[Mlir-commits] [mlir] [MLIR] Add logging to eraseUnreachableBlocks (NFC) (PR #153968)

[Jacques Pienaar]

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@@ -209,13 +227,17 @@ LogicalResult mlir::eraseUnreachableBlocks(RewriterBase &rewriter,
     for (Block *block : depth_first_ext(&region->front(), reachable))
       (void)block /* Mark all reachable blocks */;
 
+    LDBG(2) << "Found " << reachable.size() << " reachable blocks out of "
+            << region->getBlocks().size() << " total blocks";
+
     // Collect all of the dead blocks and push the live regions onto the
     // worklist.
     for (Block &block : llvm::make_early_inc_range(*region)) {
       if (!reachable.count(&block)) {
+        LDBG() << "Erasing unreachable block: " << █
         block.dropAllDefinedValueUses();
         rewriter.eraseBlock(&block);
-        erasedDeadBlocks = true;
+        erasedDeadBlocks++;
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jpienaar wrote:

Pre-inc?

https://github.com/llvm/llvm-project/pull/153968