[llvm-commits] CVS: llvm/lib/Transforms/Utils/SimplifyCFG.cpp

[Chris Lattner]

Changes in directory llvm/lib/Transforms/Utils:

SimplifyCFG.cpp updated: 1.26 -> 1.27

---
Log message:

If a block is made dead, make sure to promptly remove it.


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Diffs of the changes:  (+8 -0)

Index: llvm/lib/Transforms/Utils/SimplifyCFG.cpp
diff -u llvm/lib/Transforms/Utils/SimplifyCFG.cpp:1.26 llvm/lib/Transforms/Utils/SimplifyCFG.cpp:1.27
--- llvm/lib/Transforms/Utils/SimplifyCFG.cpp:1.26	Tue Feb 24 01:23:58 2004
+++ llvm/lib/Transforms/Utils/SimplifyCFG.cpp	Tue Feb 24 10:09:21 2004
@@ -512,6 +512,14 @@
       
       Preds.pop_back();
     }
+
+    // If this block is now dead, remove it.
+    if (pred_begin(BB) == pred_end(BB)) {
+      // We know there are no successors, so just nuke the block.
+      M->getBasicBlockList().erase(BB);
+      return true;
+    }
+
   } else if (SwitchInst *SI = dyn_cast<SwitchInst>(BB->begin())) {
     // If the only instruction in this block is a switch instruction, see if we
     // can fold the switch instruction into a switch in a predecessor block.