MachineRegisterInfo: Introduce isPhysRegUsed()

[oota-llvm.git] / lib / CodeGen / MachineInstr.cpp

diff --git a/lib/CodeGen/MachineInstr.cpp b/lib/CodeGen/MachineInstr.cpp
index c3d584262776e15fd47a442cd855cc15d0b96732..e072ee1d6d509307b6ef8315d8e3313cde52c72d 100644 (file)
--- a/lib/CodeGen/MachineInstr.cpp
+++ b/lib/CodeGen/MachineInstr.cpp
@@ -1503,6 +1503,10 @@ bool MachineInstr::hasUnmodeledSideEffects() const {
   return false;
 }
 
+bool MachineInstr::isLoadFoldBarrier() const {
+  return mayStore() || isCall() || hasUnmodeledSideEffects();
+}
+
 /// allDefsAreDead - Return true if all the defs of this instruction are dead.
 ///
 bool MachineInstr::allDefsAreDead() const {