Revert "Speculative buildbot fix after ca2e8f"

This reverts commit bd2dac9, and part of ca2e8fc.

My speculative attempt at fixing buildbot failed, so just roll back the
relavant part of the change.

Author: preames

llvm/lib/CodeGen/RegAllocScore.cpp

@@ -79,11 +79,8 @@ llvm::calculateRegAllocScore(const MachineFunction &MF,
         return MBFI.getBlockFreqRelativeToEntryBlock(&MBB);
       },
       [&](const MachineInstr &MI) {
-        auto *TTI = MF.getSubtarget().getInstrInfo();
-        return TTI->isTriviallyReMaterializable(MI) &&
-               llvm::all_of(MI.all_uses(), [](const MachineOperand &MO) {
-                 return MO.getReg().isVirtual();
-               });
+        return MF.getSubtarget().getInstrInfo()->isTriviallyReMaterializable(
+            MI);
       });
 }
 

llvm/test/CodeGen/MLRegAlloc/dev-mode-logging.ll

@@ -33,7 +33,7 @@
 ; NOML:      observation: 17
 ; ML:      observation: 83
 ; ML: reward: 38.42
-; NOML: reward: 39.07316970825195
+; NOML: reward: 37.06
 
 
 ; CHECK-TWO-FCTS: context: SyFgets

llvm/test/CodeGen/MLRegAlloc/dev-mode-prio-logging.ll

@@ -23,6 +23,6 @@
 
 ; CHECK-NOT: nan
 ; CHECK-LABEL: priority:
-; NOML-SAME: 2684354560.0
+; NOML-SAME: 2684358144.0
 ; ML-SAME: 3535
 ; CHECK-LABEL: reward: