[llvm] [IRBuilder] Fold binary intrinsics (PR #80743)

[Yingwei Zheng via llvm-commits]

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@@ -117,6 +117,11 @@ class InstSimplifyFolder final : public IRBuilderFolder {
     return simplifyCastInst(Op, V, DestTy, SQ);
   }
 
+  Value *FoldBinaryIntrinsic(Intrinsic::ID ID, Value *LHS,
+                             Value *RHS) const override {
+    return simplifyBinaryIntrinsic(ID, LHS->getType(), LHS, RHS, SQ, nullptr);
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dtcxzyw wrote:

`LHS->getType()` is incorrect for `@llvm.is.fpclass`. I don't know why `abs/ctlz/cttz/is.fpclass` are treated as binary intrinsics.


https://github.com/llvm/llvm-project/pull/80743