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

; 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.mbedtls_chachapoly_context = type { %struct.mbedtls_chacha20_context, %struct.mbedtls_poly1305_context, i64, i64, i32, i32 }
%struct.mbedtls_chacha20_context = type { [16 x i32], [64 x i8], i64 }
%struct.mbedtls_poly1305_context = type { [4 x i32], [4 x i32], [5 x i32], [16 x i8], i64 }

; Function Attrs: nounwind uwtable
define dso_local void @mbedtls_chachapoly_free(ptr noundef %0) #0 {
  %2 = alloca ptr, align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  %3 = load ptr, ptr %2, align 8, !tbaa !5
  %4 = icmp eq ptr %3, null
  br i1 %4, label %5, label %6

5:                                                ; preds = %1
  br label %19

6:                                                ; preds = %1
  %7 = load ptr, ptr %2, align 8, !tbaa !5
  %8 = getelementptr inbounds %struct.mbedtls_chachapoly_context, ptr %7, i32 0, i32 0
  call void @mbedtls_chacha20_free(ptr noundef %8)
  %9 = load ptr, ptr %2, align 8, !tbaa !5
  %10 = getelementptr inbounds %struct.mbedtls_chachapoly_context, ptr %9, i32 0, i32 1
  call void @mbedtls_poly1305_free(ptr noundef %10)
  %11 = load ptr, ptr %2, align 8, !tbaa !5
  %12 = getelementptr inbounds %struct.mbedtls_chachapoly_context, ptr %11, i32 0, i32 2
  store i64 0, ptr %12, align 8, !tbaa !9
  %13 = load ptr, ptr %2, align 8, !tbaa !5
  %14 = getelementptr inbounds %struct.mbedtls_chachapoly_context, ptr %13, i32 0, i32 3
  store i64 0, ptr %14, align 8, !tbaa !15
  %15 = load ptr, ptr %2, align 8, !tbaa !5
  %16 = getelementptr inbounds %struct.mbedtls_chachapoly_context, ptr %15, i32 0, i32 4
  store i32 0, ptr %16, align 8, !tbaa !16
  %17 = load ptr, ptr %2, align 8, !tbaa !5
  %18 = getelementptr inbounds %struct.mbedtls_chachapoly_context, ptr %17, i32 0, i32 5
  store i32 0, ptr %18, align 4, !tbaa !17
  br label %19

19:                                               ; preds = %6, %5
  ret void
}

declare void @mbedtls_chacha20_free(ptr noundef) #1

declare void @mbedtls_poly1305_free(ptr noundef) #1

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" }
attributes #1 = { "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, !12, i64 216}
!10 = !{!"mbedtls_chachapoly_context", !11, i64 0, !13, i64 136, !12, i64 216, !12, i64 224, !14, i64 232, !14, i64 236}
!11 = !{!"mbedtls_chacha20_context", !7, i64 0, !7, i64 64, !12, i64 128}
!12 = !{!"long", !7, i64 0}
!13 = !{!"mbedtls_poly1305_context", !7, i64 0, !7, i64 16, !7, i64 32, !7, i64 52, !12, i64 72}
!14 = !{!"int", !7, i64 0}
!15 = !{!10, !12, i64 224}
!16 = !{!10, !14, i64 232}
!17 = !{!10, !14, i64 236}


; 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 void @mbedtls_chachapoly_free(ptr noundef %0) local_unnamed_addr #0 {
  %2 = icmp eq ptr %0, null
  br i1 %2, label %6, label %3

3:                                                ; preds = %1
  tail call void @mbedtls_chacha20_free(ptr noundef nonnull %0) #3
  %4 = getelementptr inbounds i8, ptr %0, i64 136
  tail call void @mbedtls_poly1305_free(ptr noundef nonnull %4) #3
  %5 = getelementptr inbounds i8, ptr %0, i64 216
  tail call void @llvm.memset.p0.i64(ptr noundef nonnull align 8 dereferenceable(24) %5, i8 0, i64 24, i1 false)
  br label %6

6:                                                ; preds = %1, %3
  ret void
}

declare void @mbedtls_chacha20_free(ptr noundef) local_unnamed_addr #1

declare void @mbedtls_poly1305_free(ptr noundef) local_unnamed_addr #1

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #2

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" }
attributes #1 = { "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 = { nocallback nofree nounwind willreturn memory(argmem: write) }
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)"}


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