+/// ParseUnnamedAttrGrp
+/// ::= 'attributes' AttrGrpID '=' '{' AttrValPair+ '}'
+bool LLParser::ParseUnnamedAttrGrp() {
+ assert(Lex.getKind() == lltok::kw_attributes);
+ LocTy AttrGrpLoc = Lex.getLoc();
+ Lex.Lex();
+
+ assert(Lex.getKind() == lltok::AttrGrpID);
+ unsigned VarID = Lex.getUIntVal();
+ std::vector<unsigned> unused;
+ LocTy BuiltinLoc;
+ Lex.Lex();
+
+ if (ParseToken(lltok::equal, "expected '=' here") ||
+ ParseToken(lltok::lbrace, "expected '{' here") ||
+ ParseFnAttributeValuePairs(NumberedAttrBuilders[VarID], unused, true,
+ BuiltinLoc) ||
+ ParseToken(lltok::rbrace, "expected end of attribute group"))
+ return true;
+
+ if (!NumberedAttrBuilders[VarID].hasAttributes())
+ return Error(AttrGrpLoc, "attribute group has no attributes");
+
+ return false;
+}
+
+/// ParseFnAttributeValuePairs
+/// ::= <attr> | <attr> '=' <value>
+bool LLParser::ParseFnAttributeValuePairs(AttrBuilder &B,
+ std::vector<unsigned> &FwdRefAttrGrps,
+ bool inAttrGrp, LocTy &BuiltinLoc) {
+ bool HaveError = false;
+
+ B.clear();
+
+ while (true) {
+ lltok::Kind Token = Lex.getKind();
+ if (Token == lltok::kw_builtin)
+ BuiltinLoc = Lex.getLoc();
+ switch (Token) {
+ default:
+ if (!inAttrGrp) return HaveError;
+ return Error(Lex.getLoc(), "unterminated attribute group");
+ case lltok::rbrace:
+ // Finished.
+ return false;
+
+ case lltok::AttrGrpID: {
+ // Allow a function to reference an attribute group:
+ //
+ // define void @foo() #1 { ... }
+ if (inAttrGrp)
+ HaveError |=
+ Error(Lex.getLoc(),
+ "cannot have an attribute group reference in an attribute group");
+
+ unsigned AttrGrpNum = Lex.getUIntVal();
+ if (inAttrGrp) break;
+
+ // Save the reference to the attribute group. We'll fill it in later.
+ FwdRefAttrGrps.push_back(AttrGrpNum);
+ break;
+ }
+ // Target-dependent attributes:
+ case lltok::StringConstant: {
+ std::string Attr = Lex.getStrVal();
+ Lex.Lex();
+ std::string Val;
+ if (EatIfPresent(lltok::equal) &&
+ ParseStringConstant(Val))
+ return true;
+
+ B.addAttribute(Attr, Val);
+ continue;
+ }
+
+ // Target-independent attributes:
+ case lltok::kw_align: {
+ // As a hack, we allow function alignment to be initially parsed as an
+ // attribute on a function declaration/definition or added to an attribute
+ // group and later moved to the alignment field.
+ unsigned Alignment;
+ if (inAttrGrp) {
+ Lex.Lex();
+ if (ParseToken(lltok::equal, "expected '=' here") ||
+ ParseUInt32(Alignment))
+ return true;
+ } else {
+ if (ParseOptionalAlignment(Alignment))
+ return true;
+ }
+ B.addAlignmentAttr(Alignment);
+ continue;
+ }
+ case lltok::kw_alignstack: {
+ unsigned Alignment;
+ if (inAttrGrp) {
+ Lex.Lex();
+ if (ParseToken(lltok::equal, "expected '=' here") ||
+ ParseUInt32(Alignment))
+ return true;
+ } else {
+ if (ParseOptionalStackAlignment(Alignment))
+ return true;
+ }
+ B.addStackAlignmentAttr(Alignment);
+ continue;
+ }
+ case lltok::kw_alwaysinline: B.addAttribute(Attribute::AlwaysInline); break;
+ case lltok::kw_builtin: B.addAttribute(Attribute::Builtin); break;
+ case lltok::kw_cold: B.addAttribute(Attribute::Cold); break;
+ case lltok::kw_inlinehint: B.addAttribute(Attribute::InlineHint); break;
+ case lltok::kw_minsize: B.addAttribute(Attribute::MinSize); break;
+ case lltok::kw_naked: B.addAttribute(Attribute::Naked); break;
+ case lltok::kw_nobuiltin: B.addAttribute(Attribute::NoBuiltin); break;
+ case lltok::kw_noduplicate: B.addAttribute(Attribute::NoDuplicate); break;
+ case lltok::kw_noimplicitfloat: B.addAttribute(Attribute::NoImplicitFloat); break;
+ case lltok::kw_noinline: B.addAttribute(Attribute::NoInline); break;
+ case lltok::kw_nonlazybind: B.addAttribute(Attribute::NonLazyBind); break;
+ case lltok::kw_noredzone: B.addAttribute(Attribute::NoRedZone); break;
+ case lltok::kw_noreturn: B.addAttribute(Attribute::NoReturn); break;
+ case lltok::kw_nounwind: B.addAttribute(Attribute::NoUnwind); break;
+ case lltok::kw_optsize: B.addAttribute(Attribute::OptimizeForSize); break;
+ case lltok::kw_readnone: B.addAttribute(Attribute::ReadNone); break;
+ case lltok::kw_readonly: B.addAttribute(Attribute::ReadOnly); break;
+ case lltok::kw_returns_twice: B.addAttribute(Attribute::ReturnsTwice); break;
+ case lltok::kw_ssp: B.addAttribute(Attribute::StackProtect); break;
+ case lltok::kw_sspreq: B.addAttribute(Attribute::StackProtectReq); break;
+ case lltok::kw_sspstrong: B.addAttribute(Attribute::StackProtectStrong); break;
+ case lltok::kw_sanitize_address: B.addAttribute(Attribute::SanitizeAddress); break;
+ case lltok::kw_sanitize_thread: B.addAttribute(Attribute::SanitizeThread); break;
+ case lltok::kw_sanitize_memory: B.addAttribute(Attribute::SanitizeMemory); break;
+ case lltok::kw_uwtable: B.addAttribute(Attribute::UWTable); break;
+
+ // Error handling.
+ case lltok::kw_inreg:
+ case lltok::kw_signext:
+ case lltok::kw_zeroext:
+ HaveError |=
+ Error(Lex.getLoc(),
+ "invalid use of attribute on a function");
+ break;
+ case lltok::kw_byval:
+ case lltok::kw_nest:
+ case lltok::kw_noalias:
+ case lltok::kw_nocapture:
+ case lltok::kw_returned:
+ case lltok::kw_sret:
+ HaveError |=
+ Error(Lex.getLoc(),
+ "invalid use of parameter-only attribute on a function");
+ break;
+ }
+
+ Lex.Lex();
+ }
+}