; LLVM IR from Seeed-Studio/Seeed_Arduino_edgeimpulse :: src/QCBOR/src (qcbor_decode)

; 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._QCBORDecodeContext = type { %struct.useful_input_buf, i8, i8, %struct.__QCBORDecodeNesting, %struct.QCORInternalAllocator, i32, i32, ptr }
%struct.useful_input_buf = type { %struct.q_useful_buf_c, i64, i16, i8 }
%struct.q_useful_buf_c = type { ptr, i64 }
%struct.__QCBORDecodeNesting = type { [16 x %struct.anon], ptr }
%struct.anon = type { i16, i8 }
%struct.QCORInternalAllocator = type { ptr, ptr }

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: inlinehint nounwind uwtable
declare hidden i32 @DecodeNesting_IsNested(ptr noundef) #1

; Function Attrs: inlinehint nounwind uwtable
declare hidden i64 @UsefulInputBuf_BytesUnconsumed(ptr noundef) #1

; 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 @QCBORDecode_Finish(ptr noundef %0) #2 {
  %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) #3
  store i32 0, ptr %3, align 4, !tbaa !9
  %4 = load ptr, ptr %2, align 8, !tbaa !5
  %5 = getelementptr inbounds %struct._QCBORDecodeContext, ptr %4, i32 0, i32 3
  %6 = call i32 @DecodeNesting_IsNested(ptr noundef %5)
  %7 = icmp ne i32 %6, 0
  br i1 %7, label %8, label %9

8:                                                ; preds = %1
  store i32 10, ptr %3, align 4, !tbaa !9
  br label %16

9:                                                ; preds = %1
  %10 = load ptr, ptr %2, align 8, !tbaa !5
  %11 = getelementptr inbounds %struct._QCBORDecodeContext, ptr %10, i32 0, i32 0
  %12 = call i64 @UsefulInputBuf_BytesUnconsumed(ptr noundef %11)
  %13 = icmp ne i64 %12, 0
  br i1 %13, label %14, label %15

14:                                               ; preds = %9
  store i32 14, ptr %3, align 4, !tbaa !9
  br label %15

15:                                               ; preds = %14, %9
  br label %16

16:                                               ; preds = %15, %8
  %17 = load ptr, ptr %2, align 8, !tbaa !5
  %18 = getelementptr inbounds %struct._QCBORDecodeContext, ptr %17, i32 0, i32 4
  call void @StringAllocator_Destruct(ptr noundef %18)
  %19 = load i32, ptr %3, align 4, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #3
  ret i32 %19
}

; Function Attrs: inlinehint nounwind uwtable
declare hidden void @StringAllocator_Destruct(ptr noundef) #1

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { inlinehint 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 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 = !{!"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"

; Function Attrs: inlinehint nounwind uwtable
declare hidden i32 @DecodeNesting_IsNested(ptr noundef) local_unnamed_addr #0

; Function Attrs: inlinehint nounwind uwtable
declare hidden i64 @UsefulInputBuf_BytesUnconsumed(ptr noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local range(i32 0, 15) i32 @QCBORDecode_Finish(ptr noundef %0) local_unnamed_addr #1 {
  %2 = getelementptr inbounds i8, ptr %0, i64 40
  %3 = tail call i32 @DecodeNesting_IsNested(ptr noundef nonnull %2)
  %.not = icmp eq i32 %3, 0
  br i1 %.not, label %4, label %6

4:                                                ; preds = %1
  %5 = tail call i64 @UsefulInputBuf_BytesUnconsumed(ptr noundef %0)
  %.not3 = icmp eq i64 %5, 0
  %spec.select = select i1 %.not3, i32 0, i32 14
  br label %6

6:                                                ; preds = %4, %1
  %.0 = phi i32 [ 10, %1 ], [ %spec.select, %4 ]
  %7 = getelementptr inbounds i8, ptr %0, i64 112
  tail call void @StringAllocator_Destruct(ptr noundef nonnull %7)
  ret i32 %.0
}

; Function Attrs: inlinehint nounwind uwtable
declare hidden void @StringAllocator_Destruct(ptr noundef) local_unnamed_addr #0

attributes #0 = { inlinehint 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 #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)"}


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