; LLVM IR from catid/Zpng :: zstd (zstd_decompress)

; 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.ZSTD_DCtx_s = type { ptr, ptr, ptr, ptr, %struct.ZSTD_entropyDTables_t, ptr, ptr, ptr, ptr, i64, %struct.ZSTD_frameHeader, i64, i32, i32, i32, i32, %struct.XXH64_state_s, i64, i32, i32, ptr, %struct.ZSTD_customMem, i64, i64, i64, i32, ptr, ptr, i32, ptr, i64, i64, i64, ptr, i64, i64, i64, i64, ptr, i32, i32, i32, [131080 x i8], [18 x i8] }
%struct.ZSTD_entropyDTables_t = type { [513 x %struct.ZSTD_seqSymbol], [257 x %struct.ZSTD_seqSymbol], [513 x %struct.ZSTD_seqSymbol], [4097 x i32], [512 x i32], [3 x i32] }
%struct.ZSTD_seqSymbol = type { i16, i8, i8, i32 }
%struct.ZSTD_frameHeader = type { i64, i64, i32, i32, i32, i32, i32 }
%struct.XXH64_state_s = type { i64, i64, i64, i64, i64, [4 x i64], i32, [2 x i32] }
%struct.ZSTD_customMem = type { ptr, ptr, ptr }

; Function Attrs: nounwind uwtable
define dso_local i32 @ZSTD_nextInputType(ptr noundef %0) #0 {
  %2 = alloca i32, align 4
  %3 = alloca ptr, align 8
  store ptr %0, ptr %3, align 8, !tbaa !5
  %4 = load ptr, ptr %3, align 8, !tbaa !5
  %5 = getelementptr inbounds %struct.ZSTD_DCtx_s, ptr %4, i32 0, i32 13
  %6 = load i32, ptr %5, align 4, !tbaa !9
  switch i32 %6, label %7 [
    i32 0, label %8
    i32 1, label %8
    i32 2, label %9
    i32 3, label %10
    i32 4, label %11
    i32 5, label %12
    i32 6, label %13
    i32 7, label %13
  ]

7:                                                ; preds = %1
  br label %8

8:                                                ; preds = %7, %1, %1
  store i32 0, ptr %2, align 4
  br label %14

9:                                                ; preds = %1
  store i32 1, ptr %2, align 4
  br label %14

10:                                               ; preds = %1
  store i32 2, ptr %2, align 4
  br label %14

11:                                               ; preds = %1
  store i32 3, ptr %2, align 4
  br label %14

12:                                               ; preds = %1
  store i32 4, ptr %2, align 4
  br label %14

13:                                               ; preds = %1, %1
  store i32 5, ptr %2, align 4
  br label %14

14:                                               ; preds = %13, %12, %11, %10, %9, %8
  %15 = load i32, ptr %2, align 4
  ret i32 %15
}

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" }

!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, !15, i64 28836}
!10 = !{!"ZSTD_DCtx_s", !6, i64 0, !6, i64 8, !6, i64 16, !6, i64 24, !11, i64 32, !6, i64 28744, !6, i64 28752, !6, i64 28760, !6, i64 28768, !12, i64 28776, !13, i64 28784, !12, i64 28824, !15, i64 28832, !15, i64 28836, !15, i64 28840, !15, i64 28844, !16, i64 28848, !12, i64 28936, !15, i64 28944, !15, i64 28948, !6, i64 28952, !17, i64 28960, !12, i64 28984, !12, i64 28992, !12, i64 29000, !15, i64 29008, !6, i64 29016, !6, i64 29024, !15, i64 29032, !6, i64 29040, !12, i64 29048, !12, i64 29056, !12, i64 29064, !6, i64 29072, !12, i64 29080, !12, i64 29088, !12, i64 29096, !12, i64 29104, !6, i64 29112, !15, i64 29120, !15, i64 29124, !15, i64 29128, !7, i64 29132, !7, i64 160212}
!11 = !{!"", !7, i64 0, !7, i64 4104, !7, i64 6160, !7, i64 10264, !7, i64 26652, !7, i64 28700}
!12 = !{!"long", !7, i64 0}
!13 = !{!"", !14, i64 0, !14, i64 8, !15, i64 16, !15, i64 20, !15, i64 24, !15, i64 28, !15, i64 32}
!14 = !{!"long long", !7, i64 0}
!15 = !{!"int", !7, i64 0}
!16 = !{!"XXH64_state_s", !14, i64 0, !14, i64 8, !14, i64 16, !14, i64 24, !14, i64 32, !7, i64 40, !15, i64 72, !7, i64 76}
!17 = !{!"", !6, i64 0, !6, i64 8, !6, i64 16}


; 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"

@switch.table.ZSTD_nextInputType = private unnamed_addr constant [6 x i32] [i32 1, i32 2, i32 3, i32 4, i32 5, i32 5], align 4

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: read) uwtable
define dso_local range(i32 0, 6) i32 @ZSTD_nextInputType(ptr nocapture noundef readonly %0) local_unnamed_addr #0 {
  %2 = getelementptr inbounds i8, ptr %0, i64 28836
  %3 = load i32, ptr %2, align 4, !tbaa !5
  %switch.tableidx = add i32 %3, -2
  %4 = icmp ult i32 %switch.tableidx, 6
  br i1 %4, label %switch.lookup, label %6

switch.lookup:                                    ; preds = %1
  %5 = zext nneg i32 %switch.tableidx to i64
  %switch.gep = getelementptr inbounds [6 x i32], ptr @switch.table.ZSTD_nextInputType, i64 0, i64 %5
  %switch.load = load i32, ptr %switch.gep, align 4
  br label %6

6:                                                ; preds = %switch.lookup, %1
  %.0 = phi i32 [ 0, %1 ], [ %switch.load, %switch.lookup ]
  ret i32 %.0
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn 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, !14, i64 28836}
!6 = !{!"ZSTD_DCtx_s", !7, i64 0, !7, i64 8, !7, i64 16, !7, i64 24, !10, i64 32, !7, i64 28744, !7, i64 28752, !7, i64 28760, !7, i64 28768, !11, i64 28776, !12, i64 28784, !11, i64 28824, !14, i64 28832, !14, i64 28836, !14, i64 28840, !14, i64 28844, !15, i64 28848, !11, i64 28936, !14, i64 28944, !14, i64 28948, !7, i64 28952, !16, i64 28960, !11, i64 28984, !11, i64 28992, !11, i64 29000, !14, i64 29008, !7, i64 29016, !7, i64 29024, !14, i64 29032, !7, i64 29040, !11, i64 29048, !11, i64 29056, !11, i64 29064, !7, i64 29072, !11, i64 29080, !11, i64 29088, !11, i64 29096, !11, i64 29104, !7, i64 29112, !14, i64 29120, !14, i64 29124, !14, i64 29128, !8, i64 29132, !8, i64 160212}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"", !8, i64 0, !8, i64 4104, !8, i64 6160, !8, i64 10264, !8, i64 26652, !8, i64 28700}
!11 = !{!"long", !8, i64 0}
!12 = !{!"", !13, i64 0, !13, i64 8, !14, i64 16, !14, i64 20, !14, i64 24, !14, i64 28, !14, i64 32}
!13 = !{!"long long", !8, i64 0}
!14 = !{!"int", !8, i64 0}
!15 = !{!"XXH64_state_s", !13, i64 0, !13, i64 8, !13, i64 16, !13, i64 24, !13, i64 32, !8, i64 40, !14, i64 72, !8, i64 76}
!16 = !{!"", !7, i64 0, !7, i64 8, !7, i64 16}


; Effective O3 passes: GlobalOptPass,IPSCCPPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass