[X86] X86InstrInfo.cpp - try to pass DebugLoc by const-ref to avoid costly TrackingMD...

diff --git a/llvm/lib/Target/X86/X86InstrInfo.cpp b/llvm/lib/Target/X86/X86InstrInfo.cpp
index 981c735..dc163e4 100644 (file)
--- a/llvm/lib/Target/X86/X86InstrInfo.cpp
+++ b/llvm/lib/Target/X86/X86InstrInfo.cpp
@@ -4498,7 +4498,7 @@ static bool Expand2AddrKreg(MachineInstrBuilder &MIB, const MCInstrDesc &Desc,
 static bool expandMOV32r1(MachineInstrBuilder &MIB, const TargetInstrInfo &TII,
                           bool MinusOne) {
   MachineBasicBlock &MBB = *MIB->getParent();
-  DebugLoc DL = MIB->getDebugLoc();
+  const DebugLoc &DL = MIB->getDebugLoc();
   Register Reg = MIB.getReg(0);
 
   // Insert the XOR.
@@ -4517,7 +4517,7 @@ static bool ExpandMOVImmSExti8(MachineInstrBuilder &MIB,
                                const TargetInstrInfo &TII,
                                const X86Subtarget &Subtarget) {
   MachineBasicBlock &MBB = *MIB->getParent();
-  DebugLoc DL = MIB->getDebugLoc();
+  const DebugLoc &DL = MIB->getDebugLoc();
   int64_t Imm = MIB->getOperand(1).getImm();
   assert(Imm != 0 && "Using push/pop for 0 is not efficient.");
   MachineBasicBlock::iterator I = MIB.getInstr();
@@ -4574,7 +4574,7 @@ static bool ExpandMOVImmSExti8(MachineInstrBuilder &MIB,
 static void expandLoadStackGuard(MachineInstrBuilder &MIB,
                                  const TargetInstrInfo &TII) {
   MachineBasicBlock &MBB = *MIB->getParent();
-  DebugLoc DL = MIB->getDebugLoc();
+  const DebugLoc &DL = MIB->getDebugLoc();
   Register Reg = MIB.getReg(0);
   const GlobalValue *GV =
       cast<GlobalValue>((*MIB->memoperands_begin())->getValue());