Replace some unnecessary vector copies with references.
llvm-svn: 190770
diff --git a/llvm/lib/Target/SystemZ/SystemZConstantPoolValue.cpp b/llvm/lib/Target/SystemZ/SystemZConstantPoolValue.cpp
index e9c4f6d..6c70811 100644
--- a/llvm/lib/Target/SystemZ/SystemZConstantPoolValue.cpp
+++ b/llvm/lib/Target/SystemZ/SystemZConstantPoolValue.cpp
@@ -39,7 +39,7 @@
int SystemZConstantPoolValue::
getExistingMachineCPValue(MachineConstantPool *CP, unsigned Alignment) {
unsigned AlignMask = Alignment - 1;
- const std::vector<MachineConstantPoolEntry> Constants = CP->getConstants();
+ const std::vector<MachineConstantPoolEntry> &Constants = CP->getConstants();
for (unsigned I = 0, E = Constants.size(); I != E; ++I) {
if (Constants[I].isMachineConstantPoolEntry() &&
(Constants[I].getAlignment() & AlignMask) == 0) {