Don't use a potentially expensive shift if all we want is one set bit.

[oota-llvm.git] / lib / Support / Regex.cpp

diff --git a/lib/Support/Regex.cpp b/lib/Support/Regex.cpp
index d293da07d684047543478817f57441ff3708324d..efc8b90a009091a42ff18b0094ba4bce8029e784 100644 (file)
--- a/lib/Support/Regex.cpp
+++ b/lib/Support/Regex.cpp
@@ -12,10 +12,10 @@
 //===----------------------------------------------------------------------===//
 
 #include "llvm/Support/Regex.h"
+#include "regex_impl.h"
+#include "llvm/ADT/SmallVector.h"
 #include "llvm/Support/ErrorHandling.h"
 #include "llvm/Support/raw_ostream.h"
-#include "llvm/ADT/SmallVector.h"
-#include "regex_impl.h"
 #include <string>
 using namespace llvm;
 
@@ -27,7 +27,9 @@ Regex::Regex(StringRef regex, unsigned Flags) {
     flags |= REG_ICASE;
   if (Flags & Newline)
     flags |= REG_NEWLINE;
-  error = llvm_regcomp(preg, regex.data(), flags|REG_EXTENDED|REG_PEND);
+  if (!(Flags & BasicRegex))
+    flags |= REG_EXTENDED;
+  error = llvm_regcomp(preg, regex.data(), flags|REG_PEND);
 }
 
 Regex::~Regex() {