Pass DebugLoc and SDLoc by const ref.
This used to be free, copying and moving DebugLocs became expensive
after the metadata rewrite. Passing by reference eliminates a ton of
track/untrack operations. No functionality change intended.
llvm-svn: 272512
diff --git a/llvm/lib/CodeGen/SelectionDAG/InstrEmitter.cpp b/llvm/lib/CodeGen/SelectionDAG/InstrEmitter.cpp
index 8f0f4bed..4448b05 100644
--- a/llvm/lib/CodeGen/SelectionDAG/InstrEmitter.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/InstrEmitter.cpp
@@ -441,7 +441,7 @@
}
unsigned InstrEmitter::ConstrainForSubReg(unsigned VReg, unsigned SubIdx,
- MVT VT, DebugLoc DL) {
+ MVT VT, const DebugLoc &DL) {
const TargetRegisterClass *VRC = MRI->getRegClass(VReg);
const TargetRegisterClass *RC = TRI->getSubClassWithSubReg(VRC, SubIdx);