[llvm] [LAA] Compute pointer bounds for pattern with urem operation (PR #106574)

[David Sherwood via llvm-commits]

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@@ -1041,13 +1074,10 @@ findForkedPointer(PredicatedScalarEvolution &PSE,
   SmallVector<PointerIntPair<const SCEV *, 1, bool>> Scevs;
   findForkedSCEVs(SE, L, Ptr, Scevs, MaxForkedSCEVDepth);
 
-  // For now, we will only accept a forked pointer with two possible SCEVs
-  // that are either SCEVAddRecExprs or loop invariant.
+  // For now, we will only accept a forked pointer with two possible SCEVs.
   if (Scevs.size() == 2 &&
-      (isa<SCEVAddRecExpr>(get<0>(Scevs[0])) ||
-       SE->isLoopInvariant(get<0>(Scevs[0]), L)) &&
-      (isa<SCEVAddRecExpr>(get<0>(Scevs[1])) ||
-       SE->isLoopInvariant(get<0>(Scevs[1]), L))) {
+      hasComputableBounds(PSE, Ptr, get<0>(Scevs[0]), L, /*Assume*/ false) &&
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david-arm wrote:

This changes to `findForkedPointer` look like a useful NFC patch by itself I think, and would help to reduce the size of this patch.

https://github.com/llvm/llvm-project/pull/106574