1fdf952dee
HLSL has a language feature called Semantics which get attached to declarations like attributes and are used in a variety of ways. One example of semantic use is here with the `SV_GroupIndex` semantic which, when applied to an input for a compute shader is pre-populated by the driver with a flattened thread index. Differential Revision: https://reviews.llvm.org/D122699 # Conflicts: # clang/include/clang/Basic/Attr.td # clang/include/clang/Basic/AttrDocs.td
43 lines
1.4 KiB
C++
43 lines
1.4 KiB
C++
//===--- ParseHLSL.cpp - HLSL-specific parsing support --------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements the parsing logic for HLSL language features.
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//
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//===----------------------------------------------------------------------===//
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#include "clang/Basic/AttributeCommonInfo.h"
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#include "clang/Parse/ParseDiagnostic.h"
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#include "clang/Parse/Parser.h"
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using namespace clang;
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void Parser::ParseHLSLSemantics(ParsedAttributes &Attrs,
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SourceLocation *EndLoc) {
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assert(Tok.is(tok::colon) && "Not a HLSL Semantic");
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ConsumeToken();
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if (!Tok.is(tok::identifier)) {
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Diag(Tok.getLocation(), diag::err_expected_semantic_identifier);
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return;
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}
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IdentifierInfo *II = Tok.getIdentifierInfo();
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SourceLocation Loc = ConsumeToken();
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if (EndLoc)
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*EndLoc = Tok.getLocation();
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ParsedAttr::Kind AttrKind =
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ParsedAttr::getParsedKind(II, nullptr, ParsedAttr::AS_HLSLSemantic);
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if (AttrKind == ParsedAttr::UnknownAttribute) {
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Diag(Loc, diag::err_unknown_hlsl_semantic) << II;
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return;
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}
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Attrs.addNew(II, Loc, nullptr, SourceLocation(), nullptr, 0,
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ParsedAttr::AS_HLSLSemantic);
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}
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