add FIXME

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106126 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 3 insertions, 0 deletions

diff --git a/lib/CodeGen/SjLjEHPrepare.cpp b/lib/CodeGen/SjLjEHPrepare.cpp
index a002ef8a62..9aa2b69f65 100644
--- a/lib/CodeGen/SjLjEHPrepare.cpp
+++ b/lib/CodeGen/SjLjEHPrepare.cpp
@@ -289,6 +289,9 @@ splitLiveRangesAcrossInvokes(SmallVector<InvokeInst*,16> &Invokes) {
       }
 
       // If we decided we need a spill, do it.
+      // FIXME: Spilling this way is overkill, as it forces all uses of
+      // the value to be reloaded from the stack slot, even those that aren't
+      // in the unwind blocks. We should be more selective.
       if (NeedsSpill) {
         ++NumSpilled;
         DemoteRegToStack(*Inst, true);