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| author | Chris Lattner <sabre@nondot.org> | 2004-02-24 16:09:21 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2004-02-24 16:09:21 +0000 |
| commit | 90ea78edba19cb531890b2944760263338bdcdf5 (patch) | |
| tree | 38da9e578a68ad50b1615f655406cc770e1418a0 /llvm/lib/Transforms | |
| parent | 1dd872ce9439743854a11d0f9c7179d5abafb95e (diff) | |
| download | bcm5719-llvm-90ea78edba19cb531890b2944760263338bdcdf5.tar.gz bcm5719-llvm-90ea78edba19cb531890b2944760263338bdcdf5.zip | |
If a block is made dead, make sure to promptly remove it.
llvm-svn: 11799
Diffstat (limited to 'llvm/lib/Transforms')
| -rw-r--r-- | llvm/lib/Transforms/Utils/SimplifyCFG.cpp | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/llvm/lib/Transforms/Utils/SimplifyCFG.cpp b/llvm/lib/Transforms/Utils/SimplifyCFG.cpp index 15124003d24..ca59276f2b7 100644 --- a/llvm/lib/Transforms/Utils/SimplifyCFG.cpp +++ b/llvm/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. |
