[llvm] UTC: support debug output from LDist (PR #93208)

[Ramkumar Ramachandra via llvm-commits]

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@@ -231,17 +231,16 @@ class InstPartition {
     }
   }
 
-  void print() const {
-    if (DepCycle)
-      dbgs() << "  (cycle)\n";
+  void print(raw_ostream &OS) const {
+    OS << (DepCycle ? " (cycle)\n" : "\n");
     for (auto *I : Set)
       // Prefix with the block name.
-      dbgs() << "  " << I->getParent()->getName() << ":" << *I << "\n";
+      OS << "  " << I->getParent()->getName() << ":" << *I << "\n";
   }
 
-  void printBlocks() const {
+  void printBlocks(raw_ostream &OS) const {
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artagnon wrote:

The `print()` function on line 530 takes an output stream, so I thought I should change the other `print` function and `printBlocks` to take an output stream as well, for uniformity. Besides, this is also the convention used in other `dump()` functions in the tree.

https://github.com/llvm/llvm-project/pull/93208