[llvm] [VectorCombine] Enable transform 'scalarizeLoadExtract' for non constant indexes (PR #65445)

[Ben Shi via llvm-commits]

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@@ -1173,10 +1176,11 @@ bool VectorCombine::scalarizeLoadExtract(Instruction &I) {
     }
 
     auto ScalarIdx = canScalarizeAccess(VecTy, UI->getOperand(1), &I, AC, DT);
-    if (!ScalarIdx.isSafe()) {
-      // TODO: Freeze index if it is safe to do so.
-      ScalarIdx.discard();
+    if (ScalarIdx.isUnsafe()) {
       return false;
+    } else if (ScalarIdx.isSafeWithFreeze()) {
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benshi001 wrote:

The `else` is removed. Thanks!

https://github.com/llvm/llvm-project/pull/65445