diff options
Diffstat (limited to 'lib/Transforms/Utils/SimplifyCFG.cpp')
| -rw-r--r-- | lib/Transforms/Utils/SimplifyCFG.cpp | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/lib/Transforms/Utils/SimplifyCFG.cpp b/lib/Transforms/Utils/SimplifyCFG.cpp index 15124003d2..ca59276f2b 100644 --- a/lib/Transforms/Utils/SimplifyCFG.cpp +++ b/lib/Transforms/Utils/SimplifyCFG.cpp @@ -512,6 +512,14 @@ bool llvm::SimplifyCFG(BasicBlock *BB) { 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. |