From b51ae5ef110e8cee43a28e207ffdbd1c681699ac Mon Sep 17 00:00:00 2001
From: Craig Topper <craig.topper@gmail.com>
Date: Sat, 28 Nov 2015 08:23:02 +0000
Subject: [PATCH] [TableGen] Use SmallString instead of std::string to build up
a string to avoid heap allocations. NFC
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@254221 91177308-0d34-0410-b5e6-96231b3b80d8
---
utils/TableGen/CodeGenDAGPatterns.cpp | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/utils/TableGen/CodeGenDAGPatterns.cpp b/utils/TableGen/CodeGenDAGPatterns.cpp
index 6ba4a8dbda7..3f74a9999c9 100644
--- a/utils/TableGen/CodeGenDAGPatterns.cpp
+++ b/utils/TableGen/CodeGenDAGPatterns.cpp
@@ -14,6 +14,7 @@
#include "CodeGenDAGPatterns.h"
#include "llvm/ADT/STLExtras.h"
+#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/Twine.h"
#include "llvm/Support/Debug.h"
@@ -873,14 +874,14 @@ std::string PatternToMatch::getPredicateCheck() const {
// Sort so that different orders get canonicalized to the same string.
std::sort(PredicateRecs.begin(), PredicateRecs.end(), LessRecord());
- std::string PredicateCheck;
+ SmallString<128> PredicateCheck;
for (Record *Pred : PredicateRecs) {
if (!PredicateCheck.empty())
PredicateCheck += " && ";
PredicateCheck += "(" + Pred->getValueAsString("CondString") + ")";
}
- return PredicateCheck;
+ return PredicateCheck.str();
}
//===----------------------------------------------------------------------===//