diff options
Diffstat (limited to 'llvm/lib/Transforms/Scalar/LICM.cpp')
| -rw-r--r-- | llvm/lib/Transforms/Scalar/LICM.cpp | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/llvm/lib/Transforms/Scalar/LICM.cpp b/llvm/lib/Transforms/Scalar/LICM.cpp index c981a8ff96b..30a70379968 100644 --- a/llvm/lib/Transforms/Scalar/LICM.cpp +++ b/llvm/lib/Transforms/Scalar/LICM.cpp @@ -255,9 +255,11 @@ bool LoopInvariantCodeMotion::runOnLoop(Loop *L, AliasAnalysis *AA, SmallVector<Instruction *, 8> InsertPts; PredIteratorCache PIC; + bool Promoted = false; + // Loop over all of the alias sets in the tracker object. for (AliasSet &AS : *CurAST) - Changed |= promoteLoopAccessesToScalars( + Promoted |= promoteLoopAccessesToScalars( AS, ExitBlocks, InsertPts, PIC, LI, DT, TLI, L, CurAST, &SafetyInfo); // Once we have promoted values across the loop body we have to recursively @@ -266,9 +268,10 @@ bool LoopInvariantCodeMotion::runOnLoop(Loop *L, AliasAnalysis *AA, // FIXME: This is really heavy handed. It would be a bit better to use an // SSAUpdater strategy during promotion that was LCSSA aware and reformed // it as it went. - if (Changed) { + if (Promoted) formLCSSARecursively(*L, *DT, LI, SE); - } + + Changed |= Promoted; } // Check that neither this loop nor its parent have had LCSSA broken. LICM is |
