TableGen: Add hasNoSchedulingInfo to instructions

This introduces a new flag that indicates that a specific instruction
will never be present when the MachineScheduler runs and therefore needs
no scheduling information.

This is in preparation for an upcoming commit which checks completeness
of a scheduling model when tablegen runs.

Differential Revision: http://reviews.llvm.org/D17728

llvm-svn: 262383

1 files changed, 2 insertions, 1 deletions

diff --git a/llvm/utils/TableGen/CodeGenSchedule.cpp b/llvm/utils/TableGen/CodeGenSchedule.cpp
index ecae859c9dd..0bce99636bc 100644
--- a/llvm/utils/TableGen/CodeGenSchedule.cpp
+++ b/llvm/utils/TableGen/CodeGenSchedule.cpp
@@ -527,7 +527,8 @@ void CodeGenSchedModels::collectSchedClasses() {
     std::string InstName = Inst->TheDef->getName();
     unsigned SCIdx = InstrClassMap.lookup(Inst->TheDef);
     if (!SCIdx) {
-      dbgs() << "No machine model for " << Inst->TheDef->getName() << '\n';
+      if (!Inst->hasNoSchedulingInfo)
+        dbgs() << "No machine model for " << Inst->TheDef->getName() << '\n';
       continue;
     }
     CodeGenSchedClass &SC = getSchedClass(SCIdx);