; LLVM IR from ARMmbed/mbed-crypto :: library (oid)

; 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.oid_sig_alg_t = type { %struct.mbedtls_oid_descriptor_t, i32, i32 }
%struct.mbedtls_oid_descriptor_t = type { ptr, i64, 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: 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 @mbedtls_oid_get_sig_alg_desc(ptr noundef %0, ptr noundef %1) #1 {
  %3 = alloca i32, align 4
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #2
  %8 = load ptr, ptr %4, align 8, !tbaa !5
  %9 = call ptr @oid_sig_alg_from_asn1(ptr noundef %8)
  store ptr %9, ptr %6, align 8, !tbaa !5
  %10 = load ptr, ptr %6, align 8, !tbaa !5
  %11 = icmp eq ptr %10, null
  br i1 %11, label %12, label %13

12:                                               ; preds = %2
  store i32 -46, ptr %3, align 4
  store i32 1, ptr %7, align 4
  br label %19

13:                                               ; preds = %2
  %14 = load ptr, ptr %6, align 8, !tbaa !5
  %15 = getelementptr inbounds %struct.oid_sig_alg_t, ptr %14, i32 0, i32 0
  %16 = getelementptr inbounds %struct.mbedtls_oid_descriptor_t, ptr %15, i32 0, i32 3
  %17 = load ptr, ptr %16, align 8, !tbaa !9
  %18 = load ptr, ptr %5, align 8, !tbaa !5
  store ptr %17, ptr %18, align 8, !tbaa !5
  store i32 0, ptr %3, align 4
  store i32 1, ptr %7, align 4
  br label %19

19:                                               ; preds = %13, %12
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #2
  %20 = load i32, ptr %3, align 4
  ret i32 %20
}

; Function Attrs: nounwind uwtable
declare hidden ptr @oid_sig_alg_from_asn1(ptr noundef) #1

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, !6, i64 24}
!10 = !{!"", !11, i64 0, !13, i64 32, !13, i64 36}
!11 = !{!"mbedtls_oid_descriptor_t", !6, i64 0, !12, i64 8, !6, i64 16, !6, i64 24}
!12 = !{!"long", !7, i64 0}
!13 = !{!"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: nounwind uwtable
define dso_local range(i32 -46, 1) i32 @mbedtls_oid_get_sig_alg_desc(ptr noundef %0, ptr nocapture noundef writeonly %1) local_unnamed_addr #0 {
  %3 = tail call ptr @oid_sig_alg_from_asn1(ptr noundef %0)
  %4 = icmp eq ptr %3, null
  br i1 %4, label %8, label %5

5:                                                ; preds = %2
  %6 = getelementptr inbounds i8, ptr %3, i64 24
  %7 = load ptr, ptr %6, align 8, !tbaa !5
  store ptr %7, ptr %1, align 8, !tbaa !13
  br label %8

8:                                                ; preds = %2, %5
  %.0 = phi i32 [ 0, %5 ], [ -46, %2 ]
  ret i32 %.0
}

; Function Attrs: nounwind uwtable
declare hidden ptr @oid_sig_alg_from_asn1(ptr noundef) local_unnamed_addr #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, !8, i64 24}
!6 = !{!"", !7, i64 0, !12, i64 32, !12, i64 36}
!7 = !{!"mbedtls_oid_descriptor_t", !8, i64 0, !11, i64 8, !8, i64 16, !8, i64 24}
!8 = !{!"any pointer", !9, i64 0}
!9 = !{!"omnipotent char", !10, i64 0}
!10 = !{!"Simple C/C++ TBAA"}
!11 = !{!"long", !9, i64 0}
!12 = !{!"int", !9, i64 0}
!13 = !{!8, !8, i64 0}


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