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AsmParser: Split out LineField, NFC

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Split out `LineField`, which restricts the legal line numbers.  This
will make it easier to be consistent between different node parsers.

llvm-svn: 228226
This commit is contained in:
Duncan P. N. Exon Smith 2015-02-04 22:59:18 +00:00
parent 0d1a9ddbbe
commit 44f9466ee2
1 changed files with 17 additions and 2 deletions
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19
lib/AsmParser/LLParser.cpp
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@ -2945,6 +2945,12 @@ struct MDUnsignedField : public MDFieldImpl<uint64_t> {
MDUnsignedField(uint64_t Default = 0, uint64_t Max = UINT64_MAX)
: ImplTy(Default), Max(Max) {}
};
struct LineField : public MDUnsignedField {
LineField() : MDUnsignedField(0, UINT32_MAX >> 8) {}
};
struct ColumnField : public MDUnsignedField {
ColumnField() : MDUnsignedField(0, UINT16_MAX) {}
};
struct DwarfTagField : public MDUnsignedField {
DwarfTagField() : MDUnsignedField(0, ~0u >> 16) {}
};
@ -2978,6 +2984,15 @@ bool LLParser::ParseMDField(LocTy Loc, StringRef Name,
return false;
}
template <>
bool LLParser::ParseMDField(LocTy Loc, StringRef Name, LineField &Result) {
return ParseMDField(Loc, Name, static_cast<MDUnsignedField &>(Result));
}
template <>
bool LLParser::ParseMDField(LocTy Loc, StringRef Name, ColumnField &Result) {
return ParseMDField(Loc, Name, static_cast<MDUnsignedField &>(Result));
}
template <>
bool LLParser::ParseMDField(LocTy Loc, StringRef Name, DwarfTagField &Result) {
if (Lex.getKind() == lltok::APSInt)
@ -3105,8 +3120,8 @@ bool LLParser::ParseSpecializedMDNode(MDNode *&N, bool IsDistinct) {
/// ::= !MDLocation(line: 43, column: 8, scope: !5, inlinedAt: !6)
bool LLParser::ParseMDLocation(MDNode *&Result, bool IsDistinct) {
#define VISIT_MD_FIELDS(OPTIONAL, REQUIRED) \
OPTIONAL(line, MDUnsignedField, (0, ~0u >> 8)); \
OPTIONAL(column, MDUnsignedField, (0, ~0u >> 16)); \
OPTIONAL(line, LineField, ); \
OPTIONAL(column, ColumnField, ); \
REQUIRED(scope, MDField, ); \
OPTIONAL(inlinedAt, MDField, );
PARSE_MD_FIELDS();