; LLVM IR from DanEngelbrecht/longtail :: lib/lz4/ext (lz4frame)

; 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.LZ4F_CustomMem = type { ptr, ptr, ptr, ptr }
%struct.LZ4F_dctx_s = type { %struct.LZ4F_CustomMem, %struct.LZ4F_frameInfo_t, i32, i32, i64, i64, i64, ptr, i64, i64, ptr, ptr, i64, ptr, i64, i64, %struct.XXH32_state_s, %struct.XXH32_state_s, i32, [19 x i8] }
%struct.LZ4F_frameInfo_t = type { i32, i32, i32, i32, i64, i32, i32 }
%struct.XXH32_state_s = type { i32, i32, i32, i32, i32, i32, [4 x i32], 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: nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #1

; Function Attrs: nounwind uwtable
declare hidden ptr @LZ4F_calloc(i64 noundef, ptr noundef byval(%struct.LZ4F_CustomMem) align 8) #2

; Function Attrs: nounwind uwtable
define dso_local ptr @LZ4F_createDecompressionContext_advanced(ptr noundef byval(%struct.LZ4F_CustomMem) align 8 %0, i32 noundef %1) #2 {
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  store i32 %1, ptr %4, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #3
  %7 = call ptr @LZ4F_calloc(i64 noundef 288, ptr noundef byval(%struct.LZ4F_CustomMem) align 8 %0)
  store ptr %7, ptr %5, align 8, !tbaa !9
  %8 = load ptr, ptr %5, align 8, !tbaa !9
  %9 = icmp eq ptr %8, null
  br i1 %9, label %10, label %11

10:                                               ; preds = %2
  store ptr null, ptr %3, align 8
  store i32 1, ptr %6, align 4
  br label %18

11:                                               ; preds = %2
  %12 = load ptr, ptr %5, align 8, !tbaa !9
  %13 = getelementptr inbounds %struct.LZ4F_dctx_s, ptr %12, i32 0, i32 0
  call void @llvm.memcpy.p0.p0.i64(ptr align 8 %13, ptr align 8 %0, i64 32, i1 false), !tbaa.struct !11
  %14 = load i32, ptr %4, align 4, !tbaa !5
  %15 = load ptr, ptr %5, align 8, !tbaa !9
  %16 = getelementptr inbounds %struct.LZ4F_dctx_s, ptr %15, i32 0, i32 2
  store i32 %14, ptr %16, align 8, !tbaa !12
  %17 = load ptr, ptr %5, align 8, !tbaa !9
  store ptr %17, ptr %3, align 8
  store i32 1, ptr %6, align 4
  br label %18

18:                                               ; preds = %11, %10
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #3
  %19 = load ptr, ptr %3, align 8
  ret ptr %19
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { 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 #3 = { 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, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = !{i64 0, i64 8, !9, i64 8, i64 8, !9, i64 16, i64 8, !9, i64 24, i64 8, !9}
!12 = !{!13, !6, i64 64}
!13 = !{!"LZ4F_dctx_s", !14, i64 0, !15, i64 32, !6, i64 64, !6, i64 68, !17, i64 72, !17, i64 80, !17, i64 88, !10, i64 96, !17, i64 104, !17, i64 112, !10, i64 120, !10, i64 128, !17, i64 136, !10, i64 144, !17, i64 152, !17, i64 160, !18, i64 168, !18, i64 216, !6, i64 264, !7, i64 268}
!14 = !{!"", !10, i64 0, !10, i64 8, !10, i64 16, !10, i64 24}
!15 = !{!"", !6, i64 0, !6, i64 4, !6, i64 8, !6, i64 12, !16, i64 16, !6, i64 24, !6, i64 28}
!16 = !{!"long long", !7, i64 0}
!17 = !{!"long", !7, i64 0}
!18 = !{!"XXH32_state_s", !6, i64 0, !6, i64 4, !6, i64 8, !6, i64 12, !6, i64 16, !6, i64 20, !7, i64 24, !6, i64 40, !6, i64 44}


; 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.LZ4F_CustomMem = type { ptr, ptr, ptr, ptr }

; Function Attrs: mustprogress nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #0

; Function Attrs: nounwind uwtable
declare hidden ptr @LZ4F_calloc(i64 noundef, ptr noundef byval(%struct.LZ4F_CustomMem) align 8) local_unnamed_addr #1

; Function Attrs: nounwind uwtable
define dso_local ptr @LZ4F_createDecompressionContext_advanced(ptr noundef byval(%struct.LZ4F_CustomMem) align 8 %0, i32 noundef %1) local_unnamed_addr #1 {
  %3 = tail call ptr @LZ4F_calloc(i64 noundef 288, ptr noundef nonnull byval(%struct.LZ4F_CustomMem) align 8 %0)
  %4 = icmp eq ptr %3, null
  br i1 %4, label %7, label %5

5:                                                ; preds = %2
  call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 8 dereferenceable(32) %3, ptr noundef nonnull align 8 dereferenceable(32) %0, i64 32, i1 false), !tbaa.struct !5
  %6 = getelementptr inbounds i8, ptr %3, i64 64
  store i32 %1, ptr %6, align 8, !tbaa !10
  br label %7

7:                                                ; preds = %2, %5
  ret ptr %3
}

attributes #0 = { mustprogress nocallback nofree 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" }

!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 = !{i64 0, i64 8, !6, i64 8, i64 8, !6, i64 16, i64 8, !6, i64 24, i64 8, !6}
!6 = !{!7, !7, i64 0}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!11, !14, i64 64}
!11 = !{!"LZ4F_dctx_s", !12, i64 0, !13, i64 32, !14, i64 64, !14, i64 68, !16, i64 72, !16, i64 80, !16, i64 88, !7, i64 96, !16, i64 104, !16, i64 112, !7, i64 120, !7, i64 128, !16, i64 136, !7, i64 144, !16, i64 152, !16, i64 160, !17, i64 168, !17, i64 216, !14, i64 264, !8, i64 268}
!12 = !{!"", !7, i64 0, !7, i64 8, !7, i64 16, !7, i64 24}
!13 = !{!"", !14, i64 0, !14, i64 4, !14, i64 8, !14, i64 12, !15, i64 16, !14, i64 24, !14, i64 28}
!14 = !{!"int", !8, i64 0}
!15 = !{!"long long", !8, i64 0}
!16 = !{!"long", !8, i64 0}
!17 = !{!"XXH32_state_s", !14, i64 0, !14, i64 4, !14, i64 8, !14, i64 12, !14, i64 16, !14, i64 20, !8, i64 24, !14, i64 40, !14, i64 44}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,SROAPass,SimplifyCFGPass,TailCallElimPass