; 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 }

@LZ4F_defaultCMem = external hidden constant %struct.LZ4F_CustomMem, align 8

; Function Attrs: nounwind uwtable
declare hidden i64 @LZ4F_returnErrorCode(i32 noundef) #0

; Function Attrs: nounwind uwtable
declare dso_local ptr @LZ4F_createDecompressionContext_advanced(ptr noundef byval(%struct.LZ4F_CustomMem) align 8, i32 noundef) #0

; Function Attrs: nounwind uwtable
define dso_local i64 @LZ4F_createDecompressionContext(ptr noundef %0, i32 noundef %1) #0 {
  %3 = alloca i64, align 8
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !9
  br label %6

6:                                                ; preds = %2
  %7 = load ptr, ptr %4, align 8, !tbaa !5
  %8 = icmp eq ptr %7, null
  br i1 %8, label %9, label %11

9:                                                ; preds = %6
  %10 = call i64 @LZ4F_returnErrorCode(i32 noundef 21)
  store i64 %10, ptr %3, align 8
  br label %22

11:                                               ; preds = %6
  br label %12

12:                                               ; preds = %11
  %13 = load i32, ptr %5, align 4, !tbaa !9
  %14 = call ptr @LZ4F_createDecompressionContext_advanced(ptr noundef byval(%struct.LZ4F_CustomMem) align 8 @LZ4F_defaultCMem, i32 noundef %13)
  %15 = load ptr, ptr %4, align 8, !tbaa !5
  store ptr %14, ptr %15, align 8, !tbaa !5
  %16 = load ptr, ptr %4, align 8, !tbaa !5
  %17 = load ptr, ptr %16, align 8, !tbaa !5
  %18 = icmp eq ptr %17, null
  br i1 %18, label %19, label %21

19:                                               ; preds = %12
  %20 = call i64 @LZ4F_returnErrorCode(i32 noundef 9)
  store i64 %20, ptr %3, align 8
  br label %22

21:                                               ; preds = %12
  store i64 0, ptr %3, align 8
  br label %22

22:                                               ; preds = %21, %19, %9
  %23 = load i64, ptr %3, align 8
  ret i64 %23
}

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, !10, i64 0}
!10 = !{!"int", !7, i64 0}


; 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 }

@LZ4F_defaultCMem = external hidden constant %struct.LZ4F_CustomMem, align 8

; Function Attrs: nounwind uwtable
declare hidden i64 @LZ4F_returnErrorCode(i32 noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
declare dso_local ptr @LZ4F_createDecompressionContext_advanced(ptr noundef byval(%struct.LZ4F_CustomMem) align 8, i32 noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local i64 @LZ4F_createDecompressionContext(ptr noundef writeonly %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = icmp eq ptr %0, null
  br i1 %3, label %.sink.split, label %4

4:                                                ; preds = %2
  %5 = tail call ptr @LZ4F_createDecompressionContext_advanced(ptr noundef nonnull byval(%struct.LZ4F_CustomMem) align 8 @LZ4F_defaultCMem, i32 noundef %1)
  store ptr %5, ptr %0, align 8, !tbaa !5
  %6 = icmp eq ptr %5, null
  br i1 %6, label %.sink.split, label %8

.sink.split:                                      ; preds = %4, %2
  %.sink = phi i32 [ 21, %2 ], [ 9, %4 ]
  %7 = tail call i64 @LZ4F_returnErrorCode(i32 noundef %.sink)
  br label %8

8:                                                ; preds = %.sink.split, %4
  %.0 = phi i64 [ 0, %4 ], [ %7, %.sink.split ]
  ret i64 %.0
}

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"}


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