; LLVM IR from guanzhi/GmSSL :: src (gf128)

; 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"

; 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 void @gf128_mul_by_2(ptr noundef %0, ptr noundef %1) #1 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca i64, align 8
  store ptr %0, ptr %3, align 8, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #2
  store i64 -9223372036854775808, ptr %5, align 8, !tbaa !9
  %6 = load ptr, ptr %4, align 8, !tbaa !5
  %7 = getelementptr inbounds i64, ptr %6, i64 1
  %8 = load i64, ptr %7, align 8, !tbaa !9
  %9 = and i64 %8, -9223372036854775808
  %10 = icmp ne i64 %9, 0
  br i1 %10, label %11, label %33

11:                                               ; preds = %2
  %12 = load ptr, ptr %4, align 8, !tbaa !5
  %13 = getelementptr inbounds i64, ptr %12, i64 1
  %14 = load i64, ptr %13, align 8, !tbaa !9
  %15 = shl i64 %14, 1
  %16 = load ptr, ptr %4, align 8, !tbaa !5
  %17 = getelementptr inbounds i64, ptr %16, i64 0
  %18 = load i64, ptr %17, align 8, !tbaa !9
  %19 = lshr i64 %18, 63
  %20 = or i64 %15, %19
  %21 = load ptr, ptr %3, align 8, !tbaa !5
  %22 = getelementptr inbounds i64, ptr %21, i64 1
  store i64 %20, ptr %22, align 8, !tbaa !9
  %23 = load ptr, ptr %4, align 8, !tbaa !5
  %24 = getelementptr inbounds i64, ptr %23, i64 0
  %25 = load i64, ptr %24, align 8, !tbaa !9
  %26 = shl i64 %25, 1
  %27 = load ptr, ptr %3, align 8, !tbaa !5
  %28 = getelementptr inbounds i64, ptr %27, i64 0
  store i64 %26, ptr %28, align 8, !tbaa !9
  %29 = load ptr, ptr %3, align 8, !tbaa !5
  %30 = getelementptr inbounds i64, ptr %29, i64 0
  %31 = load i64, ptr %30, align 8, !tbaa !9
  %32 = xor i64 %31, 135
  store i64 %32, ptr %30, align 8, !tbaa !9
  br label %51

33:                                               ; preds = %2
  %34 = load ptr, ptr %4, align 8, !tbaa !5
  %35 = getelementptr inbounds i64, ptr %34, i64 1
  %36 = load i64, ptr %35, align 8, !tbaa !9
  %37 = shl i64 %36, 1
  %38 = load ptr, ptr %4, align 8, !tbaa !5
  %39 = getelementptr inbounds i64, ptr %38, i64 0
  %40 = load i64, ptr %39, align 8, !tbaa !9
  %41 = lshr i64 %40, 63
  %42 = or i64 %37, %41
  %43 = load ptr, ptr %3, align 8, !tbaa !5
  %44 = getelementptr inbounds i64, ptr %43, i64 1
  store i64 %42, ptr %44, align 8, !tbaa !9
  %45 = load ptr, ptr %4, align 8, !tbaa !5
  %46 = getelementptr inbounds i64, ptr %45, i64 0
  %47 = load i64, ptr %46, align 8, !tbaa !9
  %48 = shl i64 %47, 1
  %49 = load ptr, ptr %3, align 8, !tbaa !5
  %50 = getelementptr inbounds i64, ptr %49, i64 0
  store i64 %48, ptr %50, align 8, !tbaa !9
  br label %51

51:                                               ; preds = %33, %11
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #2
  ret void
}

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, !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"

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: readwrite) uwtable
define dso_local void @gf128_mul_by_2(ptr nocapture noundef writeonly %0, ptr nocapture noundef readonly %1) local_unnamed_addr #0 {
  %3 = getelementptr inbounds i8, ptr %1, i64 8
  %4 = load i64, ptr %3, align 8, !tbaa !5
  %5 = load i64, ptr %1, align 8, !tbaa !5
  %6 = tail call i64 @llvm.fshl.i64(i64 %4, i64 %5, i64 1)
  %7 = getelementptr inbounds i8, ptr %0, i64 8
  store i64 %6, ptr %7, align 8, !tbaa !5
  %8 = load i64, ptr %1, align 8, !tbaa !5
  %9 = shl i64 %8, 1
  %10 = xor i64 %9, 135
  %.not12 = icmp slt i64 %4, 0
  %storemerge = select i1 %.not12, i64 %10, i64 %9
  store i64 %storemerge, ptr %0, align 8, !tbaa !5
  ret void
}

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i64 @llvm.fshl.i64(i64, i64, i64) #1

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: readwrite) 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 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }

!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 = !{!"long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}


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