diff options
Diffstat (limited to 'lib/CodeGen')
| -rw-r--r-- | lib/CodeGen/MachineLICM.cpp | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/lib/CodeGen/MachineLICM.cpp b/lib/CodeGen/MachineLICM.cpp index 72f7d4549c..0edd44ba2e 100644 --- a/lib/CodeGen/MachineLICM.cpp +++ b/lib/CodeGen/MachineLICM.cpp @@ -247,6 +247,8 @@ void MachineLICM::HoistRegionPostRA(MachineDomTreeNode *N) { if (!CurLoop->contains(BB)) continue; // Conservatively treat live-in's as an external def. + // FIXME: That means a reload that's reused into a fallthrough block + // will not be LICM'ed. for (MachineBasicBlock::const_livein_iterator I = BB->livein_begin(), E = BB->livein_end(); I != E; ++I) { unsigned Reg = *I; @@ -282,7 +284,8 @@ void MachineLICM::HoistRegionPostRA(MachineDomTreeNode *N) { } } - // FIXME: Only consider reloads for now. + // FIXME: Only consider reloads for now. We should be able to handle + // remat which does not have register operands. bool SkipCheck = false; int FI; if (SeenDef && !RuledOut) { |