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| author | Owen Anderson <resistor@mac.com> | 2007-07-23 22:05:54 +0000 |
|---|---|---|
| committer | Owen Anderson <resistor@mac.com> | 2007-07-23 22:05:54 +0000 |
| commit | 5e68f0c93d8963f876f971d6c65a354fbef1e8a4 (patch) | |
| tree | 4cf69a03a3f50e69b9a7a766cadf6d2ae2e22dc1 | |
| parent | 70fce4c6892d8f7dd84b5270f597c052485bdd4d (diff) | |
| download | bcm5719-llvm-5e68f0c93d8963f876f971d6c65a354fbef1e8a4.tar.gz bcm5719-llvm-5e68f0c93d8963f876f971d6c65a354fbef1e8a4.zip | |
Don't delete volatile loads. Doing so is not safe.
llvm-svn: 40448
| -rw-r--r-- | llvm/lib/Transforms/Scalar/FastDLE.cpp | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/llvm/lib/Transforms/Scalar/FastDLE.cpp b/llvm/lib/Transforms/Scalar/FastDLE.cpp index 001f834b5f0..74712ad83fe 100644 --- a/llvm/lib/Transforms/Scalar/FastDLE.cpp +++ b/llvm/lib/Transforms/Scalar/FastDLE.cpp @@ -69,6 +69,12 @@ bool FDLE::runOnBasicBlock(BasicBlock &BB) { for (BasicBlock::iterator BBI = BB.begin(), BBE = BB.end(); BBI != BBE; ++BBI) { // If we find a store or a free... if (LoadInst* L = dyn_cast<LoadInst>(BBI)) { + // We can't delete volatile loads + if (L->isVolatile()) { + lastLoad[L->getPointerOperand()] = L; + continue; + } + Value* pointer = L->getPointerOperand(); LoadInst*& last = lastLoad[pointer]; |
