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-rw-r--r--llvm/lib/Transforms/Vectorize/LoopVectorize.cpp6
1 files changed, 5 insertions, 1 deletions
diff --git a/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp b/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
index af05683273d..fcd8b05b883 100644
--- a/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
+++ b/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
@@ -7429,6 +7429,9 @@ getScalarEpilogueLowering(Function *F, Loop *L, LoopVectorizeHints &Hints,
ScalarEvolution *SE, DominatorTree *DT,
const LoopAccessInfo *LAI) {
ScalarEpilogueLowering SEL = CM_ScalarEpilogueAllowed;
+ bool PredicateOptDisabled = PreferPredicateOverEpilog.getNumOccurrences() &&
+ !PreferPredicateOverEpilog;
+
if (Hints.getForce() != LoopVectorizeHints::FK_Enabled &&
(F->hasOptSize() ||
llvm::shouldOptimizeForSize(L->getHeader(), PSI, BFI)))
@@ -7436,7 +7439,8 @@ getScalarEpilogueLowering(Function *F, Loop *L, LoopVectorizeHints &Hints,
else if (PreferPredicateOverEpilog ||
Hints.getPredicate() == LoopVectorizeHints::FK_Enabled ||
(TTI->preferPredicateOverEpilogue(L, LI, *SE, *AC, TLI, DT, LAI) &&
- Hints.getPredicate() != LoopVectorizeHints::FK_Disabled))
+ Hints.getPredicate() != LoopVectorizeHints::FK_Disabled &&
+ !PredicateOptDisabled))
SEL = CM_ScalarEpilogueNotNeededUsePredicate;
return SEL;
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