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Change a bunch of isVolatile() checks to check for atomic load/store as well.

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No tests; these changes aren't really interesting in the sense that the logic is the same for volatile and atomic.

I believe this completes all of the changes necessary for the optimizer to handle loads and stores correctly.  I'm going to try and come up with some additional testing, though.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139533 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Eli Friedman
2011-09-12 20:23:13 +00:00
parent a073795023
commit 2bc3d52b9a
5 changed files with 19 additions and 19 deletions
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4
lib/Transforms/Scalar/JumpThreading.cpp
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@ -811,8 +811,8 @@ bool JumpThreading::ProcessBlock(BasicBlock *BB) {
/// important optimization that encourages jump threading, and needs to be run
/// interlaced with other jump threading tasks.
bool JumpThreading::SimplifyPartiallyRedundantLoad(LoadInst *LI) {
// Don't hack volatile loads.
if (LI->isVolatile()) return false;
// Don't hack volatile/atomic loads.
if (!LI->isSimple()) return false;
// If the load is defined in a block with exactly one predecessor, it can't be
// partially redundant.