Restore hasPostISelHook tblgen flag.
No functionality change. The hook makes it explicit which patterns
require "special" handling. i.e. it self-documents tblgen
deficiencies. I plan to add verification in ExpandISelPseudos and
Thumb2SizeReduce to catch any missing hasPostISelHooks. Otherwise it's
too fragile.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140160 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
index 9f2369d..b684619 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
@@ -179,7 +179,12 @@
void TargetLowering::AdjustInstrPostInstrSelection(MachineInstr *MI,
SDNode *Node) const {
- // Do nothing unless the target overrides it.
+#ifndef NDEBUG
+ dbgs() << "If a target marks an instruction with "
+ "'hasPostISelHook', it must implement "
+ "TargetLowering::AdjustInstrPostInstrSelection!";
+#endif
+ llvm_unreachable(0);
}
//===----------------------------------------------------------------------===//