[llvm] [Matrix] Lower vector reductions using shape info (PR #142055)

[Florian Hahn via llvm-commits]

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@@ -1430,6 +1558,10 @@ class LowerMatrixIntrinsics {
       if (ShapeMap.contains(U.getUser()))
         continue;
 
+      if (auto *Intr = dyn_cast<IntrinsicInst>(U.getUser()))
+        if (tryLowerIntrinsic(Intr))
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fhahn wrote:

This is done here because we don't have shape info for those. Wondering if it would be possible/cleaner to set shape info for them to 1x1?

https://github.com/llvm/llvm-project/pull/142055