Index: lib/CodeGen/AggressiveAntiDepBreaker.cpp
===================================================================
--- lib/CodeGen/AggressiveAntiDepBreaker.cpp
+++ lib/CodeGen/AggressiveAntiDepBreaker.cpp
@@ -369,7 +369,7 @@
     // reference either system calls or the register directly. Skip it until we
     // can tell user specified registers from compiler-specified.
     if (MI.isCall() || MI.hasExtraDefRegAllocReq() || TII->isPredicated(MI) ||
-        MI.isInlineAsm()) {
+        MI.isInlineAsm() || MI.isRegTiedToUseOperand(i)) {
       DEBUG(if (State->GetGroup(Reg) != 0) dbgs() << "->g0(alloc-req)");
       State->UnionGroups(Reg, 0);
     }
@@ -464,7 +464,7 @@
     // for the register.
     HandleLastUse(Reg, Count, "(last-use)");
 
-    if (Special) {
+    if (Special || MI.isRegTiedToDefOperand(i)) {
       DEBUG(if (State->GetGroup(Reg) != 0) dbgs() << "->g0(alloc-req)");
       State->UnionGroups(Reg, 0);
     }