[PATCH] D119954: [CodeGen] Return better Changed status from PostRAHazardRecognizer

[Jay Foad via Phabricator via llvm-commits]

This revision was automatically updated to reflect the committed changes.
Closed by commit rG074d1e253634: [CodeGen] Return better Changed status from PostRAHazardRecognizer (authored by foad).

Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D119954/new/

https://reviews.llvm.org/D119954

Files:
  llvm/lib/CodeGen/PostRAHazardRecognizer.cpp


Index: llvm/lib/CodeGen/PostRAHazardRecognizer.cpp
===================================================================
--- llvm/lib/CodeGen/PostRAHazardRecognizer.cpp
+++ llvm/lib/CodeGen/PostRAHazardRecognizer.cpp
@@ -76,6 +76,7 @@
     return false;
 
   // Loop over all of the basic blocks
+  bool Changed = false;
   for (auto &MBB : Fn) {
     // We do not call HazardRec->reset() here to make sure we are handling noop
     // hazards at the start of basic blocks.
@@ -85,6 +86,8 @@
       HazardRec->EmitNoops(NumPreNoops);
       TII->insertNoops(MBB, MachineBasicBlock::iterator(MI), NumPreNoops);
       NumNoops += NumPreNoops;
+      if (NumPreNoops)
+        Changed = true;
 
       HazardRec->EmitInstruction(&MI);
       if (HazardRec->atIssueLimit()) {
@@ -92,5 +95,5 @@
       }
     }
   }
-  return true;
+  return Changed;
 }


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