[PATCH] D79475: [SVE] Fix getAlignmentInfo for scalable vectors

[David Sherwood via Phabricator via llvm-commits]

This revision was automatically updated to reflect the committed changes.
Closed by commit rGa400aa5faf78: [SVE] Fix getAlignmentInfo for scalable vectors (authored by david-arm).

Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D79475/new/

https://reviews.llvm.org/D79475

Files:
  llvm/lib/IR/DataLayout.cpp


Index: llvm/lib/IR/DataLayout.cpp
===================================================================
--- llvm/lib/IR/DataLayout.cpp
+++ llvm/lib/IR/DataLayout.cpp
@@ -559,7 +559,10 @@
     // with what clang and llvm-gcc do.
     unsigned Alignment =
         getTypeAllocSize(cast<VectorType>(Ty)->getElementType());
-    Alignment *= cast<VectorType>(Ty)->getNumElements();
+    // We're only calculating a natural alignment, so it doesn't have to be
+    // based on the full size for scalable vectors. Using the minimum element
+    // count should be enough here.
+    Alignment *= cast<VectorType>(Ty)->getElementCount().Min;
     Alignment = PowerOf2Ceil(Alignment);
     return Align(Alignment);
    }


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