; LLVM IR from indygreg/python-zstandard :: zstd (zstd)

; 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_compressedBlockState_t = type { %struct.ZSTD_entropyCTables_t, [3 x i32] }
%struct.ZSTD_entropyCTables_t = type { %struct.ZSTD_hufCTables_t, %struct.ZSTD_fseCTables_t }
%struct.ZSTD_hufCTables_t = type { [257 x i64], i32 }
%struct.ZSTD_fseCTables_t = type { [193 x i32], [363 x i32], [329 x i32], i32, i32, i32 }

@repStartValue = external hidden constant [3 x i32], align 4

; 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 void @ZSTD_reset_compressedBlockState(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
  store i32 0, ptr %3, align 4, !tbaa !9
  br label %4

4:                                                ; preds = %17, %1
  %5 = load i32, ptr %3, align 4, !tbaa !9
  %6 = icmp slt i32 %5, 3
  br i1 %6, label %7, label %20

7:                                                ; preds = %4
  %8 = load i32, ptr %3, align 4, !tbaa !9
  %9 = sext i32 %8 to i64
  %10 = getelementptr inbounds [3 x i32], ptr @repStartValue, i64 0, i64 %9
  %11 = load i32, ptr %10, align 4, !tbaa !9
  %12 = load ptr, ptr %2, align 8, !tbaa !5
  %13 = getelementptr inbounds %struct.ZSTD_compressedBlockState_t, ptr %12, i32 0, i32 1
  %14 = load i32, ptr %3, align 4, !tbaa !9
  %15 = sext i32 %14 to i64
  %16 = getelementptr inbounds [3 x i32], ptr %13, i64 0, i64 %15
  store i32 %11, ptr %16, align 4, !tbaa !9
  br label %17

17:                                               ; preds = %7
  %18 = load i32, ptr %3, align 4, !tbaa !9
  %19 = add nsw i32 %18, 1
  store i32 %19, ptr %3, align 4, !tbaa !9
  br label %4, !llvm.loop !11

20:                                               ; preds = %4
  %21 = load ptr, ptr %2, align 8, !tbaa !5
  %22 = getelementptr inbounds %struct.ZSTD_compressedBlockState_t, ptr %21, i32 0, i32 0
  %23 = getelementptr inbounds %struct.ZSTD_entropyCTables_t, ptr %22, i32 0, i32 0
  %24 = getelementptr inbounds %struct.ZSTD_hufCTables_t, ptr %23, i32 0, i32 1
  store i32 0, ptr %24, align 8, !tbaa !13
  %25 = load ptr, ptr %2, align 8, !tbaa !5
  %26 = getelementptr inbounds %struct.ZSTD_compressedBlockState_t, ptr %25, i32 0, i32 0
  %27 = getelementptr inbounds %struct.ZSTD_entropyCTables_t, ptr %26, i32 0, i32 1
  %28 = getelementptr inbounds %struct.ZSTD_fseCTables_t, ptr %27, i32 0, i32 3
  store i32 0, ptr %28, align 4, !tbaa !18
  %29 = load ptr, ptr %2, align 8, !tbaa !5
  %30 = getelementptr inbounds %struct.ZSTD_compressedBlockState_t, ptr %29, i32 0, i32 0
  %31 = getelementptr inbounds %struct.ZSTD_entropyCTables_t, ptr %30, i32 0, i32 1
  %32 = getelementptr inbounds %struct.ZSTD_fseCTables_t, ptr %31, i32 0, i32 4
  store i32 0, ptr %32, align 8, !tbaa !19
  %33 = load ptr, ptr %2, align 8, !tbaa !5
  %34 = getelementptr inbounds %struct.ZSTD_compressedBlockState_t, ptr %33, i32 0, i32 0
  %35 = getelementptr inbounds %struct.ZSTD_entropyCTables_t, ptr %34, i32 0, i32 1
  %36 = getelementptr inbounds %struct.ZSTD_fseCTables_t, ptr %35, i32 0, i32 5
  store i32 0, ptr %36, align 4, !tbaa !20
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #2
  ret void
}

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, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = !{!14, !10, i64 2056}
!14 = !{!"", !15, i64 0, !7, i64 5616}
!15 = !{!"", !16, i64 0, !17, i64 2064}
!16 = !{!"", !7, i64 0, !10, i64 2056}
!17 = !{!"", !7, i64 0, !7, i64 772, !7, i64 2224, !10, i64 3540, !10, i64 3544, !10, i64 3548}
!18 = !{!14, !10, i64 5604}
!19 = !{!14, !10, i64 5608}
!20 = !{!14, !10, i64 5612}


; 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"

@repStartValue = external hidden local_unnamed_addr constant [3 x i32], align 4

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: write) uwtable
define dso_local void @ZSTD_reset_compressedBlockState(ptr nocapture noundef writeonly %0) local_unnamed_addr #0 {
  %2 = getelementptr inbounds i8, ptr %0, i64 5616
  %3 = load <2 x i32>, ptr @repStartValue, align 4, !tbaa !5
  store <2 x i32> %3, ptr %2, align 4, !tbaa !5
  %4 = load i32, ptr getelementptr inbounds (i8, ptr @repStartValue, i64 8), align 4, !tbaa !5
  %5 = getelementptr inbounds i8, ptr %0, i64 5624
  store i32 %4, ptr %5, align 4, !tbaa !5
  %6 = getelementptr inbounds i8, ptr %0, i64 2056
  store i32 0, ptr %6, align 8, !tbaa !9
  %7 = getelementptr inbounds i8, ptr %0, i64 5604
  store i32 0, ptr %7, align 4, !tbaa !14
  %8 = getelementptr inbounds i8, ptr %0, i64 5608
  store i32 0, ptr %8, align 8, !tbaa !15
  %9 = getelementptr inbounds i8, ptr %0, i64 5612
  store i32 0, ptr %9, align 4, !tbaa !16
  ret void
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: write) 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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !6, i64 2056}
!10 = !{!"", !11, i64 0, !7, i64 5616}
!11 = !{!"", !12, i64 0, !13, i64 2064}
!12 = !{!"", !7, i64 0, !6, i64 2056}
!13 = !{!"", !7, i64 0, !7, i64 772, !7, i64 2224, !6, i64 3540, !6, i64 3544, !6, i64 3548}
!14 = !{!10, !6, i64 5604}
!15 = !{!10, !6, i64 5608}
!16 = !{!10, !6, i64 5612}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,LICMPass,LoopRotatePass,PostOrderFunctionAttrsPass,SLPVectorizerPass,SROAPass,SimplifyCFGPass