diff options
Diffstat (limited to 'llvm/lib/Transforms')
| -rw-r--r-- | llvm/lib/Transforms/Scalar/LICM.cpp | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/llvm/lib/Transforms/Scalar/LICM.cpp b/llvm/lib/Transforms/Scalar/LICM.cpp index c706248267f..99725b5f738 100644 --- a/llvm/lib/Transforms/Scalar/LICM.cpp +++ b/llvm/lib/Transforms/Scalar/LICM.cpp @@ -847,8 +847,10 @@ void LICM::PromoteAliasSet(AliasSet &AS, return; // Don't sink stores from loops without dedicated block exits. Exits // containing indirect branches are not transformed by loop simplify, - // make sure we catch that. - if (!HasDedicatedExits) + // make sure we catch that. An additional load may be generated in the + // preheader for SSA updater, so also avoid sinking when no preheader + // is available. + if (!HasDedicatedExits || !Preheader) return; // Note that we only check GuaranteedToExecute inside the store case |
