Handle some 64-bit atomics on x86-32, some of the time.

llvm-svn: 56963

1 files changed, 2 insertions, 1 deletions

diff --git a/llvm/utils/TableGen/CodeGenInstruction.cpp b/llvm/utils/TableGen/CodeGenInstruction.cpp
index 37c2069ec72..2a5b0bf99b4 100644
--- a/llvm/utils/TableGen/CodeGenInstruction.cpp
+++ b/llvm/utils/TableGen/CodeGenInstruction.cpp
@@ -21,7 +21,8 @@ static void ParseConstraint(const std::string &CStr, CodeGenInstruction *I) {
   // FIXME: Only supports TIED_TO for now.
   std::string::size_type pos = CStr.find_first_of('=');
   assert(pos != std::string::npos && "Unrecognized constraint");
-  std::string Name = CStr.substr(0, pos);
+  std::string::size_type start = CStr.find_first_not_of(" \t");
+  std::string Name = CStr.substr(start, pos);
   
   // TIED_TO: $src1 = $dst
   std::string::size_type wpos = Name.find_first_of(" \t");