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

; 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.SM3_HMAC_CTX = type { %struct.SM3_CTX, [64 x i8] }
%struct.SM3_CTX = type { [8 x i32], i64, [64 x i8], i64 }

; 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 nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #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 @sm3_hkdf_extract(ptr noundef %0, i64 noundef %1, ptr noundef %2, i64 noundef %3, ptr noundef %4) #2 {
  %6 = alloca ptr, align 8
  %7 = alloca i64, align 8
  %8 = alloca ptr, align 8
  %9 = alloca i64, align 8
  %10 = alloca ptr, align 8
  %11 = alloca %struct.SM3_HMAC_CTX, align 8
  %12 = alloca [32 x i8], align 16
  store ptr %0, ptr %6, align 8, !tbaa !5
  store i64 %1, ptr %7, align 8, !tbaa !9
  store ptr %2, ptr %8, align 8, !tbaa !5
  store i64 %3, ptr %9, align 8, !tbaa !9
  store ptr %4, ptr %10, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 176, ptr %11) #4
  %13 = load ptr, ptr %6, align 8, !tbaa !5
  %14 = icmp ne ptr %13, null
  br i1 %14, label %15, label %18

15:                                               ; preds = %5
  %16 = load i64, ptr %7, align 8, !tbaa !9
  %17 = icmp eq i64 %16, 0
  br i1 %17, label %18, label %20

18:                                               ; preds = %15, %5
  call void @llvm.lifetime.start.p0(i64 32, ptr %12) #4
  call void @llvm.memset.p0.i64(ptr align 16 %12, i8 0, i64 32, i1 false)
  %19 = getelementptr inbounds [32 x i8], ptr %12, i64 0, i64 0
  call void @sm3_hmac_init(ptr noundef %11, ptr noundef %19, i64 noundef 32)
  call void @llvm.lifetime.end.p0(i64 32, ptr %12) #4
  br label %23

20:                                               ; preds = %15
  %21 = load ptr, ptr %6, align 8, !tbaa !5
  %22 = load i64, ptr %7, align 8, !tbaa !9
  call void @sm3_hmac_init(ptr noundef %11, ptr noundef %21, i64 noundef %22)
  br label %23

23:                                               ; preds = %20, %18
  %24 = load ptr, ptr %8, align 8, !tbaa !5
  %25 = load i64, ptr %9, align 8, !tbaa !9
  call void @sm3_hmac_update(ptr noundef %11, ptr noundef %24, i64 noundef %25)
  %26 = load ptr, ptr %10, align 8, !tbaa !5
  call void @sm3_hmac_finish(ptr noundef %11, ptr noundef %26)
  call void @llvm.lifetime.end.p0(i64 176, ptr %11) #4
  ret i32 1
}

declare void @sm3_hmac_init(ptr noundef, ptr noundef, i64 noundef) #3

declare void @sm3_hmac_update(ptr noundef, ptr noundef, i64 noundef) #3

declare void @sm3_hmac_finish(ptr noundef, ptr noundef) #3

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nocallback nofree nounwind willreturn memory(argmem: write) }
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 = { "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 #4 = { 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 = !{!"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"

%struct.SM3_HMAC_CTX = type { %struct.SM3_CTX, [64 x i8] }
%struct.SM3_CTX = type { [8 x i32], i64, [64 x i8], i64 }

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

; Function Attrs: mustprogress nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #1

; Function Attrs: mustprogress 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 noundef i32 @sm3_hkdf_extract(ptr noundef %0, i64 noundef %1, ptr noundef %2, i64 noundef %3, ptr noundef %4) local_unnamed_addr #2 {
  %6 = alloca %struct.SM3_HMAC_CTX, align 8
  %7 = alloca [32 x i8], align 16
  call void @llvm.lifetime.start.p0(i64 176, ptr nonnull %6) #4
  %8 = icmp eq ptr %0, null
  %9 = icmp eq i64 %1, 0
  %or.cond = or i1 %8, %9
  br i1 %or.cond, label %10, label %11

10:                                               ; preds = %5
  call void @llvm.lifetime.start.p0(i64 32, ptr nonnull %7) #4
  call void @llvm.memset.p0.i64(ptr noundef nonnull align 16 dereferenceable(32) %7, i8 0, i64 32, i1 false)
  call void @sm3_hmac_init(ptr noundef nonnull %6, ptr noundef nonnull %7, i64 noundef 32) #4
  call void @llvm.lifetime.end.p0(i64 32, ptr nonnull %7) #4
  br label %12

11:                                               ; preds = %5
  call void @sm3_hmac_init(ptr noundef nonnull %6, ptr noundef nonnull %0, i64 noundef %1) #4
  br label %12

12:                                               ; preds = %11, %10
  call void @sm3_hmac_update(ptr noundef nonnull %6, ptr noundef %2, i64 noundef %3) #4
  call void @sm3_hmac_finish(ptr noundef nonnull %6, ptr noundef %4) #4
  call void @llvm.lifetime.end.p0(i64 176, ptr nonnull %6) #4
  ret i32 1
}

declare void @sm3_hmac_init(ptr noundef, ptr noundef, i64 noundef) local_unnamed_addr #3

declare void @sm3_hmac_update(ptr noundef, ptr noundef, i64 noundef) local_unnamed_addr #3

declare void @sm3_hmac_finish(ptr noundef, ptr noundef) local_unnamed_addr #3

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { mustprogress nocallback nofree nounwind willreturn memory(argmem: write) }
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 = { "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 #4 = { 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: CorrelatedValuePropagationPass,EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass