[clang] [llvm] [LoongArch] Support LA V1.1 feature that div.w[u] and mod.w[u] instructions with inputs not signed-extended. (PR #116764)

[Lu Weining via llvm-commits]

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@@ -118,6 +118,12 @@ def FeatureLAM_BH
                         "Support amswap[_db].{b/h} and amadd[_db].{b/h} instructions.">;
 def HasLAM_BH : Predicate<"Subtarget->hasLAM_BH()">;
 
+// Assume div.w[u] and mod.w[u] can handle inputs that are not sign-extended.
+def FeatureDiv32
+    : SubtargetFeature<"div32", "HasDiv32", "true",
+                        "Support div.w[u] and mod.w[u] can handle inputs that are not sign-extended">;
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SixWeining wrote:

The `true` here is not the default value. It means when we have feature `div32`, then set `HasDiv32` to `true`.

But the test doesn't show how this feature work. I think it need some changes.

https://github.com/llvm/llvm-project/pull/116764