[PATCH] D132880: [SVE] Fix SVEDup0 matching -0.0f

[Stephen Long via Phabricator via llvm-commits]

steplong created this revision.
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This checks for floating point positive zero. That way SVEDup0 won't match -0.0f.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D132880

Files:
  llvm/lib/Target/AArch64/AArch64ISelDAGToDAG.cpp


Index: llvm/lib/Target/AArch64/AArch64ISelDAGToDAG.cpp
===================================================================
--- llvm/lib/Target/AArch64/AArch64ISelDAGToDAG.cpp
+++ llvm/lib/Target/AArch64/AArch64ISelDAGToDAG.cpp
@@ -207,7 +207,7 @@
         if (CN->isZero())
           return true;
       if (auto CN = dyn_cast<ConstantFPSDNode>(Opnd0))
-        if (CN->isZero())
+        if (CN->isZero() && !CN->isNegative())
           return true;
       break;
     }


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