[PATCH] D81617: [SVE] Bail from cstfp_pred_ty before walking scalable vector
Christopher Tetreault via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Wed Jun 10 16:08:20 PDT 2020
ctetreau created this revision.
Herald added subscribers: llvm-commits, psnobl, rkruppe, tschuett.
Herald added a reviewer: efriedma.
Herald added a project: LLVM.
Bail out in cstfp_pred_ty before calling getNumElements and walking the
vector if the vector is scalable.
Repository:
rG LLVM Github Monorepo
https://reviews.llvm.org/D81617
Files:
llvm/include/llvm/IR/PatternMatch.h
Index: llvm/include/llvm/IR/PatternMatch.h
===================================================================
--- llvm/include/llvm/IR/PatternMatch.h
+++ llvm/include/llvm/IR/PatternMatch.h
@@ -333,6 +333,10 @@
if (const auto *CF = dyn_cast_or_null<ConstantFP>(C->getSplatValue()))
return this->isValue(CF->getValueAPF());
+ // Number of elements of a scalable vector unknown at compile time
+ if (isa<ScalableVectorType>(V->getType()))
+ return false;
+
// Non-splat vector constant: check each element for a match.
unsigned NumElts = cast<VectorType>(V->getType())->getNumElements();
assert(NumElts != 0 && "Constant vector with no elements?");
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