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author | Simon Pilgrim <llvm-dev@redking.me.uk> | 2018-03-24 21:04:20 +0000 |
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committer | Simon Pilgrim <llvm-dev@redking.me.uk> | 2018-03-24 21:04:20 +0000 |
commit | 79483b2bf49729363ca18014ba7e1e9dfc4e4f9a (patch) | |
tree | c9acb296951283d0ca7f9ec85ae00852c667de98 | |
parent | 9a7f9fe9d616a5e72e0fde51a1af2c7742f8c7ad (diff) |
[SchedModel] Avoid std::string creation for instregex patterns that don't contain regex metas. NFCI.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@328436 91177308-0d34-0410-b5e6-96231b3b80d8
-rw-r--r-- | utils/TableGen/CodeGenSchedule.cpp | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/utils/TableGen/CodeGenSchedule.cpp b/utils/TableGen/CodeGenSchedule.cpp index 1b516c17530..b73e0767e3b 100644 --- a/utils/TableGen/CodeGenSchedule.cpp +++ b/utils/TableGen/CodeGenSchedule.cpp @@ -95,9 +95,10 @@ struct InstRegexOp : public SetTheory::Operator { Optional<Regex> Regexpr = None; StringRef Prefix = Original.substr(0, FirstMeta); - std::string pat = Original.substr(FirstMeta); - if (!pat.empty()) { + StringRef PatStr = Original.substr(FirstMeta); + if (!PatStr.empty()) { // For the rest use a python-style prefix match. + std::string pat = PatStr; if (pat[0] != '^') { pat.insert(0, "^("); pat.insert(pat.end(), ')'); |