[llvm] [BOLT] Avoid extra function dump on invalid BBs found by UCE (NFC) (PR #165111)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-bolt

Author: YongKang Zhu (yozhu)

<details>
<summary>Changes</summary>



---
Full diff: https://github.com/llvm/llvm-project/pull/165111.diff


1 Files Affected:

- (modified) bolt/lib/Passes/BinaryPasses.cpp (+4-1) 


``````````diff
diff --git a/bolt/lib/Passes/BinaryPasses.cpp b/bolt/lib/Passes/BinaryPasses.cpp
index 06e840e84f53b..e1a1856b506cf 100644
--- a/bolt/lib/Passes/BinaryPasses.cpp
+++ b/bolt/lib/Passes/BinaryPasses.cpp
@@ -346,13 +346,16 @@ void EliminateUnreachableBlocks::runOnFunction(BinaryFunction &Function) {
   uint64_t Bytes;
   Function.markUnreachableBlocks();
   LLVM_DEBUG({
+    bool HasInvalidBB = false;
     for (BinaryBasicBlock &BB : Function) {
       if (!BB.isValid()) {
+        HasInvalidBB = true;
         dbgs() << "BOLT-INFO: UCE found unreachable block " << BB.getName()
                << " in function " << Function << "\n";
-        Function.dump();
       }
     }
+    if (HasInvalidBB)
+      Function.dump();
   });
   BinaryContext::IndependentCodeEmitter Emitter =
       BC.createIndependentMCCodeEmitter();

``````````

</details>


https://github.com/llvm/llvm-project/pull/165111