; LLVM IR from guanzhi/GmSSL :: src (sm4_cbc_mac)

; 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.SM4_CBC_MAC_CTX = type { %struct.SM4_KEY, [16 x i8], i64 }
%struct.SM4_KEY = type { [32 x i32] }

declare void @sm4_encrypt(ptr noundef, ptr noundef, ptr noundef) #0

; Function Attrs: nounwind uwtable
define dso_local void @sm4_cbc_mac_finish(ptr noundef %0, ptr noundef %1) #1 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  store ptr %0, ptr %3, align 8, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !5
  %5 = load ptr, ptr %3, align 8, !tbaa !5
  %6 = getelementptr inbounds %struct.SM4_CBC_MAC_CTX, ptr %5, i32 0, i32 2
  %7 = load i64, ptr %6, align 8, !tbaa !9
  %8 = icmp ne i64 %7, 0
  br i1 %8, label %9, label %18

9:                                                ; preds = %2
  %10 = load ptr, ptr %3, align 8, !tbaa !5
  %11 = getelementptr inbounds %struct.SM4_CBC_MAC_CTX, ptr %10, i32 0, i32 0
  %12 = load ptr, ptr %3, align 8, !tbaa !5
  %13 = getelementptr inbounds %struct.SM4_CBC_MAC_CTX, ptr %12, i32 0, i32 1
  %14 = getelementptr inbounds [16 x i8], ptr %13, i64 0, i64 0
  %15 = load ptr, ptr %3, align 8, !tbaa !5
  %16 = getelementptr inbounds %struct.SM4_CBC_MAC_CTX, ptr %15, i32 0, i32 1
  %17 = getelementptr inbounds [16 x i8], ptr %16, i64 0, i64 0
  call void @sm4_encrypt(ptr noundef %11, ptr noundef %14, ptr noundef %17)
  br label %18

18:                                               ; preds = %9, %2
  %19 = load ptr, ptr %4, align 8, !tbaa !5
  %20 = load ptr, ptr %3, align 8, !tbaa !5
  %21 = getelementptr inbounds %struct.SM4_CBC_MAC_CTX, ptr %20, i32 0, i32 1
  %22 = getelementptr inbounds [16 x i8], ptr %21, i64 0, i64 0
  call void @llvm.memcpy.p0.p0.i64(ptr align 1 %19, ptr align 8 %22, i64 16, i1 false)
  ret void
}

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #2

attributes #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" }
attributes #2 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }

!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 144}
!10 = !{!"", !11, i64 0, !7, i64 128, !12, i64 144}
!11 = !{!"", !7, i64 0}
!12 = !{!"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"

declare void @sm4_encrypt(ptr noundef, ptr noundef, ptr noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local void @sm4_cbc_mac_finish(ptr noundef %0, ptr nocapture noundef writeonly %1) local_unnamed_addr #1 {
  %3 = getelementptr inbounds i8, ptr %0, i64 144
  %4 = load i64, ptr %3, align 8, !tbaa !5
  %.not = icmp eq i64 %4, 0
  br i1 %.not, label %7, label %5

5:                                                ; preds = %2
  %6 = getelementptr inbounds i8, ptr %0, i64 128
  tail call void @sm4_encrypt(ptr noundef nonnull %0, ptr noundef nonnull %6, ptr noundef nonnull %6) #3
  br label %7

7:                                                ; preds = %5, %2
  %8 = getelementptr inbounds i8, ptr %0, i64 128
  tail call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 1 dereferenceable(16) %1, ptr noundef nonnull align 8 dereferenceable(16) %8, i64 16, i1 false)
  ret void
}

; Function Attrs: mustprogress nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #2

attributes #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" }
attributes #2 = { mustprogress nocallback nofree nounwind willreturn memory(argmem: readwrite) }
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, !10, i64 144}
!6 = !{!"", !7, i64 0, !8, i64 128, !10, i64 144}
!7 = !{!"", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"long", !8, i64 0}


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