[clang] Make CIR assembly formats strict properties compatible (PR #226600)

[Henrich Lauko via cfe-commits]

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@@ -2947,6 +2947,9 @@ class CIR_FPBinaryOp<string mnemonic, list<Trait> traits = []>
                    !listconcat(CIR_FenvOpTraits, traits),
                    CIR_DynamicMemoryEffects> {
   let arguments = !con(commonArgs, (ins OptionalAttr<CIR_FenvAttr>:$fenv));
+  let assemblyFormat = [{
+    $lhs `,` $rhs `:` type($lhs) (`fenv` `` custom<FenvFields>($fenv)^)? attr-dict
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xlauko wrote:

Same here.

https://github.com/llvm/llvm-project/pull/226600