[llvm] [RISCV][VLOPT] Allow propagation even when VL isn't VLMAX (PR #112228)

[Michael Maitland via llvm-commits]

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@@ -721,8 +796,9 @@ bool RISCVVLOptimizer::checkUsers(std::optional<Register> &CommonVL,
     }
 
     if (!CommonVL) {
-      CommonVL = VLOp.getReg();
-    } else if (*CommonVL != VLOp.getReg()) {
+      CommonVL = VLInfo(VLOp);
+      LLVM_DEBUG(dbgs() << "    User VL is: " << VLOp << "\n");
+    } else if (!CommonVL->isCompatible(VLOp)) {
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michaelmaitland wrote:

Great suggestion! I have updated the patch.

https://github.com/llvm/llvm-project/pull/112228