; LLVM IR from golioth/golioth-firmware-sdk :: src (payload_utils)

; 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"

@.str.3 = external hidden unnamed_addr constant [5 x i8], align 1

; Function Attrs: nounwind willreturn memory(read)
declare i32 @strncmp(ptr noundef, ptr noundef, i64 noundef) #0

; Function Attrs: nounwind uwtable
define dso_local zeroext i1 @golioth_payload_is_null(ptr noundef %0, i64 noundef %1) #1 {
  %3 = alloca i1, align 1
  %4 = alloca ptr, align 8
  %5 = alloca i64, align 8
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i64 %1, ptr %5, align 8, !tbaa !9
  %6 = load ptr, ptr %4, align 8, !tbaa !5
  %7 = icmp ne ptr %6, null
  br i1 %7, label %8, label %11

8:                                                ; preds = %2
  %9 = load i64, ptr %5, align 8, !tbaa !9
  %10 = icmp eq i64 %9, 0
  br i1 %10, label %11, label %12

11:                                               ; preds = %8, %2
  store i1 true, ptr %3, align 1
  br label %22

12:                                               ; preds = %8
  %13 = load i64, ptr %5, align 8, !tbaa !9
  %14 = icmp uge i64 %13, 4
  br i1 %14, label %15, label %21

15:                                               ; preds = %12
  %16 = load ptr, ptr %4, align 8, !tbaa !5
  %17 = call i32 @strncmp(ptr noundef %16, ptr noundef @.str.3, i64 noundef 4) #2
  %18 = icmp eq i32 %17, 0
  br i1 %18, label %19, label %20

19:                                               ; preds = %15
  store i1 true, ptr %3, align 1
  br label %22

20:                                               ; preds = %15
  br label %21

21:                                               ; preds = %20, %12
  store i1 false, ptr %3, align 1
  br label %22

22:                                               ; preds = %21, %19, %11
  %23 = load i1, ptr %3, align 1
  ret i1 %23
}

attributes #0 = { nounwind willreturn memory(read) "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" }
attributes #2 = { nounwind willreturn memory(read) }

!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 = !{!"long", !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"

@.str.3 = external hidden unnamed_addr constant [5 x i8], align 1

; Function Attrs: mustprogress nofree nounwind willreturn memory(argmem: read)
declare i32 @strncmp(ptr nocapture noundef, ptr nocapture noundef, i64 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nofree nounwind willreturn memory(argmem: read) uwtable
define dso_local noundef zeroext i1 @golioth_payload_is_null(ptr noundef readonly %0, i64 noundef %1) local_unnamed_addr #1 {
  %3 = icmp eq ptr %0, null
  %4 = icmp eq i64 %1, 0
  %or.cond = or i1 %3, %4
  br i1 %or.cond, label %11, label %5

5:                                                ; preds = %2
  %6 = icmp ugt i64 %1, 3
  br i1 %6, label %7, label %10

7:                                                ; preds = %5
  %8 = tail call i32 @strncmp(ptr noundef nonnull dereferenceable(1) %0, ptr noundef nonnull dereferenceable(1) @.str.3, i64 noundef 4) #2
  %9 = icmp eq i32 %8, 0
  br i1 %9, label %11, label %10

10:                                               ; preds = %7, %5
  br label %11

11:                                               ; preds = %7, %2, %10
  %.0 = phi i1 [ false, %10 ], [ true, %2 ], [ true, %7 ]
  ret i1 %.0
}

attributes #0 = { mustprogress nofree nounwind willreturn memory(argmem: read) "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 = { mustprogress nofree 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" }
attributes #2 = { nounwind willreturn memory(read) }

!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: GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass