Add DBG_VALUE support to the linear DAG scheduler
The fast/linear DAG scheduler doesn't lower DBG_VALUEs except for
function entry nodes.
Patch by Joshua Cranmer!
Differential Revision: https://reviews.llvm.org/D43028
llvm-svn: 326631
diff --git a/llvm/lib/CodeGen/SelectionDAG/ScheduleDAGFast.cpp b/llvm/lib/CodeGen/SelectionDAG/ScheduleDAGFast.cpp
index 698e144..f55d85f 100644
--- a/llvm/lib/CodeGen/SelectionDAG/ScheduleDAGFast.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/ScheduleDAGFast.cpp
@@ -13,6 +13,7 @@
#include "InstrEmitter.h"
#include "ScheduleDAGSDNodes.h"
+#include "SDNodeDbgValue.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/SmallSet.h"
#include "llvm/ADT/Statistic.h"
@@ -767,12 +768,24 @@
dbgs() << "\n*** Final schedule ***\n";
});
- // FIXME: Handle dbg_values.
unsigned NumNodes = Sequence.size();
+ MachineBasicBlock *BB = Emitter.getBlock();
for (unsigned i = 0; i != NumNodes; ++i) {
SDNode *N = Sequence[NumNodes-i-1];
DEBUG(N->dump(DAG));
Emitter.EmitNode(N, false, false, VRBaseMap);
+
+ // Emit any debug values associated with the node.
+ if (N->getHasDebugValue()) {
+ MachineBasicBlock::iterator InsertPos = Emitter.getInsertPos();
+ for (auto DV : DAG->GetDbgValues(N)) {
+ if (DV->isInvalidated())
+ continue;
+ if (auto *DbgMI = Emitter.EmitDbgValue(DV, VRBaseMap))
+ BB->insert(InsertPos, DbgMI);
+ DV->setIsInvalidated();
+ }
+ }
}
DEBUG(dbgs() << '\n');