#include "llvm/CodeGen/GlobalISel/CSEMIRBuilder.h"
#include "llvm/CodeGen/GlobalISel/GISelChangeObserver.h"
+#include "llvm/IR/DebugInfoMetadata.h"
using namespace llvm;
if (Op.getDstOpKind() == DstOp::DstType::Ty_Reg)
return buildCopy(Op.getReg(), MIB.getReg(0));
}
+
+ // If we didn't generate a copy then we're re-using an existing node directly
+ // instead of emitting any code. Merge the debug location we wanted to emit
+ // into the instruction we're CSE'ing with. Debug locations arent part of the
+ // profile so we don't need to recompute it.
+ if (getDebugLoc()) {
+ GISelChangeObserver *Observer = getState().Observer;
+ if (Observer)
+ Observer->changingInstr(*MIB);
+ MIB->setDebugLoc(
+ DILocation::getMergedLocation(MIB->getDebugLoc(), getDebugLoc()));
+ if (Observer)
+ Observer->changedInstr(*MIB);
+ }
+
return MIB;
}