Emit COPY instructions instead of using copyRegToReg in InstrEmitter,
ScheduleDAGEmit, TwoAddressLowering, and PHIElimination.
This switches the bulk of register copies to using COPY, but many less used
copyRegToReg calls remain.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108050 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/PHIElimination.cpp b/lib/CodeGen/PHIElimination.cpp
index 007d4d9..ea6b094 100644
--- a/lib/CodeGen/PHIElimination.cpp
+++ b/lib/CodeGen/PHIElimination.cpp
@@ -183,7 +183,6 @@
// Create a new register for the incoming PHI arguments.
MachineFunction &MF = *MBB.getParent();
- const TargetRegisterClass *RC = MF.getRegInfo().getRegClass(DestReg);
unsigned IncomingReg = 0;
bool reusedIncoming = false; // Is IncomingReg reused from an earlier PHI?
@@ -207,10 +206,12 @@
++NumReused;
DEBUG(dbgs() << "Reusing %reg" << IncomingReg << " for " << *MPhi);
} else {
+ const TargetRegisterClass *RC = MF.getRegInfo().getRegClass(DestReg);
entry = IncomingReg = MF.getRegInfo().createVirtualRegister(RC);
}
- TII->copyRegToReg(MBB, AfterPHIsIt, DestReg, IncomingReg, RC, RC,
- MPhi->getDebugLoc());
+ BuildMI(MBB, AfterPHIsIt, MPhi->getDebugLoc(),
+ TII->get(TargetOpcode::COPY), DestReg)
+ .addReg(IncomingReg);
}
// Update live variable information if there is any.
@@ -292,8 +293,8 @@
// Insert the copy.
if (!reusedIncoming && IncomingReg)
- TII->copyRegToReg(opBlock, InsertPos, IncomingReg, SrcReg, RC, RC,
- MPhi->getDebugLoc());
+ BuildMI(opBlock, InsertPos, MPhi->getDebugLoc(),
+ TII->get(TargetOpcode::COPY), IncomingReg).addReg(SrcReg);
// Now update live variable information if we have it. Otherwise we're done
if (!LV) continue;