[llvm] [AggressiveInstCombine] Fix crash when folding consecutive loads into a type smaller than the combined load (PR #207229)

[Kyungtak Woo via llvm-commits]

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@@ -1269,6 +1269,22 @@ static bool foldLoadsRecursive(Value *V, LoadOps &LOps, const DataLayout &DL,
   }
   LoadInst *LI2 = dyn_cast<LoadInst>(L2);
 
+  // Reject early if the combined size of the loads exceeds the target type
+  // size. This avoids attempting to emit an invalid ZExt (from wider to
+  // narrower type) when out-of-bounds shifts lead to matching too many loads.
+  if (LI2) {
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kevinwkt wrote:

That works for me. Updated.

https://github.com/llvm/llvm-project/pull/207229