[PATCH] D68264: [AMDGPU] Add VerifyScheduling support.

[Jay Foad via Phabricator via llvm-commits]

foad created this revision.
foad added reviewers: arsenm, atrick, tstellar, vpykhtin.
Herald added subscribers: javed.absar, hiraditya, t-tye, tpr, dstuttard, yaxunl, nhaehnle, wdng, jvesely, kzhuravl, MatzeB.
Herald added a project: LLVM.

This is cut and pasted from the corresponding GenericScheduler
functions.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D68264

Files:
  llvm/include/llvm/CodeGen/MachineScheduler.h
  llvm/lib/CodeGen/MachineScheduler.cpp
  llvm/lib/Target/AMDGPU/GCNSchedStrategy.cpp


Index: llvm/lib/Target/AMDGPU/GCNSchedStrategy.cpp
===================================================================
--- llvm/lib/Target/AMDGPU/GCNSchedStrategy.cpp
+++ llvm/lib/Target/AMDGPU/GCNSchedStrategy.cpp
@@ -196,6 +196,15 @@
     assert(BotCand.Reason != NoCand && "failed to find the first candidate");
   } else {
     LLVM_DEBUG(traceCandidate(BotCand));
+#ifndef NDEBUG
+    if (VerifyScheduling) {
+      SchedCandidate TCand;
+      TCand.reset(CandPolicy());
+      pickNodeFromQueue(Bot, BotPolicy, DAG->getBotRPTracker(), TCand);
+      assert(TCand.SU == BotCand.SU &&
+             "Last pick result should correspond to re-picking right now");
+    }
+#endif
   }
 
   // Check if the top Q has a better candidate.
@@ -207,6 +216,15 @@
     assert(TopCand.Reason != NoCand && "failed to find the first candidate");
   } else {
     LLVM_DEBUG(traceCandidate(TopCand));
+#ifndef NDEBUG
+    if (VerifyScheduling) {
+      SchedCandidate TCand;
+      TCand.reset(CandPolicy());
+      pickNodeFromQueue(Top, TopPolicy, DAG->getTopRPTracker(), TCand);
+      assert(TCand.SU == TopCand.SU &&
+           "Last pick result should correspond to re-picking right now");
+    }
+#endif
   }
 
   // Pick best from BotCand and TopCand.
Index: llvm/lib/CodeGen/MachineScheduler.cpp
===================================================================
--- llvm/lib/CodeGen/MachineScheduler.cpp
+++ llvm/lib/CodeGen/MachineScheduler.cpp
@@ -82,6 +82,10 @@
 DumpCriticalPathLength("misched-dcpl", cl::Hidden,
                        cl::desc("Print critical path length to stdout"));
 
+cl::opt<bool> VerifyScheduling(
+    "verify-misched", cl::Hidden,
+    cl::desc("Verify machine instrs before and after machine scheduling"));
+
 } // end namespace llvm
 
 #ifndef NDEBUG
@@ -122,9 +126,6 @@
                                         cl::desc("Enable memop clustering."),
                                         cl::init(true));
 
-static cl::opt<bool> VerifyScheduling("verify-misched", cl::Hidden,
-  cl::desc("Verify machine instrs before and after machine scheduling"));
-
 // DAG subtrees must have at least this many nodes.
 static const unsigned MinSubtreeSize = 8;
 
Index: llvm/include/llvm/CodeGen/MachineScheduler.h
===================================================================
--- llvm/include/llvm/CodeGen/MachineScheduler.h
+++ llvm/include/llvm/CodeGen/MachineScheduler.h
@@ -100,6 +100,7 @@
 
 extern cl::opt<bool> ForceTopDown;
 extern cl::opt<bool> ForceBottomUp;
+extern cl::opt<bool> VerifyScheduling;
 
 class LiveIntervals;
 class MachineDominatorTree;


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