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[AArch64] Add a FIXME about invalid KILL markers after the ld/st opt pass. 

llvm-svn: 260264
This commit is contained in:
Chad Rosier 2016-02-09 19:42:19 +00:00
parent 155ca8f251
commit 3f8b09da3f
1 changed files with 5 additions and 0 deletions
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llvm/lib/Target/AArch64/AArch64LoadStoreOptimizer.cpp
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@ -1911,6 +1911,11 @@ bool AArch64LoadStoreOpt::runOnMachineFunction(MachineFunction &Fn) {
// FIXME: Do we need/want a pre-alloc pass like ARM has to try to keep
// loads and stores near one another?
// FIXME: When pairing store instructions it's very possible for this pass to
// hoist a store with a KILL marker above another use (without a KILL marker).
// The resulting IR is invalid, but nothing uses the KILL markers after this
// pass, so it's never caused a problem in practice.
/// createAArch64LoadStoreOptimizationPass - returns an instance of the
/// load / store optimization pass.
FunctionPass *llvm::createAArch64LoadStoreOptimizationPass() {