, i32 0
  %19 = load i32, ptr %18, align 4, !tbaa !14
  %20 = icmp slt i32 %19, 0
  br label %21

21:                                               ; preds = %10, %7
  %22 = phi i1 [ false, %7 ], [ %20, %10 ]
  br i1 %22, label %23, label %26

23:                                               ; preds = %21
  %24 = load i32, ptr %3, align 4, !tbaa !12
  %25 = add nsw i32 %24, -1
  store i32 %25, ptr %3, align 4, !tbaa !12
  br label %7, !llvm.loop !16

26:                                               ; preds = %21
  %27 = load i32, ptr %3, align 4, !tbaa !12
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #2
  ret i32 %27
}

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, !11, i64 0}
!10 = !{!"acttab", !11, i64 0, !11, i64 4, !6, i64 8, !6, i64 16, !11, i64 24, !11, i64 28, !11, i64 32, !11, i64 36, !11, i64 40, !11, i64 44, !11, i64 48}
!11 = !{!"int", !7, i64 0}
!12 = !{!11, !11, i64 0}
!13 = !{!10, !6, i64 8}
!14 = !{!15, !11, i64 0}
!15 = !{!"lookahead_action", !11, i64 0, !11, i64 4}
!16 = distinct !{!16, !17}
!17 = !{!"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.lookahead_action = type { i32, i32 }

; Function Attrs: nofree norecurse nosync nounwind memory(read, inaccessiblemem: none) uwtable
define dso_local i32 @acttab_action_size(ptr nocapture noundef readonly %0) local_unnamed_addr #0 {
  %2 = load i32, ptr %0, align 8, !tbaa !5
  %3 = icmp sgt i32 %2, 0
  br i1 %3, label %.lr.ph, label %.critedge

.lr.ph:                                           ; preds = %1
  %4 = getelementptr inbounds i8, ptr %0, i64 8
  %5 = load ptr, ptr %4, align 8, !tbaa !11
  %invariant.gep = getelementptr i8, ptr %5, i64 -8
  br label %6

6:                                                ; preds = %.lr.ph, %10
  %.05 = phi i32 [ %2, %.lr.ph ], [ %11, %10 ]
  %7 = zext nneg i32 %.05 to i64
  %gep = getelementptr %struct.lookahead_action, ptr %invariant.gep, i64 %7
  %8 = load i32, ptr %gep, align 4, !tbaa !12
  %9 = icmp slt i32 %8, 0
  br i1 %9, label %10, label %.critedge

10:                                               ; preds = %6
  %11 = add nsw i32 %.05, -1
  %12 = icmp sgt i32 %.05, 1
  br i1 %12, label %6, label %.critedge, !llvm.loop !14

.critedge:                                        ; preds = %6, %10, %1
  %.0.lcssa = phi i32 [ %2, %1 ], [ 0, %10 ], [ %.05, %6 ]
  ret i32 %.0.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, !7, i64 0}
!6 = !{!"acttab", !7, i64 0, !7, i64 4, !10, i64 8, !10, i64 16, !7, i64 24, !7, i64 28, !7, i64 32, !7, i64 36, !7, i64 40, !7, i64 44, !7, i64 48}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"any pointer", !8, i64 0}
!11 = !{!6, !10, i64 8}
!12 = !{!13, !7, i64 0}
!13 = !{!"lookahead_action", !7, i64 0, !7, i64 4}
!14 = distinct !{!14, !15}
!15 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LCSSAPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass