[PATCH] D119944: [AMDGPU] Return better Changed status from AMDGPUPerfHintAnalysis

[Jay Foad via Phabricator via llvm-commits]

foad created this revision.
foad added a reviewer: piotr.
Herald added subscribers: kerbowa, hiraditya, t-tye, tpr, dstuttard, yaxunl, nhaehnle, jvesely, kzhuravl, arsenm.
foad requested review of this revision.
Herald added subscribers: llvm-commits, wdng.
Herald added a project: LLVM.

Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D119944

Files:
  llvm/lib/Target/AMDGPU/AMDGPUPerfHintAnalysis.cpp


Index: llvm/lib/Target/AMDGPU/AMDGPUPerfHintAnalysis.cpp
===================================================================
--- llvm/lib/Target/AMDGPU/AMDGPUPerfHintAnalysis.cpp
+++ llvm/lib/Target/AMDGPU/AMDGPUPerfHintAnalysis.cpp
@@ -267,19 +267,23 @@
                     << " LSMInst cost: " << Info->LSMInstCost << '\n'
                     << " TotalInst cost: " << Info->InstCost << '\n');
 
+  bool Changed = false;
+
   if (isMemBound(*Info)) {
     LLVM_DEBUG(dbgs() << F.getName() << " is memory bound\n");
     NumMemBound++;
     F.addFnAttr("amdgpu-memory-bound", "true");
+    Changed = true;
   }
 
   if (AMDGPU::isEntryFunctionCC(F.getCallingConv()) && needLimitWave(*Info)) {
     LLVM_DEBUG(dbgs() << F.getName() << " needs limit wave\n");
     NumLimitWave++;
     F.addFnAttr("amdgpu-wave-limiter", "true");
+    Changed = true;
   }
 
-  return true;
+  return Changed;
 }
 
 bool AMDGPUPerfHint::isMemBound(const AMDGPUPerfHintAnalysis::FuncInfo &FI) {


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