[llvmonly] Use right IMT slow path for lazy array interfaces (#4199)

diff --git a/mono/mini/method-to-ir.c b/mono/mini/method-to-ir.c
index 6a72b4cad07994a7b583916757ca5224bf0eae63..b6aa5b538cb5e1e2dbd24ec52b75c8557c8f563f 100644 (file)
--- a/mono/mini/method-to-ir.c
+++ b/mono/mini/method-to-ir.c
@@ -7009,6 +7009,7 @@ emit_llvmonly_virtual_call (MonoCompile *cfg, MonoMethod *cmethod, MonoMethodSig
        gboolean variant_iface = FALSE;
        guint32 slot;
        int offset;
+       gboolean special_array_interface = cmethod->klass->is_array_special_interface;
 
        /*
         * In llvm-only mode, vtables contain function descriptors instead of
@@ -7067,7 +7068,7 @@ emit_llvmonly_virtual_call (MonoCompile *cfg, MonoMethod *cmethod, MonoMethodSig
                return emit_extra_arg_calli (cfg, fsig, sp, arg_reg, call_target);
        }
 
-       if (!fsig->generic_param_count && is_iface && !variant_iface && !is_gsharedvt) {
+       if (!fsig->generic_param_count && is_iface && !variant_iface && !is_gsharedvt && !special_array_interface) {
                /*
                 * A simple interface call
                 *
@@ -7106,7 +7107,7 @@ emit_llvmonly_virtual_call (MonoCompile *cfg, MonoMethod *cmethod, MonoMethodSig
                return emit_llvmonly_calli (cfg, fsig, sp, ftndesc_ins);
        }
 
-       if ((fsig->generic_param_count || variant_iface) && !is_gsharedvt) {
+       if ((fsig->generic_param_count || variant_iface || special_array_interface) && !is_gsharedvt) {
                /*
                 * This is similar to the interface case, the vtable slot points to an imt thunk which is
                 * dynamically extended as more instantiations are discovered.