Trivial change to set UseLeaForSP flag in addition to toggling
the FeatureLeaForSP feature bit when llvm auto detects Intel Atom.

Patch by Andy Zhang

llvm-svn: 155655

llvm/lib/Target/X86/X86Subtarget.cpp

@@ -255,6 +255,8 @@ void X86Subtarget::AutoDetectSubtargetFeatures() {
     // Set processor type. Currently only Atom is detected.
     if (Family == 6 && Model == 28) {
       X86ProcFamily = IntelAtom;
+
+      UseLeaForSP = true;
       ToggleFeature(X86::FeatureLeaForSP);
     }