Esempio n. 1
0
        public override void RewriteConditional(ref BasicBlock block)
        {
            var evaluated = Context.Options.IsFeatureEnabled(Feature);

            Scanner.LogDebug(1, $"REWRITE FEATURE CONDITIONAL: {Feature} {evaluated}");


            if (evaluated)
            {
                BlockList.DeleteBlock(ref block);
                return;
            }

            Context.LogMessage(MessageImportance.High, Environment.NewLine);
            Context.LogMessage(MessageImportance.High, $"Required feature `{Feature}` not available.");
#if FIXME
            Context.Context.Tracer.Dump();
#endif
            Context.LogMessage(MessageImportance.High, Environment.NewLine);

            var pns  = Context.Context.GetType("System.PlatformNotSupportedException");
            var ctor = pns?.Methods.FirstOrDefault(m => m.Name == ".ctor");
            if (ctor == null)
            {
                throw new OptimizerAssertionException($"Can't find `System.PlatformNotSupportedException`.");
            }

            Scanner.LogDebug(1, $"REWRITE FEATURE CONDITIONAL #1: {pns} {ctor}");

            var reference = Method.DeclaringType.Module.ImportReference(ctor);

            BlockList.ReplaceInstructionAt(ref block, 0, Instruction.Create(OpCodes.Newobj, reference));
            BlockList.ReplaceInstructionAt(ref block, 1, Instruction.Create(OpCodes.Throw));
        }