diff options
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/Transforms/Scalar/LICM.cpp | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/llvm/lib/Transforms/Scalar/LICM.cpp b/llvm/lib/Transforms/Scalar/LICM.cpp index ff7cb3c26c9..470ae3e447e 100644 --- a/llvm/lib/Transforms/Scalar/LICM.cpp +++ b/llvm/lib/Transforms/Scalar/LICM.cpp @@ -737,7 +737,9 @@ bool llvm::canSinkOrHoistInst(Instruction &I, AAResults *AA, DominatorTree *DT, // We can only hoist a store that we can prove writes a value which is not // read or overwritten within the loop. For those cases, we fallback to - // load store promotion instead. + // load store promotion instead. TODO: We can extend this to cases where + // there is exactly one write to the location and that write dominates an + // arbitrary number of reads in the loop. auto &AS = CurAST->getAliasSetFor(MemoryLocation::get(SI)); if (AS.isRef() || !AS.isMustAlias()) |
