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Cache AllowAtInIdentifier as class variable in AsmLexer

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This commit caches the value of the AllowAtInIdentifier variable as
a class variable in AsmLexer. We do this to avoid repeated MAI
queries and string comparisons each time we lex an identifier.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@196622 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
David Peixotto 2013-12-06 23:05:33 +00:00
parent 74999cfe0c
commit 7db4f8d9d8
2 changed files with 2 additions and 1 deletions
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1
include/llvm/MC/MCParser/AsmLexer.h
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@ -30,6 +30,7 @@ class AsmLexer : public MCAsmLexer {
const char *CurPtr; const char *CurPtr;
const MemoryBuffer *CurBuf; const MemoryBuffer *CurBuf;
bool isAtStartOfLine; bool isAtStartOfLine;
bool AllowAtInIdentifier; // Cached here to avoid repeated MAI query.
void operator=(const AsmLexer&) LLVM_DELETED_FUNCTION; void operator=(const AsmLexer&) LLVM_DELETED_FUNCTION;
AsmLexer(const AsmLexer&) LLVM_DELETED_FUNCTION; AsmLexer(const AsmLexer&) LLVM_DELETED_FUNCTION;

2
lib/MC/MCParser/AsmLexer.cpp
View File

@ -25,6 +25,7 @@ AsmLexer::AsmLexer(const MCAsmInfo &_MAI) : MAI(_MAI) {
CurBuf = NULL; CurBuf = NULL;
CurPtr = NULL; CurPtr = NULL;
isAtStartOfLine = true; isAtStartOfLine = true;
AllowAtInIdentifier = !StringRef(MAI.getCommentString()).startswith("@");
} }
AsmLexer::~AsmLexer() { AsmLexer::~AsmLexer() {
@ -144,7 +145,6 @@ static bool IsIdentifierChar(char c, bool AllowAt) {
(c == '@' && AllowAt) || c == '?'; (c == '@' && AllowAt) || c == '?';
} }
AsmToken AsmLexer::LexIdentifier() { AsmToken AsmLexer::LexIdentifier() {
bool AllowAtInIdentifier = !StringRef(MAI.getCommentString()).startswith("@");
// Check for floating point literals. // Check for floating point literals.
if (CurPtr[-1] == '.' && isdigit(*CurPtr)) { if (CurPtr[-1] == '.' && isdigit(*CurPtr)) {
// Disambiguate a .1243foo identifier from a floating literal. // Disambiguate a .1243foo identifier from a floating literal.