================
@@ -1472,5 +1473,38 @@ IdentifierInfo *ParseHLSLRootSignature(Sema &Actions,
return DeclIdent;
}
+void HandleRootSignatureTarget(Sema &S, StringRef EntryRootSig) {
+ ASTConsumer *Consumer = &S.getASTConsumer();
+
+ // Minimally initalize the parser. This does a couple things:
+ // - initializes Sema scope handling
+ // - invokes HLSLExternalSemaSource
+ // - invokes the preprocessor to lex the macros in the file
+ std::unique_ptr<Parser> P(new Parser(S.getPreprocessor(), S, true));
+ S.getPreprocessor().EnterMainSourceFile();
+
+ bool HaveLexer = S.getPreprocessor().getCurrentLexer();
+ if (HaveLexer) {
+ P->Initialize();
+ S.ActOnStartOfTranslationUnit();
+
+ // Skim through the file to parse to find the define
+ while (P->getCurToken().getKind() != tok::eof)
+ P->ConsumeAnyToken();
+
----------------
inbelic wrote:
For some reason this is required when invoking with `clang-dxc`. Without it the
`OBJ` portion of this [test
case](https://github.com/llvm/llvm-project/pull/156373/files#diff-38f2db6a18b59091b883cc1c74cbfb3adfe6efb5cf461d146de185844d91cfc9)
will fail with an error that `EntryRS` is not defined.
If these lines are removed all other test cases still pass. The other
test-cases are all invoked directly with `clang -cc1` and will invoke the
[`MacroDefined`
callback](https://github.com/llvm/llvm-project/blob/50d72e692c0d45134422956fff10e779ce822b7f/clang/lib/Frontend/FrontendActions.cpp#L1272)
during the first lex in `P->Initialize()`.
Perhaps there is some option that `clang-dxc` invokes `clang -cc1` that
disables macro expansion before directly needed?
https://github.com/llvm/llvm-project/pull/156373
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