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

[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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heiher wrote:

Clang is not the only LLVM frontend, and the 3A5000 is still not outdated, so I recommend setting the `div32` feature to `false` by default.

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