Handle some 64-bit atomics on x86-32, some of the time.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56963 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/utils/TableGen/CodeGenInstruction.cpp b/utils/TableGen/CodeGenInstruction.cpp
index 37c2069..2a5b0bf9 100644
--- a/utils/TableGen/CodeGenInstruction.cpp
+++ b/utils/TableGen/CodeGenInstruction.cpp
@@ -21,7 +21,8 @@
// 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");